A de-correlated modified code tracking loop for synchronous direct-sequence code-division multiple-access systems

Author

Wong, W.K. ; Leung, C.W.

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, China

Volume

6

fYear

2001

fDate

2001

Firstpage

3434

Abstract

A de-correlated modified code tracking loop (D-MCTL) is presented for synchronous direct-sequence code-division multiple-access (DS/CDMA) systems. It is found that the S curve of a traditional modified code tracking loop (MCTL) may be severely distorted; even the multiple access interference (MAI) is low at the ideal sampling instant. The proposed D-MCTL alleviates the effect of MAI at ±1 chip interval caused by interfering users and achieves a better S curve with a zero timing offset. Computer simulations based on Gold code sequences are used to verify the results

Keywords

code division multiple access; codes; decorrelation; multiuser channels; radio tracking; radiofrequency interference; sequences; spread spectrum communication; Gold code sequences; S curve; computer simulations; de-correlated modified code tracking loop; direct-sequence code-division multiple-access; modified code tracking loop; multiple access interference; synchronous DS/CDMA systems; zero timing offset; Computer simulation; Delay; Gold; Modulation coding; Multiaccess communication; Multiple access interference; Sampling methods; Signal processing; Timing; Tracking loops;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE

Conference_Location

San Antonio, TX

Print_ISBN

0-7803-7206-9

Type

conf

DOI

10.1109/GLOCOM.2001.966319

Filename

966319