基于Cha的思想,提出了一种广义的扩张具有零(低)相关区二元序列数量的方法,这种方法通过牺牲已知的具有零(低)相关区的二元序列的零(低)相关区宽度来换取序列数量的扩大。为这种方法建立了系统的理论基础,并给出严格的证明。这种方法能满足近似同步CDMA(AS-CDMA)系统对大用户量的需求。 Based on the idea of ​​Cha, a generalized method of expanding the number of binary sequences with zero (low) correlation regions is proposed. By means of the zero (low) correlation of binary sequences with known zero (low) correlation regions, Relevant area width in exchange for the expansion of the number of sequences. For this method to establish the theoretical basis of the system, and gives a rigorous proof. This method can meet the needs of a large amount of users for an approximate synchronous CDMA (AS-CDMA) system.