The Orthomatch Data Transmission System
نویسنده
چکیده
Orthomatch is a high-performance data transmission or telemetry system which uses envelope-orthogonal signals in the transmitter and matchedfilter detectors in the receiver. Because of the parallel coding and optimum detection techniques of Orthomatch, its calculated performance equals or betters the calculated performance of other available telemetry systems. It is within 10.2 db of Shannon's ideal system. A practical Orthomatch system, operating with 16 levels of amplitude resolution and a 40-kcps word rate (160-kcpsbit rate), has been assembled in field-prototype form and tested with transmitter and receiver components at 2.22 Gcps. Signal-in-noise performance of this practical system was found to be within 1. 5 db of calculated performance. High performance at low signal levels and other advantages of Orthomatch make it attractive for use at high data rates in space-to-ground or other transmission links where transmitter power is at a premium. Accepted for the Air Force Franklin C. Hudson, Deputy Chief Air Force Lincoln Laboratory Office
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تاریخ انتشار 2012