WO2014094586A1

WO2014094586A1 - Narrow band signal transmitting method, signal transmitting device and sampling system

Info

Publication number: WO2014094586A1
Application number: PCT/CN2013/089632
Authority: WO
Inventors: 朱胡飞
Original assignee: 华为技术有限公司
Priority date: 2012-12-17
Filing date: 2013-12-17
Publication date: 2014-06-26
Also published as: CN103873075B; CN103873075A

Abstract

Provided are a narrow band signal transmitting method, signal transmitting device and sampling system, the method comprising: acquiring a periodic variation frequency f_p in a pseudo random sequence used by a sampling device; determining a setting parameter ξ according to the periodic variation frequency f_p and the bandwidth B of a to-be-transmitted narrow band signal; setting the minimum and maximum frequency points of the to-be-transmitted narrow band signal according to the periodic variation frequency f_p and the setting parameter ξ, the minimum frequency point being greater than or equal to (2k-1) f_p /2, and the maximum frequency point being less than or equal to ξf_p +(2k+1) f_p /2, wherein k is an integer; and transmitting the narrow band signal to the sampling device. An embodiment of the present invention greatly reduces the non-zero position in a to-be-reconstituted sparse matrix generated by a sampling device, thus reducing the calculation complexity of reconstituting an original signal by the sampling device, and improving the reconstitution efficiency of the sampling device.

Description

Narrowband signal transmitting method, signal transmitting device and sampling system

The present invention relates to communication technologies, and in particular, to a narrowband signal transmission method, a signal transmission device, and a sample system.

Background technique

Compressed sensing theory performs data sampling on a compressible signal that is much lower than the Nyquist standard. The amount of data collected is much smaller than that required by conventional samples, and the original signal can be accurately reconstructed. . Specifically, the compression sensing theory mainly includes three aspects: the sparse representation of the signal, the coding measurement, and the reconstruction algorithm. Wherein, the sparse representation of the signal is to project the signal to the orthogonal transform base, and the resulting transform vector is sparse or nearly sparse. For example, the sparse matrix of γ200=Φ200 800S800 is the sparse representation of the original signal S. Where S is the column vector of 800 original signals. The S vector is orthogonally transformed by Φ200 χ 800 to obtain a sparse matrix y200, that is, only a matrix having far less than 800 non-zero values. Commonly used transforming bases are: discrete cosine transform base, fast Fourier transform base, discrete wavelet transform base, curvelet base, windowed Fourier transform (Gabor) basis, and redundant dictionary. In the coding measurement, the stable projection matrix is first selected. In order to ensure that the signal's line projection can maintain the original structure of the signal, the projection matrix must satisfy the Constrained Isometry property (RIP) condition, that is, satisfy y= Φ. Under the constraint of S= Φ Ψ Hx=Tx, find the X with the least number of non-zero elements, and finally reconstruct the original signal S= W Hx accurately. Where Τ=Φ Ψ Η is the sensing matrix. As shown in the schematic principle of the sample device shown in Fig. 1, the sample device is a kind of signal receiving end. The sampling device receives the original signal x(t:) transmitted by the signal transmitting device. The original signal x(t) includes Num-band narrowband signals, each narrowband signal has a bandwidth B; and the sample device includes a total of m sample channels. Each channel processes and samples the original signal x(t). The sampling device multiplies the original signal x(t) by a pseudo-random sequence Pi(t) of period Tp in each channel, and the multiplied result passes through a low-pass filter h with a cutoff frequency of l/(2Ts). t), then a low-rate analog-to-digital converter ADC with a sampling rate lower than the Nyquist sample rate of fs=l/Ts. Thereafter, the sample device is based on each channel The obtained sample sequences yl [n], y2[n], ..., ym[n] , ( n= 1,2, — , Num— sample ) are recovered by the signal reconstruction method x(t) . The sequence of the i-th channel is expressed as yi[n], where n=l, 2, ..., Num-sample, and Num-sample are the total number of samples. The period of the pseudo-random sequence Pi(t) is Tp, and the frequency of its periodic variation is φ=1/Τρ. It should be noted that the pseudo-random sequence Pi(t) is usually a sequence whose value varies between +1 and -1. In the sampling system, the frequency of the change of the pseudo-random sequence Pi(t) is usually not less than the Nyquist sampling rate, and the period of the pseudo-random sequence Pi(t) is Tp, which means that in the next Tp period, Repeat the pseudo-random sequence of the last Tp cycle. Fig. 2 is a view showing the operation principle of the above-described sample device from the perspective of the frequency domain. The spectrum of the original signal x(t) is X(f), as shown in Figure 2a. The working principle of the above-described sampling device is equivalent to the following process: 1. Divide X(f) into a plurality of portions having a width of φ, as shown in Fig. 2a. The middle of the two adjacent vertical dashed lines in Fig. 2a is a portion of width fp, which can be easily seen from the figure. The intervals of the respective widths φ divided by the vertical dotted lines are:

