We deal with the problem of blind adaptive MMSE interference suppression in asynchronous dual-rate CDMA networks. Since MMSE detection of the high-rate users requires periodically time-varying processing, the conventional recursive-least-squares (RLS) algorithm does not converge to the true optimum solution. As a consequence, a modified blind “cyclic” RLS algorithm is derived, suited for decoding the high-rate users, which typically requires periodically time-varying processing. Furthermore, simulation results are also presented, showing that the modified RLS algorithm outperforms the conventional RLS in most cases of practical importance
Adaptive MMSE detection for asynchronous dual-rate CDMA systems: time-varying versus time-invariant receivers
BUZZI, Stefano;LOPS, Marco;
1999-01-01
Abstract
We deal with the problem of blind adaptive MMSE interference suppression in asynchronous dual-rate CDMA networks. Since MMSE detection of the high-rate users requires periodically time-varying processing, the conventional recursive-least-squares (RLS) algorithm does not converge to the true optimum solution. As a consequence, a modified blind “cyclic” RLS algorithm is derived, suited for decoding the high-rate users, which typically requires periodically time-varying processing. Furthermore, simulation results are also presented, showing that the modified RLS algorithm outperforms the conventional RLS in most cases of practical importanceI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.