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Communication radar signal transmitting and receiving method based on continuous phase modulation and linear frequency modulation

A technology of linear frequency modulation and phase modulation, which is applied in the directions of pilot signal distribution, radio wave reflection/reradiation, phase modulation carrier system, etc. It can solve the problem of low spectrum utilization efficiency, single communication signal transmission function or radar target detection function, etc. question

Active Publication Date: 2021-09-14
HARBIN INST OF TECH
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing communication radar integrated system can only realize the communication signal transmission function or the radar target detection function alone, resulting in low frequency spectrum utilization efficiency, and now provides a communication radar signal based on phase modulation and linear modulation send and receive method

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  • Communication radar signal transmitting and receiving method based on continuous phase modulation and linear frequency modulation
  • Communication radar signal transmitting and receiving method based on continuous phase modulation and linear frequency modulation
  • Communication radar signal transmitting and receiving method based on continuous phase modulation and linear frequency modulation

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specific Embodiment approach 1

[0026] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment, the method for transmitting and receiving communication radar signals based on continuous phase modulation and chirp described in this embodiment, the method includes the following steps:

[0027] Step 1, respectively modulating the original data of each user and the target pilot sequence to obtain the modulated data of each user and target;

[0028] Step 2. According to the modulated data obtained in step 1, perform power allocation to all users and targets, and obtain the power P of each user k and the target power P T ;

[0029] Step 3. According to the power of each user and target, respectively obtain the baseband waveform signals formed by each user and target in the form of pulses, and each baseband waveform signal is loaded on a chirp carrier signal to form a transmission signal, and use the antenna to transmit Going out, the sending signal of the target is a dynamic ...

specific Embodiment approach 2

[0043] Specific embodiment two: this embodiment is the method for transmitting and receiving communication radar signals based on continuous phase modulation and linear frequency modulation described in specific embodiment one. In step 1, the modulated data of each user and target are obtained. The specific process is:

[0044]Each user's original data and target pilot sequence are mapped into mapping data through MASK, and each mapping data is phase-modulated by CPM to obtain the phase information of each user and target. According to the phase information of each user and target Get the modulated data of each user and target.

[0045] In this embodiment, figure 2 The CPM-BF-LFM signal spectrum is given, where BF means multi-beam, referring to static beam and dynamic beam; MASK is multi-ary amplitude shift keying, BPSK is binary phase keying, CPM is continuous phase modulation, and LFM is linear FM carrier, it can be seen that the signal spectrum is related to the modulatio...

specific Embodiment approach 3

[0048] Specific embodiment three: This embodiment is the method for transmitting and receiving communication radar signals based on continuous phase modulation and chirp described in specific embodiment one. In step 4, the base station receiver obtains the position and location of the target according to the echo signal. The specific process of speed is:

[0049] If the echo intensity of the echo signal is higher than the threshold, it is determined that the target exists, and the echo signal and the chirp carrier signal are multiplied and processed by the base station low-pass filter to obtain the difference frequency signal of the rising edge and the falling edge The difference frequency signal of the rising edge and the difference frequency signal of the falling edge are respectively extracted from the difference frequency signal of the rising edge and the difference frequency of the falling edge, and the target time delay and Doppler frequency are estimated, and then obtain...

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Abstract

The invention discloses a communication radar signal transceiving method based on continuous phase modulation and linear frequency modulation, and belongs to the field of signal modulation. The invention aims to solve the problem of low spectrum utilization efficiency caused by the fact that the existing communication radar integrated system can only realize a communication signal transmission function or a radar target detection function singly. According to the invention, traditional continuous phase modulation, beam forming and linear frequency modulation signals are combined, information of the user can be extracted at a user side by using a multi-antenna beam forming scheme under the condition of considering the existence of interference, and meanwhile, time delay and Doppler information can be extracted at a base station side by processing echoes, estimation of the target angle, distance and speed is realized, and multi-user data transmission and target detection are completed. The method is used for simultaneously realizing a communication signal transmission function and a radar target detection function.

Description

technical field [0001] The invention relates to a communication radar integrated signal sending and receiving method, which belongs to the field of signal modulation. Background technique [0002] The communication-radar integrated system depends on the high-quality communication and radar fusion design, so the design of the communication-radar integrated signal becomes one of the key issues. However, the existing communication radar integrated system can only realize the communication signal transmission function or the radar target detection function, and cannot realize the communication signal transmission function and the radar target detection function at the same time, resulting in the problem of low spectrum utilization efficiency. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing communication radar integrated system can only realize the communication signal transmission function or the radar target de...

Claims

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Application Information

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IPC IPC(8): H04L5/00G01S13/86H04B7/0426H04B7/0456H04L27/20
CPCH04L5/0048H04L27/20G01S13/86H04B7/043H04B7/0456
Inventor 曹宇于启月刘冠辰林泓池
Owner HARBIN INST OF TECH
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