Combining beamforming with Alamouti scheme for multiuser MIMO communications

Author

Sun, Chen ; Karmakar, Nemai C. ; Lim, Khoon Seong ; Feng, Aigang

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

Volume

2

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

1415

Abstract

We combine optimum receive beamforming with the Alamouti space-time block code (STBC) transmission and modify the decoding process. In a multiuser multiple-input multiple-output (MIMO) communications scenario, the beamformer suppresses cochannel interference (CCI) by maximizing the uplink signal-to-noise-plus-interference ratio (SINR). It is shown that the beamforming process increases the bit-error-rate (BER) performance and maximizes the available uplink channel capacity for each user in the presence of CCI. The ergodic capacity of a conventional 2-by-1 Alamouti scheme is also increased from 3.2 to 4 bits/s/Hz by adding one receive antenna.

Keywords

MIMO systems; antenna arrays; block codes; channel capacity; cochannel interference; decoding; diversity reception; error statistics; interference suppression; multiuser channels; optimisation; space-time codes; Alamouti STBC communications; Alamouti space-time block code communications; BER; CCI suppression; bit-error-rate; cochannel interference suppression; diversity array antennas; ergodic capacity; multiuser MIMO communications; optimum receive beamforming; receive antenna; space-time code; uplink SINR maximization; uplink channel capacity maximization; uplink signal-to-noise-plus-interference ratio maximization; Array signal processing; Bit error rate; Block codes; Channel capacity; Decoding; Interchannel interference; MIMO; Radiofrequency interference; Receiving antennas; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400257

Filename

1400257