DocumentCode :
640330
Title :
Energy and sampling constrained asynchronous communication
Author :
Tchamkerten, Aslan ; Chandar, Venkat ; Caire, Giuseppe
Author_Institution :
Dept. of Commun. & Electron., Telecom ParisTech, Paris, France
fYear :
2013
fDate :
7-12 July 2013
Firstpage :
2518
Lastpage :
2522
Abstract :
The minimum energy, and, more generally, the minimum input cost, to transmit one bit of information has been recently derived for bursty communication when information is available infrequently at random times at the transmitter. This result assumes that the receiver can sample at no cost all channel outputs. Suppose now there is a cost associated to output sampling and that the receiver is constrained to observe only a fraction ρ ϵ (0, 1] of all channel outputs. What is the input cost penalty due to sparse output sampling? Remarkably, there is no penalty: regardless of ρ > 0 the asynchronous capacity per unit cost is the same as under full sampling, i.e., when ρ = 1. Moreover, there is no penalty in terms of decoding delay with respect to full sampling. This latter result relies on the possibility to sample adaptively; the next sample is a function of past samples. When sampling is non-adaptive it is possible to achieve the full sampling asynchronous capacity per unit cost, but the decoding delay gets multiplied by 1/ρ. Therefore adaptive sampling strategies are of particular interest in the very sparse sampling regime.
Keywords :
compressed sensing; decoding; signal sampling; transmitters; adaptive sampling strategies; bursty communication; channel outputs; decoding delay; energy constrained asynchronous communication; full sampling asynchronous capacity per unit cost; output sampling; receiver; sampling constrained asynchronous communication; sparse sampling regime; transmitter; Decoding; Delays; Noise; Receivers; Transmitters; Uncertainty; Asynchronous communication; bursty communication; capacity per unit cost; energy; sensor networks; sequential decoding; sparse communication; sparse sampling; synchronization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Theory Proceedings (ISIT), 2013 IEEE International Symposium on
Conference_Location :
Istanbul
ISSN :
2157-8095
Type :
conf
DOI :
10.1109/ISIT.2013.6620680
Filename :
6620680
Link To Document :
بازگشت