Blind Adaptive Scheme for Joint Frequency Offset and Channel Estimation in OFDM Systems
OFDM systems are wry sensitive to frequency offset. This frequency offset results in intercarrier interference (ICI) and, is a result the performance of the OFDM system degrades drastically. In this paper, a blind adaptive method for joint frequency offset and channel estimation is proposed to reduce ICI effects and estimate frequency offset and channel. Adaptive technique is used to su ppress these ICI effects. The chann el im pulse response (CIR) affected by frequency offset is tracked by a channel tracker in frequency domain. The result of the tracker is used to estimate the frequency otTset and the channel. Then the frequency offset estimate is feedback to compensate the receipt signal. A blind estimation method is used, in consequence the efficiency and security of system are not reduced. The simulated results show that this scheme can reduce ICI effects significantly and the frequency and channel can be estimated effectually.
orthogonal frequency division multiplexing intercarrier interference carrier frequency offset (CFO) estimation channel estimation
Tangdi Zhang Caixiang Wang Xiaowen Li
School of Communication and Information Engineering Chongqing University of Posts and Telecommunications Chongqing, China
国际会议
2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)
大连
英文
1759-1763
2010-07-05（万方平台首次上网日期，不代表论文的发表时间）