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Design and Performance Analysis of a Noncoherent Code Tracking Loop for 3GPP MODEM  

양연실 (한국항공대학교 대학원 정보통신공학과)
박형래 (한국항공대학교 대학원 정보통신공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.12A, 2003 , pp. 983-990 More about this Journal
Abstract
In this paper, a noncoherent code tracking loop is designed for 3GPP MODEM and its performance is analyzed in terms of steady-state jitter variance and transient response characteristics. An analytical closed-form formula for steady-state jitter variance is Int derived for AWGN environments as a general function of a pulse-shaping filter, timing offset, signal-to-interference ratio, and loop bandwidth, together with the analysis on the transient response characteristic of a tracking loop. Based on the analysis, the code tracking loop with variable loop bandwidth that is efficient for full digital H/W implementation is designed and its performance is compared with that of the code tracking loop with fixed loop bandwidth, along with the verification by computer simulations.
Keywords
code tracking loop; 3GPP; delay-locked loop;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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