Accession Number:

ADA230587

Title:

Interference Cancellation in RF Signals Using Adaptive Array Techniques

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1990-12-01

Pagination or Media Count:

65.0

Abstract:

This study investigated the effectiveness of the Least Means Squared LMS algorithm against various types of common jammers. The LMS algorithm was implemented using the Block Oriented Systems Simulator BOSS. The LMS algorithm was inserted at the output of a two element antenna array. The array was configured so as to have one-half wavelength spacing. A quadrature hybrid signal structure was used. The array was then tested against a barrage and sweep jammer. The barrage jammer testing consisted of varying each of the three available jammer parameters power, frequency and angle of arrival individually. The sweep jammer testing consisted of varying each of the three available jammer parameters power, sweep frequency and angle of arrival individually. The results of the simulation showed the LMS algorithm in combination with the quadrature hybrid was very effective against both the barrage and sweep jammers. It provided a 55 dB null in the barrage jammer cases and a 50 dB null in the sweep jammer case.

Subject Categories:

  • Radio Countermeasures

Distribution Statement:

APPROVED FOR PUBLIC RELEASE