Method for integrating OFDM radar communication signals

A communication signal and radar signal technology, applied in the field of signal detection and communication, can solve the problems of reduced radar detection performance, reduced radar performance, interference, etc.

Active Publication Date: 2017-08-22
XIDIAN UNIV
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Problems solved by technology

If the bandwidth of the communication subsystem is deliberately designed to be as large as that of the radar subsystem, this will cause loss of communication signals
If the bandwidth of the radar is deliberately designed to be as low as the communication, it will lead to a decrease in the performance of the radar
[0003] In summary, the existing problems in the prior art are: the current peak-to-average ratio of the OFDM integrated signal of multi-phase encoding is too high and the radar main side lobe ratio i

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  • Method for integrating OFDM radar communication signals
  • Method for integrating OFDM radar communication signals
  • Method for integrating OFDM radar communication signals

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[0051] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0052] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] The RCI signal proposed by the present invention inserts the communication data sequence into different orthogonal carriers. Such as figure 1 As shown, the RCI signal can be simply generated by the IFFT module. The algorithm selection and mapping module is used to increase the bandwidth of the RCI system, which will be explained in detail in the following chapters. The newly added cyclic shift module is used to improve the radar performance of the RCI system, and the impact o...

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Abstract

The invention belongs to the technical field of signal detection communication and discloses a method for integrating OFDM radar communication signals. Communication signals are embedded into each subcarrier in OFDM radar signals, thereby integrating the communication radar signals. The radar performance and communication performance are adjustable in a multi-phase coding mode. Through combination of a gray code technology and a sequence cyclic shift technology, a peak-to-average ratio and a main lobe and side lobe ratio of an integrated signal are reduced at the same time. According to the method, the communication signals are embedded into each subcarrier in the OFDM radar signals, thereby integrating the communication radar signals; the radar performance and communication performance are flexibly adjustable in the multi-phase coding mode; and for the problem that the peak-to-average ratio and the radar main lobe and side lobe ratio of the OFDM integrated signal based on multi-phase coding are relatively high, the peak-to-average ratio and the main lobe and side lobe ratio of the integrated signal are reduced at the same time through combination of the gray code technology and the sequence cyclic shift technology.

Description

technical field [0001] The invention belongs to the technical field of signal detection communication, and in particular relates to a method for realizing the integration of OFDM radar communication signals. Background technique [0002] Multi-carrier, especially Orthogonal Frequency Division Multiplexing (OFDM) technology is also widely used in integrated waveform design. Compared with the single-carrier system, the OFDM system has been widely used in RCI system design because of its high spectral efficiency, good anti-multipath ability and no Doppler effect. In order to reduce the peak-to-average ratio of OFDM-based systems, the most common method is to design different subcarrier weights and use window functions to limit the amplitude. But these methods are a kind of lossy clipping, and the signal cannot be recovered after clipping. This is unacceptable for integrated communication signals. In addition, after the conventional method reduces the peak-to-average ratio of...

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Application Information

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IPC IPC(8): H04L27/26G01S7/02
CPCG01S7/02G01S7/023H04L27/2615
Inventor 张华李聪许录平杨玉程鹏飞赵闻博张洪阳陈俊如刘立王光敏孙景荣
Owner XIDIAN UNIV
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