Outage behavior of slow fading channels with power control using noisy quantized CSIT

Simple item page
dc.creatorEkbatani, Siavash
dc.creatorEtemadi, Farzad
dc.creatorJafarkhani, Hamid
dc.date2008-04-04
dc.date.accessioned2026-07-07T09:30:32Z
dc.date.available2026-07-07T09:30:32Z
dc.descriptionThe topic of this study is the outage behavior of multiple-antenna slow fading channels with quantized feedback and partial power control. A fixed-rate communication system is considered. It is known from the literature that with error-free feedback, the outage-optimal quantizer for power control has a circular structure. Moreover, the diversity gain of the system increases polynomially with the cardinality of the power control codebook. Here, a similar system is studied, but when the feedback link is error-prone. We prove that in the high-SNR regime, the optimal quantizer structure with noisy feedback is still circular and the optimal Voronoi regions are contiguous non-zero probability intervals. Furthermore, the optimal power control codebook resembles a channel optimized scalar quantizer (COSQ), i.e., the Voronoi regions merge with erroneous feedback information. Using a COSQ, the outage performance of the system is superior to that of a no-feedback scheme. However, asymptotic analysis shows that the diversity gain of the system is the same as a no-CSIT scheme if there is a non-zero and non-vanishing feedback error probability.
dc.descriptionSubmitted to IEEE Transactions on Information Theory, April 2008
dc.identifierhttps://arxiv.org/abs/0804.0790
dc.identifierhttp://arxiv.org/abs/0804.0790
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158153
dc.subjectInformation Theory
dc.titleOutage behavior of slow fading channels with power control using noisy quantized CSIT
dc.typetext

Files

Collections

arXiv