A HIGH-RESOLUTION SPECTRAL ANALYSIS TECHNIQUE

Authors
  1. Mohammed, A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A modified version of the complex demodulation approach is used in the development of an efficient high-resolution technique for spectral analysis. Through a combined filtering and decimation operation and a suboptimal Finite Impulse Response (FIR) digital filter, the Fast Fourier Transform (FFT) sizes in the fast convolutions are reduced significantly. Though this procedure introduces wraparound effects, such errors are small compared to aliasing arising from the normal digital filtering and decimation operations. Aside from its capability to analyze multiple finite bandwidths with different frequency resolutions, the accuracy obtainable by this method allows for a large analysis dynamic range.
Report Number
DREA-TM-83-D — Technical Memorandum
Date of publication
15 May 1983
Number of Pages
29
DSTKIM No
83-02297
CANDIS No
40097
Format(s):
Hardcopy;Originator's fiche received by DSIS

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