中文说明：
伪随机码生成代码，包括m序列，gold序列，kasami序列，以及寻找m序列优选对和计算自相关和互相关的功能。
English Description：
Pseudo random code generation code, including m sequence, gold sequence, Kasami sequence, as well as the function of finding m sequence preferred pair and calculating autocorrelation and cross-correlation.