Pre-Equalization Based Initial Ranging Scheme for TDD-OFDMA Systems in Frequency Selective Channel

Qiwei WANG  Guangliang REN  

IEICE TRANSACTIONS on Communications   Vol.E96-B   No.12   pp.3050-3061
Publication Date: 2013/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.3050
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.