CN114296035B - Design method, device, equipment and medium for integrated shared waveform of detection communication - Google Patents
Design method, device, equipment and medium for integrated shared waveform of detection communication Download PDFInfo
- Publication number
- CN114296035B CN114296035B CN202111667108.2A CN202111667108A CN114296035B CN 114296035 B CN114296035 B CN 114296035B CN 202111667108 A CN202111667108 A CN 202111667108A CN 114296035 B CN114296035 B CN 114296035B
- Authority
- CN
- China
- Prior art keywords
- data
- segment
- data frame
- sub
- communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 121
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000013461 design Methods 0.000 title claims abstract description 35
- 238000009432 framing Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims description 31
- 238000004590 computer program Methods 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 abstract description 18
- 230000010354 integration Effects 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000006870 function Effects 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012772 sequence design Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The application relates to a design method, a device, equipment and a medium for detecting and communicating integrated shared waveforms, wherein the method comprises the following steps: determining the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal, and calculating parameters of the radar signal; dividing the data frame into a plurality of sections of sub-data frames according to the parameters, and inserting a corresponding data sequence into each section of sub-data frame; carrying out low code rate Polar coding and interleaving on data according to the payload communication rate required by a user; pre-coding the whole data frame after framing the interleaved data, and continuously modulating the coded data in phase to obtain a continuous phase modulation CPM baseband signal; and carrying out frequency conversion on the CPM baseband signal by taking the chirp signal as a carrier wave to generate a detection communication integrated signal. Therefore, the technical problems of communication performance deterioration and the like caused by serious waveform spectrum expansion and difficult frequency offset phase deviation estimation of detection communication integration based on chirp signals are solved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a medium for designing a shared waveform with integrated detection and communication.
Background
With the development of informatization, the military combat platform needs to be provided with a plurality of devices to complete the functions of detection, communication, countermeasure and the like, which results in huge size and energy consumption of the platform, and the problem of mutual interference between independent radars and communication devices is particularly remarkable because the frequency bands occupied by radar signals and communication signals are increasingly overlapped. In addition to military scenarios, in applications such as internet of vehicles and unmanned aerial vehicle clusters, the connection between detection and communication is also becoming more and more tight. The vehicle, unmanned plane and other platforms finish the detection of the surrounding environment and simultaneously transmit the acquired data to other platforms in real time. Thus, detection and communication integration is an important direction of future information system development.
The system of detection communication integration mainly comprises: and the time sharing, frequency dividing, beam dividing and other resource dividing modes and an integrated shared waveform system. Compared with a resource division system, the integrated waveform is a depth information fusion mode and is suitable for scenes with limited time-frequency resources. Currently, a chirp signal is a widely used waveform in radar, and a very mature radar signal processing scheme is available for the signal. Therefore, the basic idea of the integrated waveform design is to load communication information by taking a chirp signal as a carrier wave, and adjust the fused waveform to simultaneously meet the requirements of communication and detection.
The loading mode of the communication information is an important factor affecting the performance of the integrated waveform. The direct loading of communication information into chirp signals can lead to spectrum broadening of the signals, worsening autocorrelation, affecting detection and communication performance, and needs to be solved.
Content of the application
The application provides a design method, a device, equipment and a medium of detection communication integrated shared waveforms, which are used for solving the technical problems of serious spectrum expansion, difficult estimation of frequency offset phase deviation, communication performance deterioration and the like of detection communication integrated waveforms based on chirp signals in the related technology.
An embodiment of a first aspect of the present application provides a method for designing a shared waveform for integrated detection and communication, including the steps of:
determining the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal, and calculating the parameters of the radar signal;
dividing a data frame into a plurality of sections of sub-data frames according to parameters of the radar signals, and inserting corresponding data sequences into each section of sub-data frames;
determining a coding rate according to the payload communication rate, the number of symbols, the pulse width and the length of a head sequence and a tail sequence in the multi-segment sub-data required by a user, coding based on the coding rate, and interleaving the coded data in rows and columns to obtain interleaved data;
framing the interleaved data, and precoding the whole framed data frame to obtain precoded data;
Performing continuous phase modulation on the coded data to obtain a CPM (Continue Phase Modulation, continuous phase modulation) baseband signal; and
And carrying out frequency conversion on the CPM baseband signal by taking the chirp signal as a carrier wave to generate a detection communication integrated signal.
Optionally, the determining the number of symbols carried on the single radar pulse according to the pulse width and the communication symbol rate of the radar signal includes:
and obtaining the number of symbols carried on the single radar pulse according to the product of the preset pulse width and the communication symbol rate of the radar signal.
