说明：  matlab中实现信号序列精确时延的程序（完善版，适用于仿真数据很长时），主要解决了之前那个程序可能出现的内存不足的问题
(matlab program of accurate delay of the signal sequence (perfect version, applicable to the simulation data is very long), that the program may appear before the main solution to the problem of insufficient memory)