Asynchronous MIMO STBC Adaptive Array Transmission Scheme for Multiuser over Fast Fading Channel

Supawan ANNANAB  Tomonori TOBITA  Tetsuki TANIGUCHI  Yoshio KARASAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B    No.8    pp.2666-2673
Publication Date: 2008/08/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.8.2666
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO,  space-time code,  transmit diversity,  fast fading,  Doppler spread,  Asynchronous transmission,  co-channel interference,  tapped delay line,  array processing,  

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Summary: 
We propose an implementation of the tapped delay line adaptive array (TDLAA) at the base station for improving the BER performance of asynchronous multi-user mobile communication over fast fading channels using multiple antennas. The data of each user at the mobile station, which applies two transmit antennas, are encoded by Space Time Block Code (STBC). The proposed scheme transmits the pilot signal and information data in alternate time slots. We derive performance criteria for designing such a scheme under the assumption that the fading is classified as fast fading. We show that the proposed scheme can suppress co-channel interference (CCI) and defeat Doppler spread effectively.