Optionally, the multiple segments of sub-data frames include a first segment of sub-data frame, a second segment of sub-data frame, and a third segment of sub-data frame, where the dividing the data frame into multiple segments of sub-data frames according to the parameters of the radar signal, and inserting a corresponding data sequence in each segment of sub-data frame includes:
Obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence;
Obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are randomly modulated, and the last two symbols in the second segment of data frame are 1 and 0;
and obtaining the third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence.
Optionally, the framing the interleaved data and precoding the whole framed data frame to obtain precoded data, including:
performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding;
Combining the head sequence and the tail sequence with the middle data segment to obtain the whole data frame;
and pre-coding the whole data frame to obtain the pre-coded data.
Optionally, the instantaneous frequency of the chirp signal is a linearly increasing frequency.
An embodiment of a second aspect of the present application provides a design apparatus for detecting a communication-integrated shared waveform, including:
The acquisition module is used for determining the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal and calculating the parameters of the radar signal;
The inserting module is used for dividing the data frame into a plurality of sections of sub-data frames according to the parameters of the radar signal and inserting a corresponding data sequence into each section of sub-data frame;
The channel coding module is used for determining the coding rate according to the payload communication rate, the number of symbols, the pulse width and the length of the head-tail sequence in the multi-segment sub-data required by the user, coding based on the coding rate, and interleaving the coded data in rows and columns to obtain interleaved data;
the framing module is used for framing the interleaved data and precoding the whole data frame after framing to obtain precoded data;
the modulation module is used for carrying out continuous phase modulation on the coded data to obtain a continuous phase modulation CPM baseband signal; and
And the generation module is used for carrying out frequency conversion on the CPM baseband signal by taking the chirp signal as a carrier wave to generate a detection communication integrated signal.
Optionally, the acquiring module is specifically configured to:
and obtaining the number of symbols carried on the single radar pulse according to the product of the preset pulse width and the communication symbol rate of the radar signal.
Optionally, the multiple segments of sub-data frames include a first segment of sub-data frame, a second segment of sub-data frame, and a third segment of sub-data frame, where the inserting module is specifically configured to:
Obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence;
Obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are randomly modulated, and the last two symbols in the second segment of data frame are 1 and 0;
and obtaining the third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence.
Optionally, the framing module is specifically configured to:
performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding;
Combining the head sequence and the tail sequence with the middle data segment to obtain the whole data frame;
and pre-coding the whole data frame to obtain the pre-coded data.
Optionally, the instantaneous frequency of the chirp signal is a linearly increasing frequency.
An embodiment of a third aspect of the present application provides an electronic device, including: the system comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the design method of the detection communication integrated shared waveform.
An embodiment of a fourth aspect of the present application provides a computer-readable storage medium storing computer instructions for causing the computer to execute the method for designing a probe communication integrated shared waveform according to the above embodiment.
Therefore, through reasonable design of the frame structure and the head-to-tail sequence in the data frame, the problem of integral signal spectrum expansion can be effectively solved, and the integral signal spectrum is limited within the original radar bandwidth; by designing the head-tail sequence, compared with a single synchronous head, the signal acquisition and synchronization can be more effectively completed; the initial phase of the tail sequence after precoding and modulation is fixed, and frequency offset and phase offset estimation can be performed by using the head and tail sequence, so that the communication performance is effectively improved; the design of the head-tail sequence enables signals at the head end and the tail end of the integrated signal to be kept in a chirp waveform, so that the detection performance of the integrated signal is ensured; the data frame design of the application limits the integrated waveform bandwidth, improves the communication performance and the detection performance, and has good application prospect and good engineering feasibility.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a flowchart of a design method of a detection communication integrated shared waveform according to an embodiment of the present application;
fig. 2 is a schematic diagram of a frame structure of a probe communication integrated waveform according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a spectral comparison between a sample radar signal, a sample chirp and CPM direct combined signal, and a probe communication integrated signal according to one embodiment of the present application;
FIG. 4 is a schematic diagram of error rate curves of integrated signal of detection communication under different conditions according to an embodiment of the present application;
FIG. 5 is an exemplary schematic diagram of a distance ambiguity function of a sample radar signal and a probe communication integrated signal according to one embodiment of the present application;
fig. 6 is an exemplary diagram of a design apparatus for probe communication integrated shared waveforms according to an embodiment of the present application;
fig. 7 is an exemplary diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
The following describes a design method, apparatus, device and medium of a probe communication integrated shared waveform according to an embodiment of the present application with reference to the accompanying drawings. Aiming at the technical problems that the spectrum expansion of the integrated waveform of detection communication based on chirp signals is serious, the communication performance is deteriorated due to difficult estimation of frequency offset phase deviation and the like in the related art, the application provides a design method of the integrated shared waveform of detection communication, in the method, the problem of the spectrum expansion of the integrated signal can be effectively solved through reasonable design of a frame structure and a head-tail sequence in a data frame, and the spectrum of the integrated signal is limited in the original radar bandwidth; by designing the head-tail sequence, compared with a single synchronous head, the signal acquisition and synchronization can be more effectively completed; the initial phase of the tail sequence after precoding and modulation is fixed, and frequency offset and phase offset estimation can be performed by using the head and tail sequence, so that the communication performance is effectively improved; the design of the head-tail sequence enables signals at the head end and the tail end of the integrated signal to be kept in a chirp waveform, so that the detection performance of the integrated signal is ensured; the data frame design of the application limits the integrated waveform bandwidth, improves the communication performance and the detection performance, and has good application prospect and good engineering feasibility.
