CN103873075A - Narrow-band signal transmission method, signal transmitting device and sampling system - Google Patents

Narrow-band signal transmission method, signal transmitting device and sampling system Download PDF

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CN103873075A
CN103873075A CN201210547883.9A CN201210547883A CN103873075A CN 103873075 A CN103873075 A CN 103873075A CN 201210547883 A CN201210547883 A CN 201210547883A CN 103873075 A CN103873075 A CN 103873075A
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frequency
receiving end
cycle change
signal receiving
change frequency
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CN103873075B (en
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朱胡飞
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties

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Abstract

The invention provides a narrow-band signal transmission method, a signal transmitting device and a sampling system. The method comprises the following steps: obtaining a periodic change frequency fp of a pseudorandom sequence used by a sampling device; determining a parameter xi according to the periodic change frequency fp and a bandwidth B of a narrow-band signal to be transmitted; setting a minimum frequency point and a maximum frequency point of the narrow-band signal to be transmitted according to the periodic change frequency fp and the set parameter xi so as to enable the minimum frequency point to be greater than or equal to (2k-1)fp/2 and the maximum frequency point to be smaller than or equal to xifp+(2k+1)fp/2, wherein k is an integer; transmitting the narrow-band signal to the sampling device. With the adoption of the embodiment provided by the invention, a non-zero position of a sparse matrix to be reconstructed, which is generated by the sampling device, can be effectively reduced, so as to further reduce the computation complexity of a reconstructed original signal of the sampling device and improve the reconstruction efficiency of the sampling device.

Description

Narrow band signal sending method, sender unit and sampling system
Technical field
The present invention relates to the communication technology, relate in particular to a kind of narrow band signal sending method, sender unit and sampling system.
Background technology
Compressed sensing theory is to compressible signal by carrying out data sampling far below the mode of Nyquist Nyquist standard, and the data volume of collection is far smaller than traditional sampling desired data amount, and accurately reconstruct primary signal.
Particularly, compressed sensing theory mainly comprises three aspects such as rarefaction representation, encoding measurement and the restructing algorithm of signal.Wherein, the rarefaction representation of signal projects to signal orthogonal transform base exactly, and the conversion vector obtaining is sparse or approximate sparse.For example y 200=Φ 200 × 800s 800sparse matrix, be the rarefaction representation of primary signal S.Wherein, S is the column vector of 800 primary signals.This S vector is through Φ 200 × 800orthogonal transform after obtain sparse matrix y 200, only include much smaller than the matrix of 800 nonzero values.Conventional transform-based has: dct basis, fast Fourier transform base, wavelet transform base, bent wave conversion (Curvelet) base, windowed FFT (Gabor) base and redundant dictionary etc.In encoding measurement, first select stable projection matrix, prototype structure that can inhibit signal in order to ensure the linear projection of signal, projection matrix must meet constraint isometry (Restrictedisometry property, RIP) condition, meets y=Φ S=Φ Ψ hunder the constraints of x=Tx, find the minimum x of nonzero element number, last Accurate Reconstruction primary signal S=Ψ hx.Wherein, T=Φ Ψ hfor sensing matrix.
Sampling apparatus as shown in Figure 1 realize principle schematic, sampling apparatus is the one of signal receiving end.Sampling apparatus receives the primary signal x (t) that sender unit sends.This primary signal x (t) comprises Num_band narrow band signal, and the bandwidth of each narrow band signal is B; And sampling apparatus comprises m sampling channel altogether.Each passage is processed and samples primary signal x (t).The pseudo random sequence P that sampling apparatus is first Tp with the cycle at each passage i(t) multiply each other with primary signal x (t), the result multiplying each other
Figure BDA00002602702200011
be 1/ (2T through cut-off frequency s) low pass filter h (t), then be f by the sample rate lower than Nyquist sample rate s=1/T slow rate analog to digital converter ADC sample.Thereafter the sample sequence y that, sampling apparatus obtains according to each passage 1[n], y 2[n] ..., y m[n], (n=1,2 ..., Num_sample), with signal reconfiguring method recovery primary signal x (t).The sample sequence of i passage is expressed as y i[n], wherein n=1,2 ..., Num_sample, Num_sample is the total number of sampling.Pseudo random sequence P i(t) cycle is T p, the frequency of its cycle variation is f p=1/T p.It is pointed out that pseudo random sequence P i(t) sequence that normally value changes between+1 and-1.In described sampling system, pseudo random sequence P i(t) frequency that value changes is not less than Nyquist sample rate conventionally, and described pseudo random sequence P i(t) cycle is T p, refer at next T pin cycle, repeat a T pthe pseudo random sequence in cycle.
