Name
Abstract | ||
|---|---|---|
We determine the capacity regions for a class of time-varying multiple-access channels (TVMACs), when the underlying channel state evolves in time according to a probability law which is known to the transmitters and the receiver. Additionally, the transmitters and the receiver have access to varying degrees of channel state information (CSI) concerning the condition of the channel. Discrete-time channels with finite input, output, and state alphabets are considered first. The special case of a TVMAC, with the channel state process being a time-invariant, indecomposable, aperiodic Markov chain, shows a surprising anomaly in that imperfect transmitter CSI can cause the capacity under some distributions for the initial state to be strictly larger than that under a stationary distribution for the initial state. We also study a time-varying multiple-access fading channel with additive Gaussian noise, when various amounts of CSI are provided to the transmitters and perfect CSI is available to the receiver, and the fades are assumed to be stationary and ergodic. Implications for transmitter power control are discussed |
Year | DOI | Venue |
|---|---|---|
2002 | 10.1109/18.971736 | IEEE Transactions on Information Theory |
Keywords | DocType | Volume |
multiuser channels,decoder,probability law,channel state information,discrete-time channels,time-invariant markov chain,channel state process,power control,radio transmitters,awgn channels,additive gaussian noise,finite input alphabet,side information,transmitter power control,imperfect transmitter csi,fading channels,time-varying fading channel,receiver,stationary fading,fading channel,time-varying multiple-access fading channel,memoryless systems,transmitters,multi-access systems,indecomposable markov chain,awgn channel,finite state alphabet,markov processes,time-varying channels,transmitter complexity reduction,aperiodic markov chain,encoder,time-varying multiple-access channels,ergodic fading,channel capacity,channel state,discrete time systems,memoryless channel,radio receivers,telecommunication control,finite output alphabet,gaussian noise,stationary distribution,markov chain,capacity regions,probability,perfect csi,indexing terms,input output,fading,discrete time | Journal | 48 |
Issue | ISSN | ISBN |
1 | 0018-9448 | 0-7803-7119-4 |
Citations | PageRank | References |
46 | 3.54 | 12 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Amar Das | 1 | 60 | 13.54 |
| priyanka narayan | 2 | 46 | 3.54 |