摘要
针对Nakagam i/lognorm al复合衰落信道,研究了层叠分布式天线系统(Cascade D istributed Anten-na System-CDAS)在CDMA网络中的平均误符号率性能.推导出了采用混合SC/MRC分集接收机的层叠分布式天线系统平均误符号率性能公式.利用推导出的平均误符号率表达式,分析了多径密度函数(M ultipath IntensityProfile-M IP)衰减因子、空时分集维数、活动用户数以及阴影衰落因子对平均误符号率性能的影响.仿真表明层叠分布式天线系统可以有效对抗衰落,提高系统容量以及削弱对数正态阴影衰落的影响.
A general SER performance analysis framework of Cascade Distributed Antenna System (CDAS) in CDMA system with hybrid SC/MRC diversity receiver is presented. The channel model assumes frequency-selective channel with Nakagami/iognormal composite fading statistics, With the derived general SER formula, the influences of Multipath Intensity Profile (MIP)'s decaying factor, spatial and temporal diversity order, number of user and the shadowing factor are analyzed. Numerical results show that the CDAS can effectively combat fading, and improve the system capacity. It can also impair the impact of lognorrnal shadowing fading,
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第4期599-604,共6页
Acta Electronica Sinica
基金
国家自然科学基金(No.60472052No.10577007)
国家863高科技研究发展计划(No.2005AA123820)
教育部"新世纪优秀人才支持计划"(2004年)