The Downlink Performance of Massive MIMO Systems under Different Uplink Pilot Allocation Schemes
In the scenario of time division duplexing(TDD)massive multiple-input multiple-output(MIMO)system,when there is pilot contamination(PC)in the uplink,different pilot allocation schemes will affect the results of the uplink channel estimation.When the channel estimation results are used for downlink transmission precoding,which will further affects the downlink performance.This paper analyses the impact of different pilot allocation(PA)schemes on downlink performance.Through theoretical analysis,the system downlink signal to interference plus noise ratio(SINR)and spectral efficiency expressions of different pilot allocation schemes are obtained respectively.The simulation results show that the pilot allocation schemes with cell grouping is better than the schemes without cell grouping.The SINR increases as the number of cell grouping increases,and the spectrum efficiency increases first and then decreases as the number of cell grouping increases.
Ziju Huang Hui Zhi Feiyue Wang
Key Lab of Computing Intelligent and Signal Processing(Ministry of Education),Anhui University,Hefei,China
国际会议
上海
英文
1-10
2018-12-17（万方平台首次上网日期，不代表论文的发表时间）