Fig. 2 is the operation principle from the above-mentioned sampling apparatus of angle analysis of frequency domain.The frequency spectrum of primary signal x (t) is X (f), as shown in Figure 2 a.The operation principle of above-mentioned sampling apparatus is equivalent to following process:
1. X (f) being divided into several width is f ppart, as shown in Figure 2 a.In the middle of the dotted line of two adjacent vertical directions of Fig. 2 a, a width is f exactly ppart, can easily be seen by figure, shown in each width f of being divided into of the dotted line of vertical direction pinterval respectively: [(2K+1) fp/2,-(2K-1) fp/2] ..., [5fp/2,-3fp/2], [3fp/2,-fp/2], [fp/2, fp/2], [fp/2,3fp/2], [3fp/2,5fp/2] ..., [(2K-1) fp/2, (2K+1) fp/2].Wherein, K is natural number.Here [a, b] represents an interval from frequency a to frequency b, and interval comprises all frequencies that are greater than a and are less than b.Can see, the interval of each width fp that the dotted line of the vertical direction shown in Fig. 2 a is divided into can be expressed as [(2k-1) fp/2, (2k+1) fp/2], k=-K wherein ...-2 ,-1,0,1,2 ... K.
2. above-mentioned several width of being got by X (f) are f ppart, form a sparse vector, i.e. the fewer vector of item of nonzero value, as shown in Figure 2 b.
3. the sample sequence y that sampling apparatus obtains according to each passage 1[n], y 2[n] ..., y m[n], (n=1,2 ..., Num_sample), with signal reconfiguring method recovery primary signal x (t).
Can find out from Fig. 2 a and 2b, in above-mentioned sparse vector, there is no the position of narrow band signal is zero, has the position of narrow band signal non-vanishing.Because a narrow band signal 3 is separated by the dotted line shown in Fig. 2 a on frequency domain, therefore a narrow band signal 3 needs corresponding two non-zero positions in sparse vector, and then make in sparse vector non-zero position more, the number m of the sampling channel of required employing is also just larger, and the complexity of reconstruct primary signal also just increases thereupon.
Summary of the invention
Many aspects of the present invention provide a kind of narrow band signal sending method, sender unit and sampling system, in order to reduce the complexity of signal reconstruction.
First aspect of the present invention, provides a kind of narrow band signal sending method, comprising:
Sender unit obtains the cycle change frequency f of signal receiving end pseudo random sequence used p;
Described sender unit is according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ;
Described sender unit is according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer;
Described sender unit sends described narrow band signal to described signal receiving end.
Narrow band signal sending method as above, wherein, described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
Described sender unit obtains request to described signal receiving end transmission frequency, so that described signal receiving end, according to described frequency acquisition request, feeds back and carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pobtain response;
Described sender unit responds according to described frequency acquisition, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p;
Or described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
Described sender unit sends mark to described signal receiving end and obtains request, so that described signal receiving end obtains request according to described mark, feedback carries the response of obtaining of frequency mark;
Described sender unit is according to frequency mark and pseudo random sequence P i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p;
Or described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
What described sender unit received that described signal receiving end sends carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pcell;
Described sender unit, according to described cell, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p.
Narrow band signal sending method as above, described sender unit is according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ, comprising:
If described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, described sender unit determines that described parameters ξ equals zero;
If described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, described sender unit determines that described parameters ξ is for being less than B/f p, and be more than or equal to B/f p-1 positive integer.
