A new digital communications receiver using partial knowledge of the channel state information

Abstract

This work presents a new digital communications receiver that requires only partial knowledge of the channel state information (CSI). Generally speaking, the CSI is composed of real and imaginary components, which can be expressed as h = |h| e^jθ, where |h| corresponds to the channel attenuation and θ is the phase shift. In the proposed receiver, only |h| is required to detect the transmitted symbols with low probability of error. The proposed receiver can be used to increase the spectral efficiency of most digital communications receivers and/or reduce their error probability.