Real-time adaptive optical self-interference cancellation system and method based on FPGA and STM32

Abstract

The present invention provides a real-time self-adaptive optical self-interference elimination system and method based on FPGA and STM32, comprising: a baseband real-time transceiver module completes the real-time transmission of baseband OFDM signals; Convert the radio frequency signal of the local communication information; copy the radio frequency signal of the local communication signal as a reference signal, and transmit it through the radio frequency antenna module; the radio frequency antenna module receives the useful radio frequency signal from another communication unit and is close to the transmitting antenna with the receiving antenna The time-varying radio frequency self-interference signal; after the optical self-interference cancellation module receives the useful signal and the self-interference signal, it adjusts the amplitude and phase of the reference signal through the adaptive control module, and the reference The signal and the self-interference signal cancel each other out to obtain the useful signal after the self-interference is eliminated, and convert the useful signal after the self-interference elimination to the baseband and send it to the receiving end.

Description

technical field [0001] The present invention relates to the field of microwave photonics and wireless communication technology, specifically, to a real-time self-adaptive optical self-interference cancellation system and method based on FPGA and STM32, and more specifically, to an in-band full-duplex wireless communication system Real-time adaptive optical self-interference cancellation system based on FPGA and STM32. Background technique [0002] With the rapid development of mobile communication technology, the 5G era of Internet of Everything has arrived. Explosive information exchange puts forward higher requirements on the transmission rate and transmission capacity of wireless communication systems. Since spectrum resources are limited, developing higher frequency bands and larger bandwidths will significantly increase system costs. Therefore, how to make full use of existing spectrum resources and improve spectrum utilization has become an urgent problem to be solved...

AI Technical Summary

Problems solved by technology

However, the execution speed of the algorithm using MATLAB is slow, the adaptability is poor, and it still does not involve real-time two-way communication between different communication units, so it cannot be really applied to the IBFD wireless communication system.

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