摘要
分析了CDMA系统在不同工作模式(双工方式、信道关系和射频带宽)下的特性,进而分析了IS95采用的扩频、抗多径效应、严格功率控制和负荷平衡控制等一系列系统技术.结果表明,IS95在其选定的工作模式下是一个优化系统,但只是一个局部优化的CDMA系统.IS95系统应用扩频技术获得了目前所有移动多址系统的最高容量,但为了降低多址干扰而使技术复杂性、系统成本均有所增加,且系统的实际容量只达到设计值的 1/3强.CDMA还有其他工作模式尚待发掘.
Through the analysis of IS95 technology architecture, it is pointed out that IS95 system is an optimized system under specific working mode but not the best system for overall situation. As for CDMA technology itself, the working mode and the corresponding technology architecture of IS95 system is not the best solution to realize CDMA technology. Based on the summary of the general features of CDMA system, several aspects for CDMA to progress further are presented in this paper.
出处
《现代电信科技》
1999年第3期10-14,共5页
Modern Science & Technology of Telecommunications
