华为CDMA2000采用的Walsh码技术

Walsh码 不同的Walsh码之间是正交的。 Walsh码是一种正交扩频码 Wim 代表阶数为m的Walsh矩阵中的i行。 CDMA 核心技术 W 2n = W n W n W n W n W 1 =0 W 2 = 0 0 0 1 W 4 = 0 0 0 0 0 1 0 1 0 0 1 1 0 1 1 0 Walsh code Orthogonal codes are easily generated by starting with a seed of 0, repeating the 0 horizontally and vertically, and then complementing the 1 diagonally. This process is to be continued with the newly generated block until the desired codes with the proper length are generated. Sequences created in this way are referred as “Walsh” code. The Walsh code is used to separate the user in the forward CDMA link. In any given sector, each forward code channel is assigned a distinct Walsh code.