New Achievable Rates for Gaussian Partially Cognitive Interference Channels With Multiple Cognitive Pairs
2014 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 62, no 6, 2051-2060 p.Article in journal (Refereed) Published
This paper characterizes achievable rate regions for the Gaussian partially cognitive interference channel with multiple cognitive pairs (K-PCIFC), where the cognitive transmitters know one part of the primary transmitter's message. We explore a novel methodology using the deterministic discrete superposition model (DSM). We find codes and their achievable rate regions in the DSM, and we show that they yield achievable rate regions in the Gaussian model. Our coding scheme in the DSM can be applied in general scenarios. We devise an achievable rate region for the K-PCIFC, which is within a constant gap to known outer bounds for K = 2 in the weak interference regime. From our expressions we derive guidelines for designing the cognitive link between the primary transmitter and the cognitive transmitters. Furthermore, we show that the gain from cognition diminishes for increasing K.
Place, publisher, year, edition, pages
2014. Vol. 62, no 6, 2051-2060 p.
Interference channels, cognitive radio, AWGN channels, channel models, achievable rates
Telecommunications Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-148321DOI: 10.1109/TCOMM.2014.2321566ISI: 000338029200024ScopusID: 2-s2.0-84903193113OAI: oai:DiVA.org:kth-148321DiVA: diva2:736347
FunderSwedish Research Council
QC 201408062014-08-062014-08-052014-08-06Bibliographically approved