Robust Signaling for Bursty Interference

Autor: Grace Villacrés, Tobias Koch, Aydin Sezgin, Gonzalo Vazquez-Vilar
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Entropy, Vol 20, Iss 11, p 870 (2018)
Druh dokumentu: article
ISSN: 1099-4300
DOI: 10.3390/e20110870
Popis: This paper studies a bursty interference channel, where the presence/absence of interference is modeled by a block-i.i.d. Bernoulli process that stays constant for a duration of T symbols (referred to as coherence block) and then changes independently to a new state. We consider both a quasi-static setup, where the interference state remains constant during the whole transmission of the codeword, and an ergodic setup, where a codeword spans several coherence blocks. For the quasi-static setup, we study the largest rate of a coding strategy that provides reliable communication at a basic rate and allows an increased (opportunistic) rate when there is no interference. For the ergodic setup, we study the largest achievable rate. We study how non-causal knowledge of the interference state, referred to as channel-state information (CSI), affects the achievable rates. We derive converse and achievability bounds for (i) local CSI at the receiver side only; (ii) local CSI at the transmitter and receiver side; and (iii) global CSI at all nodes. Our bounds allow us to identify when interference burstiness is beneficial and in which scenarios global CSI outperforms local CSI. The joint treatment of the quasi-static and ergodic setup further allows for a thorough comparison of these two setups.
Databáze: Directory of Open Access Journals
Nepřihlášeným uživatelům se plný text nezobrazuje