In this paper, we study an innovative
multiple access scheme that exploits the intrinsic properties of the wireless
envi- ronment to improve the multiuser environment, so-called Channel
Division Multiple Access (ChDMA) focusing on spectral efficiency analysis and
system performance. In particular, we show that Simultaneous multiuser accessing to a common
destination is made possible by considering the channel impulse response (CIR)
of each user as a signature. We begin by the assumption of the channel state
information available at the receiver. Then, we analyze the perform- ance of the ChDMA
integration in a random environment over UWB high data rate channel. Next, we
discuss the de- sign of MMSE and optimal receiver structure for such a system.
Additionally, we show an asymptotic analysis behavior taking into account the channel
eigenvalues distribution with the associated spectral efficiency.