A Study on Phase Error Cancellation for OFDM Systems Using Adaptive Filters

• Main Authors: Kai-Jie Chen, 陳凱傑
• Other Authors: Yung-Fa Huang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/76153008579250177760

碩士 === 朝陽科技大學 === 資訊與通訊系碩士班 === 98 === Orthogonal Frequency Division Multiplexing (OFDM) is a significant technology to provide a high-rate wireless transmissions. However, with applying OFDM technology, one of the principal disadvantages of OFDM is its sensitivity to the common phase error (CPE) and inter-carrier interference (ICI) caused by the random Wiener phase noise. In this paper, a step size delta - least mean square, (SSD-LMS) is used for phase error cancellation. In our scheme, SSD-LMS compared to convention LMS algorithm can reduce the number of iterations and bit error rate (BER), while the fuzzy step size delta - LMS, (FSSD-LMS) with the SSD-LMS in comparison, but also fast convergence and smaller bit error rates. Therefore, the results show that the proposed algorithm can provide a rapid convergence with a low steady-state fluctuation error than that with the conventional LMS algorithm.