Experimental study of coherent accumulation based on sequence shifting and a genetic algorithm.
Experimental study of coherent accumulation based on sequence shifting and a genetic algorithm.
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基于序列转移和遗传算法的相干积累的实验研究。
DOI：
10.1364/ao.56.003824
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发表时间：
2017-05-01
期刊：
影响因子：
1.9
通讯作者：
Liu Y
中科院分区：
文献类型：
--
作者：
Dong H;Li G;Ao M;Yang C;Liu Y
由于外差信号模数转换器的相邻两个采样点之间存在一定的相位差，我们提出了通过不同步长移位采样序列的方法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位步长。通过实验验证了该方法的有效性。结果表明，与随机相位积累方法相比，该方法可以大大提高外差信号的强度。与现有技术相比，我们的方法更容易实现。
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.