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Interference Suppression with Downlink Beamforming for a TDD-Based OFDMA System

Eunchul YOON, Sun-Yong KIM, Suhan CHOI, Hichan MOON

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Summary :

The downlink beamforming weights which can suppress interfering signals toward out-of-cell mobile stations for a TDD-based OFDMA system are introduced. First, the downlink beamforming weights are optimally designed based on iteration. Then, the downlink beamforming weights are designed in a sub-optimal way. It is shown that the sub-optimally designed downlink beamforming weights have the same structure as that of the uplink beamforming weights which are derived based on MMSE. The performance of these schemes is compared based on the average receive SINR. The performance of a heuristic scheme which exploits uplink beamforming weights for downlink beamforming weights is also investigated.

Publication
IEICE TRANSACTIONS on Communications Vol.E92-B No.2 pp.666-670
Publication Date
2009/02/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E92.B.666
Type of Manuscript
LETTER
Category
Wireless Communication Technologies

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