Radar communication waveform design method based on sparse frequency

Abstract

The invention discloses a radar communication waveform design method based on sparse frequency. The method includes the steps that step1, a radar Tag system receives scattering radar echoes, and a power spectral density matching method is adopted for designing sparse frequency radar waveforms for the scattering radar echoes; step2, eigen decomposition is performed on the sequence of the sparse frequency radar waveforms to obtain an eigenvector group, and part of the eigenvector group is used for designing communication waveforms; step3, the communication waveform obtained in the step2 are embedded into the obtained sparse frequency radar waveforms, and obtained hybrid waveforms are sent to a radar receiver. Compared with linear frequency modulation waveforms, the sparse frequency waveforms can widen the occupied space of a frequency band of communication signals, and therefore a higher communication rate can be obtained; meanwhile, communication signal samples are mutually orthogonal and related with the sparse frequency waveforms to some degree, and therefore it can be guaranteed that the error rate and interception rate of the communication signals are low.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a sparse frequency waveform design method for radar embedded communication. Background technique [0002] The main functions of radar are detection, target location and guidance. The composition principle of the communication system and the radar is similar, both include the process of transmitting and receiving electromagnetic waves. Under the premise of sharing resources such as frequency bands and antennas, the same system can realize radar detection and communication functions, which is the concept of radar communication integration. There are three approaches to radar communication integrated waveform design: 1. Modulate communication data on radar waveform; 2. Transform communication signal into radar detection waveform; [0003] The communication system in the general research of radar communication integration is mainly for large-bandwidth data communication between two...

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Problems solved by technology

[0007] In view of this, the present invention aims at the radar embedded communication realized by linear frequency modulation (LFM) pulse, and the embedded communication signal can only use less frequency band resources, thus resulting in less number of communication samples and low communication efficiency, and proposes A Sparse Frequency Waveform Design Method for Radar Embedded Communication

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