OFDM receiver signal compensation method

By combining frequency-domain complex-valued neural networks and time-domain causal convolutional networks, the coupling problem of nonlinear distortion and phase noise in low-Earth orbit satellite communication is solved, thereby improving signal quality and system performance.

CN122137709APending Publication Date: 2026-06-02BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Filing Date
2026-03-16
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In low-Earth orbit satellite communications, the nonlinear distortion and phase noise of broadband OFDM signals cause signal quality degradation, which existing processing architectures cannot effectively address in combination, thus affecting the bit error rate performance of the communication link.

Method used

A complex-valued neural network is used for feature enhancement in the frequency domain, and a causal temporal convolutional network is combined with residual compensation in the time domain to construct an end-to-end signal compensation method, which realizes the joint processing of power amplifier nonlinearity and phase noise.

Benefits of technology

It effectively suppresses the coupling error propagation of nonlinear interference and phase noise, improves the signal quality of the OFDM receiver, and enhances the overall system performance.

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Abstract

This application provides a signal compensation method for OFDM receivers, relating to the field of satellite communication technology. The method includes: receiving an OFDM receiver signal; the OFDM receiver signal is a frequency domain resource grid. Feature enhancement is performed on the frequency domain resource grid using a complex-valued neural network to generate a frequency domain compensation amount; the frequency domain compensation amount is superimposed on the frequency domain resource grid to generate an enhanced frequency domain resource grid. The enhanced frequency domain resource grid is transformed into a time-domain sampling sequence. Residual compensation is performed on the time-domain sampling sequence based on a causal temporal convolutional network to output a compensated time-domain sampling sequence; and the compensated time-domain sampling sequence is restored to the frequency domain to output a compensated target resource grid. This method aims to improve the signal quality of the OFDM receiver and thus enhance the overall system performance.
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