Title :
Reduction of aliasing ambiguities through phase relations
Author :
Sanderson, R.B. ; Tsui, J.B.Y. ; Freese, N.
Author_Institution :
Wright Lab., Wright Patterson AFB, OH, USA
fDate :
10/1/1992 12:00:00 AM
Abstract :
A method for digital determination of a single frequency from a sine wave sampled at less than the Nyquist rate is discussed. The method makes use of phase shift information to eliminate the aliasing ambiguity. Multiple sampled data are required to eliminate ambiguity completely. Computer modeling using simulated data corrupted by uncorrelated Gaussian noise was used to verify the approach. The results demonstrate that the frequency of an input sine wave can be correctly identified. This approach can be applied to electronic warfare (EW) receivers to increase their input bandwidth
Keywords :
digital simulation; electronic warfare; estimation theory; military computing; radar theory; random noise; signal detection; signal processing; Nyquist rate; aliasing ambiguities; computer modelling; electronic warfare; error analysis; multiple sampled data; phase relations; phase shift; radar warning receivers; receivers; simulated data; sine wave; single frequency; uncorrelated Gaussian noise; Analog-digital conversion; Bandwidth; Electronic warfare; Fourier transforms; Frequency conversion; Interpolation; Laboratories; Military computing; Signal generators; Signal resolution;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
