A Simplified Time-Domain Channel Estimation Approach for OFDM System

Abstract:

OFDM usually incorporates pilot tones in the frequency domain (FD) or training symbols in the time-domain (TD) to facilitate channel estimation algorithms. TD channel estimation becomes more attractive in quasi-static channels because channel estimation scheme will optimize the spectral efficiency by re-using the training symbols designated for FD channel estimation. A channel estimation method based on time domain averaging algorithm is proposed. Due to the principle of centralized energy in time domain, the effective channel impulse response length can be detected by setting of threshold for the estimated channel impulse response length. Computer simulation demonstrates the performance of the proposed algorithms in terms of bit error rate performance.

• Periodical: Applied Mechanics and Materials (Volumes 738-739)
• Pages: 1111-1114
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.738-739.1111
• Online since: March 2015
• Authors: Sheng Bo Huang*, Yu Cang Wen, Wen Ye, Tong Liang Fan
• Keywords: Channel Estimation, CIR (Channel Impulse Response), OFDM, Time-Domain Threshold

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