System and method for transmitting terahertz radar signal based on digital pre-distortion
A digital pre-distortion and radar signal technology, applied in the field of communication, can solve the problems of small non-linear compensation range of signals and difficulty in wide application, and achieve the effects of improving accuracy, increasing effective bandwidth, and overcoming the low bandwidth of processing digital baseband signals
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[0058] The present invention will be further described below in conjunction with the accompanying drawings.
[0059] Refer to attached figure 1 , the system of the present invention includes a radar signal generation module, a clock control module, a digital predistortion module, a digital up-conversion module, a digital-to-analog conversion module, a frequency mixing module, a terahertz frequency doubling power amplification module and a radar antenna, and each module is sequentially connected by a bus . in:
[0060] The radar signal generation module mainly generates a baseband digital chirp signal by a frequency source DDS signal generator, and the baseband digital chirp signal undergoes digital-to-analog conversion and frequency multiplication to obtain a local oscillator signal with a center frequency of 20GHz.
[0061] In the clock control module, a certain value of clock cycle is designed in the FPGA chip according to the needs, and the input and output of control dat...
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