Performance analysis of a low-complexity CFO compensation scheme for OFDMA uplink

Chao Yuan Hsu*, Wen-Rong Wu

*此作品的通信作者

研究成果: Article同行評審

摘要

Similar to orthogonal frequency-division multiplexing (OFDM) systems, orthogonal frequency-division multiple access (OFDMA) is vulnerable to carrier frequency offset (CFO). Since the CFO of each user is different, CFO compensation in OFDMA uplink is much more involved than that in OFDM systems. It has been shown that the zeroforcing (ZF) compensation method is a simple yet effective remedy; however, it requires the inversion of a large matrix and the computational complexity can be very high. Recently, we have developed a low-complexity iterative method to alleviate this problem. In this paper, we consider the theoretical aspect of the algorithm. We specifically analyze the output signal-to-interference-plus-noise-ratio (SINR) of the algorithm. Two approaches are used for the analysis; one is simple but approximated, and the other is complicated but exact. The convergence problem is also discussed. In addition to the analysis, we propose a pre-compensation (PC) method enhancing the performance of the algorithm. Simulations show that our analysis is accurate and the PC method is effective.

原文English
頁(從 - 到)954-963
頁數10
期刊IEICE Transactions on Communications
E92-B
發行號3
DOIs
出版狀態Published - 1 1月 2009

指紋

深入研究「Performance analysis of a low-complexity CFO compensation scheme for OFDMA uplink」主題。共同形成了獨特的指紋。

引用此