Title :
Hybrid beamforming using convex optimization for SDMA in millimeter wave radio
Author :
Wu, Sau-Hsuan ; Lin, Ko-Yen ; Chiu, Lin-Kai
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A radio-frequency and baseband hybrid beam-forming (HBF) scheme is presented for spatial division multiple access (SDMA) of 60 GHz applications using planar antenna arrays (PAA). PAA with phase shifters for each element antenna is partitioned into sub-blocks and each block is applied a common baseband beamforming weight. To suppress the grating lobes of beam pattern and to maintain the signal to interference plus noise ratio (SINR) of users in the SDMA system, we study the design of this HBF using convex optimization. Two design criteria are considered herein: one minimizes the transmit power subject to a SINR constraint, and the other maximizes the worst case SINR subject to a total power constraint. Simulation results show that both the SINR and directivity of HBF can be significantly improved by making use of the convex optimization technique.
Keywords :
antenna radiation patterns; array signal processing; millimetre wave antenna arrays; optimisation; phase shifters; planar antenna arrays; space division multiple access; SDMA system; SINR constraint; baseband hybrid beamforming scheme; beam pattern; convex optimization; millimeter wave radio; phase shifters; planar antenna arrays; radiofrequency hybrid beamforming scheme; signal-to-interference-plus-noise ratio; spatial division multiple access; Antenna arrays; Array signal processing; Baseband; Interference constraints; Millimeter wave technology; Multiaccess communication; Phase shifters; Planar arrays; Radio frequency; Signal to noise ratio; Planar antenna arrays; SDMA; convex optimization and 60GHz millimeter wave; hybrid beamforming;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5449993