Adaptive modulation and adaptive antenna array assisted network performance of multi-user detection aided UTRA-like FDD/CDMA

The adaptive antenna array and adaptive modulation aided network performance of a frequency division duplex (FDD) code division multiple access (CDMA) based system is investigated using system parameters similar to those of the Universal Mobile Telecommunication System (UMTS). A number of performance metrics, such as the call dropping probability, the average throughput as well as the required average transmit power are quantified. It is demonstrated that the employment of adaptive modulation techniques in conjunction with adaptive antenna arrays resulted in significant network capacity gains in the scenarios investigated.