An iterative receiver for layered space-time MIMO DS-CDMA uplink using turbo trellis-coded modulation

Author

Jeong, J.H. ; Kavehrad, M.

Author_Institution

Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA

Volume

1

fYear

2005

fDate

13-17 March 2005

Firstpage

320

Abstract

An iterative turbo receiver is proposed for the uplink of a MIMO CDMA system employing layered space-time transmission. The proposed receiver consists of a low-complexity layered space-time multiuser detector using linear minimum mean squared error (MMSE) filtering with a-priori information and parallel a-posteriori probability (APP) computing soft-input soft-output (SISO) decoders. Turbo trellis-coded modulation (TTCM) is used as error-correcting tool to achieve bandwidth efficient transmission. Computer simulation results show that the proposed receiver using an iterative operation along with the detector and decoders outperforms an iterative receiver based on parallel interference cancellation as well as a non-iterative MMSE receiver. Furthermore, while providing an increase in system capacity, the proposed receiver offers an error performance similar to that of the single-user case at high SNR, in a multiuser environment.

Keywords

MIMO systems; code division multiple access; decoding; error correction; filtering theory; iterative methods; least mean squares methods; multiuser detection; parallel processing; probability; radio receivers; spread spectrum communication; trellis coded modulation; turbo codes; MIMO CDMA system; SISO decoders; TTCM; a-posteriori probability; a-priori information; bandwidth efficient transmission; error correction; iterative receiver; iterative turbo receiver; layered space-time MIMO DS-CDMA uplink; linear MMSE filtering; linear minimum mean squared error filtering; multiuser detector; noniterative MMSE receiver; parallel interference cancellation; soft-input soft-output decoders; turbo trellis-coded modulation; Bandwidth; Computer errors; Concurrent computing; Detectors; Information filtering; Information filters; Iterative decoding; MIMO; Multiaccess communication; Nonlinear filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2005 IEEE

ISSN

1525-3511

Print_ISBN

0-7803-8966-2

Type

conf

DOI

10.1109/WCNC.2005.1424520

Filename

1424520