Application of adaptive antenna array to IMT-2000 based on W-CDMA
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Wideband wireless access based on DS-CDMA (W-CDMA) is a wireless access technique for the 3rd generation mobile communication systems using 2-GHz carrier bands. There are several promising techniques that significantly enhance the radio link performance or capacity. They are (a) interference reduction techniques (adaptive antenna array and interference cancellation) and (b) required Eb/I0 reduction techniques (channel coding and adaptive transmit power control (TPC)). This paper focuses on the adaptive antenna array and introduces its design concept for application to IMT-2000. For the last decade, many theoretical studies have been conducted on this technique. Now, it is time to implement real hardware to demonstrate their capabilities in real mobile radio propagation channels. A W-CDMA adaptive antenna array diversity transceiver was implemented to evaluate the transmission performance in a multipath fading environment both by laboratory and field experiments. Preliminary experimental results are presented.
Abstract
Wideband wireless access based on DS-CDMA (W-CDMA) is a wireless access technique for the 3rd generation mobile communication systems using 2-GHz carrier bands. There are several promising techniques that significantly enhance the radio link performance or capacity. They are (a) interference reduction techniques (adaptive antenna array and interference cancellation) and (b) required Eb/I0 reduction techniques (channel coding and adaptive transmit power control (TPC)). This paper focuses on the adaptive antenna array and introduces its design concept for application to IMT-2000. For the last decade, many theoretical studies have been conducted on this technique. Now, it is time to implement real hardware to demonstrate their capabilities in real mobile radio propagation channels. A W-CDMA adaptive antenna array diversity transceiver was implemented to evaluate the transmission performance in a multipath fading environment both by laboratory and field experiments. Preliminary experimental results are presented.