Extended-window decorrelating detector for asynchronous CDMA channels and its performance analysis

Author

Maeng, Seung Joo ; Lee, Byeong Gi

Author_Institution

Samsung Electron. Co. Ltd., Pundang, South Korea

Volume

49

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

35

Lastpage

40

Abstract

We propose a new decorrelating detector for the asynchronous code-division multiple-access channels, called the extended-window decorrelating detector (EW-DD). The EW-DD helps to avoid the noncausality problem of the filter-type decorrelating detector and achieve a simplified detection by converting the asynchronous system into the synchronous one. It also helps to enhance the bit-error rate (BER) performances by utilizing one whole period of information of all users and by eliminating the multiple-access interference from the past data through feedback. Nevertheless, the computational complexity is kept lower than that of other existing decorrelating detectors. We carry out BER analysis of the EW-DD and demonstrate performance improvements of the EW-DD over other decorrelating detectors through computer simulations

Keywords

code division multiple access; computational complexity; decorrelation; error statistics; feedback; interference suppression; multiuser channels; radiofrequency interference; signal detection; spread spectrum communication; BER analysis; BER performance; DS/CDMA; asynchronous CDMA channels; asynchronous code-division multiple-access channels; bit-error rate performance; computational complexity; computer simulations; extended-window decorrelating detector; feedback; multiple-access interference suppression; performance analysis; synchronous system; Bit error rate; Computational complexity; Computer simulation; Decorrelation; Detectors; Feedback; Interference elimination; Multiaccess communication; Multiple access interference; Performance analysis;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.898248

Filename

898248