The parallel combinatorial spread spectrum provides high spectral efficiency and the data rate of the parallel combinatorial spread spectrum is higher than that of the direct sequence spread spectrum . this thesis studies on the mapping between data and spread sequence in the parallel combinatorial spread spectrum system and presents a mapping method based on the lexicographic order . the mapping method resolves the many to one mapping problem of the past method 本文研究了并行组合扩频中数据和扩频序列之间的映射方法，指出了已有的一种不定方程求解算法中存在的映射不唯一问题，应用组合数学中的相关理论，将映射问题转化为厂组合问题，提出了基于字典顺序的并行组合扩频数据映射算法，该算法具有普遍性，解决了原有算法中的多一映射问题。
