摘要
考虑存在来自其他蜂窝的不同功率同信道干扰的多用户上行链路,分析了多天线基站采用多用户调度和最大比合并接收时的系统性能。在期望信号和干扰信号分别经历Nakgami-m和Rayleigh衰落时,运用基于概率密度函数的性能分析法推导了系统中断概率的闭合表达式。仿真结论显示,系统中断概率的解析曲线与数值仿真结果一致,系统性能随着天线数和用户数的增大而提升,多天线和多用户分集增益明显,干扰功率有较大差异时系统中断概率性能有所下降。
The performance of the multiple-antenna system with maximal ratio combining （MRC） and muhiuser scheduling is studied in the muhiuser uplink in the presence of unequal power cochannel interferences （CCI） from other cells. The channels of useful and interference signals are assumed to be Nakgami-m and Rayleigh fading. The closed form expression for outage probability of system is derived by using performance analysis method based on probability density function. Simulation results show that, the analytical curves of the derived expressions match well with the numerical simulations, and the increase of the number of receive antennas and users are benefit to the improvement of system performance due to multi-antenna and muhiuser diversity, and the presence of a predominant interferer deteriorates the outage performance.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第5期917-922,共6页
Chinese Journal of Radio Science
基金
国家科技重大专项(No.2009ZX03003-004)
国家自然科学基金(No.60902012
No.60772164)
福建省科技重大专项(No.2009HZ0008)
华侨大学自然科学基金(No.10BS208)
福建省自然科学基金(2001J05152)
关键词
同信道干扰
最大比合并
多用户分集
中断概率
coehannel interference （CCI）
maximum ratio combining （MRC）
multiuser diversity
outage probability
