论文部分内容阅读
提出了一种能够抑制多径干扰的基带波形设计方法,该方法是通过保持传输信息速率不变,在成形滤波器第二个零点叠加信号来实现的。以多进制相位调制方式采用这种波形结构进行了仿真实验和湖水试验,都获得了比传统的波形结构更低的误码率。试验结果表明该波形设计方法能够提高水下通信系统的性能,能够有效抑制水下信道的多径干扰,能够提高水下通信的作用距离和可靠性。
A baseband waveform design method that can suppress multipath interference is proposed. The method is achieved by keeping the transmission information rate constant and superimposing the signal at the second zero point of the shaping filter. The simulation experiment and the lake experiment were carried out by using this waveform structure in the multi-phase phase modulation method, and all achieved a lower bit error rate than the traditional waveform structure. The experimental results show that this method can improve the performance of underwater communication system, suppress the multipath interference of underwater channel, and improve the distance and reliability of underwater communication.