Abstract
In this paper, we study the achievable rates and scaling laws of large-scale wireless relay networks in the low SNR regime. Specifically, we consider a relay network that consists of one source node, one destination node and many relay nodes. We examine the achievable rates in the asymptotic regime in terms of the number of relay nodes n, the channel coherence interval L, and the SNR per link £. Assuming that the relay nodes use amplify-and-forward (AF) with network training, we present an equivalent end-to-end model, and obtain the corresponding achievable rates of the relay networks in the low SNR regime. Our findings show that when the normalized energy in each fading block (£L) is bounded below, the achievable rate is of the same scaling order as in the coherent relaying case, thus enabling us to characterize the capacity of relay networks in the low SNR regime.
Original language | English (US) |
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Title of host publication | 43rd Annual Allerton Conference on Communication, Control and Computing 2005 |
Publisher | University of Illinois at Urbana-Champaign, Coordinated Science Laboratory and Department of Computer and Electrical Engineering |
Pages | 1327-1336 |
Number of pages | 10 |
Volume | 3 |
ISBN (Electronic) | 9781604234916 |
State | Published - 2005 |
Event | 43rd Annual Allerton Conference on Communication, Control and Computing 2005 - Monticello, United States Duration: Sep 28 2005 → Sep 30 2005 |
Other
Other | 43rd Annual Allerton Conference on Communication, Control and Computing 2005 |
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Country/Territory | United States |
City | Monticello |
Period | 9/28/05 → 9/30/05 |
ASJC Scopus subject areas
- Computer Networks and Communications
- Computer Science Applications