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Optimal single-port matching impedance for capacity maximization in compact MIMO arrays

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Author

Summary, in English

A complete MIMO system model with compact arrays at both link ends containing arbitrary matching networks is presented based on a Z-parameter approach. The complete channel matrix including the coupling effect is also presented. Utilizing this system model, the optimum single-port matching impedance for capacity maximization is derived for a 2 × 2 MIMO system with coupling at the receivers only. A closed-form result for the optimum matching impedance in high signal-to-noise ratio scenarios is given and proved to be equal to the input impedance of the receive end. Simulation of ideal dipoles verifies our analytical results and demonstrates the superiority of the optimum matching to other matching conditions in improving MIMO system performance. Experimental data for monopoles is also presented to further confirm our numerical findings and validate the accuracy of our derivation.

Publishing year

2008

Language

English

Pages

3566-3575

Publication/Series

IEEE Transactions on Antennas and Propagation

Volume

56

Issue

11

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Status

Published

Project

  • Radiosystem: MIMO technology in compact multiband antenna systems (Vinnova/SonyEricsson, BKL)
  • Radiosystem: NEWCOM (EU, JBA)

Research group

  • Radio Systems
  • Electromagnetic theory

ISBN/ISSN/Other

  • ISSN: 0018-926X