【摘要】 介绍了补码键控(CCK)调制解调原理和CCK解调中核心的快速沃尔什变换(FWT)算法.针对802.11b中的具体应用,对FWT块做了改进,减少了运算次数;运用一种分步计算结构进行运算,节省了近一半的电路.通过比较可以发现,在11 Mbps的传输速度下,采用改进的快速沃尔什模块的分步计算结构能显著减少运算量和电路规模.更多还原

【Abstract】 The principle of CCK(complementary code keying) and the key algorithm-FWB-in the demodulating process is presented.The modified FW(fast Walsh) algorithm is introduced for the communication with data rate of 11 Mbps.The modified FW,together with a bi-stage correlation calculation process using fast Walsh block,significantly reduces the computational complexity and hardware consumption.更多还原