Using a Microprocessor in a Walsh-Fourier Spectral Analyzer
- 1 April 1976
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Computer
- Vol. 9 (4) , 27-32
- https://doi.org/10.1109/c-m.1976.218557
Abstract
The spectrum of a frequency-limited periodic wave may be obtained rapidly by measuring its truncated Walsh spectrum, and then converting from Walsh spectrum to Fourier spectrum after the measurement. The conversion process consists of a matrix multiplication in which a measured Walsh spectrum vector, of dimension 2k, is multiplied by a 2kX 2kconversion matrix that is compensated for Walsh-spectrum truncation, to yield the corresponding Fourier spectrum vector. The microprocessor is well suited to this end; it is also useful in monitoring instrument panel switches and driving a display and print-out. This paper compares available microprocessors from the viewpoint of BCD processing—and concludes that the Fairchild PPS25 processor is the one best suited to meet the requirements.Keywords
This publication has 4 references indexed in Scilit:
- Walsh-to-Fourier Spectral Conversion for Periodic WavesIEEE Transactions on Electromagnetic Compatibility, 1975
- Microprocessor scorecardEuromicro Newsletter, 1975
- Sinusoids versus Walsh functionsProceedings of the IEEE, 1974
- Conversion of sequency-limited signals into frequency-limited signals and vice versa (Corresp.)IEEE Transactions on Information Theory, 1971