CN102223150A - Random sampler using limited long random sequence hybrid frequency - Google Patents
Random sampler using limited long random sequence hybrid frequency Download PDFInfo
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- CN102223150A CN102223150A CN2011100774210A CN201110077421A CN102223150A CN 102223150 A CN102223150 A CN 102223150A CN 2011100774210 A CN2011100774210 A CN 2011100774210A CN 201110077421 A CN201110077421 A CN 201110077421A CN 102223150 A CN102223150 A CN 102223150A
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Abstract
The invention provides a random sampler using limited long random sequence hybrid frequency, comprising a limited long random sequence generating unit which is used for generating and periodically outputting limited long random sequence signals, a hybrid frequency unit which is used for carrying out hybrid frequency on original signals and the limited long random sequence signals to obtain hybrid frequency signals, an integral unit which is used for carrying out integral operation on the hybrid frequency signals to obtain integral signals and a signal transformation unit which is used for transforming the integral signals into digital signals to obtain random sampling signals, wherein the limited long random sequence generating unit, the integral unit and the signal transformation unit are synchronous. The random sampler is low in sampling rate and hardware complexity, and is easy to implement and convenient for a follow-up compressed sensing algorithm to process on the premise of ensuring sampling performances.
Description
Technical field
The present invention relates to the signal processing field, particularly a kind of stochastical sampling device that adopts the mixing of limited personal attendant's machine sequence.
Background technology
Traditional sampling adopts periodic sampling, follows Nyquist (Nyquist) sampling thheorem, and the minimum value of sample rate is the twice of signal bandwidth.Along with signal bandwidth continues to increase, the traditional sampling method has been difficult to adapt to the demand that bandwidth increases, and sampled data two is huge, and hardware burden constantly increases the weight of.Compressed sensing does not then adopt traditional periodic sampling, then adopts the method for stochastical sampling.The design of stochastical sampling device (AIC, Analog to Information Converter) is one of technology of the most critical that is achieved of compressed sensing algorithm.
Present stochastical sampling device mainly is divided into two classes: the first kind, the stochastical sampling device of employing pseudo random sequence mixing.This stochastical sampling device utilizes pseudo random sequence that the sparse signal of importing is carried out mixing earlier, and then adopts the integration sampling device of traditional periodic sampling that signal is carried out the low frequency sampling, and output signal is given follow-up compressed sensing algorithm.This class sampler comprises two kinds of single band and multibands.But because pseudo random sequence adopts 1 and-1 to be its element, just input signal is played the aliasing effect, the function of not randomly drawing, so can not really reach the purpose of stochastical sampling, its performance also is restricted.
Second class is for adopting traditional low sampling rate ADC forming array, delay sampling between the ADC, by selecting the output of each ADC at random, finish the stochastical sampling of equivalence, though this method can be finished stochastical sampling, the circuit maximum operating frequency still is the nyquist sampling rate but select then, and forms ADC array and required memory array, and the complexity of required hardware sharply raises.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, has proposed the stochastical sampling device of the low limited personal attendant's machine of the employing sequence mixing of a kind of stochastical sampling performance height and hardware complexity especially.
For achieving the above object, embodiments of the invention have proposed a kind of stochastical sampling device that adopts the mixing of limited personal attendant's machine sequence, comprise: limited personal attendant's machine sequence generating unit, described limited personal attendant's machine sequence generating unit are used for generating and periodically exporting limited personal attendant's machine sequence signal; The mixing unit, described mixing unit links to each other with described limited personal attendant's machine sequence generating unit, is used for primary signal and described limited personal attendant's machine sequence signal are carried out mixing to obtain mixed frequency signal; Integral unit, described integral unit links to each other with described mixing unit, and described integral unit comprises one or more integrators, is used for described mixed frequency signal is carried out integral operation to obtain integrated signal; And signal conversion unit, described signal conversion unit links to each other with described integral unit, described signal conversion unit comprises one or more signal converters, be used for described integrated signal is converted to digital signal to obtain the stochastical sampling signal, wherein, described limited personal attendant's machine sequence generating unit, described integral unit and described signal conversion unit keep synchronously.
Stochastical sampling device according to the mixing of the limited personal attendant's machine of the employing of embodiment of the invention sequence has the following advantages:
1) stochastical sampling is low in the prerequisite down-sampling rate that guarantees the sampling performance;
2) hardware complexity of stochastical sampling device is low, is easy to realize;
3) the stochastical sampling signal that is generated by stochastical sampling device of the present invention is convenient to the processing of subsequent compression perception algorithm.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural representation according to the stochastical sampling device of the limited personal attendant's machine of the employing of embodiment of the invention sequence mixing;
Fig. 2 is for generating the schematic diagram of limited personal attendant's machine sequence signal according to limited personal attendant's machine sequence generating unit of the embodiment of the invention;
Fig. 3 is the schematic diagram according to limited personal attendant's machine sequence signal of the embodiment of the invention;
Fig. 4 is the structural representation of the stochastical sampling device of integral unit band Protection Counter Functions;
Fig. 5 does not have the structural representation of the stochastical sampling device of Protection Counter Functions for integral unit;
Fig. 6 does not have the structural representation of the stochastical sampling device of Protection Counter Functions integral unit for two-way;
Fig. 7 (a) is respectively the signal schematic representation of each signaling point of stochastical sampling device among Fig. 6 to Fig. 7 (e);
Fig. 8 is the flow chart according to the compressed sensing algorithm of the embodiment of the invention;
Fig. 9 is the schematic diagram that stochastical sampling point is adopted compressed sensing algorithm reconstruction signal;
Figure 10 (a) is the SFDR schematic diagram of limited personal attendant's machine sampling;
Figure 10 (b) is the schematic diagram of the SFDR of pure stochastical sampling; And
Figure 10 (c) is the schematic diagram of the SFDR of scrambler modulation.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Below with reference to the stochastical sampling device 100 of Fig. 1 to Fig. 6 description according to the mixing of the limited personal attendant's machine of the employing of embodiment of the invention sequence.
As shown in Figure 1, stochastical sampling device 100 according to the mixing of the limited personal attendant's machine of the employing of embodiment of the invention sequence comprises: limited personal attendant's machine sequence generating unit 110, mixing unit 120, integral unit 130 and signal conversion unit 140, wherein limited personal attendant's machine sequence generating unit 110, integral unit 130 and signal conversion unit 140 keep synchronously, so that can sample to specific sequence mixing results.
Limited personal attendant's machine sequence generating unit 110 can be carried out the Kronecker product computing with the two-way initiation sequence, thereby generates limited personal attendant's machine sequence (LRS sequence) signal, and limited personal attendant's machine sequence signal that will generate is periodically exported.
Generative process to limited personal attendant's machine sequence signal is described in detail below.
It is long for the sequence A of L and length are the sequence B of M, wherein that the two-way initiation sequence is respectively:
A=(a
0, a
1... a
q... a
L-1), wherein
Q is the random integers between 0 to L-1.Certain distribution is obeyed in the generation of random number, and for example q obeys evenly and distributes, and then probability density function is
0≤q≤L-1, B=(1,1,1 ..., 1), and the element of B all is 1.
Limited personal attendant's machine sequence P that limited personal attendant's machine sequence generating unit 110 generates is
Wherein
Be Kronecker product (Kronecker Production) that the sequence length N of limited personal attendant's machine sequence (LRS sequence) is N=M * L.Limited personal attendant's machine sequence generating unit 110 periodically sends limited personal attendant's machine sequence P that length is N.
The stochastical sampling signal that utilizes stochastical sampling device 100 of the present invention to generate carries out compressed sensing in the later stage to be handled, so the general needs of choosing of M and N are satisfied following requirement:
1) N is that the peak signal that follow-up compressed sensing algorithm can be handled is counted, and M is the measure dot number after the compressed sensing, and wherein, M can be divided exactly N, then L=N/M.
2) M＜＜N, N=128 for example, M=4.
In addition, L is the ratio of random sequence cycle and chip period, i.e. L=T/T
p, wherein T is the cycle of LRS sequence, T
pChip period for the LRS sequence.
