Power allocation for interference channels

Chaitanya, Krishna A and Mukherji, Utpal and Sharma, Vinod (2013) Power allocation for interference channels. In: 2013 National Conference on Communications (NCC), 15-17 Feb. 2013, New Delhi, India.

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Abstract

We propose power allocation algorithms for increasing the sum rate of two and three user interference channels. The channels experience fast fading and there is an average power constraint on each transmitter. Our achievable strategies for two and three user interference channels are based on the classification of the interference into very strong, strong and weak interferences. We present numerical results of the power allocation algorithm for two user Gaussian interference channel with Rician fading with mean total power gain of the fade Omega = 3 and Rician factor kappa = 0.5 and compare the sum rate with that obtained from ergodic interference alignment with water-filling. We show that our power allocation algorithm increases the sum rate with a gain of 1.66dB at average transmit SNR of 5dB. For the three user Gaussian interference channel with Rayleigh fading with distribution CN(0, 0.5), we show that our power allocation algorithm improves the sum rate with a gain of 1.5dB at average transmit SNR of 5dB.

Item Type:	Conference Paper
Series.:	National Conference on Communications NCC
Publisher:	IEEE
Additional Information:	Copyright of this article belongs to IEEE.
Keywords:	Interference Channel; Power Allocation; Augmented Lagrangian Method; Ergodic Interference Alignment
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	30 Jul 2013 12:02
Last Modified:	30 Jul 2013 12:02
URI:	http://eprints.iisc.ac.in/id/eprint/46924

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