Monte Carlo methods. Vol. 1: basics
Monte Carlo methods. Vol. 1: basics
Minimum probability of error for asynchronous Gaussian multiple-access channels
IEEE Transactions on Information Theory
Spread spectrum communications handbook (revised ed.)
Spread spectrum communications handbook (revised ed.)
CDMA: principles of spread spectrum communication
CDMA: principles of spread spectrum communication
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Capacity enhancement of cellular CDMA is analyzed using anasymmetrical-bandwidth-allocation approach. Cellular CDMAsystems with and without successive interference cancellationare considered. The main source of interference is interuserinterference and, in particular, a 9-cell configuration isemployed to account for interference from surrounding cells. Bytransferring more bandwidth or, equivalently, processing gainfrom the forward link to the reverse link, we have effectivelybalanced their performance and raised the overall capacity ofthe cellular system. The optimum bandwidth allocation is easilyobtained from the performance curves of both links. For atypical cellular CDMA with a bit error rate of 10^-3, thecapacity gain of this approach is about 40%. If successiveinterference cancellation is employed and both links have thesame quality, then both links should have equal bandwidth.However, in a situation where imperfect power control occurs,our studies indicate that using interference cancellation aloneachieves a 25% increase in capacity, while enhancement withan asymmetrical bandwidth allocation overlay raises this gain to68%.