Downlink beamforming performance for an SDMA terminal with joint detection

Author

Nishimura, Toshihiko ; Ohgane, Takeo ; Ogawa, Yasutaka ; Doi, Yoshiharu ; Kitakado, Jun

Author_Institution

Graduate Sch. of Eng., Hokkaido Univ., Sapporo, Japan

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1538

Abstract

We discuss downlink beamforming methods in consideration of a terminal having a joint detector function for space division multiple access (SDMA) in both a multi-input single-output (MISO) channel and a multi-input multi-output (MIMO) channel. We investigate two methods; a general beamformer, which maximizes the desired signal´s power at the receiver (a transmit MRC diversity) and a null steering concept, which avoids the interference signal reaching the receiver. The computer simulation results show that the null steering concept yields better performance compared to the beam steering, even considering the joint detection at the receiver

Keywords

MIMO systems; antenna arrays; beam steering; cellular radio; diversity reception; radiofrequency interference; signal detection; space division multiple access; MIMO channel; MISO channel; SDMA terminal; downlink beamforming methods; interference signal; joint detection; mobile radio; multi-input multi-output channel; multi-input single-output channel; null steering concept; space division multiple access; transmit MRC; transmit diversity; transmit maximal ratio combining; Array signal processing; Base stations; Beam steering; Diversity reception; Downlink; Gas detectors; Interference; MIMO; Maximum likelihood detection; Multiaccess communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th

Conference_Location

Atlantic City, NJ

ISSN

1090-3038

Print_ISBN

0-7803-7005-8

Type

conf

DOI

10.1109/VTC.2001.956455

Filename

956455