Spread-time CDMA performance with and without windowing

Author

Shayesteh, Mahrokh G. ; Nasiri-Kenari, Masoumeh ; Salehi, Jawad A.

Author_Institution

Dept. of Electr. Eng., Amir Kabir Univ. of Tech., Tehran, Iran

Volume

3

fYear

2002

fDate

15-18 Sept. 2002

Firstpage

1166

Abstract

We compute the outputs of matched filters for spread-time CDMA with and without the effect of window which is used for truncating the resulting pulse. We obtain the signal to interference plus noise ratio (SIR) in both cases and compare the results. We examine the effect of different multiuser detectors used for spread spectrum (SS) in spread-time (ST). It is shown that ST and SS have the same performance while ST has the ability of matching the transmitted spectrum to the channel. Furthermore we consider the effect of synchronization error in the absence of any window. It is shown that synchronization error in timing causes infinite ISI terms that do not converge.

Keywords

AWGN channels; code division multiple access; filtering theory; intersymbol interference; matched filters; multiuser detection; spread spectrum communication; synchronisation; timing; AWGN asynchronous channels; AWGN synchronous channels; ISI; SIR; matched filters; multiuser detectors; performance; pulse truncation; signal to interference plus noise ratio; spread spectrum communication; spread-time CDMA performance; synchronization error; timing; transmitted spectrum; windowing; AWGN; Bandwidth; Detectors; Fourier transforms; Interference; Matched filters; Multiaccess communication; Pulse modulation; Shape; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on

Print_ISBN

0-7803-7589-0

Type

conf

DOI

10.1109/PIMRC.2002.1045211

Filename

1045211