Abstract :
By exploiting analytical and semianalytical methodologies, performance of DS-CDMA system for picocellular applications, including multipath propagation channels and a RAKE receiver, is evaluated. The system performance is defined in terms of both the mean bit error probability and outage probability, taking the exact evaluation of spreading codes correlation into account. The spreading sequences investigated include some well known two-level sequences and multilevel sequences with complex mapping. By varying the spreading codes and propagation channel conditions, the following aspects have been considered in the numerical results: a comparison of RAKE receivers and simple correlator receivers, the trade-off between receiving taps number and performance, the degradation effects due to not ideal spreading code correlation, and a comparison between binary and multilevel sequences
Keywords :
binary sequences; cellular radio; code division multiple access; coding errors; correlators; error statistics; land mobile radio; multipath channels; probability; pseudonoise codes; radio receivers; spread spectrum communication; CDMA picocellular systems; DS-CDMA system; RAKE receivers; binary sequences; complex mapping; correlator receivers; degradation effects; mean bit error probability; multilevel sequences; outage probability; propagation channel conditions; receiving taps number; spreading code; spreading codes correlation; system performance; two-level sequences; Base stations; Fading; Frequency; IEEE members; Multiaccess communication; Multipath channels; Performance analysis; RAKE receivers; System performance; Transmitters;
