Signal processing method for broadband quadrature chirping multiplex radar communication integrated waveform

Abstract

The invention discloses a signal processing method for a broadband quadrature chirping multiplex radar communication integrated waveform. A digital signal is converted into an analog signal accordingto a processing bandwidth of the digital signal generated by modulation of the integrated waveform, wherein the processing bandwidth of the digital signal is determined by a digital baseband signal generated by communication data of the integrated waveform; orthogonal up-conversion is performed on the analog signal and a broadband chirp signal, after a radio frequency signal is received, and the radio frequency signal is sent to a target; a receiving signal of the radio frequency signal reflected by the target is received; receive the signal; and after the orthogonal up-conversion is performedon the receiving signal and the broadband chirp signal, analog-digital transformation is performed, and after the digital baseband signal is generated, two-dimensional arrangement and compensation correction are performed on the digital baseband signal to obtain a to-be-decoupled matrix; and cyclic correction and decoupling is performed on the to-be-decoupled matrix to obtain distance informationof the target. Compared with the prior art, the method of the invention enables the broadband radar communication integrated waveform to achieve range resolution of a broadband signal under a narrower digital bandwidth.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a signal processing method of broadband orthogonal chirp multiplexing radar communication integrated waveform. Background technique [0002] The development trend of the Internet of Things is to connect large-scale heterogeneous sensor terminals with wireless communication networks, so as to realize the Internet of Things. In addition to the real-time perception of the surrounding environment, IoT terminals also have the ability to communicate. Driven by such demands, integrated radar communication technology has become a solution with obvious advantages. The original idea of ​​integrated waveform research is mainly to improve the traditional radar waveform, such as chirp signal modulation with positive and negative slopes, and the combination of chirp and phase modulation signal (PSK, MSK). This kind of processing algorithm is relatively mature, but its dis...

AI Technical Summary

Problems solved by technology

The original idea of ​​integrated waveform research is mainly to improve the traditional radar waveform, such as chirp signal modulation with positive and negative slopes, and the combination of chirp and phase modulation signal (PSK, MSK). This kind of processing algorithm is relatively mature, but its disadvantage is that the system Low frequency band utilization and low communication data rate

However, for the OFDM integrated waveform, the baseband bandwidth will also be increased while increasing the RF bandwidth, which will bring huge pressure to the AD / DA and subsequent signal processing hardware circuits, resulting in the use of the OFDM integrated waveform for signal processing. The distance measurement does not yet have the accuracy of broadband signals

Images