Digital Doppler Processing Using Walsh and Quantized Fourier Transforms
Abstract
The use of Walsh and Fourier transforms to synthesize banks of contiguous doppler filters is examined in considerable detail for 32-point transforms and in less detail for 256-point transforms. It is found that the use of Walsh or hard-limited Fourier transforms results in the introduction of numerous large spurious sidelobes or artifacts in the filter responses, and that these artifacts are essentially unaffected by input signal amplitude tapering. It is shown how the artifacts may be reduced in size and number by increasing the number of quantization levels in the Fourier transform.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1974
- Accession Number
- ADA006116
Entities
People
- J. L. Ekstrom
Organizations
- Johns Hopkins University