Filter-and-Forward Relay Design for OFDM Systems for Quality-of-Service Enhancement

Provided by: Institute of Electrical & Electronic Engineers
Topic: Mobility
Format: PDF
In this paper, the Filter-and-Forward (FF) relay design for OFDM communication systems is considered to enhance the system performance over the conventional Amplify-and-Forward (AF) relaying scheme. The considered design criterion in this paper is to maximize the worst subcarrier channel Signal-to-Noise Ratio (SNR) subject to the total relay transmit power constraint in order to improve the overall transmission quality-of-service. It is shown, by exploiting the eigen-property of circulant matrices and the structure of Toeplitz matrices that the considered problem reduces to a Semi-Definite Programming (SDP) problem. Numerical results are provided to validate the authors' design method and the numerical results show that the proposed FF relay outperforms the AF scheme significantly.

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