| 1. | For wireless communications , direct sequence code division multiple access ( ds - cdma ) techniques have received a great deal of attention due to the expectation of capacity increase , interference rejection capability , security , and so on . in a high data rate application such as multimedia services , however , the capacity of ds - cdma systems is limited by both the inter - chip , or inter - symbol interference
Cdma技术以其高抗干扰能力、高容量、高保密性等技术优势在第三代移动通信系统中被广泛应用，然而在高速数据业务中，严重的码间干扰和符号间干扰会导致系统性能明显下降。 |
