Title :
A Six-System Urban Mobile Telephone Installation with 60-Kilocycle Spacing
Author :
Shaw, R.C. ; Dimock, P.V. ; Strack, W., Jr. ; Hunter, W.C.
Author_Institution :
Bell Telephone Laboratories, Inc., New York, N.Y.
Abstract :
This paper describes a 6-system mobile radiotelephone installation in Chicago, operating in the 152-162-megacycle band, and using 60-kc spacing of carrier frequencies, rather than the 120-kc spacing of previous practice. The measures required to achieve this frequency saving are described, including filters and special antenna arrangements at the land transmitter, "off-channel squelch" in the land receivers, connection of six land receivers to a common antenna, and other special co-ordinating means.
Keywords :
Antenna measurements; Frequency measurement; Laboratories; Radio transmitters; Receivers; Receiving antennas; Senior members; Telephony; Transmitting antennas; Vehicles;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1950.234422
