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OFDM Channel Estimation with Jammed Pilot Excision Method under Narrow-Band Jamming  

Han, Myeong-Su (연세대학교 전기전자공학과 정보통신 연구실)
Yu, Tak-Ki (㈜ 삼성전자 정보통신총괄 통신연구소)
Kim, Ji-Hyung (연세대학교 전기전자공학과 정보통신 연구실)
Kwak, Kyung-Chul (연세대학교 전기전자공학과 정보통신 연구실)
Han, Seung-Youp (연세대학교 전기전자공학과 정보통신 연구실)
Hong, Dae-Sik (연세대학교 전기전자공학과 정보통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.2C, 2007 , pp. 166-173 More about this Journal
Abstract
In Orthogonal Frequency Division Multiplexing (OFDM) systems, Narrow-Band Jamming (NBJ) over pilot tones used for channel estimation degrades the system performance. In this paper, we propose a new jammed pilot detection and elimination algorithm to overcome this problem. Moreover, the average Mean-Squared Error (MSE) on one OFDM symbol both under jammed and removed pilot subcarrier is analyzed. And then, the Symbol Error Rate (SER) performance of the channel estimation scheme using the proposed algorithm is evaluated by simulation. We can confirm that the channel estimator with the proposed algorithm improves the channel estimation performance at a high jamming power.
Keywords
Channel Estimation; Least-Squares; Linear Interpolation; Narrow-Band Jamming; OFDM Systems;
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