Krusevac, ZarkoKennedy, RodneyRapajic, Predrag2015-12-072015-12-07May 7-10 21780393929http://hdl.handle.net/1885/27549This paper shows through theory and simulation the superiority of model-based adaptive algorithms relative to observation-only-based adaptive algorithms, such as LMS and RLS, when applied to tracking time-varying channels. The model-based formulation reveals RLS as a degenerate algorithm which does not explicitly recognize the time-varying nature of the channel and consequently is ill-suited to tracking in non-stationary environments. Simulation results for MSE performance of the various adaptive algorithms applied to adaptive MMSE multiuser receiver corroborate the theoretical analysis.Keywords: Algorithms; Channel capacity; Communication channels (information theory); Computer simulation; Mathematical models; Time varying systems; Adaptive multiuser detection; Degenerate algorithms; Multiuser receivers; Adaptive algorithms20062015-12-07