Spectral efficiency of linear multiuser receiver over UWB high data rate channel based on channel division multiple access

This contribution is focused on the design and analysis of an innovative multiple access scheme that exploits the intrinsic properties of the wireless environment to improve the multiuser environment, entitled Channel Division Multiple Access (ChDMA). Such a design allows simultaneous multiuser accessing to a common destination by considering the channel impulse response (CIR) of each user as a signature. Benefitting from the natural diversity of the wireless environment, the receiver is able to detect and demodulate the received signals by using the channel as a code under the assumption of the channel state information. We analyze the performance of the ChDMA integration in MBOFDM UWB high data rate channel in a random environment. The spectral efficiency criterion is chosen to investigate the performance analysis using MMSE receiver. Additionally, we analyze an asymptotic analysis of MMSE detector behavior taking into account the channel eigenvalues distribution with the associated spectral efficiency. A concept of power delay profile (PDP) has emerged from this work to investigate its impact into the spectral efficiency.