Second aspect of the present invention, provides a kind of sender unit, comprising:
Acquisition module, for obtaining the cycle change frequency f of signal receiving end pseudo random sequence used p;
Determination module, for according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ;
Module is set, for according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer;
Sending module, for sending described narrow band signal to described signal receiving end.
Sender unit as above, described acquisition module, comprising:
Transmitting element, for sending and obtain request to described signal receiving end, so that obtain request described in described signal receiving end basis, feedback carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pobtain response;
The first acquiring unit, obtains response for described in basis, obtains the signal receiving end pseudo random sequence P used of described signal receiving end i(t) cycle change frequency f p;
Or
Described transmitting element, for sending and obtain request to described signal receiving end, so that obtain request described in described signal receiving end basis, feedback carries the response of obtaining of frequency mark;
Described the first acquiring unit, for identifying and pseudo random sequence P according to frequency i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p;
Or described acquisition module, comprising:
Receiving element, carries described signal receiving end pseudo random sequence P used for what receive that described signal receiving end sends i(t) cycle change frequency f pcell;
Second acquisition unit, for according to described cell, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p.
Sender unit as above, wherein, described determination module, specifically for working as described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals zero; As described cycle change frequency f pwhile being more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ is for being less than B/f p, and be more than or equal to B/f p-1 positive integer.
The 3rd aspect of the present invention, provides a kind of sampling system, comprises sender unit and signal receiving end that the embodiment of the present invention provides.
As shown from the above technical solution, the embodiment of the present invention is by arranging minimum frequency and the maximum frequency of narrow band signal to be sent, sampling apparatus just can significantly be reduced according to non-zero position in the sparse matrix for the treatment of reconstruct of the described narrow band signal generation receiving, and the required sampling channel of sampling apparatus also can effectively reduce, and then reduced the complexity of sampling apparatus reconstruct primary signal, improve the reconstruct efficiency of sampling apparatus.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the sampling principle schematic diagram of prior art sampling apparatus;
Fig. 2 a be prior art sampling apparatus before reconstruct primary signal, the schematic diagram of the narrow band signal that L sampling channel collects on frequency domain;
Fig. 2 b is that prior art sampling apparatus is according to the principle schematic of the sparse vector of the narrow band signal generation receiving;
The schematic flow sheet of Fig. 3 narrow band signal sending method provided by the invention embodiment mono-;
Fig. 4 is the principle schematic that adopts the sparse vector that the method post-sampling device described in the embodiment of the present invention one generates according to the narrow band signal receiving;
Fig. 5 is that in prior art, the bandwidth B when narrow band signal is greater than described sampling apparatus pseudo random sequence P used i(t) when cycle change frequency fp, the schematic diagram of the described narrow band signal that sampling apparatus collects on frequency domain;
Fig. 6 is the method described in the employing embodiment of the present invention, when the bandwidth B of narrow band signal is greater than described sampling apparatus pseudo random sequence P used i(t) when cycle change frequency fp, the schematic diagram of the described narrow band signal that sampling apparatus collects on frequency domain;
Fig. 7 is the structural representation of sender unit embodiment mono-provided by the invention;
Fig. 8 is the structural representation of acquisition module one specific implementation example in sender unit embodiment provided by the invention;
Fig. 9 is the structural representation of another specific implementation example of acquisition module in sender unit embodiment provided by the invention;
Figure 10 is the structural representation of sampling system embodiment mono-provided by the invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Should understand, the technical scheme of the embodiment of the present invention can be applied to various communication systems, for example: global system for mobile telecommunications (Global System of Mobile communication, referred to as " GSM ") system, code division multiple access (Code Division Multiple Access, referred to as " CDMA ") system, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, referred to as " WCDMA ") system, GPRS (General Packet Radio Service, referred to as " GPRS "), Long Term Evolution (Long Term Evolution, referred to as " LTE ") system, LTE Frequency Division Duplexing (FDD) (Frequency Division Duplex, referred to as " FDD ") system, LTE time division duplex (Time Division Duplex, referred to as " TDD "), universal mobile telecommunications system (UniversalMobile Telecommunication System, referred to as " UMTS "), the interconnected inserting of microwave in the whole world (Worldwide Interoperability for Microwave Access, referred to as " WiMAX ") communication system etc.
