A Diverse Proof of OFDM Channel Estimation Comparing CP-Sequences and Training-Sequences Methods under LS Frame
This article presents a diverse and primary proof of one indifferent but subtle conclusion of OFDM channel estimation problem, that is, in frequency domain performance of CP-based channel estimation method can hardly surpass the conventional ones such as training-sequence-based methods. We get the conclusion and first give detailed proof that under LS principle when directly transform cyclic prefix (CP) into frequency domain as CP-sequences, we can always find those training-sequences which have better performance than the CP-sequences method. Specifically, we first calculate MSE of Least-Square (LS) principle. Then, according to MSE calculated we give our central proof using DFT analysis and multitudes of inequality relations. At last, we also give simulation that ensures the correctness of our proofs and give new suggestions of this topic concerned.
orthogonal frequency division multiplexing (OFDM) cyclic prefix (CP) CP-sequences training-sequences mean square error (MSE) Least-Square (LS) DFT analysis
Wangxing Zhao Fang Fang
Dept of ee University of Electronic Science and Technology of China Chengdu, China
国际会议
重庆
英文
883-887
2011-08-20（万方平台首次上网日期，不代表论文的发表时间）