Journal of Advanced Navigation Technology (한국항행학회논문지)
- Volume 7 Issue 1
- /
- Pages.6-13
- /
- 2003
- /
- 1226-9026(pISSN)
- /
- 2288-842X(eISSN)
Design and Performance Analysis of Non-coherent Code Tracking Loops for HSDPA MODEM
HSDPA 모뎀용 동기추적회로의 설계 및 성능분석
- Yang, Yeon-Sil (School of Electronics, Telecommunications and Computer Engineering, Hankuk Aviation University) ;
- Park, Hyung-Rae (School of Electronics, Telecommunications and Computer Engineering, Hankuk Aviation University)
- Received : 2002.12.02
- Published : 2003.06.30
Abstract
In this paper, a non-coherent code tracking loop is designed for 3GPP HSDPA MODEM and its performance is analyzed in terms of steady-state jitter variance and transient response characteristics. Analytical closed-form formula for steady-state jitter variance is first derived for AWGN environments as a function of pulse-shaping filter, timing offset, signal-to-interference ratio, and loop bandwidth. Also obtained is the transient response characteristic of a tracking loop. Finally, the performance of the designed tracking loop is confirmed by computer simulations.
본 논문에서는 3GPP HSDPA 모뎀용 비동기식 동기추적회로를 설계하고, 설계된 동기추적회로에 대하여 정상상태 지터 분산과 타이밍 에러의 과도응답 특성을 이론적으로 분석하였다. 우선 AWGN 환경에서의 지터 분산을 펄스성형 필터, 타이밍 오프셋, 신호 대 잡음비, 루프 대역폭에 대한 식으로 유도하였으며, 과도응답 특성 또한 이론적으로 해석하였다. 끝으로 설계된 동기추적회로의 성능을 컴퓨터 시뮬레이션을 통하여 확인하였다.