Experiments on 2-Mbps Data Transmission Applying Antenna Diversity Reception over 5-MHz W-CDMA Mobile Radio Link

Koichi OKAWA  Satoru FUKUMOTO  Kenichi HIGUCHI  Mamoru SAWAHASHI  Fumiyuki ADACHI  

IEICE TRANSACTIONS on Communications   Vol.E83-B   No.8   pp.1602-1609
Publication Date: 2000/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
mobile radio,  W-CDMA,  2-Mbps data transmission,  antenna diversity,  TPC,  

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This paper experimentally demonstrates the possibility of 2-Mbps data transmission using a 5-MHz bandwidth (chip rate of 4.096 Mcps) wideband DS-CDMA (W-CDMA) mobile radio link in frequency-selective multipath fading environments. To reduce the mobile station transceiver complexity, three-orthogonal code multiplexing with the spreading factor (SF) of 4 is employed. In such a small SF transmission, the increased multipath interference (MPI) significantly degrades the transmission performance. We consider two-branch antenna diversity reception and fast transmit power control (TPC) as well as channel coding to mitigate the influence of MPI. Laboratory experimental results show that the use of antenna diversity reception is significant and that the fast TPC improves the transmission performance. Furthermore, the impact of the fading maximum Doppler frequency, fD, and that of the channel coding interleaving size, Tint, on the achievable BER performance are also investigated.