Radio Direction Finding on High Frequency Short Duration Signals

reportActive / Technical Report | Accession Number: ADA092136 | Open PDF

Abstract:

The feasibility of accomplishing high frequency direction finding against short duration 100-1000 ms HF skywave signals using narrow aperture antennas is investigated. Two statistical procedures for estimating the signal bearing are proposed and compared. These procedures employ time averaging to reduce the large instantaneous bearing error caused by the phase and amplitude distortion of the wavefront due to scattering and multipath interference. Results are presented using data collected with the Southwest Research Institute Coaxial Spaced Loop HFDF system. It is shown that for a limited sample of data from this system the standard deviation of the bearing estimate for a 200 ms signal varied from 15 to 59 degrees.

Author(s):
Sheppard, Dennis D.
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Descriptive Note:
Master's thesis
Pagination:
0175

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
NPS
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_6.1.1_Wired Transmission; JCA_5.3_Planning; JCA_6_Net Centric; JCA_6.1.3_Switching and Routing; JCA_6.1_Information Transport; JCA_1_Force Support; JCA_5.4_Decide; JCA_4.4.1_Food Service; JCA_4.4_Logistics Services; JCA_1.2.5_Lessons Learned; JCA_1.3_Human Capital Management; JCA_8.2_Shape; JCA_8_Building Partnerships; JCA_1.3.2_Personnel Management; JCA_1.2_Force Preparation
Modernization Areas:
Space; Fully Networked C3
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*DIRECTION FINDING, *RADIO DIRECTION FINDERS, AMPLITUDE, BEARINGS, DISTORTION, HIGH FREQUENCY, INTERFERENCE, MEAN, MULTIPATH TRANSMISSION, RADIO NAVIGATION, SIGNALS, SKY WAVES, STANDARD DEVIATION, STATISTICAL PROCESSES, THESES, TIME
Field(s)/Group(s):
Direction Finding
Keyword(s):
APERTURES(NARROW), TRANSMISSION(BURST)
Report Date:
1980 Jun 01