As shown in Figure 3, the schematic flow sheet of narrow band signal sending method embodiment mono-provided by the invention.As shown in FIG., the method described in the present embodiment one, comprises the steps:
Step 101, sender unit obtain sampling apparatus pseudo random sequence P used i(t) cycle change frequency fp.
Sender unit can be base station or access point AP.Described sampling apparatus is positioned at signal receiving end, for example mobile phone, mobile site etc.The signal receiving end of the embodiment of the present invention is the receiving terminal that adopts compression sampling technology.In embodiment, sampling apparatus can be thought signal receiving end below.Particularly, described sender unit obtains the pseudo random sequence P used of described sampling apparatus i(t) execution mode of cycle change frequency fp, can adopt any one in following four kinds of modes:
The first execution mode: described sender unit is pre-stored with described sampling apparatus pseudo random sequence P used i(t) the frequency f p that cycle changes.Described sender unit directly obtains this pseudo random sequence P from storage area i(t) the frequency f p that cycle changes.It should be noted that described sender unit and described sampling apparatus all observe same communication protocol, stipulate described sampling apparatus pseudo random sequence P used by described communication protocol i(t) the frequency f p that cycle changes; Conventionally, described communication protocol openly becomes communication standard.
The second execution mode: first, described sender unit obtains request to described sampling apparatus transmission frequency, so that described sampling apparatus, according to described frequency acquisition request, feeds back and carries described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f pobtain response.Then, described sender unit responds according to described frequency acquisition, obtains described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f p.
The third execution mode: first, described sender unit sends mark to described sampling apparatus and obtains request, so that described sampling apparatus obtains request according to described mark, feedback carries the response of obtaining of frequency mark.Then, described sender unit is according to frequency mark and pseudo random sequence P i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p.It should be noted that described sender unit and described sampling apparatus all observe same communication protocol, stipulate described frequency mark and described pseudo random sequence P by described communication protocol i(t) cycle change frequency f pcorresponding relation.
The 4th kind of execution mode: first, what described sender unit received that described sampling apparatus sends carries described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f pcell.Then, described sender unit, according to described cell, obtains described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f p.
Step 102, described sender unit are according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ.
Particularly, described sender unit is by judgement, if described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals zero; If described cycle change frequency f pbe less than the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ is for being less than B/f p, and be more than or equal to B/f p-1 positive integer.It should be noted that described sender unit and described sampling apparatus all observe same communication protocol, when described communication protocol stipulates described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, described parameters ξ must equal zero.
Step 103, described sender unit are according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer, is f even if described narrow band signal to be sent takies the bandwidth of the least possible number pfrequency separation, each width f that the dotted line of the vertical direction shown in Fig. 2 a is divided into pinterval [(2k-1) fp/2, (2k+1) fp/2], k is wherein integer.
Particularly, the narrow band signal that described sender unit sends, it can be the baseband signal that is B by a bandwidth, be be more than or equal to-B/2 of frequency range, and be less than or equal to the signal of B/2, the narrow band signal obtaining by upconverting to carrier frequency point can be directly also a baseband signal that bandwidth is B.After the baseband signal that a bandwidth is B upconverts to carrier frequency point, conventionally all comprise two parts, i.e. positive frequency part 1 and negative frequency part 2, the shared frequency separation of these two parts is about initial point 0 symmetry, as shown in Figure 2 a.That is, after a baseband signal upconverts to carrier frequency point, if positive frequency part is [a, a+B], negative frequency part is [a-B ,-a], and a is positive number here.So in this case, above-mentioned steps 103 is specially:
If described narrow band signal is the narrow band signal that baseband signal obtains by upconverting to carrier frequency point, according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer, and is not equal to zero; The i.e. narrow band signal in positive frequency part, k value is positive integer, in the narrow band signal of negative frequency part, k value is negative integer.Distinguishingly, if described narrow band signal is baseband signal, be not suitable for the described method that the present embodiment provides, the minimum frequency point setting of described baseband signal is-B/2 that the maximum frequency point setting of described baseband signal is B/2.
