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This paper deals with the estimation of rapidly time varying non isotropic Rayleigh fading channels in Space-Time (ST) coded direct sequence spread spectrum (DS-CDMA) systems. The effects of non isotropic scattering can be captured by using Von Mises distribution for the angle of arrival (AOA) of the scattered waves at the receiver. In order to benefit from the spatial diversity of ST coding, we need...
In this paper an improved RLS (ImRLS) based adaptive MMSE decision directed MC-CDMA Receiver for Rayleigh fading channels is developed. The technique adopted by the ImRLS, is to reduce the noise components in the RLS-estimated channel frequency response before applying it to the MMSE adaptive detector. This is done by an IFFT, limiting window and an FFT. Simulation results in rayleigh fading multiuser...
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