Title :
Diversity versus channel knowledge at finite block-length
Author :
Wei Yang ; Durisi, Giuseppe ; Koch, Thorsten ; Polyanskiy, Yury
Author_Institution :
Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
We study the maximal achievable rate R*(n, ∈) for a given block-length n and block error probability o over Rayleigh block-fading channels in the noncoherent setting and in the finite block-length regime. Our results show that for a given block-length and error probability, R*(n, ∈) is not monotonic in the channel´s coherence time, but there exists a rate maximizing coherence time that optimally trades between diversity and cost of estimating the channel.
Keywords :
Rayleigh channels; diversity reception; error statistics; Rayleigh block-fading channels; block error probability; channel coherence time; channel knowledge; diversity; finite block-length; maximal achievable rate; noncoherent setting; Approximation methods; Channel estimation; Coherence; Fading; Receivers; Signal to noise ratio; Upper bound;
Conference_Titel :
Information Theory Workshop (ITW), 2012 IEEE
Conference_Location :
Lausanne
Print_ISBN :
978-1-4673-0224-1
Electronic_ISBN :
978-1-4673-0222-7
DOI :
10.1109/ITW.2012.6404740
