An integrated method of mimo radar communication based on antenna array modulation

Abstract

The invention discloses an MIMO radar communication integration method based on antenna array arrangement modulation, and belongs to the technical field of radar and communication. The method comprises the steps that firstly, a reference dictionary is constructed and a constellation diagram is designed according to an MIMO radar system; phase rotation is performed on the transmitting waveform at atransmitting terminal, and the constellation diagram is updated; then a binary communication data flow to be transmitted is divided into a plurality of code elements, and an array element-waveform paring mode corresponding to each code element is found out; finally, a radar transmitting terminal adjusts the transmitting array structure through changing the state of a radio frequency switch and transmits the corresponding radar pulse waveform; a radar receiving terminal processes the radar echo and realizes target detection; a communication receiving terminal processes a radar pulse signal andobtains an estimated value of an ordered steering vector of the radar transmitting array; constellation points in the constellation diagram are traversed to find out a constellation point which is the closest to the estimated value of the ordered steering vector, and binary information is demodulated. The MIMO radar communication integration method realizes downlink transmission of communication,significantly improves the data transmission rate, reduces the communication error rate and enhances the system reliability.

Description

technical field [0001] The invention belongs to the technical field of radar and communication, and in particular relates to an antenna array modulation-based MIMO radar communication integration method. Background technique [0002] For a long time, radar and communication have been studied as two independent systems due to differences in processing mechanisms. The two have a large overlap in frequency spectrum, so they regard each other as interference and suppress each other. [0003] Various commercial communication devices have exponentially increased demand for radio frequency spectrum resources, and radars continue to lose spectrum to the civilian field but still maintain normal functions. For example, existing radar systems can be deployed in the radio frequency spectrum between 0.3 and 100 GHz according to their type and usage, and within this range, many frequency bands are very suitable for international mobile communications, such as the 700 to 3600 MHz band is w...

AI Technical Summary

Problems solved by technology

However, the biggest problem in the integrated design of radar communication is: how to eliminate mutual interference while sharing spectrum and resources

The coexistence of MIMO radar and communication can not only be achieved through the above-mentioned waveform diversity, but also can make full use of the spatial freedom endowed by the antenna array structure, which has not been found in the current literature.

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