Integrated design of adaptive receivers and CDMA/PRMA multimedia medium access scheme
Roger Pierre Fabris Hoefel, Francisco R. P. Cavalcanti · 2002
As packet-mode communications become prevalent in upcoming generations of wireless communications systems, the need to investigate the performance of advanced adaptive signal processing techniques in such a context becomes exigent. We evaluate the impact of some of these schemes, namely the adaptive antenna, the adaptive equalization and the decorrelator multiuser detector, in a comparative performance assessment of an uplink joint CDMA/PRMA and a CDMR/ALOHA protocol. Besides the single resource allocation policy for voice-only traffic, the use of multislot and multicode multirate approaches for continuous bit rate (CBR) and variable bit rate video (VBR) traffic transmission is considered. The presented results permit one to analyze the tradeoffs existing between performance and complexity among the different options, allowing then for an integrated design of the medium access control protocols and advanced receiver algorithms.