On the Equivalence between Tapped Delay-Line and FFT Processing in Adaptive Arrays.
Abstract
This report discusses the relationship between FFT processing and tapped delay-line processing in adaptive arrays. It is shown that the output SINR obtained from an adaptive array with tapped delay-line processing. The equivalent tapped delay-line array has the same number of taps in each delay-line as the number of samples used in the FFTs, and has a delay between taps equal to the delay between samples in the FFTs. The main conclusion of this work is that FFT procesisng in and of itself does not offer any improvement in array bandwidth performance. The bandwidth perforamnce of an adaptive array can be improved by using several time delayed samples of the signal from each element in the adaptive processor, rather than just a single sample. However, no further improvement results from taking FFTs of these sampled signals. The same bandwidth performance is obtained by simply weighting and combining the time domain samples directly. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA173910
Entities
People
- R. T. Compton Jr.
Organizations
- Ohio State University