Homodyne communication system
作者： Andrew David Ritzie , Gerald Stanley Kaplan
DOI:
关键词: Acoustics 、 Signal 、 Frequency-shift keying 、 Communications system 、 Continuous wave 、 Direct-conversion receiver 、 Interrogation 、 Phase modulation 、 Radio frequency 、 Electronic engineering 、 Engineering
摘要: A homodyne communication system comprising an interrogating unit and a plurality of responsive remote units wherein continuous wave RF signal is transmitted from the to illuminate unit. The causes return (reply) be or reflected back sample (interrogation) mixed with signal. Amplitude nulls in mixer output at given relative phase relationships between interrogation reply signals, are substantially eliminated by selectively shifting signals. Also disclosed utilizing modulation impress FSK signaling on automatic vehicle location present invention.
google.co.uk参考文章(2)
A.R. Koelle, S.W. Depp, R.W. Freyman, Short-range radio-telemetry for electronic identification, using modulated RF backscatter Proceedings of the IEEE. ,vol. 63, pp. 1260- 1261 ,(1975) , 10.1109/PROC.1975.9928
J Preti, Process and system for the identification of a vehicle ,(1971)