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- 31 October 1989
-
- The files RMEZGOTO.C and RMEZLOOP.C are translations into the C
- language of the classic Parks McClellan Remez FIR filter design
- program.
-
- The translations are based on the FORTRAN program as listed in
- the 1975 Prentice Hall book "Theory and Application of Digital
- Signal Processing" by Rabiner & Gold. The file RMEZGOTO.C is a
- direct, almost line for line translation including 47 goto
- statements; RMEZLOOP.C substitutes "while()" loops where
- appropriate, reducing the number of gotos to 5.
-
- The program has been modified to output the file IMPULSE.RMZ in
- lieu of punched cards.
-
- Compiles with Borland Turbo C vers 2.0 command "tcc rmezloop.c"
- or with Microsoft Quick C vers 2.00 commands "qcl rmezloop.c /c"
- and "link rmezloop.obj /STACK:0x2000".
-
- The file PAD.C reads a commandline-specified file and writes the
- file PADDED.DAT containing the commandline number of data
- points. Adds "0.0"s if needed to create sufficient points.
- Useful for zero padding short impulse response sequences so that
- a long FFT can be used to obtain good frequency resolution.
- Usage: pad filename #points.
- Example: pad impulse.rmz 512.
-
- The file COEFF.C estimates the required number of filter
- coefficients and is based on the formula on p. 156 of the book by
- Rabiner & Gold. It has been written to specify passband ripple
- in dB instead of in percent deviation.
-
- These translations are released to the public domain.
-
- Bob Briggs
- 1337 Rossway Ct.
- Los Altos, CA 94024