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ICC
2007
IEEE

Digital Code Tracking Loops Over Frequency-Selective Fading Channels

14 years 5 months ago
Digital Code Tracking Loops Over Frequency-Selective Fading Channels
Abstract— The performance of a noncoherent digital delaylock loop (DDLL) with a RAKE scheme for direct-sequence spread-spectrum code division multiple access (DS/SS-CDMA) signals over frequency-selective Rayleigh fading channels is discussed. Closed-form expressions for the transition timing error probability density function (PDF) of the Chapman-Kolmogorov (C-K) equations of the first- and second-order loops are derived for driving analytical expressions of the steady-state timing error PDF. Furthermore, the statistics of the tracking error are scrutinized and verified via computer simulations, such as the mean square tracking error (MSTE) and Cram´er-Rao lower bound (CRLB).
Tsan-Ming Wu, Tsung-Hua Tsai
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where ICC
Authors Tsan-Ming Wu, Tsung-Hua Tsai
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