Noncoherent adaptive code synchronization for DS/CDMA systems

Author

Yu, Takki ; Kwun, Jonghyung ; Hyounggoo Jeon ; Hong, Daesik ; Kang, Changeon

Author_Institution

Dept. of Electron., Yonsei Univ., Seoul, South Korea

Volume

6

fYear

2001

fDate

2001

Firstpage

3311

Abstract

In this paper, a noncoherent adaptive code acquisition scheme is proposed by combining an adaptive filter with a differential detector. The carrier phase offset in the PN signal component of the filter input is removed by a differential detector. The probabilities for detection and false alarm are derived, and the mean acquisition time is evaluated under AWGN channel. The performance of the proposed system is compared with the conventional system using a matched filter. Simulation results show that the proposed system has a good performance under overall channel conditions, especially at low SNR. And the proposed system outperforms the matched filter by 4-6 dB under AWGN channel for 16 taps, as measured by the mean acquisition time

Keywords

AWGN channels; adaptive codes; adaptive filters; channel coding; code division multiple access; differential detection; mobile radio; phase estimation; probability; pseudonoise codes; spread spectrum communication; synchronisation; AWGN channel; DS-CDMA systems; PN signal component; adaptive filter; carrier phase offset; detection probability; differential detector; false alarm probability; mean acquisition time; noncoherent adaptive code acquisition; performance; synchronization; AWGN channels; Adaptive coding; Adaptive filters; Additive white noise; Delay effects; Detectors; Gaussian noise; Matched filters; Multiaccess communication; Time measurement;

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.2001.966299

Filename

966299