Abstract

In this thesis we analyze the sum-rate capacity of the Rician fading
multiple-access channel (MAC) with memory. The fading process of the
channel is Gaussian in addition to a line-of-sight
component. Moreover, there are more than one user sending data at the
same time. To simplify our analysis, we consider the single-input
single-output (SISO) case, i.e., all the transmitters and the receiver
use one antenna.

In the analysis of the fading channel capacity, the exact expression
of the capacity is not yet known. A way called asymptotic analysis is
used to derive the channel capacity in the limit when the available
power tends to infinity. It is shown that at high signal-to-noise
ratio (SNR), the sum-rate capacity grows to infinity
doublelogarithmically. The second term in the high-SNR expansion is a
constant called fading number.

In our work, we derive an upper bound on the fading number of the
general m-user SISO Rician fading MAC with memory. Combining the
natural lower bound on the fading number of the single-user SISO
channel, we then obtain the exact fading number of the general m-user
SISO Rician fading MAC with memory. To achieve the fading number, we
have to switch off the worse users and allow the best users
communicate by time-sharing.



-||-   _|_ _|_     /    __|__   Stefan M. Moser
[-]     --__|__   /__\    /__   Senior Researcher & Lecturer, ETH Zurich, Switzerland
_|_     -- --|-    _     /  /   Adj. Professor, National Chiao Tung University (NCTU), Taiwan
/ \     []  \|    |_|   / \/    Web: http://moser-isi.ethz.ch/


Last modified: Mon Sep 10 09:48:42 UTC+8 2012