Secure Beamforming via Amplify-and-Forward Relays in Machine-to-Machine Communications
نویسندگان
چکیده
منابع مشابه
Cooperative Amplify–and–Forward Beamforming for OFDM Systems with Multi–Antenna Relays
In this paper, we propose a beamforming (BF) scheme for cooperative orthogonal frequency division multiplexing (OFDM) networks with multiple amplify–and–forward (AF) relays equipped with arbitrary numbers of antennas. Adopting the average mutual information (AMI) per sub–carrier as optimality criterion, we obtain closed–form expressions for the directions of the optimal BF weights at the source...
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ژورنال
عنوان ژورنال: International Journal of Distributed Sensor Networks
سال: 2013
ISSN: 1550-1477,1550-1477
DOI: 10.1155/2013/728532