[-(2Κ+1)ίρ/2,-(2Κ-1) /2] [-5fp/2,-3fp/2] , [-3φ/2, -φ/2], [-fp/2, Fp/2],

[φ/2, 3φ/2], [3fp/2, 5 /2] [(2K-l)fp/2, (2K+l)fp/2] ₀ where K is a natural number. Here, [a, b] represents an interval from the frequency point a to the frequency point b, and the interval includes all frequency points larger than a and smaller than b. It can be seen that the interval of each width φ divided by the broken line in the vertical direction shown in Fig. 2a can be expressed as [(2k-l) /2, (2k+l)fp/2], where k=-K 2 , -1 , 0, 1 , 2... K.

2. The above-mentioned parts of width φ divided by X(f) form a sparse vector, that is, a vector with less zero value, as shown in Fig. 2b. 3. The sampling sequence obtained by the sampling device according to each channel yl [n], y2[n], ..., ym[n]

( η = 1, 2, ... , Num — sample ), the original signal x(t) is restored by the signal reconstruction method. As can be seen from Figures 2a and 2b, the position of the narrowband signal in the above sparse vector is zero, and the position of the narrowband signal is not zero. Since a narrowband signal 3 is separated in the frequency domain by the dashed line shown in Fig. 2a, a narrowband signal 3 needs to correspond to two non-zero positions in the sparse vector, thereby making the non-zero position in the sparse vector more. The greater the number m of sample channels used, the greater the complexity of reconstructing the original signal.

Summary of the invention

Aspects of the present invention provide a narrowband signal transmitting method, a signal transmitting device, and a sample system System to reduce the complexity of signal reconstruction. A first aspect of the present invention provides a narrowband signal transmission method, including: a signal transmitting apparatus acquires a periodic variation frequency φ of a pseudo random sequence used by a signal receiving end; the signal transmitting apparatus changes a frequency fp according to the period and is to be transmitted a bandwidth B of the narrowband signal, determining a setting parameter ξ; the signal transmitting device sets a minimum frequency and a maximum frequency of the narrowband signal to be transmitted according to the periodic variation frequency fp and the setting parameter 以, so that the The minimum frequency point is greater than or equal to (2k-1) /2, the maximum frequency point is less than or equal to fp + (2k + 1) /2, where k is an integer; the signal transmitting device transmits to the signal receiving end The narrowband signal.

The narrowband signal transmission method as described above, wherein the signal transmitting device acquires the periodic variation frequency fp of the pseudo random sequence Pi(t) used by the signal receiving end, the method comprising: the signal transmitting device transmitting the frequency acquisition to the signal receiving end Soliciting, by the signal receiving end, the acquisition response carrying the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end according to the frequency acquisition request; the signal transmitting device according to the frequency Obtaining a response, obtaining a periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end; or, the signal transmitting device acquiring a periodic variation frequency Φ of the pseudo-random sequence Pi(t) used by the signal receiving end, including: The signal transmitting apparatus sends an identifier acquisition request to the signal receiving end, so that the signal receiving end feeds back an acquisition response carrying a frequency identifier according to the identifier obtaining request; the signal transmitting apparatus according to the frequency identifier and the pseudo random Corresponding relationship of the periodic variation frequency φ of the sequence Pi(t), obtaining the week of the pseudo-random sequence Pi(t) corresponding to the frequency identifier The period change frequency φ; or the signal transmitting device acquires the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end, including: the signal transmitting device receiving the signal transmitted by the signal receiving end and carrying the signal a cell of a periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the receiving end; the signal transmitting device acquires a pseudo-random sequence used by the signal receiving end according to the cell The periodic variation frequency of Pi(t).

