【摘要】 针对低压电力线载波信道传输特性不稳且存在很强的有色干扰等特点,提出了一种反相重传差错控制方案。在各次传输期间的噪声正相关的条件下,本方案可使各次重传的信号成分相互增强,噪声成分相互抵消。从而提高解调器的输入信噪比,降低误码率。理论分析和仿真结果证明通过增加重传次数可有效抑制低信噪比条件下的残余差错率。更多还原

【Abstract】 An algorithm of phase inversion re-transmitting error controlling is presented.The algorithm mitigates the noise with noises and boosts up signal with signals under certain conditions.As a result,the inputting SNR of demodulator can be enhanced and the error rate can be reduced.The theory analysis and the simulation results show that the algorithm can restrain the error rate by increasing the times of re-transmitting,thus,it could be applied to the communication systems suffering horrible channels but requiring high date safety,such as low voltage power line communication system.更多还原