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Two-Layer CI Phase Coding Interference Cancellation and Detection of Uplink Broadband Wireless Access System

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3 Author(s)
Le Thanh Son ; Univ. Grad. Center at Kjeller, Kjeller ; Ekman, T. ; Orten, P.

Multi-carrier OFDM-CDMA has a range of advantages that make ideal for high data rate wireless access system. A two-layer carrier interferometry (CI) phase coding approach is proposed for enhancing multi-user detection of the mm wavelength multi-carrier OFDM-CDMA based uplink broadband wireless access system (BWA). The proposed OFDM-CDMA scheme uses a two-layer CI phase coding structure, which comprises outer and inner CI modulations and is combined with the iterative interference cancellation and detection to boost the system capability in the high radio fading and strong multiple access interference environment. The orthogonal property of the CI signals is exploited to enhance diversities in time, frequency and spreading code domains, as well as to simplify signal processing. No pilot signal is needed. The proposed two-layer CI OFDM-CDMA scheme for the uplink BWA is mathematically analyzed, and its numeric simulations are carried out to evaluate the system performance. The simulation results show the superior characteristics of the proposed two-layer CI phase coding scheme for the uplink BWA system compared to other schemes.

Published in:

Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE

Date of Conference:

March 31 2008-April 3 2008

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