Analysis of Downlink Wideband DS-CDMA Systems with Smart Antenna for Different Spreading Bandwidths in Wideband Multipath Channel
Jun-Soo Jeon, Cheol-Sung Kim · Journal of electromagnetic engineering and science · 2004
In this paper, the Eigen-RAKE receiver in wideband direct sequence code-division multiple access(DS-CDMA) systems with downlink smart antenna is analyzed for different spreading bandwidths(l 25㎒, 5㎒, 10㎒) and different channel environments(macro, micro). The realistic spatia-temporal wide band multipath channel is assumed, one of which is standardized multiple-input single-output(MISO) radio channel model for WCDMA link-level simulations proposed by 3' generation partnership project(3GPP) contributions. We assumed spatial scattering phenomenon In which many unresionable path signals within a limited range of spatial angle simultaneously contribute to the signals received at the receiver. Several multipaths within one chip are distinguished into each one and the first multipath components are selected as the desired signal and the others are considered self-interference Downlink DS-CDMA system with eigenbeamformer using wider bandwidth present better performance than that using narrow bandwidth system by employing Eigen-RAKE receiver of many number of blanches It is shown that the downlink eigenbeamformer is more effective in typical urban macro cellular environments when using Eigen-RAKE receiver.