电讯技术Issue(3)：332-337,6.DOI:10.3969/j.issn.1001-893x.2014.03.016
基于低峰均比最优导频序列的MIMO-OFDM信道估计
MIMO-OFDM Channel Estimation Based on Low-PAPR Optimal Pilot Sequence
摘要
Abstract
Channel estimation is the key of coherent demodulation for MIMO-OFDM system signal receiv-er. Aiming at the problem that the optimal pilot sequences( OPS) have high Peak to Average Power Ratio ( PAPR) ,this paper designs a kind of OPS based on low-PAPR to estimate MIMO-OFDM system. Firstly, on the basis of MIMO-OFDM system model, the OPS of MIMO-OFDM system is designed, and the theory of Partial Transmit Sequence( PTS) is applied to design the low-PAPR enhanced optimal pilot sequences ( EOPS) . Finally, the EOPS are used for MIMO-OFDM system channel estimation and the high complexity of the algorithm is simplified. And on this basis, the Complementary Cumulative Distribution Function ( CCDF) of the signal's PAPR in each transmitting antenna and the mean square error( MSE) , the bit er-ror rate( BER) performance of the OPS before and after the improvement are simulated and analyzed. The simulation results show that the EOPS distributed in more than one OFDM symbol can effectively reduce the PAPR of the system; at the same time, compared with the original OPS, it keeps the MSE and BER performance optimal.关键词
MIMO-OFDM系统/信道估计/低峰均比/最优导频序列Key words
MIMO-OFDM system/channel estimation/low PAPR/optimal pilot sequence分类
信息技术与安全科学引用本文复制引用
谢泽东,陈西宏,胡邓华,刘强,张群..基于低峰均比最优导频序列的MIMO-OFDM信道估计[J].电讯技术,2014,(3):332-337,6.基金项目
国家自然科学基金资助项目(61172169)@@@@The National Natural Science Foundation of China(No.61172169) （61172169）
