The emphases of this thesis are to implement the ss baseband communication system and to achieve behavior simulation and post - place & route simulation respectively on the platform of ise 4 本论文工作的重点是在ise4开发平台上具体实现这个扩频系统，并对系统中的每个模块和整个系统进行相应的功能仿真和时序时延仿真。
