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Sum-Rate Maximization Technique for Spectrum-Sharing MIMO OFDM Broadcast Channels

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3 Author(s)
Jie Tang ; Advanced Signal Processing Group, Loughborough University, Loughborough, U.K. ; Kanapathippillai Cumanan ; Sangarapillai Lambotharan

We investigate weighted sum-rate maximization and rate-balancing problems for spectrum-sharing multiple-input-multiple-output orthogonal frequency-division-multiplexing (MIMO OFDM) based broadcast channels. The problem is solved by converting the MIMO OFDM channel into a block-diagonal form and applying the principle of multiple-access channel-broadcast channel (MAC-BC) duality. The algorithm in its dual form is solved using subgradient methods. The simulation results demonstrate the convergence of the algorithms.

Published in:

IEEE Transactions on Vehicular Technology  (Volume:60 ,  Issue: 4 )