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Capacity distribution for interference alignment with CSI errors and its applications

Guiazon, RF; Wong, K-K; Fitch, M; (2016) Capacity distribution for interference alignment with CSI errors and its applications. IEEE Transactions on Wireless Communications , 15 (1) pp. 676-685. 10.1109/TWC.2015.2477298. Green open access

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Abstract

Interference alignment (IA) is known to achieve the degree-of-freedom (DoF) capacity of the interference channel, if full channel state information (CSI) is available at the transmitters perfectly. Challenges, however, arise when CSI is not perfect, and the achievable capacity of IA is not well understood. In this paper, we study the achievable performance of the interference channel using perfect IA techniques based on imperfect CSI. In particular, we obtain the statistical distribution of the maximum achievable rate per stream of the channel. Utilizing our analytical results, we derive new nonasymptotic performance metrics that are then used to 1) optimize the number of streams per user for maximizing the network sum-rate and 2) assess the performance of IA in the time-varying block fading channel. Numerical results are provided to reveal the accuracy of our analytical results.

Type: Article
Title: Capacity distribution for interference alignment with CSI errors and its applications
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2015.2477298
Publisher version: http://dx.doi.org/10.1109/TWC.2015.2477298
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1501119
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