DocumentCode :
2455994
Title :
The diagonal vector Gaussian finite state MAC with cooperative encoders and delayed CSI
Author :
Goldfeld, Ziv ; Permuter, Haim H. ; Zaidel, Benjamin M.
fYear :
2012
fDate :
14-17 Nov. 2012
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, the capacity region of the diagonal vector Gaussian finite-state multiple access channel (MAC) with partially cooperative encoders is derived. The diagonal vector channel models an OFDM based communication system. Partial cooperation here is in the sense that the encoders communicate with each other through finite-capacity links. The channel states are assumed to be governed by a Markov processes. Full channel state information (CSI) is assumed at the receiver, while only delayed CSI is available at transmitters. The capacity region is presented in a convex optimization form, thus it can be easily computed using numerical tools. The region is derived by first upper bounding the general capacity expressions and then achieving these upper bounds by choosing a specific distribution for the channel input vectors. In order to do so, extensions to the multivariate case of tools and properties used in [1] for the non time-varying, scalar model, are presented.
Keywords :
Gaussian channels; Markov processes; OFDM modulation; access protocols; channel capacity; channel coding; convex programming; cooperative communication; delays; radio links; radio receivers; radio transmitters; MAC; Markov process; OFDM; channel state information; convex optimization; delayed CSI; diagonal vector Gaussian finite state; diagonal vector channel model; finite capacity link; multiple access channel; nontime-varying model; numerical tools; partially cooperative encoder; receiver; scalar model; transmitter; AWGN; Covariance matrix; Decoding; Delay; Markov processes; Upper bound; Vectors; Capacity region; Convex optimization; Cooperative encoders; Delayed CSI; Diagonal vector channel; Finite-state channel; Gaussian multiple-access channel; Multiple-access channel;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical & Electronics Engineers in Israel (IEEEI), 2012 IEEE 27th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4673-4682-5
Type :
conf
DOI :
10.1109/EEEI.2012.6376984
Filename :
6376984
Link To Document :
بازگشت