In one embodiment of the invention, after limited personal attendant's machine sequence generating unit 110 generates limited personal attendant's machine sequence (LRS sequence), can earlier the LRS sequence be stored in the circulating register (CSR, Cyclic Shift Register), as shown in Figure 2.Circulating register output feeds back to circulating register, thereby limited personal attendant's machine sequence can periodically be exported.
As shown in Figure 3, the length L of sequence A is 8, and the length M of sequence B is 8, and the length N of LRS sequence is 64, and the LRS sequence is as follows:
(0，1，0，0，0，0，0，0，0，0，0，0，1，0，0，0，0，0，0，0，0，1，0，0，0，0，0，1，0，0，0，0，0，0，0，0，0，0，0，1，0，0，0，0，0，0，0，1，0，1，0，0，0，0，0，0，0，0，0，1，0，0，0，0)。
Mixing unit 120 links to each other with limited personal attendant's machine sequence generating unit 110 respectively, carries out mixing with primary signal S (t) with from the LRS sequence signal p (t) of limited personal attendant's machine sequence generating unit 110, obtains mixed frequency signal.Wherein, primary signal S (t) can be the signal of any type, and for example primary signal S (t) is a sparse signal.
In one embodiment of the invention, integral unit 130 can be the integral unit of being with Protection Counter Functions or the integral unit that does not have zero clearing.When integral unit have carry out the one-period integration after initiatively zero clearing and again during the function of next cycle integration, then judge this integral unit band Protection Counter Functions.When integral unit is the effect of accumulator, initiatively zero clearing judges that then this integral unit does not have Protection Counter Functions.
According to the difference of integral unit zero clearing mode, stochastical sampling device 100 can be one of following two kinds of frameworks:
1) integral unit 130 under the prerequisite of strict synchronism, then adopts single channel integrator and ADC to realize stochastical sampling for the integrator of band Protection Counter Functions;
2) integral unit 130 is the integrator of no Protection Counter Functions, then adopts multichannel integrator and multiple signals transducer to realize stochastical sampling.
The schematic diagram of the stochastical sampling device 100 of integral unit 130 band Protection Counter Functions is described below with reference to Fig. 4.
As shown in Figure 4, be input in the integral unit 130 through the signal after mixing unit 120 mixing, wherein integral unit 130 comprises one road integrator, and the cycle of integrator is identical with the cycle of limited personal attendant's machine sequence generating unit 110, is T.Integrator adds up in the T time window continuously to mixed frequency signal, ∫
TS (t) p (t) dt obtains one road integrated signal.Integral unit 130 links to each other with signal conversion unit 140, and signal conversion unit 140 comprises No. one signal converter, and is continuous as the A/D converter (ADC) of the periodic sampling among Fig. 4.Signal converter is converted to digital signal with integrated signal, obtains stochastical sampling signal s (n).Wherein, the sampling period of signal conversion unit 140 also is T, and promptly limited personal attendant's machine sequence generating unit 110, integral unit 130 are identical with the periodicity of signal conversion unit 140.
When adopting the stochastical sampling device 100 acquisition stochastical sampling signal s (n) of above-mentioned integral unit 130 band Protection Counter Functions, limited personal attendant's machine sequence generating unit 110, integral unit 130 and signal conversion unit 140 keep synchronously and aim at.
Below with reference to Fig. 5 the stochastical sampling device 100 that integral unit does not have Protection Counter Functions is described.
As shown in Figure 5, when integral unit 130 no Protection Counter Functions, stochastical sampling device 100 further comprises zero-signal maker 150, first multi-channel switch (S1) 160 and second multi-channel switch (S2) 170.Zero-signal maker 160 can generate and export the multichannel zero-signal.The input of first multi-channel switch (S1) 160 can selectivity region zero-signal maker 150 and mixing unit 120 link to each other, the output of first multi-channel switch (S1) 160 links to each other with integral unit 130.Integral unit 130 comprises a plurality of integrators, and first multi-channel switch (S1) 160 will and come the mixed frequency signal of self-mixing unit 120 optionally to be sent to the input of a plurality of integrators from the zero-signal of zero-signal maker 160.A plurality of integrators carry out integral operation to the signal of input respectively.Particularly, integrator adds up ∫ continuously to the signal of input in the T time window
TS (t) p (t) dt obtains the multichannel integrated signal.Wherein, the cycle of each integrator is identical with the cycle of limited personal attendant's machine sequence generating unit 110, is T.
