Title :
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
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;
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
DOI :
10.1109/PIMRC.2007.4394270
