Accession Number:

ADA229732

Title:

New Methods for the Detection and Interception of Frequency-Hopped Waveforms

Descriptive Note:

Technical memo.

Corporate Author:

JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1990-11-01

Pagination or Media Count:

122.0

Abstract:

Three new methods for the detection and interception of frequency - hopped waveforms are presented. First presented are two types of sequential detectors a purely sequential test that requires less data for a decision and a truncated sequential test that requires less data even while opeating under poor signal-to-noise ratios. Performances are evaluated via theoretical, numerical, and Monte Carlo analyses. Second, compressive-receiver-based-based interceptors are presented 1 a locally optimal detector, which is compared against the optimal channelized detectors 2 a simplified, suboptimal scheme, which trades off duty cycle against performance 3 and a technique for estimating hop frequency. Quantified are the performances of the optimal and suboptimal detectors. Third, a detector based on the Amplitude Distribution Function ADF is presented. Given is a technique for deconvolving the ADF, enabling signal and noise separation. From this, a detection statistic is defined and statistically characterized, yielding a new class of detectors. The detectors are performance analyzed. Keywords Spread spectrum, Frequency-hopped, Electronic counter measures, Interception, Probability, Detection, Statistics.

Subject Categories:

  • Radio Countermeasures

Distribution Statement:

APPROVED FOR PUBLIC RELEASE