Radar communication integrated signal generating and receiving method based on random step frequency OFDM (Orthogonal Frequency Division Multiplexing)

Abstract

The invention discloses a radar communication integrated signal generating and receiving method based on random step frequency OFDM (Orthogonal Frequency Division Multiplexing). The radar communication integrated signal generating and receiving method comprises the following steps: generating a radar communication integrated signal; modulating the step frequency number of each pulse in each symbol of a first pulse; modulating user information to be communicated in a corresponding symbol of the second pulse; modulating the communication information in the third to last pulses; performing up-conversion on the baseband signal of each pulse according to the stepping frequency number, and sending the signal; receiving a radar communication integrated signal; performing down-conversion and demodulation on the first pulse to obtain the step frequency number of each pulse; performing down-conversion on the second pulse according to the stepping frequency number, and demodulating to obtain user information; and performing down-conversion on the third to last pulses according to the stepping frequency number, and performing demodulation to obtain communication information. According to the invention, one-point-to-multipoint communication in a radar communication integrated system can be realized, and confidential communication in a special system is realized by using the random step frequency of each pulse.

Description

technical field [0001] The invention belongs to the technical field of radar communication integration, and in particular relates to a radar communication integration signal generation and communication receiving method based on random step frequency OFDM. Background technique [0002] The Integration of Radar and Communications (IRC) system realizes radar detection and wireless communication functions at the transmitter and receiver, and has great advantages, such as improving spectrum utilization and spectrum resource utilization, and has become a research hotspot in recent years. The radar communication integrated system is widely used in wireless radar sensor network, indoor positioning and activity recognition, drone monitoring and vehicle networking and other systems. The integrated radar communication system usually uses pulsed communication signals to simultaneously realize detection and communication functions. [0003] Orthogonal Frequency Division Modulation (OFD...

AI Technical Summary

Problems solved by technology

In the integrated airborne radar communication system, a signal transmission technology is needed to realize one-to-multipoint and confidential communication, and the existing technology cannot meet these requirements

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