The narrowband signal transmitting method as described above, the signal transmitting device determining the setting parameter 根据 according to the periodic variation frequency φ and the bandwidth B of the narrowband signal to be transmitted, including: if the periodic variation frequency φ is greater than or equal to the waiting Sending a bandwidth Β of the narrowband signal, the signal transmitting device determines that the setting parameter ξ is equal to zero; if the periodic variation frequency φ is greater than or equal to a bandwidth Β of the narrowband signal to be transmitted, the signal transmitting device determines the setting parameter ξ is a positive integer less than Β / φ, and greater than or equal to Β / φ-l. A second aspect of the present invention provides a signal transmitting apparatus, including: an acquiring module, configured to acquire a periodic variation frequency fp of a pseudo-random sequence used by a signal receiving end; and a determining module, configured to change a frequency φ according to the period Sending a bandwidth B of the narrowband signal, determining a setting parameter ξ; a setting module, configured to set a minimum frequency and a maximum frequency of the narrowband signal to be transmitted according to the periodic variation frequency fp and the setting parameter , The minimum frequency point is greater than or equal to (2k-l) /2, the maximum frequency point is less than or equal to fp + (2k + l) /2, where k is an integer; a transmitting module, configured to the signal receiving end The narrowband signal is transmitted.

The signal transmitting apparatus as described above, the acquiring module, comprising: a sending unit, configured to send an acquisition request to the signal receiving end, so that the signal receiving end carries the signal receiving according to the obtaining request The acquisition response of the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the terminal; the first obtaining unit, configured to acquire, according to the acquisition response, a period of the pseudo-random sequence Pi(t) used by the signal receiving end of the signal receiving end Change frequency φ; or

The sending unit is configured to send an acquisition request to the signal receiving end, so that the signal receiving end feeds back an acquisition response carrying a frequency identifier according to the obtaining request; the first acquiring unit is configured to use the frequency according to the frequency And identifying a corresponding relationship between the periodic variation frequency φ of the pseudo-random sequence Pi(t), and acquiring a periodic variation frequency of the pseudo-random sequence Pi(t) corresponding to the frequency identifier Rate Φ;

Or the acquiring module includes:

a receiving unit, configured to receive, by the signal receiving end, a cell carrying a periodic variation frequency φ of a pseudo-random sequence Pi(t) used by the signal receiving end; a second acquiring unit, configured to: according to the cell, Obtaining a periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end.

The signal transmitting apparatus as described above, wherein the determining module is specifically configured to: when the period change frequency φ is greater than or equal to a bandwidth of the narrowband signal to be transmitted, determine that the setting parameter ξ is equal to zero; When the variation frequency φ is greater than or equal to the bandwidth Β of the narrowband signal to be transmitted, it is determined that the setting parameter ξ is a positive integer smaller than Β/φ and greater than or equal to Β/φ-1. According to a third aspect of the present invention, there is provided a sample system comprising a signal transmitting apparatus and a signal receiving end according to embodiments of the present invention.

According to the foregoing technical solution, the embodiment of the present invention sets the minimum frequency point and the maximum frequency point of the narrowband signal to be transmitted, so that the sampling device generates a non-zero position in the sparse matrix to be reconstructed according to the received narrowband signal. The utility model can be greatly reduced, and the sample channel required for the sample device can be effectively reduced, thereby reducing the complexity of reconstructing the original signal of the sample device and improving the reconstruction efficiency of the sample device.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic view showing the principle of a sample device of the prior art;

2a is a schematic diagram of a narrowband signal collected by L sample channels in the frequency domain before the original signal is reconstructed by the prior art sampling device; FIG. 2b is a prior art sampling device generated according to the received narrowband signal. Schematic diagram of the sparse vector; 3 is a schematic flow chart of Embodiment 1 of a method for transmitting a narrowband signal according to the present invention; FIG. 4 is a schematic diagram showing a principle of a sparse vector generated by a sample device according to a received narrowband signal after using the method according to Embodiment 1 of the present invention; 5 is a schematic diagram of the narrowband signal collected by the sampling device in the frequency domain when the bandwidth B of the narrowband signal is greater than the periodic variation frequency φ of the pseudorandom sequence Pi(t) used by the sampling device in the prior art. ;