Here it should be noted that: described sender unit can only arrange a narrow band signal to be sent, can be also two, or more than two.Certainly, the narrow band signal to be sent that described sender unit arranges is more, and described sampling apparatus is according to the narrow band signal receiving, and the non-zero position in generation reconstruct sparse vector is fewer, and the reconstruct complexity of sampling apparatus is just lower like this, and reconstruct efficiency is higher.
Step 104, described sender unit send described narrow band signal to described sampling apparatus.
Particularly, described sender unit sends described narrow band signal to described sampling apparatus.Example as shown in Figure 4, when the bandwidth B of described narrow band signal is less than or equal to described sampling apparatus pseudo random sequence P used i(t) when cycle change frequency fp, adopt the described narrow band signal launching technique of this enforcement, make described narrow band signal between two neighbouring sample frequencies of described sampling apparatus, the example shown in Fig. 2 a of the prior art specifically can be characterized by Fig. 4.Fig. 4 is that the method described in the employing embodiment of the present invention one sends narrow band signal post-sampling device before reconstruct primary signal, the schematic diagram of the narrow band signal that multiple sampling channels collect on frequency domain.From Fig. 2 a and Fig. 4, in the sparse matrix shown in Fig. 2 a, non-zero number is 4, and in the sparse matrix shown in Fig. 4, non-zero number is 2.Obviously the method described in the employing embodiment of the present invention one can reduce to half by the calculating parameter for the treatment of reconstruction processing of the prior art, can reduce like this quantity of sampling channel, the complexity that has reduced sampling apparatus reconstruct primary signal, has improved sampling apparatus reconstruct efficiency.Here it should be noted that: all narrow band signals that in the example shown in Fig. 4, sender unit is launched have all adopted the method described in the present embodiment to arrange.Method described in employing the present embodiment one, as long as a narrow band signal to be sent is arranged, just can reduce the number of the nonzero value in the last sparse matrix generating of sampling apparatus, and then reduces the complexity of reconstruct primary signal.Obviously, the narrow band signal to be sent that sender unit adopts the method described in the present embodiment one to arrange is more, just more can reduce the complexity of the reconstruction calculations of sampling apparatus.When the bandwidth B of described narrow band signal is greater than described sampling apparatus pseudo random sequence P used i(t) when cycle change frequency fp, adopt the described narrow band signal launching technique of this enforcement, make described narrow band signal few change frequency interval [(2k-1) f that takies sampling apparatus that tries one's best p/ 2, (ξ f p+ (2k+1) f p/ 2] quantity.Fig. 5 shows and is greater than described sampling apparatus pseudo random sequence P used when the bandwidth B of narrow band signal i(t) when cycle change frequency fp, the schematic diagram of the described narrow band signal that prior art sampling apparatus collects on frequency domain, as shown in Figure 5, narrow band signal accounts for 3 change frequency interval [(2k-1) f p/ 2, ξ f p+ (2k+1) f p/ 2].The described method that adopts the embodiment of the present invention to provide, as shown in Figure 6, described narrow band signal only accounts for 2 change frequency interval [(2k-1) f p/ 2, ξ f p+ (2k+1) f p/ 2].Obviously, adopt the method described in the embodiment of the present invention one the non-zero calculating parameter for the treatment of reconstruction processing of the prior art can be reduced, and then can reduce the complexity of sampling apparatus reconstruct primary signal, improved sampling apparatus reconstruct efficiency.
The present embodiment is by arranging minimum frequency and the maximum frequency of narrow band signal to be sent, sampling apparatus just can significantly be reduced according to non-zero position in the sparse matrix for the treatment of reconstruct of the described narrow band signal generation receiving, and the required sampling channel of sampling apparatus also can effectively reduce, and then reduced the complexity of sampling apparatus reconstruct primary signal, improve the reconstruct efficiency of sampling apparatus.
