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Pre-Equalization Based Initial Ranging Scheme for TDD-OFDMA Systems in Frequency Selective Channel
Qiwei WANG Guangliang REN
IEICE TRANSACTIONS on Communications
Publication Date: 2013/12/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Transmission Systems and Transmission Equipment for Communications
TDD-OFDMA, pre-equalization, initial ranging, frequency selectivity,
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To mitigate the impact of the frequency selectivity of the wireless channel on the initial ranging (IR) process in 802.16 based WiMax systems, several well known pre-equalization techniques applied in the IR are first analyzed in detail, and the optimal pre-equalization scheme is further improved for the IR by overcoming its weaknesses. A numerical simulation shows that the proposed pre-equalization scheme significantly improves the performance of multiuser detection and parameter estimation in the IR process.