6 is a diagram of the method according to the embodiment of the present invention, when the bandwidth B of the narrowband signal is greater than the periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the sampling device, FIG. 7 is a schematic structural diagram of a signal transmitting apparatus according to Embodiment 1 of the present invention; FIG. 8 is a schematic structural diagram of a specific implementation example of an acquiring module in a signal transmitting apparatus according to an embodiment of the present invention; 9 is a schematic structural diagram of another specific implementation example of an acquisition module in an embodiment of a signal transmitting apparatus provided by the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 1 of a sample system provided by the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile communication ("GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "CDMA") system, Wideband Code Division Multiple Access ("WCDMA") system, General Packet Radio Service ("GPRS"), Long Term Evolution (Long Term Evolution, Referred to as "LTE" system, LTE frequency division duplex ( Division Duplex (referred to as "FDD") system, LTE Time Division Duplex ("TDD"), Universal Mobile Telecommunication System (UMTS), Global Interconnected Microwave Access ( Worldwide Interoperability for Microwave Access, referred to as "WiMAX" communication system. FIG. 3 is a schematic flowchart diagram of Embodiment 1 of a method for transmitting a narrowband signal according to the present invention. As shown in the figure, the method of the first embodiment includes the following steps: Step 101: The signal transmitting device acquires a periodic variation frequency φ of a pseudo-random sequence Pi(t) used by the sampling device. The signal transmitting device can be a base station or an access point. The sampling device is located at a signal receiving end, such as a mobile phone, a mobile station, or the like. The signal receiving end of the embodiment of the present invention is a receiving end of the compression sampling technology. The sample device in the following embodiment can be considered as a signal receiving end. Specifically, the signal transmitting apparatus acquires an implementation manner of the periodic variation frequency Φ of the pseudo-random sequence Pi(t) used by the sampling device, and may adopt any one of the following four manners: The first embodiment The signal transmitting device prestores a frequency fp of a periodic variation of the pseudo-random sequence Pi(t) used by the sampling device. The signal transmitting device directly acquires the frequency fp of the periodic variation of the pseudo-random sequence Pi(t) from the storage region. It should be noted that both the signal transmitting device and the sampling device comply with the same communication protocol, and the communication protocol specifies the frequency fp of the periodic variation of the pseudo-random sequence Pi(t) used by the sampling device; The communication protocol is disclosed as a communication standard.

a second embodiment: first, the signal transmitting device sends a frequency acquisition request to the sampling device, so that the sampling device feeds back a pseudo random sequence carried by the sampling device according to the frequency acquisition request The acquisition response of the periodic variation frequency φ of Pi(t). Then, the signal transmitting device acquires a periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the sampling device according to the frequency acquisition response. The third embodiment: First, the signal transmitting device sends an identifier acquisition request to the sampling device, so that the sampling device feeds back the acquisition response carrying the frequency identifier according to the identifier obtaining request. Then, the signal transmitting device acquires a periodic variation frequency of the pseudo random sequence Pi(t) corresponding to the frequency identifier according to the correspondence between the frequency identifier and the periodic variation frequency fp of the pseudo random sequence Pi(t). It should be noted that both the signal transmitting device and the sampling device comply with the same And a communication protocol, wherein the communication protocol specifies a correspondence between the frequency identifier and a periodic variation frequency φ of the pseudo-random sequence Pi(t).

Fourth Embodiment: First, the signal transmitting apparatus receives a cell transmitted by the sampling apparatus and carrying a periodic variation frequency fp of a pseudo-random sequence Pi(t) used by the sampling apparatus. Then, the signal transmitting device acquires a periodic variation frequency of the pseudo-random sequence Pi(t) used by the sampling device according to the cell.

