
Accession Number : AD0652622
Title : CROSSSPECTRUM VERSUS SPECTRUM FOR NOISE DIRECTIONALITY MEASUREMENT.
Descriptive Note : Technical rept.,
Corporate Author : BELL TELEPHONE LABS INC WHIPPANY N J
Personal Author(s) : Hirsch,Peter
Report Date : 06 JUL 1966
Pagination or Media Count : 12
Abstract : The report presents a derivation showing that, given two crossed linear arrays, the crossspectrum of the array outputs is a better estimator of the noise field directionality than is the spectrum of the sum of the array outputs. When the two arrays each have a 10degree beamwidth and sidelobe level of 0.05, the crossspectrum is a tolerable estimate of the noise power from some particular direction, if the power from that direction exceeds the general background level by about 7 dB. (Author)
Descriptors : (*RADIOFREQUENCY INTERFERENCE, *MEASUREMENT), DIRECTION FINDING, LINEAR SYSTEMS, MATHEMATICAL ANALYSIS, ANTENNA ARRAYS, RADIOFREQUENCY POWER, NOISE, FREQUENCY, VOLTAGE, EQUATIONS, POLYNOMIALS
Subject Categories : Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE