Fixed-Rate Transmission Over Fading Interference Channels Using Point-to-Point Gaussian Codes
Journal article, 2015

This paper investigates transmission schemes for fixed-rate communications over a Rayleigh block-fading interference channel. There are two source-destination pairs where each source, in the presence of a short-term power constraint, intends to communicate with its dedicated destination at a fixed data rate. It encodes its messages using a point-to-point Gaussian codebook. The two users' transmissions can be conducted orthogonally or non-orthogonally. In the latter case, each destination performs either direct decoding by treating the interference as noise, or successive interference cancellation (SIC) to recover its desired message. For each scheme, we seek solutions of a power control problem to efficiently assign power to the sources such that the codewords can be successfully decoded at destinations. However, because of the random nature of fading, the power control problem for some channel realizations may not have any feasible solution and the transmission will be in outage. Thus, for each transmission scheme, we first compute a lower bound and an upper bound on the outage probability. Next, we use these results to find an outer bound and an inner bound on the \epsilon-outage achievable rate region, i.e., the rate region in which the outage probability is below a certain value \epsilon.

block fading

successive interferes cancelation

power control

Interference channel

point-to-point codes


Hamed Farhadi

Chalmers, Signals and Systems, Systems and control, Automatic Control

Chao Wang

Tongji University

Mikael Skoglund

Royal Institute of Technology (KTH)

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 63 10 3633 - 3644 7217821

Subject Categories


Communication Systems

Signal Processing



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