Adaptive Window Length Estimation for Channel Estimation in CDMA Receivers

Author

Asyhari, Agustian Taufiq ; Oh, Ser Wah ; Li, Kwok Hung ; Teh, Kah Chan

Author_Institution

Nanyang Technol. Univ., Singapore

fYear

2007

fDate

3-7 Sept. 2007

Firstpage

1

Lastpage

5

Abstract

In this paper, an adaptive window length estimation for channel estimation in direct-sequence (DS) code-division multiple-access (CDMA) receivers is presented. The estimated optimum window length is derived based on autocovariance analysis of the estimated channel coefficients. As the propagation channel changes over time, an adaptive algorithm for updating the window length is proposed through Doppler and signal-to-noise ratio (SNR) estimations. The proposed system improves the performance by adaptively selecting and continuously updating the window lengths over a wide-range of velocities (5 to 400 kmph).

Keywords

Doppler effect; adaptive estimation; channel estimation; code division multiple access; radio receivers; spread spectrum communication; CDMA receivers; Doppler estimations; adaptive window length estimation; autocovariance analysis; channel estimation; direct-sequence code-division multiple-access; propagation channel; signal-to-noise ratio estimations; Adaptive algorithm; Channel estimation; Downlink; Fading; Land mobile radio; Mobile communication; Multiaccess communication; Receivers; Signal to noise ratio; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on

Conference_Location

Athens

Print_ISBN

978-1-4244-1144-3

Electronic_ISBN

978-1-4244-1144-3

Type

conf

DOI

10.1109/PIMRC.2007.4394270

Filename

4394270