利用多点采样方法恢复二进制信号

Using Multi-Sampling Method to Recover Binary Signals

提出了一种从经过高斯信道传输的基带信号、FSK、PSK信号中正确的恢复原二进制码序列的新方法。与传统方法不同,该方法是采用在一个码宽内对信号进行多次采样,如果采样值大于门限值则把该采样值记为‘1’,反之记为0’。然后根据每个码宽内‘1’的个数确定该码是‘1’还是‘0’。理论分析和大量仿真实验结果均表明:该方法简单,效果显著,能有效抑制干扰和噪声。利用该方法关键是可以知道恢复出来的每个二进制码位产生误码的可能性大小,因而该方法还可以和其它信道编码方式结合,具有很大的发展潜力。

In this paper, we propose a new method for recovering binary code sequences from base-band, FSK or PSK signals transmitted through Gaussian noise channel. Differing from the traditional method, the new method adopts multi-sampling in every code width. When sampling, if the value of the signal at the sampling point is greater than the threshold, then we denote it as‘1’, otherwise we denote it as‘0’According to the number of‘1’within every code width, we can decide whether this code is‘1＇or‘0＇. Theoretical analysis and lots of simulation show that this method is easy to be used and is highly efficient. Using this new method, we can know the probability of bit error for every code, so this method can be combined with other channel coding methods. It has great potential to be further developed.