Specifically, fig. 1 is a flow chart of a design method of integrated shared waveforms for detection and communication according to an embodiment of the present application.
As shown in fig. 1, the design method of the probe communication integrated shared waveform includes the following steps:
in step S101, the number of symbols carried on a single radar pulse is determined according to the pulse width and the communication symbol rate of the radar signal, and the parameters of the radar signal are calculated.
Optionally, in some embodiments, determining the number of symbols carried on a single radar pulse from the pulse width of the radar signal and the communication symbol rate includes: the number of symbols carried on a single radar pulse is obtained from the product of a preset pulse width and the communication symbol rate of the radar signal.
Specifically, according to the pre-stored radar pulse width T and communication symbol rate R s, the calculation formula of the number N of symbols carried on a single radar pulse is as follows:
N＝Rs×T。
in step S102, the data frame is divided into a plurality of sub-data frames according to the parameters of the radar signal, and a corresponding data sequence is inserted into each sub-data frame.
Optionally, in some embodiments, the multiple segments of sub-data frames include a first segment of sub-data frame, a second segment of sub-data frame, and a third segment of sub-data frame, wherein the data frame is divided into multiple segments of sub-data frames according to parameters of the radar signal, and a corresponding data sequence is inserted into each segment of sub-data frame, including: obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence; obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are modulated randomly, and the last two symbols in the second segment of data frame are 1 and 0; and obtaining a third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence. For example, a data frame is composed of a header sequence, a communication data segment, and a trailer sequence; the lengths k of the head and tail sequences are the same, and the head and tail sequences are calculated according to related parameters; the generation mode of the head sequence is to intercept the first k from the infinitely long sequence taking [1, 0] as a circulation unit; the tail sequence is generated by intercepting the first k from an infinitely long sequence taking [0,1, 0] as a circulating unit; to ensure that the communication error code performance and the initial phase of the tail sequence after modulation are unchanged, the last two symbols of the communication data segment are set to be 1 and 0.
It will be appreciated that the instantaneous frequency of the chirp signal is linearly increasing or decreasing. Taking the example of a chirp signal with linearly increasing instantaneous frequency, the instantaneous frequency is lowest at the head of the signal and highest at the tail of the signal. Thus, the chirp signal takes the lower and upper limits of bandwidth at the head and tail, respectively. After loading the CPM signal into the chirp signal, the fusion signal is most prone to spectrum expansion at the head and tail, so special design of the head and tail sequences of the data frame is required.
The first segment of the data frame is k in length, and the data in the first segment is a specific header sequence;
the second segment of the data frame is N-2k in length, and the first N-2k-2 symbols in the second segment are randomly modulated communication symbols, with the last 2 symbols fixed at 1 and 0.
The third segment of the data frame is k in length and the data in the third segment is a specific tail sequence.
Further, the calculation formula of the head-tail sequence length k is as follows:
k＝max(k0,L)；
wherein k 0 is calculated by parameters of the signal, and L is determined by the signal-to-noise ratio of the signal working environment.
Further, the calculation formula of the parameter k 0 is:
Where N is the number of symbols carried on a single radar pulse, B is the bandwidth of the chirp signal, T is the radar pulse width, To round up operators.
