Experimental evaluation of pilot arrangement for channel estimation in OFDM systems

摘要：

Pilot pattern and pilot density are often used for channel estimation in optical/electrical OFDM systems. The transmission of the OFDM signals is experimentally investigated via different pilot tone approaches for effective channel estimation. Three kinds of pilot patterns (comb-type, block-type and incline-type) are used to evaluate the output OFDM signal in terms of error vector magnitude (EVM), based on the Least Square (LS) channel estimation algorithm. It has been shown that, the pilot insertion will definitely improve the quality of the transmitted OFDM signals up to 6 dB. The best channel estimation is obtained by the block-type pilot pattern, which gives nearly 1dB gain in EVM compared with the other two patterns, implying the measured electrical cable channel is relatively quasi-static.

关键词： OFDM channel estimation pilot tone error vector magnitude (EVM)

作者: Lilong Liu Xuelin Yang Jun Li Meihua Bi Hao He Weisheng Hu

作者单位: State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University, Shanghai, 200240, China

会议类型: 国际会议

会议名称: 2011亚洲光纤通信与光电国际会议

会议地点: 上海

会议语种:英文

页码: 1-3

在线出版日期: 2011-11-13（万方平台首次上网日期，不代表论文的发表时间）