Obtain because the clear operation of integral unit 130 is the adding up of zero-signal input by zero-signal maker 160, thereby be easy to realize by hardware.
Each signal converter is converted to digital signal with the integrated signal of coupled integrator output.The input of second multi-channel switch (S2) 170 optionally links to each other with the output of a plurality of signal converters, and the output of second multi-channel switch (S2) 170 is optionally exported stochastical sampling signal s (n).Wherein, the sampling period of each signal converter is NT in the signal conversion unit 140, and N is the quantity of signal converter in the signal conversion unit.
The stochastical sampling device that does not have an integrator of Protection Counter Functions with two-way is that example describes below.
As shown in Figure 6, primary signal S (t) and limited personal attendant's machine sequence signal p (t) carry out mixing by mixing unit 120, obtain mixed frequency signal.Wherein, primary signal S (t) can be sinusoidal signal, and shown in Fig. 7 (a), mixed frequency signal is shown in Fig. 7 (b).
First multi-channel switch (S1) 150 is a double-pole switch, has three contacts.Wherein, the one tunnel is the mixed frequency signal of S (t) and p (t), and other two the road are zero-signal.The output of first multi-channel switch (S1) 150 links to each other with integral unit 130, and wherein integral unit 130 comprises first integrator 131 and second integral device 132.Continuously the add up ∫ of 132 pairs of input signals of first integrator 131 and second integral device in the T time window
TS (t) p (t) dt obtains the two-way integrated signal.Wherein, the cycle of each integrator is identical with the cycle of limited personal attendant's machine sequence generating unit 110, is T.Fig. 7 (c) shows the first via integrated signal by first integrator 131 outputs, and Fig. 7 (d) shows the second road integrated signal by 132 outputs of second integral device.
The input of second multi-channel switch (S2) 170 optionally links to each other with the output of first signal converter 141 and secondary signal transducer 142, the output of second multi-channel switch (S2) 170 is optionally exported stochastical sampling signal s (n), shown in Fig. 7 (e).
The direction of first multi-channel switch (S1) 150 is opposite with the direction of second multi-channel switch (S2) 170, works as S
1When connecting one the tunnel, then S2 connects another road.
In one embodiment of the invention, adopt the stochastical sampling device 100 of limited personal attendant's machine sequence mixing can be the periodic sampling device, carry out periodic sampling.
The stochastical sampling signal s (n) that obtains according to the stochastical sampling device 100 of the limited personal attendant's machine of the employing of embodiment of the invention sequence mixing can be used for the compressed sensing algorithm.As shown in Figure 8, the flow process of compressed sensing algorithm comprises the steps:
S801: transmit and storage shorthand sampled signal s (n);
S802: whether the collection of judging signal is distributed capture, if distributed capture is then carried out S803, otherwise carries out S805;
S803: by distributed OMP algorithm computation α;
S804: by the valuation of distributed OMP algorithm computation signal
Output
S805: by OMP algorithm computation α, wherein α is the projection at the orthogonal basis of orthogonal matrix Ψ.When the primary signal of input was sparse signal, α was that k is sparse, promptly has only k non-zero number among the α.
S806: by the valuation of OMP algorithm computation signal
Output
This algorithm adopts OMP method reconstruction signal power spectrum.Each iteration obtains when rebuilding
The atom of support set F, just carry out orthogonalization guaranteeing the optimality of iteration to selecting atom set, thereby reduced iterations by recurrence.The OMP algorithm has guaranteed the optimality of each iteration, has reduced number of iterations, can be accurately reconstruction signal apace.
Fig. 9 (a) shows the input signal s (n) of compressed sensing algorithm, and Fig. 9 (b) is the stochastical sampling point of input signal s (n), the signal of Fig. 9 (c) for adopting the compressed sensing algorithm to recover.Can know compressed sensing algorithm reconstruct primary signal well by comparison diagram 9 (a) and Fig. 9 (c).If the employing nyquist sampling, minimum 16 sampling points of input signal shown in Fig. 9 (a) then, and the stochastical sampling signal s (n) that adopts the stochastical sampling device 100 of the embodiment of the invention to generate then only needs 8 sampling points, sample rate reduces.
