Accession Number : AD0487616

Title :   OPTIMUM FREQUENCY DETECTION TECHNIQUES.

Descriptive Note : Final rept. Oct 64-Jun 65 on Phase 1,

Corporate Author : EMI COSSOR ELECTRONICS LTD DARTMOUTH (NOVA SCOTIA)

Personal Author(s) : Outhouse, Lawrence E. ; Hancock, John R.

Report Date : JUN 1966

Pagination or Media Count : 138

Abstract : This report covers Phase I of the study and investigation of techniques for a high frequency (HF) ionospheric sounding system which is to provide real-time determination of the optimum frequency for use on tactical HF communications circuits. Topics included in the study are (1) ionospheric sounding systems, (2) frequency coverage, (3) transmission energy, (4) radio frequency interference and (5) multipath. A system configuration is recommended utilizing 150 microsec pulses to evaluate circuit conditions by comparing multipath amplitude and time separation with pre-determined values. (Author)

Descriptors :   (*RADIO TRANSMISSION, IONOSPHERIC PROPAGATION), (*IONOSPHERIC PROPAGATION, HIGH FREQUENCY), (*ATMOSPHERIC SOUNDING, HIGH FREQUENCY), OPTIMIZATION, RADIO RECEIVERS, MULTIPATH TRANSMISSION, RADIOFREQUENCY INTERFERENCE, REAL TIME, DETERMINATION, DISPLAY SYSTEMS, SELECTION.

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE