Channel Estimate with PDP Assumption and Interference RS knowledge in LTE System

摘要：

　　In this article,we discuss the LMMSE(linear minimum mean square error) channel estimate methods on OFDM(Orthogonal Frequency Division Multiplexing) in LTE system.To reduce the complexity of LMMSE,a constant assumption PDP(power delay profile) is used with little performance backoff.The influence of different PDP assumption and channel condition is simulated that the proposed algorithm is robust.Then we come to SRS(sounding reference signal) which different users send different sequence in the same time-frequency resources in LTE system.Simulation results show that if user number is not more than 4,the MSE performance nearly equals to single user,that is LMMSE channel estimate can cancel orthogonal RS sequence interference implicitly.DMRS(demodulation RS) estimate in CoMP scenario has also been discussed whose performance can be increased substantially with the knowledge of interference RS sequence.

关键词： channel estimate assumed PDP LMMSE known RS sequence

作者: Liang Lin Niu Kai Xu Wenjun Tian Baoyu Gong Ping Sun Shaohui

作者单位: Key Lab of Universal Wireless Communications,Ministry of Education, BUPT Beijing, P.R. China;State K Key Lab of Universal Wireless Communications,Ministry of Education, BUPT Beijing, P.R. China State Key Laboratory of Wireless Mobile Communications, CATT Beijing, P.R. China

会议类型: 国际会议

会议名称: 2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))

会议地点: 成都

会议语种:英文

页码: 621-625

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）