Design method of radar communication integrated signal

Abstract

The invention relates to a design method of a radar communication integrated signal. Digitalized communication information is distributed to each sub-carrier by serial-parallel conversion and is used for modulating a displacement condition relative to an original sequence of a phase encoding sequence on each sub-carrier. The system adopts a comprehensive radio frequency front end, and radar and communication signals adopt different signal processing systems, so that a corresponding function is finished. According to the technical scheme, communication data is used for controlling phase encoding displacement of the sub-carriers and efficient communication transmission is realized by a soft spread spectrum manner; a better radar detection performance is guaranteed through the random displacement of the phase encoding sequence with good period self-correlation.

Description

technical field [0001] The invention belongs to the field of radar communication, and in particular relates to a waveform design method of a radar communication integrated signal. The integrated signal not only effectively contains communication information, but also can realize the purpose of radar detection. Background technique [0002] In the background of modern information warfare, the weapon platform equipped in the war has developed from single to comprehensive, and the combat platform is equipped with a large number of electromagnetic equipment. However, too much equipment also brings a certain burden to the combat platform, which affects the comprehensive combat effectiveness and countermeasures of the platform. Therefore, it is urgent and extremely realistic to explore the integrated design of different electronic information systems on the combat platform. [0003] In modern combat platforms, radar and communication equipment play an indispensable role as the mos...

AI Technical Summary

Problems solved by technology

One is that the radar and communication signals are independently generated, and are superimposed and synthesized at the transmitting end, separated at the time of reception, and the required signal is extracted. Usually, the radar and communication signals are subjected to spread spectrum processing to ensure orthogonality. According to the blind source theory However, the blind source separation algorithm either needs a certain signal as a reference, or needs multiple receiving channels to receive at the same time, so it is difficult to realize the simultaneous existence of time delay and Doppler frequency shift in the integrated radar communication system. Single-channel separation of radar and communication signals

The second way uses the modulation of communication data on the radar waveform to generate an integrated signal, such as using up and down frequency modulation of the chirp waveform or different pulse repetition frequencies to represent digitally encoded communication information symbols, but the existing design often communicates The efficiency is low and cannot meet the requirements of high-speed communication; the third is the integrated signal design based on the communication waveform, which mainly focuses on the existing Orthogonal Frequency Division Multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) which is maturely applied in the communication system ) waveform or other multi-carrier frequency waveforms applied to the research of radar detection

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