Here it should be noted that: the minimum frequency of at least one narrow band signal to be sent and the execution mode of maximum frequency are set in above-described embodiment, in the case of the bandwidth B of narrow band signal determined constant, the execution mode of the center frequency point of narrow band signal also can be set instead.Particularly, for the narrow band signal of positive frequency part, center frequency point adds that B/2 just can obtain the maximum frequency of narrow band signal, and center frequency point deducts B/2 and just can obtain the minimum frequency of narrow band signal.Therefore,, in above-described embodiment, described step 102 can be specially: according to described cycle change frequency f p, the center frequency point of at least one narrow band signal to be sent is set, so that described center frequency point is greater than (2k-1) f p/ 2+B/2, and be less than ξ f p+ (2k+1) f p/ 2-B/2, k round numbers.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
As shown in Figure 7, the structural representation of sender unit embodiment mono-provided by the invention.As shown in FIG., the sender unit described in the present embodiment one comprises: acquisition module 10, determination module 20, module 30 and sending module 40 are set.Wherein, described acquisition module 10 is for obtaining the cycle change frequency f of sampling apparatus pseudo random sequence used p.Described determination module 20 is for according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ.The described module 30 that arranges is for according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer.Described sending module 40 is for sending described narrow band signal to described sampling apparatus.
The present embodiment is by arranging minimum frequency and the maximum frequency of narrow band signal to be sent, sampling apparatus just can significantly be reduced according to non-zero position in the sparse matrix for the treatment of reconstruct of the described narrow band signal generation receiving, and the required sampling channel of sampling apparatus also can effectively reduce, and then reduced the complexity of sampling apparatus reconstruct primary signal, improve the reconstruct efficiency of sampling apparatus.
Further, acquisition module described in above-described embodiment can adopt structure as shown in Figure 8 to realize.Particularly, described acquisition module comprises: transmitting element 11 and the first acquiring unit 12.Wherein, described transmitting element is for sending and obtain request to described sampling apparatus, so that obtain request described in described sampling apparatus basis, feedback carries described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f pobtain response.Described acquiring unit obtains response described in basis, obtains the sampling apparatus pseudo random sequence P used of described sampling apparatus i(t) cycle change frequency f p.Or described transmitting element 11 is for sending and obtain request to described sampling apparatus, so that obtain request described in described sampling apparatus basis, feedback carries the response of obtaining of frequency mark.Described the first acquiring unit 12 is for identifying and pseudo random sequence P according to frequency i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p.Or described acquisition module can adopt structure as described in Figure 9 to realize, particularly, as shown in the figure, described acquisition module comprises: receiving element 13 and second acquisition unit 14.Wherein, described receiving element 13 carries described sampling apparatus pseudo random sequence P used for what receive that described sampling apparatus sends i(t) cycle change frequency f pcell.Described second acquisition unit 14, for according to described cell, obtains described sampling apparatus pseudo random sequence P used i(t) cycle change frequency f p.
Further, the determination module described in above-described embodiment specifically for: as described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals zero; As described cycle change frequency f pwhile being more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals to be less than B/f p, and be more than or equal to B/f p-1 positive integer.
In several embodiment provided by the present invention, should be understood that disclosed apparatus and method can realize by another way.For example, device embodiment described above is only schematically, for example, the division of described module, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple modules or assembly can in conjunction with or can be integrated into another system.The described module as separating component explanation can or can not be also physically to separate, and the parts that show as module can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
As shown in figure 10, the structural representation of sampling system embodiment mono-provided by the invention.As shown in FIG., the sampling system described in the present embodiment one, comprising: sender unit 50 and sampling apparatus 60.Wherein said sender unit 50 is for obtaining the cycle change frequency f of sampling apparatus pseudo random sequence used p; According to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ; According to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer; Send described narrow band signal to described sampling apparatus.The narrow band signal that described sampling apparatus 60 sends for receiving described narrow band signal, and the primary signal sending based on compressed sensing principle reconstruct primary signal transmitting apparatus.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part of detailed description, can be referring to the associated description of other embodiment.Those skilled in the art can be well understood to, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
The integrated module that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium (Memory), comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) or processor (processor) carry out the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-OnlyMemory, be called for short ROM), the various media that can be program code stored such as random access memory (Random Access Memory, be called for short RAM), magnetic disc or CD.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (7)

1. a narrow band signal sending method, is characterized in that, comprising:
Sender unit obtains the cycle change frequency f of signal receiving end pseudo random sequence used p;
Described sender unit is according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ;
Described sender unit is according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer;
Described sender unit sends described narrow band signal to described signal receiving end.