It can be understood that the instantaneous frequency of the modulated signal of the head sequence should be as large as possible, and the instantaneous frequency of the modulated signal of the tail sequence should be as small as possible, so as to achieve the effect of compressing bandwidth; and when continuous phase modulation with correlation length of 2 is adopted, the instantaneous frequency of the modulated all-1 sequence signal is maximum, and the instantaneous frequency of the modulated all-0 sequence signal is minimum. Thus, the head sequence is designed as a sequence that becomes an all 1 sequence after being precoded, and the tail sequence is designed as a sequence that becomes an all 0 sequence after being precoded.
Specifically, the generation mode of the header sequence is to intercept the first k from an infinitely long sequence taking [1, 0] as a circulation unit; the tail sequence is generated by cutting the first k from an infinitely long sequence taking [0,1, 0] as a circulation unit.
In step S103, the coding rate is determined according to the payload communication rate, the number of symbols, the pulse width and the length of the head-tail sequence in the multiple pieces of sub-data required by the user, and the coding is performed based on the coding rate, and the coded data is subjected to row-column interleaving to obtain interleaved data.
Specifically, according to the payload communication rate R b required by the user, the embodiment of the present application may determine that the calculation formula of the encoding rate R k is:
Where N is the number of symbols carried on a single radar pulse, k is the length of the head-to-tail sequence, and T is the radar pulse width.
Polar coding is channel coding that can support any coding rate, and thus is suitable for the scenario of the present application. For example, the embodiment of the application can carry out Polar coding with the code rate of R k on the communication data input by the user, and then interweave the coded data in rows and columns to obtain better anti-interference performance.
In step S104, the interleaved data is framed, and the entire framed data frame is precoded, so as to obtain precoded data.
Optionally, framing the interleaved data, and precoding the entire framed data frame to obtain precoded data, including: performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding; combining the head sequence and the tail sequence with the middle data segment to obtain a whole data frame; and pre-coding the whole data frame to obtain pre-coded data. For example, concatenating the header sequence, the channel encoded interleaved data, the fixed symbols 1 and 0, and the tail sequence; the data as a whole is subjected to improved differential encoding.
It should be appreciated that precoding has two benefits. Firstly, precoding can effectively improve the error code performance of communication; second, precoding can ensure that the initial phase of the tail sequence portion waveform is only related to the length of its previous data frame, and not to the randomly modulated communication symbols.
The precoding mode in the embodiment of the present application may be improved differential coding, and compared with differential coding, the coding mode in the embodiment of the present application may make the range of variation of the initial phase of the tail sequence waveform smaller. When the length of the preceding data frame of the tail sequence is even, the initial phase of the tail sequence is 0.5 pi; when the length of the preceding data frame of the tail sequence is odd, the initial phase is-0.5 pi.
Specifically, the precoding method is as follows:
Where a n denotes original data, b n denotes precoded data, Indicating exclusive OR, by which, by definition, a -1 is 0, n is a natural number.
In step S105, the encoded data is subjected to continuous phase modulation to obtain a continuous phase modulated CPM baseband signal. For example, the application can perform continuous phase modulation with a modulation order of 2, a modulation index of 0.5, and an associated length of 2.
Specifically, the phase expression of the CPM baseband signal is as follows:
Where N is the number of symbols carried on a single radar pulse; t s is the communication symbol time width; i k is a bipolar symbol, and the value range is { + -1 }; q (t) is the integral of the symbol pulse function, expressed as:
in step S106, the CPM baseband signal is frequency-converted using the chirp signal as a carrier wave, and a probe communication integrated signal is generated.
Optionally, in some embodiments, the instantaneous frequency of the chirp signal is a linearly increasing frequency.
Specifically, the complex signal expression of the chirp waveform adopted in the embodiment of the present application is:
SLFM＝Arect(t/T)exp[j(2πfct+πμt2+φ0)]；
Wherein A is the signal amplitude; f c is the carrier frequency; mu is the chirp rate; phi 0 is the initial phase; rect (T/T) is a rectangular window function.
The complex signal expression of the probe communication integrated waveform is:
S＝Arect(t/T)exp[j(2πfct+πμt2+φ0+φ(t,I))]。
Therefore, the main lobe width of the signal power spectrum is reduced by adopting partial response continuous phase modulation, the problem of integral signal spectrum expansion can be effectively solved by reasonably designing a frame structure and a head-tail sequence in a data frame, meanwhile, the effects of compressing a signal frequency band, capturing synchronization and estimating frequency offset and phase offset can be achieved by means of the head sequence and the tail sequence through special design of the frame structure, the communication performance is improved, the detection performance of signals is not deteriorated, and the method has good application prospect. In addition, the specific sequence design of the application enables signals at the head end and the tail end of the integrated signal to be kept in a chirp waveform, so that the detection performance of the integrated signal is kept.