Figure 10 (a) modulates the spurious signal inhibition scope (SFDR of three kinds of modes respectively to limited personal attendant's machine sampling, pure stochastical sampling and scrambler to Figure 10 (c), Spurious Free Dynamic Range) compares, thereby the service behaviour of different modes is compared.Wherein, SFDR is defined as the ratio of primary signal power and maximum noise signal power.Wherein, Figure 10 (a) and Figure 10 (b) are logarithmic coordinates, and Figure 10 (c) is conventional coordinate.
As can be seen from Figure 10, the stochastical sampling device 100 and the pure stochastical sampling utensil of the mixing of the limited personal attendant's machine of the employing of embodiment of the invention sequence have roughly the same SFDR index, and much larger than scrambler modulated random sampler SFDR, thereby can know that the stochastical sampling utensil that adopts the finite length sequence mixing has the performance almost of equal value with pure stochastical sampling, and be better than the scrambler modulation system.But the stochastical sampling device 100 of the limited personal attendant's machine of the employing of embodiment of the invention sequence mixing is lower than the hardware complexity of pure stochastical sampling device, be easy to realize.In addition, the stochastical sampling device 100 of the limited personal attendant's machine of the employing of embodiment of the invention sequence mixing is compared with the gating array, and hardware complexity is also low.
In sum, stochastical sampling device 100 hardware complexities of the limited personal attendant's machine of the employing of embodiment of the invention sequence mixing are low, be easy to realize function admirable.
Stochastical sampling device according to the mixing of the limited personal attendant's machine of the employing of embodiment of the invention sequence has the following advantages:
1) stochastical sampling is low in the prerequisite down-sampling rate that guarantees the sampling performance;
2) hardware complexity of stochastical sampling device is low, is easy to realize;
3) the stochastical sampling signal that is generated by stochastical sampling device of the present invention is convenient to the processing of subsequent compression perception algorithm.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (10)
1. a stochastical sampling device that adopts the mixing of limited personal attendant's machine sequence is characterized in that, comprising:
Limited personal attendant's machine sequence generating unit, described limited personal attendant's machine sequence generating unit are used for generating and periodically exporting limited personal attendant's machine sequence signal;
The mixing unit, described mixing unit links to each other with described limited personal attendant's machine sequence generating unit, is used for primary signal and described limited personal attendant's machine sequence signal are carried out mixing to obtain mixed frequency signal;
Integral unit, described integral unit links to each other with described mixing unit, and described integral unit comprises one or more integrators, is used for described mixed frequency signal is carried out integral operation to obtain integrated signal;
Signal conversion unit, described signal conversion unit links to each other with described integral unit, and described signal conversion unit comprises one or more signal converters, is used for described integrated signal is converted to digital signal obtaining the stochastical sampling signal,
Wherein, described limited personal attendant's machine sequence generating unit, described integral unit and described signal conversion unit keep synchronously.
2. stochastical sampling device as claimed in claim 1 is characterized in that, described limited personal attendant's machine sequence generating unit is carried out the Kronecker product computing with the two-way initiation sequence, generates and periodically export limited personal attendant's machine sequence signal.
3. stochastical sampling device as claimed in claim 1 is characterized in that, described limited personal attendant's machine sequence generating unit comprises circulating register,
Described limited personal attendant's machine sequence generating unit is carried out the Kronecker product computing with the two-way initiation sequence and is generated limited personal attendant's machine sequence signal, and described limited personal attendant's machine sequence signal is stored in the described circulating register, periodically export described limited personal attendant's machine sequence signal by described circulating register.
4. stochastical sampling device as claimed in claim 1 is characterized in that, described integral unit is the integral unit of being with Protection Counter Functions or the integral unit that does not have Protection Counter Functions.
