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介绍了一种二维离散正交型Ｗａｌｓｈ 函数的构成与相关特性，将离散的Ｗａｌｓｈ函数进行平滑化之后，应用在广带域码分多址扩散频谱通讯中（ 简称ＣＤＭＡ 扩谱通讯） ．本文还发表了一种码分多址扩谱通讯的结构框图和通过各种复杂环境通讯实验结果．对比实验结果表明，平滑化的离散正交型Ｗａｌｓｈ 函数与非平滑化的离散正交型Ｗａｌｓｈ 函数作为在扩谱码，信号频带宽度之比为１：２， 用Ｗａｌｓｈ 函数（ 哈德码序列） 的正交码，目的是各种信道之间的相互干扰达到最小化．平滑化技术在同等的条件下，信噪比提高了２０ ｄＢ以上．说明这是一种非常成功的理论方法．
This paper introduces the structure and related characteristics of Walsh function with two-dimensional discrete orthogonal type. After the discrete Walsh function is smoothed, it is used in Wideband Code Division Multiple Access spread spectrum communication (CDMA spread spectrum communication). This paper also published a block diagram of CDMA spread spectrum communication and experimental results through a variety of complex environment communication. The experimental results show that the Walsh function and the Walsh function (Hadamard sequence) of smoothing discrete Walsh function and non-smoothed discrete orthogonal Walsh function are 1: 2, Of the orthogonal code, the purpose is to minimize the mutual interference between various channels. Smoothing technology under the same conditions, the signal to noise ratio increased more than 20 dB. This shows that this is a very successful theoretical method.