An Ef.cient CFO Estimation Algorithm for the Downlink of 3GPP-LTE
ynchronization is of fundamental importance for wireless cellular systems, especially for orthogonal frequency division multiplexing (OFDM) based systems. In this paper, we investigate carrier frequency offset (CFO) estimation in the initial synchronization for the downlink of 3GPP-long term evolution (3GPP-LTE). Firstly, three traditional CFO estimation schemes including the primary synchronization channel (P-SCH) signals (PSS) correlation based scheme, the cyclic pre.x (CP) based scheme, and the multiple signal classi.cation (MUSIC) based scheme, are respectively applied. Simulation results show that the PSS correlation based scheme can achieve better performance than the other two. Furthermore, we extend the traditional PSS correlation based scheme, and propose a more ef.cient CFO estimation algorithm. Simulation results show that, compared to the traditional estimator, the proposed estimator has better estimation performance in terms of normalized mean square error (MSE), and achieves a gain of around 2 dB over both additive white Gaussian noise (AWGN) channels and frequency selective fading channels.
3GPP-LTE downlink OFDM synchronization CFO estimation PSS correlation MUSIC algorithm mean square error.
Feng Wang Yu Zhu
School of Information Science and Engineering Fudan University, Shanghai, China
国际会议
南京
英文
1-6
2011-11-09（万方平台首次上网日期，不代表论文的发表时间）