| Description: | This package implements an encoder and a Viterbi decoder for the NASA standard rate 1/2 constraint length 7 convolutional code. Also included are support routines to generate metric tables that are optimized for gaussian noise with a specified Eb/N0 ratio, and a test driver that exercises the encoder/decoder routines and keeps statistics. The following files are included: Makefile for BSDI 1.1 README this file genbut.c utility program for generating inline macro calls metrics.c generate soft-decision metrics for AWGN channel sim.c transmitter/channel simulator (including gaussian noise gen) tab.c lookup table for parity generation viterbi.c the encoder and Viterbi decoder routines vittest.c driver program for testing The test program in vittest.c creates a test frame, encodes it, adds gaussian noise and decodes it. It then repeats a specified number of times, keeping count of bit errors and errored frames (frames with at least one error). |
| Filter list: | ftp|*|*|viterbi* |
| Section maint.: | Erwin Lemmers (pe1nmb) <elem@kabelfoon.nl> |
| Timestamp: | 2003-09-15 22:03 UTC |
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