Step 102: The signal transmitting apparatus determines a setting parameter 根据 according to the period change frequency φ and the bandwidth B of the narrowband signal to be transmitted. Specifically, the signal transmitting apparatus determines that, if the period change frequency fp is greater than or equal to the bandwidth B of the narrowband signal to be transmitted, determining that the setting parameter ξ is equal to zero; if the period change frequency φ is smaller than the After the bandwidth of the narrowband signal is to be transmitted, it is determined that the setting parameter ξ is less than B/fp and is greater than or equal to a positive integer of B/fp-1. It should be noted that both the signal transmitting device and the sampling device comply with the same communication protocol. When the communication protocol specifies that the periodic variation frequency φ is greater than or equal to the bandwidth B of the narrowband signal to be transmitted, The setting parameter ξ must be equal to zero. Step 103: The signal transmitting apparatus sets a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted according to the periodic change frequency φ and the setting parameter ξ, so that the minimum frequency point is greater than or equal to (2k -l) fp/2, the maximum frequency point is less than or equal to fp + (2k + l) /2, where k is an integer, even if the narrowband signal to be transmitted occupies as few frequencies as possible with a bandwidth of φ The interval, the vertical dotted line shown in Fig. 2a is divided into intervals [(2k - 1) QV2, (2k + l) fp / 2] of each width fp, where k is an integer. Specifically, the narrowband signal sent by the signal transmitting apparatus may be a baseband signal with a bandwidth B, that is, a signal with a frequency range greater than or equal to -B/2 and less than or equal to B/2, by upconverting to a carrier frequency point. The obtained narrowband signal can also be directly a baseband signal with a bandwidth of B. When a baseband signal with a bandwidth of B is up-converted to a carrier frequency point, it usually includes two parts, that is, a positive frequency portion 1 and a negative frequency portion 2, and the frequency intervals occupied by the two portions are symmetric with respect to the origin 0, as shown in FIG. 2a. Show. That is, after a baseband signal is up-converted to the carrier frequency point, if the positive frequency portion is [a, a+B], the negative frequency portion is [-aB, -a], where a is a positive number. Therefore, in this case, the above step 103 is specifically: If the narrowband signal is a narrowband signal obtained by upconverting the baseband signal to a carrier frequency point, setting a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted according to the periodic variation frequency φ and the setting parameter ,, So that the minimum frequency point is greater than or equal to (2k-1)fp/2, the maximum frequency point is less than or equal to fp +(2k+l)fp/2, where k is an integer and is not equal to zero; The narrowband signal of the positive frequency portion, the k value is a positive integer, the narrowband signal is in the negative frequency portion, and the k value is a negative integer. In particular, if the narrowband signal is a baseband signal, the method is not applicable to the method provided in this embodiment. The minimum frequency of the baseband signal is set to -B/2, and the maximum frequency of the baseband signal is set to B/2. It should be noted here that: the signal transmitting device may only set one narrowband signal to be transmitted, or may be two or more. Of course, the more the narrowband signal to be transmitted is set by the signal transmitting device, the less the non-zero position in the reconstructed sparse vector is generated according to the received narrowband signal, so that the reconstruction complexity of the device is as follows. The lower the efficiency, the higher the reconstruction efficiency. Step 104: The signal transmitting device sends the narrowband signal to the sampling device. Specifically, the signal transmitting device transmits the narrowband signal to the sampling device. As shown in the example of FIG. 4, when the bandwidth B of the narrowband signal is less than or equal to the periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the sampling device, the narrowband signal transmission method of the present embodiment is used. The narrowband signal is caused between two adjacent sampling frequency points of the sampling device, and the example shown in FIG. 2a in the prior art can be specifically characterized as FIG. 4. 4 is a schematic diagram of a narrowband signal collected by a plurality of sampling channels in a frequency domain before the original signal is reconstructed by the sampling device after the method of the first embodiment of the present invention transmits the narrowband signal. 2a and 4, the non-zero number in the sparse matrix shown in Fig. 2a is four, and the non-zero number in the sparse matrix shown in Fig. 4 is two. Obviously, the method of the first embodiment of the present invention can reduce the calculation parameters of the prior art to be reconstructed to half, which can reduce the number of sample channels and reduce the complexity of reconstructing the original signal of the sample device. The degree has improved the reconstruction efficiency of the sample device. It should be noted here that all the narrowband signals transmitted by the signal transmitting device in the example shown in FIG. 4 are set by the method described in this embodiment. By using the method according to the first embodiment, as long as a narrowband signal to be transmitted is set, the number of non-zero values in the sparse matrix finally generated by the sampling device can be reduced, thereby reducing the complexity of reconstructing the original signal. Obviously, the more the narrowband signals to be transmitted set by the signal transmitting apparatus using the method described in the first embodiment, the more the complexity of the reconstruction calculation of the sampling apparatus can be reduced. When the bandwidth B of the narrowband signal is greater than the periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the sampling device, the narrowband described in this embodiment is used. a signal transmission method, such that the narrowband signal occupies as little as possible the frequency interval of the sampling device

