Performance analysis of digital delay lock loops in the presence of Doppler shift

@inproceedings{citeulike:2819802, abstract = {The delay lock loop is a well-developed technique to track the pseudo-noise codes for spread-spectrum systems. In previous papers the first-order loop was analyzed in the absence of Doppler shift. However, under severe Doppler environment, such as low-earth-orbit (LEO) satellite communication, the tracking of PN code will be difficult for the first-order loop. This paper considers discrete time analyses of first- and second-order digital delay lock loops (DDLL), and presents the results of an investigation concerning the performance degradation due to Doppler. The performance measures evaluated include the steady-state timing error probability density function (pdf) and the mean time to lose lock. The measures are characterized in terms of the Doppler shift and the loop signal-to-noise ratio. Moreover, approximate expressions for the steady-state timing error probability density and the mean time to lose lock are also presented for the first- and second-order digital delay lock loops. The analyses are confirmed by numerical results and simulation}, author = {Su, Szu-Lin and Yen, Nan-Yang and Hsieh, Sheng-Cheng }, booktitle = {Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on}, citeulike-article-id = {2819802}, doi = {http://dx.doi.org/10.1109/ICC.1995.524527}, journal = {Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on}, keywords = {dll, doppler, tracking}, pages = {1896--1900 vol.3}, posted-at = {2008-05-21 13:55:49}, priority = {2}, title = {Performance analysis of digital delay lock loops in the presence of Doppler shift}, url = {http://dx.doi.org/10.1109/ICC.1995.524527}, volume = {3}, year = {1995} }

TY - CONF ID - citeulike:2819802 L3 - citeulike-article-id:2819802 TI - Performance analysis of digital delay lock loops in the presence of Doppler shift T2 - Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on JF - Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on VL - 3 SP - 1896 EP - 1900 vol.3 N2 - The delay lock loop is a well-developed technique to track the pseudo-noise codes for spread-spectrum systems. In previous papers the first-order loop was analyzed in the absence of Doppler shift. However, under severe Doppler environment, such as low-earth-orbit (LEO) satellite communication, the tracking of PN code will be difficult for the first-order loop. This paper considers discrete time analyses of first- and second-order digital delay lock loops (DDLL), and presents the results of an investigation concerning the performance degradation due to Doppler. The performance measures evaluated include the steady-state timing error probability density function (pdf) and the mean time to lose lock. The measures are characterized in terms of the Doppler shift and the loop signal-to-noise ratio. Moreover, approximate expressions for the steady-state timing error probability density and the mean time to lose lock are also presented for the first- and second-order digital delay lock loops. The analyses are confirmed by numerical results and simulation KW - dll KW - doppler KW - tracking AU - Su, Szu-Lin AU - Yen, Nan-Yang AU - Hsieh, Sheng-Cheng PY - 1995/// UR - http://dx.doi.org/10.1109/ICC.1995.524527 ER -