IEEE802.11b中补码键控技术

Complementary code keying in IEEE std 802.11b

目的研究一种高速直接序列扩频方法———补码键控调制方式CCK(ComplementaryCode Keying)。方法首先介绍补码序列的定义、性质、产生方法以及使用多相补码的CCK调制解调的实现,然后以传输速率11 Mbps时的补码序列为例,使用Matlab软件对CCK调制的编码增益进行仿真分析。结果 CCK调制不仅能为系统带来处理增益,同时可以为系统带来一定编码增益,并且具有较高的频谱利用率。结论 CCK调制是一种理想的调制方式,已被广泛地应用于无线通信系统中。

Aim To investigate CCK（Complementary Code Keying）,a high-speed Direct Sequence Spread Spectrum method.Methods After introducing the definition,properties and methods of production of complementary sequence and implementation of CCK modulation employed multiphase complementary code,the coding gain of CCK with Matlab was simulated and analyzed by taking the complementary sequence which is transmitted at 11 Mbps as example.Results CCK modulation possesses high frequency spectrum efficiency in addition to making the system achieve coding gain and processing gain.Conclusion CCK modulation,one of the ideal modulation methods,has been widely used in wireless communication system.