Browse > Article

Design of an enhanced SIR measurement algorithm for WCDMA mobile station Modem  

Han, Jung-Su (성균관대학교 정보통신공학부)
Doo, Joo-Hyun (성균관대학교 정보통신공학부)
Choi, Hyung-Jin (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.2A, 2005 , pp. 51-60 More about this Journal
Abstract
In this paper, we propose an enhanced SIR measurement algorithm for WCDMA mobile station modem. The proposed algorithm minimizes processing delay by applying velocity estimation-based channel estimator with IIR filter and reduces measured SIR offset by compensating attenuated signal power by using pilot channel(CPICH) in fading channel environment. To improve stability of SIR measurement, we also adopt an IIR filter which can properly reflect variation of fading channel in signal and interference power measurement. We prove that the proposed algorithm outperforms conventional SIR measurement algorithm in mean and jitter of measured SIR. Computer simulation shows that performance results using the proposed algorithm have improvement of approximately 8dB for measured mean and 2dB for measured jitter in the wireless mobile channel, especially in fast mobile speed environment.
Keywords
SIR; WCDMA; CPICH; DPCH; IIR filter; Fading channel;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Joo-Hyun-Do, Yang-Soo-Park and Hyung-Jin Choi, 'Velocity Estimation-Based Channel Estimation for WCDMA Forward Link Receiver,' IEEE TENCON, November 2004
2 Shunsuke Seo, Tomohiro Dohi and Fumiyuki Adachi, 'SIR-Based Transmit Power Control of Reverse Link for Coherent DS-CDMA Mobile Radio,' IEICE Trans. Comm., Vol. E81-B, No.7, pp1508-1516, July 1998
3 Kenichi Higuchi, Hidehiro Andoh, Koichi Okawa and Mamoru Sawahashi, 'Experimental Evaluation of Combined Effect of Coherent Rake Combining and SIR-Based Fast Transmit Power Control for Reverse Link of DSCDMA Mobile Radio,' IEEE JSAC, Vol.18, No.8, pp.1526-1535, Aug. 2000
4 Ariyavisitakul and Li. Fing. Chang, 'Signal and Interference Statistics of a CDMA System with Feedback Power Control,' IEEE Trans. Comm., Vol. 41, Issue. 11, pp.1626-1634, Nov. 1993   DOI   ScienceOn
5 3GPP Technical Specification Group Radio Access Network TS. 25.104, 25.211, 25.213 Release 2003
6 Sang-Mun Lee, Hyung-Jin Choi, 'An Efficient SIR Estimation and Channel Estimation Algorithm considering Power contol in CDMA Systems,' 제 25권, 7호, 한국통신학회, pp.1194-1195, July 2000
7 Fahrner, Dieterich and Fray, 'SIR estimation for fast power control for FDD-UMTS,' IEEE conf. on VTC, Vol. 2, 24-28, pp1274-1278, Sept. 2002