5. stochastical sampling device as claimed in claim 4, it is characterized in that, when described integral unit is the integral unit of band Protection Counter Functions, described integral unit comprises an integrator, described signal conversion unit comprises a signal converter, and the cycle of described limited personal attendant's machine sequence generating unit, described integral unit and described signal conversion unit is identical.
6. stochastical sampling device as claimed in claim 4 is characterized in that, when described integral unit was the integral unit of no Protection Counter Functions, described integral unit comprised a plurality of integrators, and described a plurality of integrators carry out integral operation to the signal of input integral device respectively,
Described signal conversion unit comprises a plurality of signal converters, and described a plurality of integrator links to each other with described a plurality of signal converters are corresponding one by one, described each signal converter is converted to digital signal with the integrated signal that the integrator of correspondence is exported respectively, obtain multichannel stochastical sampling signal, described stochastical sampling device also comprises:
Zero-signal maker, described zero-signal maker are used for generating and output multichannel zero-signal;
First multi-channel switch, the input of described first multi-channel switch optionally link to each other with described mixing unit with described zero-signal maker, and described zero-signal or mixed frequency signal are sent to the input of described a plurality of integrators;
Second multi-channel switch, the input of described second multi-channel switch optionally links to each other with the output of described a plurality of signal converters, the output output stochastical sampling signal of described second multi-channel switch.
7. stochastical sampling device as claimed in claim 6, it is characterized in that, the cycle of described each integrator is all identical with the cycle of described limited personal attendant's machine sequence generating unit, and the cycle of described each signal converter be described limited personal attendant's machine sequence generating unit cycle N doubly, wherein, N is the quantity of signal converter in the described signal conversion unit.
8. stochastical sampling device as claimed in claim 6, it is characterized in that, described integral unit comprises first integrator and second integral device, described signal conversion unit comprises first signal converter and secondary signal transducer, wherein, described first integrator links to each other with described first signal converter, and described second integral device links to each other with described secondary signal transducer, and the cycle of described first signal converter and secondary signal transducer is 2 times of cycle of described limited personal attendant's machine sequence generating unit.
9. as each described stochastical sampling device in the claim 1,5,6, it is characterized in that described integral unit is the A/D converter of periodic sampling.
10. as each described stochastical sampling device among the claim 1-8, it is characterized in that, described stochastical sampling signal is carried out compressed sensing handle.
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|---|---|---|---|---|
| CN104065383A (en) * | 2014-06-23 | 2014-09-24 | 中国工程物理研究院电子工程研究所 | Analog information conversion method based on sampling control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545024A (en) * | 1983-04-27 | 1985-10-01 | At&T Bell Laboratories | Hybrid natural random number generator |
| CN101064707A (en) * | 2006-04-28 | 2007-10-31 | 北京泰美世纪科技有限公司 | Bandlimited stochastic sequence generating method and its apparatus |
| US20080136697A1 (en) * | 2006-12-08 | 2008-06-12 | International Business Machines Corporation | Method and system for random number generator with random sampling |
| CN101967741A (en) * | 2009-07-27 | 2011-02-09 | 海尔集团公司 | Washing method of washing machine with elevating function |
-
2011
- 2011-03-29 CN CN 201110077421 patent/CN102223150B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545024A (en) * | 1983-04-27 | 1985-10-01 | At&T Bell Laboratories | Hybrid natural random number generator |
| CN101064707A (en) * | 2006-04-28 | 2007-10-31 | 北京泰美世纪科技有限公司 | Bandlimited stochastic sequence generating method and its apparatus |
| US20080136697A1 (en) * | 2006-12-08 | 2008-06-12 | International Business Machines Corporation | Method and system for random number generator with random sampling |
| CN101967741A (en) * | 2009-07-27 | 2011-02-09 | 海尔集团公司 | Washing method of washing machine with elevating function |
Non-Patent Citations (1)
| Title |
|---|
| 陆兴平: "连续随机变量与相关随机序列的通用产生算法研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》, vol. 2006, no. 3, 15 March 2006 (2006-03-15), pages 136 - 32 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065383A (en) * | 2014-06-23 | 2014-09-24 | 中国工程物理研究院电子工程研究所 | Analog information conversion method based on sampling control |
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