[(2k-l)fp/2, ( ξ ίρ +(2k+l)fp/2]. Figure 5 shows that the bandwidth B of the narrowband signal is larger than the pseudo-random sequence Pi(t) used by the sampling device The periodic variation frequency fp, the schematic diagram of the narrowband signal collected by the prior art device in the frequency domain, as shown in FIG. 5, the narrowband signal occupies 3 varying frequency intervals [(2k-l)fp /2, ξ ίρ + (21ί+1) /2] ₀釆 using the method provided by the embodiment of the present invention, as shown in FIG. 6, the narrowband signal only occupies 2 varying frequency intervals [(2k-l) Fp/2, ξ fp +(2k+l)fp/2]. Obviously, the method according to the first embodiment of the present invention can reduce the non-zero calculation parameters of the prior art to be reconstructed, and further The complexity of reconstructing the original signal of the sample device is reduced, and the reconstruction efficiency of the sample device is improved.

In this embodiment, by setting a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted, the sampling device can greatly reduce the non-zero position in the sparse matrix to be reconstructed according to the received narrowband signal, and The sample channel required by the device can also be effectively reduced, thereby reducing the complexity of reconstructing the original signal of the sample device and improving the reconstruction efficiency of the sample device. It should be noted that, in the foregoing embodiment, an implementation manner of setting a minimum frequency point and a maximum frequency point of at least one narrowband signal to be transmitted may be changed to a narrow band when the bandwidth B of the narrowband signal has been determined to be unchanged. The implementation of the center frequency of the signal. Specifically, for the narrowband signal of the positive frequency portion, the maximum frequency of the narrowband signal can be obtained by adding B/2 to the center frequency, and the minimum frequency of the narrowband signal can be obtained by subtracting B/2 from the center frequency. Therefore, in the above embodiment, the step 102 may be specifically: setting a center frequency point of at least one narrowband signal to be transmitted according to the period change frequency φ, so that the center frequency point is greater than (2k-l) Fp/2+B/2 , and less than ξ fp +(2k+l)fp/2- B/2 , k is an integer. One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

FIG. 7 is a schematic structural diagram of Embodiment 1 of a signal transmitting apparatus provided by the present invention. As shown in the figure, the signal transmitting apparatus of the first embodiment includes: an obtaining module 10, a determining module 20, a setting module 30, and a transmitting module 40. The obtaining module 10 is configured to obtain a periodic variation frequency φ of a pseudo-random sequence used by the sampling device. The determining module 20 is configured to change the frequency according to the period The rate φ and the bandwidth B of the narrowband signal to be transmitted determine the setting parameter ξ. The setting module 30 is configured to set a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted according to the periodic change frequency φ and the setting parameter ξ, so that the minimum frequency point is greater than or equal to (2k- l) /2, the maximum frequency point is less than or equal to fp + (2k + l) /2, where k is an integer. The sending module 40 is configured to send the narrowband signal to the sampling device. In this embodiment, by setting a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted, the sampling device can greatly reduce the non-zero position in the sparse matrix to be reconstructed according to the received narrowband signal, and The sample channel required by the device can also be effectively reduced, thereby reducing the complexity of reconstructing the original signal of the sample device and improving the reconstruction efficiency of the sample device.

