Capacity Bounds for Two-Hop Interference Networks

Details Capacity Bounds for Two-Hop Interference Networks Capacity Bounds for Two-Hop Interference Networks

2009-10-08

arxiv.org/abs/0910.1532v1

Computer Science

Information Theory

8 pages, 5 figures, presented in Allerton Conference'09

Scientific paper

This paper considers a two-hop interference network, where two users transmit independent messages to their respective receivers with the help of two relay nodes. The transmitters do not have direct links to the receivers; instead, two relay nodes serve as intermediaries between the transmitters and receivers. Each hop, one from the transmitters to the relays and the other from the relays to the receivers, is modeled as a Gaussian interference channel, thus the network is essentially a cascade of two interference channels. For this network, achievable symmetric rates for different parameter regimes under decode-and- forward relaying and amplify-and-forward relaying are proposed and the corresponding coding schemes are carefully studied. Numerical results are also provided.

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