利用沃尔什( Walsh) 序列现有的性质，推导并证明了 L × L 阶完备 Walsh 序列组的新性质，即组中任意三条或四条序列均存在 L/4 列的列同性．依据序列的列同性又推导出完备 Walsh 序列组中四条序列列同性的二进制 Walsh 编号之和为0，以及三条序列等幅叠加生成序列正交映射后与组中序列部分正交的推论．仿真结果验证了完备 Walsh 序列组中叠加生成序列与原序列组中序列的部分相关性．最后，将叠加序列的部分相关性应用于并行组合扩频通信系统中，简要介绍了在并行组合扩频通信系统 QPSK 调制中使用完备 Walsh 序列组来实现接收解调的软判决．

 Based on the present properties of Walsh sequences,a new property of an L × L- order complete Walsh sequence set is derived,i.e.there exists sequence identity of L/4 columns of arbitrary three or four sequences.According to this property,it is deduced that the sum of binary Walsh numbers in the identical columns of four sequences is zero,and that,the mapping sequences of three superposition sequences are orthogonal to a certain number of sequences in the sequence set.Moreover,the partial correlation between the superposition sequences and the original sequences is verified by simulations and is applied to a parallel combinatory spread spectrum communication system.Finally,the soft decision for QPSK modulation of the spread spectrum system is briefly analyzed.