In order to enable those skilled in the art to further understand the design method of the integrated shared waveform for probe communication according to the embodiments of the present application, the following detailed description is provided with reference to specific embodiments.
As shown in fig. 2, fig. 2 is a schematic diagram of a frame structure of a probe communication integrated waveform. Fig. 2 shows a pre-encoded data frame, wherein the length of the header sequence and the tail sequence is 8, the middle communication data segment consists of random symbols and 2 fixed symbols, and the whole communication data segment enters a demodulation module. The fixed symbols are inserted, namely, the error rate of the last two symbols of the communication data segment is higher when the demodulation mode such as Viterbi is adopted, and the last two symbols are discarded to ensure the communication performance; and secondly, the inserted symbols are the last two symbols of the tail sequence circulation unit, so that the initial phase of the modulated tail sequence can be kept fixed.
Further, as shown in fig. 3, fig. 3 is a schematic diagram of spectrum comparison among the sample radar signal, the sample chirp and CPM direct combined signal, and the probe communication integrated signal. For example, when the number of symbols carried on a single radar pulse n=500, the sample radar signal bandwidth b=200 MHz, and the sample radar pulse width t=5 μs, it can be seen that the spectrum of the probe communication integrated signal is limited to the bandwidth of the sample radar signal, and the spectrum leakage is serious in a manner of directly combining chirp and CPM.
Further, as shown in fig. 4, fig. 4 is a schematic diagram of error rate curves of the integrated signal of detection communication under different conditions. As can be seen from fig. 4, the error rate curve for measuring the communication performance is only about 0.5dB worse than the curve under ideal conditions in the presence of frequency offset and phase offset. This shows that the designed head sequence and tail sequence can estimate the frequency offset and phase offset well.
Further, as shown in fig. 5, fig. 5 is an exemplary schematic diagram of a distance blur function of a sample radar signal and a probe communication integrated signal. As can be seen from fig. 5, the distance blur function of the integrated signal still maintains the unimodal characteristic, and the side lobes slightly fluctuate. The phase expression of the head-tail sequence after pre-coding and modulation can be analyzed as follows:
Wherein phi h (t) is the waveform phase of the head sequence; phi t (t) is the waveform phase of the tail sequence; k is the length of the head-tail sequence; t s is the communication symbol time width.
The expression after loading into the chirp signal is:
Wherein S h is a head sequence waveform expression; s t is a tail sequence waveform expression.
From this, it can be seen that the integrated signal of the head-to-tail portion corresponds to the chirp signal being subjected to frequency conversion, and thus the detection performance of the integrated signal is not deteriorated.
According to the design method for the integrated shared waveform of the detection communication, which is provided by the embodiment of the application, the problem of spectrum expansion of the integrated signal can be effectively solved by reasonably designing the frame structure and the head-tail sequence in the data frame, and the spectrum of the integrated signal is limited in the original radar bandwidth; by designing the head-tail sequence, compared with a single synchronous head, the signal acquisition and synchronization can be more effectively completed; the initial phase of the tail sequence after precoding and modulation is fixed, and frequency offset and phase offset estimation can be performed by using the head and tail sequence, so that the communication performance is effectively improved; the design of the head-tail sequence enables signals at the head end and the tail end of the integrated signal to be kept in a chirp waveform, so that the detection performance of the integrated signal is ensured; the data frame design of the application limits the integrated waveform bandwidth, improves the communication performance and the detection performance, and has good application prospect and good engineering feasibility.
Next, a design apparatus for detecting and communicating integrated shared waveforms according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 6 is a block diagram of a design apparatus for integrated shared waveforms for probe communication according to an embodiment of the present application.
As shown in fig. 6, the probe communication integrated shared waveform design apparatus 10 includes: the system comprises an acquisition module 100, an insertion module 200, a channel coding module 300, a framing module 400, a modulation module 500 and a generation module 600.
The acquisition module 100 is configured to determine the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal, and calculate parameters of the radar signal;
The inserting module 200 is configured to divide a data frame into a plurality of segments of sub-data frames according to parameters of a radar signal, and insert a corresponding data sequence into each segment of sub-data frame;
The channel coding module 300 is configured to determine a coding rate according to a payload communication rate, a symbol number, a pulse width, and a head-tail sequence length in multiple pieces of sub-data required by a user, perform coding based on the coding rate, and perform row-column interleaving on the coded data to obtain interleaved data;
The framing module 400 is configured to frame the interleaved data, and precode the entire data frame after framing to obtain precoded data;
The modulation module 500 is configured to perform continuous phase modulation on the encoded data to obtain a continuous phase modulated CPM baseband signal; and
The generating module 600 is configured to perform frequency conversion on the CPM baseband signal with the chirp signal as a carrier, and generate a detection communication integrated signal.
