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Analysis of the effect of Digital frequency synthesizer in FSK-Frequency-hopped data communications  

송인근 (우송대학교 컴퓨터전자정보공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.5, 2003 , pp. 879-886 More about this Journal
Abstract
Agile frequency synthesizers are the common device used for commandable, wide-band frequency hopping in frequency-hopped (FH) communications. In this paper, synthesizer phase transient effect and its compensation methods in an FH/FSK(Frequency Hopped Frequency Shift Keying) system are studied. Models for these analysis are developed and resulting performance degradations are computed. The basic PLL is difficult to implement for fast frequency hopping in narrowband radio communication systems. To solve this problem, digital frequency synthesizer/CPM (Continuous Phase Modulation)modulator is proposed. And it's performance is analyzed theoretically. The analysis show that fast frequency hopping is possible in frequency hopping system that use digital frequency synthesizer/CPM modulator.
Keywords
FH-SS system; PLL; Frequency synthesizer; Phase transient response; time constant;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Howard M.Benlin, 'Design of phase-locked Loop circuits, with Experiments', 1978 E & L instruments, Inc (1982)
2 Robert C. Dixon, 'Spread Spectrum Communication System', March 1984
3 김성철, 송인근, '디지털 위상고정루프를 이용한 FSK복조기의 설계 및 성능 분석,' 한국해양정보통신학회. Vo1.7,No.2 pp194-200. Apr.2003
4 Gardner, Floyd M: Phaselock Techniques, 2d ed., John Wiley and Sons, New York, 1979
5 P. H. Saul and D. G. Taylor, 'A high-speed direct frequency synthesizer,' IEEE J. Solid-State Circuits, vol.25, no. 1, pp.215-219, 1990   DOI   ScienceOn
6 M. Schwartz, W. Bennet, and S. Stein, Communication System and Techniques. New York: McGraw-Hill, 1966
7 C. J. Byrne, 'Properties and design of the phase-controlled oscillator with a sawtooth comparator,' Bell Syst. tech. J., Mar. 1962