Time-frequency joint synchronization method of LFM-MPSK radar communication integrated system and device thereof

Abstract

The invention discloses a time-frequency joint synchronization method for an LFM-MPSK radar communication integrated system and a device thereof, and belongs to the field of radar communication, and the method comprises the steps: S1, transmitting an integrated waveform carrying a synchronous carrier and an information carrier with opposite frequency modulation slopes; S2, estimating respective starting and ending positions of positive and negative frequency modulation slope synchronous carriers by using the obtained receiving signals; S3, setting a plurality of positive and negative frequency modulation reference signals at different time starting points based on the starting position; S4, mixing the positive and negative frequency modulation reference signals with the received signals of the corresponding time windows to obtain positive and negative frequency mixing signals; estimating respective spectrum peak frequencies of the positive and negative frequency mixing signals; and S5, inverting synchronous time delay and carrier frequency offset by using the two groups of spectrum peak frequencies; and performing synchronous compensation on the received signal by using the synchronous time delay and the carrier frequency offset so as to demodulate the information carrier in the received signal. According to the method provided by the invention, the time-frequency joint synchronization of the integrated signal can be realized under the condition that the communication efficiency and the radar performance are not influenced.

Description

technical field [0001] The invention belongs to the field of radar communication, and more specifically relates to a time-frequency joint synchronization method and device of an LFM-MPSK radar communication integrated system. Background technique [0002] With the continuous development of electronic technology and the continuous improvement of military combat requirements, the electronic equipment loaded on combat platforms is also increasing, and multi-functional and multi-task electronic systems have become a development trend. Although the simple integration of multiple electronic systems can realize a multifunctional electronic system, it will increase the radar cross section (RCS) of the combat platform, causing problems such as electromagnetic compatibility, scheduling difficulties, and system performance degradation. Therefore, achieving a higher degree of integration and integration of different functional devices and building a multifunctional integrated radio freq...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a time-frequency joint synchronization method and device for an LFM-MPSK radar communication integrated system, the purpose of which is to better realize radar communication synchronization and improve the integrated radar system The level of integration, thus solving the technical problems of poor communication synchronization effect and low integration level of the existing radar system

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