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- Chirp Z-Transform
-
- by
- Phuong Tran & Mike Griffin
-
- Children's Hospital Research Foundation
- Division of Cardiology
- Biomedical Engineering Laboratory
- Elland & Bethesda Aves
- Cincinnati,Ohio 45229
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- The Chirp Z-Transform is a computationally efficient
- algorithm to compute the z Transform along a spiral contour in
- the z domain. If the contour is the unit circle, then this would
- be equivalent to computing the Fast Fourier Transform but a
- little slower.
-
-
-
- System requirements:
-
- IBM-PC w/128k
- 8087 coprocessor
- Hercules Mono Graphics Board
-
- Program Requirements:
-
- This program requires the following files to reside on
- the same disk as the program:
-
- 4x6.fon
- error.msg
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- Program Description:
-
- The program allows inputs from either the keyboard or a
- sequential data file (data is assumed to have both real and
- imaginary parts). If a file is specified, it must have a '.DAT'
- extension.
-
- The output can be routed to a file,printer or screen. If
- the printer or screen is specified, the data points will
- be printed from left to right. If a file is specified, it will be
- stored on a disk file with a '.DAT' extension.
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- Regardless of output routing, the magnitude and phase
- will be plotted on the screen.
-
- The phase output is plotted from pi/2 to -pi/2.
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- The input parameters are as follows:
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- 1. Number of complex paired input points
- 2. Number of complex paired output points
- 3. Sample rate of the data in Hertz
- 4. Initial Sigma value of CZT contour in Hertz
- 5. Initial Omega value of CZT contour in Hertz
- 6. Increment in Sigma along the CZT contour in Hertz
- 7. Increment in Omega along the CZT contour in Hertz
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- Files:
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- The following files are included in this library:
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- CHIRPZ.COM - program
- 4X6.FON - required for graphics
- ERROR.MSG - required for graphics
- CHIRPZ.DOC - this file
- PROCWRIT.PAS - procedure to write data into a file
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- A version for the color monitor is also available.
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- Source code is available on request.
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- References:
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- 1. Programs for Digital Signal Processing
- IEEE Press, 1979
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- 2. Theory & Application of Digital Signal Processing
- L.R.Rabiner,B.Gold,Prentice Hall,1975
-
- Please send any problems,suggestions, or ideas to the
- address listed or leave a message on our RBBS. If your having any
- problems and would like to contact us, feel free to call from 9am
- to 6pm on weekdays.
-
- Biomedical Engineering RBBS
- ---------------------------
- data/voice: 513-559-8599
- RBBS hours: 1800-0900 weekdays
- : 24 hours weekends
- : EST
-
- 4/26/85
-