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Design of a Frequency Domain Equalizer Algorithm for MBOK DS-UWB System  

Kang, Shin-Woo (삼성전자 정보통신총괄 통신연구소)
Im, Se-Bin (성균관대학교 정보통신공학과)
Choi, Hyung-Jin (성균관대학교 정보통신공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.10A, 2007 , pp. 1034-1041 More about this Journal
Abstract
In this paper, we propose a FD USE (frequency domain minimum mean square error) equalizer algorithm for MBOK DS-UWB (M-ary bi-orthogonal keying direct sequence UWB) systems considered as a PHY proposal for high-speed wireless communication in IEEE 802.15.TG3a. The conventional FD MMSE equalization scheme has a structural limit due to insertion of the cyclic prefix (CP) in all transmit packets, but the proposed scheme is able to equalize the channel effect without CP. In order to overcome channel estimation error by multipath delay, we introduce a moving FFT and a moving average scheme. Compared with conventional FD MMSE equalizer and the traditional TD (time domain) MMSE-RAKE receiver, the proposed FD MMSE equalizer has better BER performance and we demonstrate this result by computer simulation.
Keywords
UWB; IEEE 802.15.3a; MBOK; FDE; Equalizer; Moving Average; Moving FFT;
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