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Proceedings Paper

Analysis and optimization of OFDM performance over fading and AWGN channel
Author(s): Mohammed Bakir; Waiyun Li; Messaouda Belhachat; Shouzheng Zhu; Jingao Liu
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Paper Abstract

Most wireless system now relies on the use of Orthogonal Frequency Division Multiplexing (OFDM) because of its high data rate and its capability to combat the multi-path interference. In this paper, we investigate how the guard Interval (GI) length dealing with the delayed waves creating by the multi-path fading environment, affect the system performance. We will compare the performances of the system by measuring Bit Error Rate (BER) with QPSK as modulation scheme over multi-path fading and Add White Gaussian Noise (AWGN) in different delay environments. Furthers we will try to determine the optimum values of the GI parameter to achieve a good performance according to the existing delay. The simulations result shows that the GI depends strongly on the maximum delay spread.

Paper Details

Date Published: 28 April 2004
PDF: 7 pages
Proc. SPIE 5284, Wireless Communications and Networks, (28 April 2004); doi: 10.1117/12.523489
Show Author Affiliations
Mohammed Bakir, East China Normal Univ. (China)
Waiyun Li, East China Normal Univ. (China)
Messaouda Belhachat, East China Normal Univ. (China)
Shouzheng Zhu, East China Normal Univ. (China)
Jingao Liu, East China Normal Univ. (China)

Published in SPIE Proceedings Vol. 5284:
Wireless Communications and Networks
Chih-Lin I; Jiann-An Tsai; Hequan Wu, Editor(s)

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