A hybrid TDMA/MC-CDMA system utilizing multiuser detection for integrated wireless networks

The essence of this work is to introduce an interaction between the physica l layer and higher network layers, thus enabling a more practical utilizati on of multiuser detection and supporting services with different QoS parame ters. In this paper, a new hybrid TDMA/Multicode (MC)-CDMA medium access co ntrol utilizing multiuser detection is proposed and analyzed. Further, two traffic flow control approaches accompanied the TDMA/MC-CDMA system are pro posed. One approach deterministically controls the flow of traffic into the TDMA slots, while the other statistically controls the flow of traffic dep ending on the instantaneous changes in the traffic load. The two approaches have been examined under a wide range of traffic characteristics where AWG N is only considered besides the mutual interferers from other intracell us ers. Both approaches show superiority as well as less sensitivity in terms of BER to the traffic changes compared with the conventional system.