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为Nakgami-m和Rayleigh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和平均误符号率(ASER)的闭合表达式.仿真结论显示,系统中断概率和ASER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 system with maximal ratio combining and multiuser scheduling is studied in the multiuser uplink in the presence of unequal power cochannel interferences from other cells.The channels of useful and interference signals are assumed to be Nakagami-m and Rayleigh fading.The closed form expressions for outage probability and average symbol error ratio（ASER） of system are 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 both of benefit to the improvement of system performance due to multi-antenna and multiuser diversity,and the presence of a predominant interferer deteriorates the outage performance.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2011年第10期2235-2239,2250,共6页
Acta Electronica Sinica
基金
国家973重点基础研究发展计划(No.2007CB310603)
国家自然科学基金(No.60902012
No.60702029)
国家科技重大专项(No.2009ZX03003-004)
教育部博士点新教师基金(No.20090092120013)
江苏省产学研项目(No.SBY201020107)
关键词
同信道干扰
最大比合并
多用户分集
中断概率
平均误符号率
cochannel interference（CCI）
maximum ratio combining（MRC）
multiuser diversity
outage probability
average symbol error ratio（ASER）