Further, the obtaining module in the above embodiment may be implemented by using the structure shown in FIG. 8. Specifically, the acquiring module includes: a sending unit 11 and a first acquiring unit 12. The sending unit is configured to send an acquisition request to the sampling device, so that the sampling device feeds back a periodic variation of a pseudo-random sequence Pi(t) carried by the sampling device according to the obtaining request. Get the response of frequency φ. The obtaining unit is configured to acquire, according to the acquisition response, a periodic variation frequency φ of a pseudo-random sequence Pi(t) used by the sampling device of the sampling device. Alternatively, the sending unit 11 is configured to send an acquisition request to the sampling device, so that the sampling device feeds the acquisition response carrying the frequency identifier according to the obtaining request. The first obtaining unit 12 is configured to obtain a periodic change frequency of the pseudo-random sequence Pi(t) corresponding to the frequency identifier according to the correspondence between the frequency identifier and the periodic variation frequency fp of the pseudo-random sequence Pi(t). Alternatively, the obtaining module may be implemented by using the structure as shown in FIG. 9. Specifically, as shown, the acquiring module includes: a receiving unit 13 and a second acquiring unit 14. The receiving unit 13 is configured to receive a cell that is sent by the sampling device and carries a periodic variation frequency fp of a pseudo-random sequence Pi(t) used by the sampling device. The second obtaining unit 14 is configured to acquire, according to the cell, a periodic variation frequency fp of the pseudo-random sequence Pi(t) used by the sampling device.

Further, the determining module in the foregoing embodiment is specifically configured to: when the period change frequency fp is greater than or equal to the bandwidth B of the narrowband signal to be sent, determine that the setting parameter ξ is equal to zero; When φ is greater than or equal to the bandwidth Β of the narrowband signal to be transmitted, it is determined that the setting parameter ξ is equal to a positive integer smaller than Β/φ and greater than or equal to Β/φ-1. In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative, For example, the division of the modules is only a logical function division, and the actual implementation may have another division manner, for example, multiple modules or components may be combined or integrated into another system. The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment. FIG. 10 is a schematic structural view of Embodiment 1 of the sample system provided by the present invention. As shown in the figure, the sample system of the first embodiment includes: a signal transmitting device 50 and a sample device 60. The signal transmitting device 50 is configured to obtain a periodic variation frequency fp of the pseudo-random sequence used by the sampling device; and determine a setting parameter according to the periodic variation frequency fp and the bandwidth B of the narrowband signal to be transmitted; Fp and the setting parameter ξ, setting a minimum frequency point and a maximum frequency point of the narrowband signal to be transmitted, such that the minimum frequency point is greater than or equal to (2k-1)fp/2, and the maximum frequency point is less than or Equal to +(2k+l)fp/2, where k is an integer; the narrowband signal is transmitted to the sampling device. The sampling device 60 is configured to receive the narrowband signal transmitted by the narrowband signal, and reconstruct an original signal sent by the original signal transmitting device based on a compression sensing principle. In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in an embodiment can be referred to the related descriptions of other embodiments. A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again. The above-described integrated modules implemented in the form of software functional units can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium (Memory), and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute various embodiments of the present invention. Part of the steps of the method. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or an optical disk, and the like, which can store program codes. Medium. It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: Modifications to the technical solutions described in the foregoing embodiments, or equivalent replacement of some of the technical features; and these modifications or replacements do not make corresponding techniques The essence of the technical solution lies in the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

1. A narrowband signal transmission method, characterized in that it includes: the signal transmitting device obtains the periodic variation frequency Φ of the pseudo-random sequence used by the signal receiving end; the signal transmitting device obtains the periodic variation frequency fp according to the periodic variation frequency fp and the frequency of the narrowband signal to be sent. bandwidth

B. Determine the setting parameter ξ; the signal transmitting device sets the minimum frequency point and the maximum frequency point of the narrowband signal to be sent according to the periodic variation frequency fp and the setting parameter ξ, so that the minimum frequency point is greater than or equal to (2k-l) /2, the maximum frequency point is less than or equal to fp + (2k+l) /2, where k is an integer; the signal transmitting device sends the narrowband signal to the signal receiving end .

