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The performance of feedback type adaptive array antenna in FDD/DS-CDMA system

This paper presented the performance of feedback type AAA in an FDD/DS-CDMA system. The results include the effects of antenna spacing, feedback control delay time and the maximum Doppler frequencies under flat fading and frequency-selective fading. All these results are investigated under an ideal condition that measured channel characteristics are sent back precisely to the base station. We compared the performances of our system with that of 3GPP transmit diversity system (mode1).