Research Article
Average Throughput in AWGN Cognitive Fading Interference Channel with Multiple Secondary Pairs
@INPROCEEDINGS{10.4108/icst.crowncom.2012.248335, author={Nicolas Schrammar and Hamed Farhadi and Lars Rasmussen and Mikael Skoglund}, title={Average Throughput in AWGN Cognitive Fading Interference Channel with Multiple Secondary Pairs}, proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2012}, month={7}, keywords={cognitive fading interference channel discrete superposition model deterministic channel model}, doi={10.4108/icst.crowncom.2012.248335} }- Nicolas Schrammar
Hamed Farhadi
Lars Rasmussen
Mikael Skoglund
Year: 2012
Average Throughput in AWGN Cognitive Fading Interference Channel with Multiple Secondary Pairs
CROWNCOM
IEEE
DOI: 10.4108/icst.crowncom.2012.248335
Abstract
We consider the additive white Gaussian noise (AWGN) cognitive fading interference channel consisting of one primary and multiple secondary transmitter-receiver pairs. The secondary transmitters have non-causal knowledge of the primary message. We find a tuple of achievable rates by utilizing the discrete superposition model (DSM), which is a simplified, deterministic channel model. The coding scheme devised for the DSM can be translated into a coding scheme for the AWGN model, where the rate achieved in the AWGN model is at most a constant gap below the rate achieved in the DSM. We then calculate the average throughput of the secondary pairs under the assumption of Rayleigh fading channels. The main result is that our scheme performs well in the weak interference regime. The sum-throughput increases with the number of secondary pairs.