2. The narrowband signal transmission method according to claim 1, characterized in that the signal transmitting device obtains the periodic variation frequency φ of the pseudo-random sequence Pi(t) used at the signal receiving end, including: the signal transmitting device transmits The signal receiving end sends a frequency acquisition request, so that the signal receiving end feeds back an acquisition response carrying the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end according to the frequency acquisition request; The signal transmitting device obtains a response according to the frequency and obtains the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end; or, the signal transmitting device obtains the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end. The periodic variation frequency Φ includes: the signal transmitting device sends an identification acquisition request to the signal receiving end, so that the signal receiving end feeds back an acquisition response carrying the frequency identification according to the identification acquisition request; the signal transmitting device The device obtains the periodic variation frequency φ of the pseudo-random sequence Pi(t) corresponding to the frequency identifier according to the corresponding relationship between the frequency identifier and the periodic variation frequency φ of the pseudo-random sequence Pi(t); or, the signal transmitting device obtains the signal The periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the receiving end includes: The signal transmitting device receives the periodic variation frequency of the pseudo-random sequence Pi(t) used by the signal receiving end and is sent by the signal receiving end. fp cell; The signal transmitting device obtains the pseudo-random sequence used by the signal receiving end according to the information element.

The periodic change frequency of Pi(t).

3. The narrowband signal transmission method according to claim 1 or 2, characterized in that the signal transmitting device determines the setting parameter ξ according to the periodic variation frequency φ and the bandwidth B of the narrowband signal to be transmitted, including: If The periodic variation frequency φ is greater than or equal to the bandwidth B of the narrowband signal to be sent, and the signal transmitting device determines that the setting parameter ξ is equal to zero;

If the periodic variation frequency φ is greater than or equal to the bandwidth B of the narrowband signal to be sent, the signal transmitting device determines that the setting parameter ξ is a positive integer less than B/φ and greater than or equal to B/φ-l.

4. A signal transmitting device, characterized in that it includes: an acquisition module, used to obtain the periodic variation frequency fp of the pseudo-random sequence used at the signal receiving end; a determination module, used to determine the periodic variation frequency φ and the narrowband signal to be sent according to the periodic variation frequency φ The bandwidth B of , determine the setting parameter ξ; a setting module, used to set the minimum frequency point and the maximum frequency point of the narrowband signal to be sent according to the periodic variation frequency fp and the setting parameter ξ, so that the minimum frequency point is greater than or equal to (2k-l) /2, and the maximum frequency point is less than or equal to fp + (2k+l) /2, where k is an integer; a sending module, used to send the Narrowband signal.

5. The signal transmitting device according to claim 4, characterized in that the acquisition module includes: a sending unit, configured to send an acquisition request to the signal receiving end, so that the signal receiving end can obtain the signal according to the acquisition request. Request, feedback an acquisition response carrying the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end; The first acquisition unit is used to obtain the signal receiving end of the signal receiving end according to the acquisition response. The periodic variation frequency φ of the pseudo-random sequence Pi(t); or

The sending unit is used to send an acquisition request to the signal receiving end so that the signal is connected to the The receiving end feeds back an acquisition response carrying a frequency identifier according to the acquisition request; the first acquisition unit is used to acquire the frequency according to the corresponding relationship between the frequency identifier and the periodic variation frequency φ of the pseudo-random sequence Pi(t) Identify the periodic variation frequency Φ of the corresponding pseudo-random sequence Pi(t);

Or, the acquisition module includes: a receiving unit, configured to receive the cell sent by the signal receiving end and carrying the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end;

The second acquisition unit is configured to acquire the periodic variation frequency φ of the pseudo-random sequence Pi(t) used by the signal receiving end according to the cell.

6. The signal transmitting device according to claim 4 or 5, characterized in that the determination module is specifically configured to determine the periodic change frequency fp when the periodic variation frequency fp is greater than or equal to the bandwidth B of the narrowband signal to be sent. The setting parameter ξ is equal to zero; when the periodic variation frequency φ is greater than or equal to the bandwidth B of the narrowband signal to be sent, it is determined that the setting parameter ξ is equal to a positive integer less than B/φ, and greater than or equal to B/φ-l .

7. A sampling system, characterized in that it includes the signal transmitting device and the signal receiving end described in any one of the above claims 4 to 6.