Title :
Frequency Domain MMSE Equalization with Moving FFT for MBOK DS-UWB System
Author :
Shin-Woo Kang ; Se-Bin Im ; Hyung-Jin Choi
Author_Institution :
Sch. of Inf. & Commun. Eng., Sung Kyun Kwan Univ.
fDate :
Sept. 29 2006-Oct. 1 2006
Abstract :
In this paper, we propose a frequency domain (FD) MMSE equalizer for M-ary bi-orthogonal keying direct sequence UWB (MBOK DS-UWB) systems considered as a PHY proposal for high-speed wireless communication in IEEE 802.15.3a. 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 the traditional time-domain (TD) MMSE-RAKE receiver, the proposed FD MMSE equalizer has a better BER performance and we demonstrate this result by computer simulation
Keywords :
channel estimation; error statistics; fast Fourier transforms; frequency-domain analysis; least mean squares methods; multipath channels; personal area networks; radio receivers; spread spectrum communication; time-domain analysis; ultra wideband communication; FFT; IEEE 802.15.3a; M-ary biorthogonal keying direct sequence UWB systems; MBOK DS-UWB system; channel estimation error; computer simulation; cyclic prefix; equalization scheme; frequency domain MMSE equalization; high-speed wireless communication; moving average scheme; multipath delay; time-domain MMSE-RAKE receiver; Channel estimation; Computer errors; Delay effects; Delay estimation; Equalizers; Frequency domain analysis; Physical layer; Proposals; Time domain analysis; Wireless communication;
Conference_Titel :
Software in Telecommunications and Computer Networks, 2006. SoftCOM 2006. International Conference on
Conference_Location :
Split
Print_ISBN :
953-6114-90-9
DOI :
10.1109/SOFTCOM.2006.329767
