Dong Hongzhou, Li Guoqiang, Ao Mingwu, Yang Chunping, Liu Yong
Appl Opt. 2017 May 1;56(13):3824-3830. doi: 10.1364/AO.56.003824.
Because there is a certain phase difference between the two adjacent samples of an analog-to-digital converter for a heterodyne signal, we propose to eliminate the random phases in the coherent accumulation by shifting the sampling sequences with different steps. A genetic algorithm is used to determine the shifting steps of the sequences. An experiment has been conducted to verify the effectiveness of our approach. The results prove that the approach can greatly increase the strength of the heterodyne signal compared with the accumulation with random phases. Our approach is easier to implement in comparison with existing technologies.
由于外差信号的模数转换器的两个相邻样本之间存在一定的相位差，我们建议通过以不同步长移动采样序列来消除相干积累中的随机相位。使用遗传算法来确定序列的移动步长。进行了一项实验以验证我们方法的有效性。结果证明，与随机相位积累相比，该方法可以大大提高外差信号的强度。与现有技术相比，我们的方法更易于实现。
