Name
Abstract | ||
|---|---|---|
We study optimal constant-rate coding schemes for a block-fading channel with strict transmission delay constraint, under the assumption that both the transmitter and the receiver have perfect channel-state information. We show that the information outage probability is minimized by concatenating a standard “Gaussian” code with an optimal power controller, which allocates the transmitted power dynamically to the transmitted symbols. We solve the minimum outage probability problem under different constraints on the transmitted power and we derive the corresponding power-allocation strategies. In addition, we propose an algorithm that approaches the optimal power allocation when the fading statistics are not known. Numerical examples for different fading channels are provided, and some applications discussed. In particular, we show that minimum outage probability and delay-limited capacity are closely related quantities, and we find a closed-form expression for the delay-limited capacity of the Rayleigh block-fading channel with transmission over two independent blocks. We also discuss repetition diversity and its relation with direct-sequence or multicarrier spread-spectrum transmission. The optimal power-allocation strategy in this case corresponds to selection diversity at the transmitter. From the single-user point of view considered in this paper, there exists an optimal repetition diversity order (or spreading factor) that minimizes the information outage probability for given rate, power, and fading statistics |
Year | DOI | Venue |
|---|---|---|
1999 | 10.1109/18.771147 | IEEE Transactions on Information Theory |
Keywords | Field | DocType |
AWGN channels,Rayleigh channels,channel coding,delays,diversity reception,land mobile radio,optimal control,power control,probability,radio transmitters,spread spectrum communication,telecommunication control,AWGN channel,Rayleigh block-fading channel,closed-form expression,delay-limited capacity,direct-sequence spread-spectrum transmission,dynamic transmitted power allocation,fading statistics,information outage probability,minimum outage probability problem,mobile wireless system,multicarrier spread-spectrum transmission,optimal constant-rate coding,optimal power allocation,optimal power controller,optimum power control,perfect channel-state information,receiver,repetition diversity,selection diversity,spreading factor,standard Gaussian code,transmission delay constraint,transmitted symbols,transmitter | Discrete mathematics,Topology,Transmitter,Telecommunications,Optimal control,Fading,Computer science,Power control,Transmission delay,Communication channel,Fading distribution,Channel capacity | Journal |
Volume | Issue | ISSN |
45 | 5 | 0018-9448 |
Citations | PageRank | References |
431 | 52.61 | 9 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Giuseppe Caire | 1 | 9797 | 807.61 |
| Taricco, Giorgio | 2 | 758 | 85.88 |
| Biglieri, Ezio | 3 | 1023 | 176.89 |