Optionally, the acquiring module 100 is specifically configured to:
The number of symbols carried on a single radar pulse is obtained from the product of a preset pulse width and the communication symbol rate of the radar signal.
Optionally, the multi-segment sub-data frame includes a first segment sub-data frame, a second segment sub-data frame, and a third segment sub-data frame, where the inserting module 200 is specifically configured to:
obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence;
Obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are modulated randomly, and the last two symbols in the second segment of data frame are 1 and 0;
And obtaining a third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence.
Optionally, the framing module 400 is specifically configured to:
performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding;
combining the head sequence and the tail sequence with the middle data segment to obtain a whole data frame;
And pre-coding the whole data frame to obtain pre-coded data.
Alternatively, the instantaneous frequency of the chirp signal is a linearly increasing frequency.
It should be noted that the explanation of the foregoing embodiment of the method for designing a probe communication integrated shared waveform is also applicable to the apparatus for designing a probe communication integrated shared waveform of this embodiment, and will not be repeated here.
According to the design device for the integrated shared waveform of the detection communication, which is provided by the embodiment of the application, the problem of spectrum expansion of the integrated signal can be effectively solved by reasonably designing the frame structure and the head-tail sequence in the data frame, and the spectrum of the integrated signal is limited in the original radar bandwidth; by designing the head-tail sequence, compared with a single synchronous head, the signal acquisition and synchronization can be more effectively completed; the initial phase of the tail sequence after precoding and modulation is fixed, and frequency offset and phase offset estimation can be performed by using the head and tail sequence, so that the communication performance is effectively improved; the design of the head-tail sequence enables signals at the head end and the tail end of the integrated signal to be kept in a chirp waveform, so that the detection performance of the integrated signal is ensured; the data frame design of the application limits the integrated waveform bandwidth, improves the communication performance and the detection performance, and has good application prospect and good engineering feasibility.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
Memory 701, processor 702, and computer programs stored on memory 701 and executable on processor 702.
The processor 702 implements the design method of the probe communication integrated shared waveform provided in the above-described embodiment when executing a program.
Further, the electronic device further includes:
a communication interface 703 for communication between the memory 701 and the processor 702.
Memory 701 for storing a computer program executable on processor 702.
The memory 701 may include a high-speed RAM memory or may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory.
If the memory 701, the processor 702, and the communication interface 703 are implemented independently, the communication interface 703, the memory 701, and the processor 702 may be connected to each other through a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (PERIPHERAL COMPONENT, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 7, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 701, the processor 702, and the communication interface 703 are integrated on a chip, the memory 701, the processor 702, and the communication interface 703 may communicate with each other through internal interfaces.
The processor 702 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an Application SPECIFIC INTEGRATED Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the application.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the probe communication integrated shared waveform design method as described above.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (12)
1. The design method of the integrated shared waveform of the detection communication is characterized by comprising the following steps of:
determining the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal, and calculating the parameters of the radar signal;
dividing a data frame into a plurality of sections of sub-data frames according to parameters of the radar signals, and inserting corresponding data sequences into each section of sub-data frames;
determining a coding rate according to the payload communication rate, the number of symbols, the pulse width and the length of a head sequence and a tail sequence in the multi-segment sub-data required by a user, coding based on the coding rate, and interleaving the coded data in rows and columns to obtain interleaved data;
framing the interleaved data, and precoding the whole framed data frame to obtain precoded data;
performing continuous phase modulation on the coded data to obtain a continuous phase modulation CPM baseband signal; and
And carrying out frequency conversion on the CPM baseband signal by taking the chirp signal as a carrier wave to generate a detection communication integrated signal.
2. The method of claim 1, wherein determining the number of symbols carried on a single radar pulse based on the pulse width and the communication symbol rate of the radar signal comprises:
and obtaining the number of symbols carried on the single radar pulse according to the product of the preset pulse width and the communication symbol rate of the radar signal.
3. The method of claim 1, wherein the plurality of segments of sub-data frames include a first segment of sub-data frame, a second segment of sub-data frame, and a third segment of sub-data frame, wherein the dividing the data frame into the plurality of segments of sub-data frames according to the parameters of the radar signal and inserting the corresponding data sequence in each segment of sub-data frame comprises:
Obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence;
Obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are randomly modulated, and the last two symbols in the second segment of data frame are 1 and 0;
and obtaining the third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence.
