./devel/ldpc, Low Density Parity Check Codes

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Branch: CURRENT, Version: 20060208nb1, Package name: ldpc-20060208nb1, Maintainer: agc

This collection of programs and modules, written in C, is intended to
support research and education concerning Low Density Parity Check
(LDPC) codes. (Note, however, that the copyright notice no longer
restricts use to these purposes). These codes were invented by Robert
Gallager in the early 1960's, and re-invented and shown to have very
good performance by David MacKay and myself in the mid-1990's. The
decoding algorithm for LDPC codes is related to that used for Turbo
codes, and to probabilistic inference methods used in other fields.
Variations on LDPC and Turbo codes are currently the best practical
codes known, in terms of their ability to transmit data at rates
approaching channel capacity with very low error probability.


Master sites:

SHA1: b4bc77ed5a56976dca7d47f1065b0d59863385d9
RMD160: 37ffa0afc895ab7448d77bf5cdfb05735443c317
Filesize: 395.57 KB

Version history: (Expand)


CVS history: (Expand)


   2015-11-03 04:29:40 by Alistair G. Crooks | Files touched by this commit (1995)
Log message:
Add SHA512 digests for distfiles for devel category

Issues found with existing distfiles:
	distfiles/eclipse-sourceBuild-srcIncluded-3.0.1.zip
	distfiles/fortran-utils-1.1.tar.gz
	distfiles/ivykis-0.39.tar.gz
	distfiles/enum-1.11.tar.gz
	distfiles/pvs-3.2-libraries.tgz
	distfiles/pvs-3.2-linux.tgz
	distfiles/pvs-3.2-solaris.tgz
	distfiles/pvs-3.2-system.tgz
No changes made to these distinfo files.

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.
   2013-05-11 23:21:22 by Alistair G. Crooks | Files touched by this commit (2)
Log message:
Allow this package to be cross-built - pick up ${CC} from the environment,
if defined.
   2012-10-31 12:19:55 by Aleksej Saushev | Files touched by this commit (1460)
Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.
   2011-02-10 17:15:37 by Alistair G. Crooks | Files touched by this commit (4) | Package updated
Log message:
update ldpc package to pkgrevision 1

fix a packaging botch whereby the file of random numbers was not installed,
and a reference to the build directory was embedded in the executables.

now the regression tests run to completion:

	Running ex-dep:

	Running ex-ham7a:

	Running ex-ham7b:

	Running ex-ldpc-encode:

	Running ex-ldpc36-1000a:

	Running ex-ldpc36-5000a:

	Running ex-ldpcvar-5000a:

	Running ex-wrong-model:
	155c155
	< Bit error rate (on message bits only): 1.320e-02
	---
	> Bit error rate (on message bits only): 1.299e-02
   2010-11-29 07:43:15 by Alistair G. Crooks | Files touched by this commit (4) | Imported package
Log message:
Initial import of ldpc-20060208 into the Packages Collection.

	This collection of programs and modules, written in C, is
	intended to support research and education concerning Low
	Density Parity Check (LDPC) codes.  (Note, however, that the
	copyright notice no longer restricts use to these purposes). 
	These codes were invented by Robert Gallager in the early
	1960's, and re-invented and shown to have very good
	performance by David MacKay and myself in the mid-1990's.  The
	decoding algorithm for LDPC codes is related to that used for
	Turbo codes, and to probabilistic inference methods used in
	other fields.  Variations on LDPC and Turbo codes are
	currently the best practical codes known, in terms of their
	ability to transmit data at rates approaching channel capacity
	with very low error probability.