Accession Number : AD0761522

Title :   Modulation Waveform Study.

Descriptive Note : Final rept. 19 Nov 71-29 Aug 72,

Corporate Author : TEXAS INSTRUMENTS INC DALLAS

Personal Author(s) : Ridings,Richard V. ; Reeves,Charles R. ; Aasterud,Jon P.

Report Date : MAR 1973

Pagination or Media Count : 334

Abstract : TRANSMISSION SYSTEMS, MODULATION), (*RADIO RELAY SYSTEMS, *MODULATION), ELECTRONIC COUNTER COUNTERMEASURES, DIGITAL SYSTEMS, MULTIPLE OPERATION, DETECTORS, MULTIPLEXING, FREQUENCY MODULATIONTIME DIVISION MULTIPLEXINGThe Modulation Waveform Study is addressed to the determination of the optimum spread-spectrum modulation technique for use in a ground sensor-to-airborne relay communications link. The study is conducted under a set of guidelines concerning digital message error rates, message structure, communication link distance, frequency, multiple access capability (i.e., self-interference) and processing gain against intentional jamming. Pseudonoise, time hop, frequency hop, and hybrid modulation techniques are examined and only two are found to be suitable for satisfying the study guideline: frequency hop and time hop/pseudonoise. (Author)

Descriptors :   (*DATA TRANSMISSION SYSTEMS, MODULATION), (*RADIO RELAY SYSTEMS, *MODULATION), ELECTRONIC COUNTER COUNTERMEASURES, DIGITAL SYSTEMS, MULTIPLE OPERATION, DETECTORS, MULTIPLEXING, FREQUENCY MODULATION

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE