Browse > Article

Design of a Timing Estimator Algorithm for 2.45GHz LR-WPAM Receiver  

Kang Shin-Woo (성균관대학교 정보통신공학부)
Do Joo-Hyun (성균관대학교 정보통신공학부)
Park Tha-Joon (삼성전기 중앙연구소)
Choi Hyung-Jin (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.3A, 2006 , pp. 282-290 More about this Journal
Abstract
In this paper, we propose an enhanced Timing Estimator algorithm for 2.45GHz LR-WPAN receiver. Because an expensive and highly efficient oscillator can't be used for low-cost implementation, a Timing Estimator algorithm having stable operation in the channel environment with center frequency tolerance of 80 ppm is required. To enhance the robustness to frequency offset and the stability of receiver performance, multiple delay differential filter is adopted. By utilizing the characteristic that the correlation result between the output signal of Multiple delay differential filter and reference signal is restricted on the In-phase part of the correlator output, a coherent detection scheme instead of the typical noncoherent one is adopted for Timing Estimator. The application of the coherent detection scheme is suitable for LR-WPAN receiver aimed at low-cost, low-power, and low-complexity, since it can remove performance degradation due to squaring loss of I/Q squaring operation and decrease implementation complexity. Computer simulation results show that the proposed algorithm achieved performance improvement compared with the differential detection-based noncoherent scheme by 2dB in average.
Keywords
LR-WPAN; ZigBee; Timing Estimator; Differential filter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 IEEE 802.15.4-2003 IEEE Standard for Information Technology-Part 15.4 : Wireless Medium Access Control(MAC) and Physical layer(PHY) Specifications for Low Rate Wireless Personal Area Networks(LR-WPANs), 2003
2 Kamilo Feher, Digital Communications, Prentice-Hall. 1983
3 신요안, 양석철, 오종옥, 'IEEE 802.15 WPAN 기술 표준화 동향,' Telecommun. Review(무선통신.방송의 표준 기술 특집호), 제87호, pp.131-148, 2003년 11월
4 Chris Evans-pughe, 'Is the ZigBee wireless standard, promoted by an alliance of 25 firms, a big threat to Bluetooth?,' IEEE review, Mar. 2003
5 http://www.ieee802.org/15/pub/TG4.html
6 A.J. Viterbi, 'CDMA Principles of Spread Spectrum Communication,' Addison Wesley, 1995. 6
7 E. Callaway, P. Gorday, L. Hester, J.A. Gutierrez, M. Naeve, B. Heile and V.Bahl, 'Home Networking with IEEE 802.15.4: A Developing Standard for Low-Power Low-Cost Wireless Personal Area Networks,' IEEE Communications, Vol. 40, no. 8, Aug. 2002, pp.70-77
8 A.W. Lam and S. Tantaratana, Theory and Applications of Spread-Spectrum Systems, The Institute of Electrical and Electronics Engineers Inc. 1994
9 오수현, 곽진, '유비쿼터스 환경에 적합한 사용자 프라이버시 보호 기능을 제공하는 RFID 시스템,' 한국통신학회 논문지, 제29권 12C호, pp.1729-1738, 2004년 12월