2. narrow band signal sending method according to claim 1, is characterized in that, described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
Described sender unit obtains request to described signal receiving end transmission frequency, so that described signal receiving end, according to described frequency acquisition request, feeds back and carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pobtain response;
Described sender unit responds according to described frequency acquisition, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p;
Or described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
Described sender unit sends mark to described signal receiving end and obtains request, so that described signal receiving end obtains request according to described mark, feedback carries the response of obtaining of frequency mark;
Described sender unit is according to frequency mark and pseudo random sequence P i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p;
Or described sender unit obtains signal receiving end pseudo random sequence P used i(t) cycle change frequency f p, comprising:
What described sender unit received that described signal receiving end sends carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pcell;
Described sender unit, according to described cell, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p.
3. narrow band signal sending method according to claim 1 and 2, is characterized in that, described sender unit is according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ, comprising:
If described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, described sender unit determines that described parameters ξ equals zero;
If described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, described sender unit determines that described parameters ξ is for being less than B/f p, and be more than or equal to B/f p-1 positive integer.
4. a sender unit, is characterized in that, comprising:
Acquisition module, for obtaining the cycle change frequency f of signal receiving end pseudo random sequence used p;
Determination module, for according to described cycle change frequency f pand the bandwidth B of narrow band signal to be sent, determine parameters ξ;
Module is set, for according to described cycle change frequency f pwith described parameters ξ, minimum frequency and the maximum frequency of described narrow band signal to be sent is set, so that described minimum frequency is more than or equal to (2k-1) f p/ 2, described maximum frequency is less than or equal to ξ f p+ (2k+1) f p/ 2, wherein, k is integer;
Sending module, for sending described narrow band signal to described signal receiving end.
5. sender unit according to claim 4, is characterized in that, described acquisition module, comprising:
Transmitting element, for sending and obtain request to described signal receiving end, so that obtain request described in described signal receiving end basis, feedback carries described signal receiving end pseudo random sequence P used i(t) cycle change frequency f pobtain response;
The first acquiring unit, obtains response for described in basis, obtains the signal receiving end pseudo random sequence P used of described signal receiving end i(t) cycle change frequency f p;
Or
Described transmitting element, for sending and obtain request to described signal receiving end, so that obtain request described in described signal receiving end basis, feedback carries the response of obtaining of frequency mark;
Described the first acquiring unit, for identifying and pseudo random sequence P according to frequency i(t) cycle change frequency f pcorresponding relation, obtain described frequency and identify corresponding pseudo random sequence P i(t) cycle change frequency f p;
Or described acquisition module, comprising:
Receiving element, carries described signal receiving end pseudo random sequence P used for what receive that described signal receiving end sends i(t) cycle change frequency f pcell;
Second acquisition unit, for according to described cell, obtains described signal receiving end pseudo random sequence P used i(t) cycle change frequency f p.
6. according to the sender unit described in claim 4 or 5, it is characterized in that, described determination module, specifically for working as described cycle change frequency f pbe more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals zero; As described cycle change frequency f pwhile being more than or equal to the bandwidth B of described narrow band signal to be sent, determine that described parameters ξ equals to be less than B/f p, and be more than or equal to B/f p-1 positive integer.
7. a sampling system, is characterized in that, comprises arbitrary described sender unit and signal receiving end in the claims 4～6.
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