Frame-extended linear decorrelating detector for asynchronous CDMA

Author

Peng, Mengkang ; Sasabo, M.F. ; Guo, Yingjie Jay ; Downing, Oliver J. ; Barton, Stephen K.

Author_Institution

Ericsson Mobile Commun. Ltd., UK

Volume

49

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

1918

Lastpage

1927

Abstract

The standard linear decorrelating detector (LDD) for asynchronous code-division multiple access involves complicated computations and long detection delay. The one-shot LDD with a frame of 1-bit period length leads to a simpler architecture with less than 1-bit detection delay but significant noise enhancement compared with the standard LDD. In this paper, extending the frame to more than one bit period, a frame-extended LDD (FELDD) is proposed. With a slight increase of complexity and detection delay, the noise enhancement of the FELDD is greatly reduced compared with the one-shot LDD and approaches that of the standard DD. The total number of users supported is also increased compared with that of the one-shot LDD. Theoretical analysis and computer simulations are used to demonstrate the feasibility of the proposed scheme

Keywords

AWGN; code division multiple access; decorrelation; delays; multiuser channels; signal detection; AWGN; asynchronous CDMA; asynchronous code-division multiple access; computer simulations; detection delay; frame-extended LDD; frame-extended linear decorrelating detector; linear decorrelating detector; noise enhancement; one-shot LDD; period length; Code division multiplexing; Code standards; Computer architecture; Computer simulation; Decorrelation; Delay; Detectors; Multiaccess communication; Noise reduction; Scholarships;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.892594

Filename

892594