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

Author

Tang, Jie ; Cumanan, Kanapathippillai ; Lambotharan, Sangarapillai

Author_Institution

Adv. Signal Process. Group, Loughborough Univ., Loughborough, UK

Volume

60

Issue

4

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

1960

Lastpage

1964

Abstract

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.

Keywords

MIMO communication; OFDM modulation; broadcast channels; multi-access systems; optimisation; MAC-BC duality; block-diagonal form; multiple-access channel-broadcast channel duality; multiple-input-multiple-output orthogonal frequency-division-multiplexing; spectrum-sharing MIMO OFDM broadcast channel; subgradient method; sum-rate maximization technique; Convergence; Covariance matrix; Interference; MIMO; Noise; OFDM; Optimization; Broadcast channels (BCs); cognitive radio; multiple input–multiple output (MIMO); orthogonal frequency-division multiplexing (OFDM); sum-rate maximization;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2011.2123927

Filename

5725202