Selection Relaying With Transmit Beamforming: A Comparison of Fixed and Variable Gain Relaying

This paper presents a comparison and analysis of selection relaying with transmit beamforming as an effective approach to combat channel impairments in relay-assisted cellular networks. The authors consider the downlink scenario where the base station equipped with N antennas transmits to the mobile station either directly, or indirectly via a relay station, according to the link with the strongest received Signal-to-Noise Ratio (SNR). They compare two amplify-and-forward protocols: fixed gain relaying which requires partial Channel State Information (CSI), and variable gain relaying which requires full CSI.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Jun 2011 Format: PDF

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