A zero-forcing multiuser transmitter preprocessing scheme for downlink communications

Author

Yang, Lie-Liang

Author_Institution

Sch. of Electron. & Comput. Sci., Southampton Univ., Southampton

Volume

56

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

862

Lastpage

865

Abstract

In this letter a multiuser transmitter preprocessing (MUTP) approach is proposed for downlink wireless communications, such as in spatial-division multiple-access (SDMA) or direct-sequence code-division multiple-access (DS-CDMA) system. In the proposed MUTP the preprocessing matrix is obtained by constructing a subspace that is orthogonal to the interference subspace without relying on eigen-analysis. The proposed MUTP fully removes the downlink multiuser interference, resulting in the zero-forcing (ZF) solution. It is capable of achieving the same bit error rate (BER) performance as the conventional ZF-based MUTP (ZF-MUTP).

Keywords

code division multiple access; error statistics; matrix algebra; radio links; radio transmitters; radiofrequency interference; spread spectrum communication; BER performance; DS-CDMA system; SDMA system; bit error rate; direct-sequence code-division multiple-access; downlink wireless communications; interference subspace; multiuser transmitter preprocessing; preprocessing matrix; spatial-division multiple-access; zero-forcing MUTP scheme; Bit error rate; Context; Downlink; Interference suppression; MIMO; Multiaccess communication; Signal processing; Transmitters; Transmitting antennas; Wireless communication;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2008.060354

Filename

4542740