Adaptive CDMA Multipath Delay Trackerfor Closely Spaced Multipaths

Author

Yao, Tianxiang ; Zhu, Jiangli ; Huang, Aiping ; Ye, Xiuqing ; Gu, Weikang

Author_Institution

Inst. of Inf. Syst. & Electron. Eng., Zhejiang Univ., Hangzhou

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1884

Lastpage

1887

Abstract

CDMA based third generation mobile communication adopts Rake receiver to get diversity gain for multipath signals. This paper first analyzes why traditional CDMA delay tracker fails when multipaths are closely spaced (1-2 chips apart). Then we propose a novel adaptive coherent CDMA tracking loop. This new structure uses an adaptive delay detector which is able to suppress the disturbance from neighboring multipath components. Experiments show our method can track multipath profiles with 1-2 chips apart. The proposed structure is also low in complexity. It´s well suited for the downlink tracking in WCDMA/cdma2000 standard

Keywords

3G mobile communication; code division multiple access; diversity reception; radio receivers; CDMA tracking loop; Rake receiver; WCDMA; adaptive CDMA multipath delay tracker; cdma2000 standard; closely spaced multipaths; diversity gain; multipath signals; third generation mobile communication; 3G mobile communication; Delay; Detectors; Diversity methods; Downlink; Fading; Failure analysis; Multiaccess communication; Multipath channels; Tracking loops; CDMA; DLL; Rake receiver; closely-spaced multipath; coherent TED;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683174

Filename

1683174