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Transmitting Array Antenna Beamforming Based on Goal Programming for Forward Link of DS-CDMA System
Tsuguhide AOKI Norimichi HIRANO Ryuji KOHNO
IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Application to CDMA
DS-CDMA, multiple access interference, array antenna, TPC, goal programming,
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This paper investigates the improvement of the radiation pattern design of transmitting array antenna beamforming and transmission power control (TPC) for forward link of DS-CDMA/FDD system. Optimum transmission beamforming and TPC can be derived from the information of the propagation channel for the forward link, in terms of outage probability minimization. It is assumed that the channel is static and then all mobile stations (MS's) report channel characteristics measured in the forward link to a base station (BS) that can control signal to interference plus noise ratios (SINR's) received by individual MS's using that measured information. Then, for the multi-user environment of a single cell, goal programming (GP) is applied to derive an optimum weight vector of the transmitting array antenna and optimum TPC such that outage probability can be minimized.