On the low SNR capacity of maximum ratio combining over rician fading channels with full channel state information

Abstract
In this letter, we study the ergodic capacity of a maximum ratio combining (MRC) Rician fading channel with full channel state information (CSI) at the transmitter and at the receiver. We focus on the low Signal-to-Noise Ratio (SNR) regime and we show that the capacity scales as L ΩK+L SNRx log(1SNR), where Ω is the expected channel gain per branch, K is the Rician fading factor, and L is the number of diversity branches. We show that one-bit CSI feedback at the transmitter is enough to achieve this capacity using an on-off power control scheme. Our framework can be seen as a generalization of recently established results regarding the fading-channels capacity characterization in the low-SNR regime. © 2012 IEEE.

Citation
Benkhelifa, F., Rezki, Z., & Alouini, M.-S. (2013). On the Low SNR Capacity of Maximum Ratio Combining over Rician Fading Channels with Full Channel State Information. IEEE Wireless Communications Letters, 2(2), 191–194. doi:10.1109/wcl.2013.011713.120821

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
IEEE Wireless Communications Letters

DOI
10.1109/WCL.2013.011713.120821

arXiv
1301.0730

Additional Links
http://arxiv.org/abs/arXiv:1301.0730v1

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