4. A method according to claim 3, wherein framing the interleaved data and precoding the entire framed data frame to obtain precoded data comprises:
performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding;
Combining the head sequence and the tail sequence with the middle data segment to obtain the whole data frame;
and pre-coding the whole data frame to obtain the pre-coded data.
5. The method of any one of claims 1-4, wherein the instantaneous frequency of the chirp signal is a linearly increasing frequency.
6. A design apparatus for detecting and communicating an integrated shared waveform, comprising:
The acquisition module is used for determining the number of symbols carried on a single radar pulse according to the pulse width and the communication symbol rate of the radar signal and calculating the parameters of the radar signal;
The inserting module is used for dividing the data frame into a plurality of sections of sub-data frames according to the parameters of the radar signal and inserting a corresponding data sequence into each section of sub-data frame;
The channel coding module is used for determining the coding rate according to the payload communication rate, the number of symbols, the pulse width and the length of the head-tail sequence in the multi-segment sub-data required by the user, coding based on the coding rate, and interleaving the coded data in rows and columns to obtain interleaved data;
the framing module is used for framing the interleaved data and precoding the whole data frame after framing to obtain precoded data;
the modulation module is used for carrying out continuous phase modulation on the coded data to obtain a continuous phase modulation CPM baseband signal; and
And the generation module is used for carrying out frequency conversion on the CPM baseband signal by taking the chirp signal as a carrier wave to generate a detection communication integrated signal.
7. The apparatus of claim 6, wherein the obtaining module is specifically configured to:
and obtaining the number of symbols carried on the single radar pulse according to the product of the preset pulse width and the communication symbol rate of the radar signal.
8. The apparatus of claim 6, wherein the multiple segments of sub-data frames comprise a first segment of sub-data frame, a second segment of sub-data frame, and a third segment of sub-data frame, and wherein the inserting module is specifically configured to:
Obtaining a first segment of sub-data frame according to the first segment of data frame obtained by the parameters and the corresponding header sequence;
Obtaining a second segment of sub-data frame according to the second segment of data frame obtained by the parameters, wherein the front preset symbols in the second segment of data frame are communication symbols which are randomly modulated, and the last two symbols in the second segment of data frame are 1 and 0;
and obtaining the third segment of sub-data frame according to the third segment of data frame obtained by the parameters and the corresponding tail sequence.
9. The apparatus of claim 8, wherein the framing module is specifically configured to:
performing Polar coding and interleaving on the data of the middle data segment to obtain an interleaved data segment after Polar coding;
Combining the head sequence and the tail sequence with the middle data segment to obtain the whole data frame;
and pre-coding the whole data frame to obtain the pre-coded data.
10. The apparatus of any of claims 6-9, wherein the instantaneous frequency of the chirp signal is a linearly increasing frequency.
11. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of designing a probe communication integrated shared waveform as claimed in any one of claims 1 to 5.
12. A computer-readable storage medium having stored thereon a computer program, wherein the program is executed by a processor for realizing the probe communication integrated shared waveform designing method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667108.2A CN114296035B (en) | 2021-12-31 | 2021-12-31 | Design method, device, equipment and medium for integrated shared waveform of detection communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667108.2A CN114296035B (en) | 2021-12-31 | 2021-12-31 | Design method, device, equipment and medium for integrated shared waveform of detection communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114296035A CN114296035A (en) | 2022-04-08 |
| CN114296035B true CN114296035B (en) | 2024-05-28 |
Family
ID=80973817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111667108.2A Active CN114296035B (en) | 2021-12-31 | 2021-12-31 | Design method, device, equipment and medium for integrated shared waveform of detection communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114296035B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001529B (en) * | 2022-04-26 | 2023-09-01 | 清华大学 | Wireless light-oriented communication perception integrated waveform generation method and device |
| CN116073951B (en) * | 2022-12-30 | 2024-07-09 | 中国联合网络通信集团有限公司 | Data transmission method, device and storage medium |
