In order to counter serious multi-path effects,short wave communication systems often use multi-tone parallel mode to transmit information,and combined with fast fourier transform(FFT)algorithm,signal modulation and demodulation are performed.The frame period of some communication systems does not meet the orthogonal conditions between carriers.Traditional algo-rithms use truncation of each frame signal to restore the orthogonal conditions of the carriers and then use FFT algorithm for demodulation,which reduces the spatial diversity gain of signals.A parallel demodulation algorithm for multi-tone signals based on parallel interference cancellation strategy is proposed to address the above issues.By constructing an interference cancellation ma-trix,demodulation is achieved without the truncation of signal frame length.Simulation experi-ments have demonstrated the effectiveness of the proposed algorithm.
关键词
短波通信/多音信号/干扰消除/信号处理
Key words
short wave communication/multi-tone signal/interference cancellation/signal process-ing
维普
万方数据