| CN117556246B (en) * | 2024-01-09 | 2024-03-19 | 电信科学技术第五研究所有限公司 | Method for separating single wave signal from carrier mixed signal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889403A (en) * | 2006-06-01 | 2007-01-03 | 西安电子科技大学 | Cognitive radio OFDM frame structure and subcarrier distributing method thereof |
| CN101267418A (en) * | 2007-03-13 | 2008-09-17 | 华为技术有限公司 | Method, device and system for sending and receiving communication system parameters |
| CN101427475A (en) * | 2005-02-09 | 2009-05-06 | 脉冲互联有限公司 | High data rate transmitter and receiver |
| CN101662438A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Wireless communication method, sending method, receiving and decoding method and device |
| CN106411467A (en) * | 2016-09-19 | 2017-02-15 | 深圳市锐能微科技股份有限公司 | Method and device for transmitting and receiving information based on chirp signal |
| CN110535559A (en) * | 2019-08-02 | 2019-12-03 | 武汉大学苏州研究院 | A kind of WiFi external illuminators-based radar reference signal reconstruct method and system |
| CN112363152A (en) * | 2020-11-04 | 2021-02-12 | 北京邮电大学 | Shared waveform design and signal processing method for millimeter wave radar communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11585889B2 (en) * | 2018-07-25 | 2023-02-21 | Qualcomm Incorporated | Methods for radar coexistence |
-
2021
- 2021-12-31 CN CN202111667108.2A patent/CN114296035B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101427475A (en) * | 2005-02-09 | 2009-05-06 | 脉冲互联有限公司 | High data rate transmitter and receiver |
| CN1889403A (en) * | 2006-06-01 | 2007-01-03 | 西安电子科技大学 | Cognitive radio OFDM frame structure and subcarrier distributing method thereof |
| CN101267418A (en) * | 2007-03-13 | 2008-09-17 | 华为技术有限公司 | Method, device and system for sending and receiving communication system parameters |
| CN101662438A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Wireless communication method, sending method, receiving and decoding method and device |
| CN106411467A (en) * | 2016-09-19 | 2017-02-15 | 深圳市锐能微科技股份有限公司 | Method and device for transmitting and receiving information based on chirp signal |
| CN110535559A (en) * | 2019-08-02 | 2019-12-03 | 武汉大学苏州研究院 | A kind of WiFi external illuminators-based radar reference signal reconstruct method and system |
| CN112363152A (en) * | 2020-11-04 | 2021-02-12 | 北京邮电大学 | Shared waveform design and signal processing method for millimeter wave radar communication system |
Non-Patent Citations (1)
| Title |
|---|
| 一种步进MFSK调制的雷达通信共享信号设计方法;王诏丰 等;系统工程与电子技术;20160131;第38卷(第08期);第56-61页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114296035A (en) | 2022-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114296035B (en) | Design method, device, equipment and medium for integrated shared waveform of detection communication | |
| EP2182690A1 (en) | Frequency offset estimation | |
| CN113746770B (en) | Linear frequency modulation communication system and channel estimation method, device, medium and chip thereof | |
| EP3490206B1 (en) | Modulation method, apparatus applicable to ovxdm system and ovxdm system | |
| CN111404853A (en) | Carrier frequency offset estimation method, device and computer storage medium | |
| CN116389212A (en) | ADMM-based low-complexity multi-carrier modulation signal peak-to-average ratio suppression method | |
| US9294324B2 (en) | Signal generator and signal generation method with cyclic prefix generation | |
| US9203656B2 (en) | Receiver and method of estimating frequency response of transmission path by receiver | |
| US20220385510A1 (en) | Ofdm time domain windowing method and apparatus | |
| CN112711045B (en) | Method and device for processing interference in navigation signal | |
| CN114257253B (en) | Broadband IQ imbalance compensation method and device | |
| Ringset et al. | Performance of a filterbank multicarrier (FBMC) physical layer in the WiMAX context | |
| CN110059401B (en) | OFDM system underwater sound channel impulse response reconstruction method | |
| CN104253771A (en) | Multi-parameter joint estimation method and apparatus | |
| CN111918353A (en) | Method and device for measuring adjacent cell signals of mobile terminal | |
| KR102275054B1 (en) | Scheme for transceiving symbol in a filter bank multi carrier system | |
| JP7394217B2 (en) | Link pre-equalization compensation method and device, storage medium, electronic device | |
| CN104901918A (en) | Method for generating OFDM (orthogonal frequency division multiplexing) data sequence based on Chirp signal and synchronization method | |
| CN109639602A (en) | Low complex degree GFDM channel estimation method towards 5G high-speed mobile scene | |
| CN113660183B (en) | Communication method and device | |
| CN110651453B (en) | Data merging method, device and equipment | |
| JP4516505B2 (en) | OFDM receiver | |
| CN111953624A (en) | Echo time delay estimation method and device | |
| GB2598020A (en) | A communication unit for soft-decision demodulation and method therefor | |
| CN112671683B (en) | Signal modulation and demodulation method and system for segmented continuous frequency modulation wave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |