Citation
Abstract
Compatibility between the Mars Pathfinder spacecraft-generated (15,1/6) convolutional code and the DSN Block III maximum-likelihood convolutional decoder has been demonstrated in the laboratory at all spacecraft data rates. Laboratory tests of the (15,1/6) code (unconcatenated) have found it to be superior to that of the (7,1/2) convolutional code. At 20 bps, the performance gain of the (15,1/6) code over that of the (7,1/2) code is 1.5 dB, and at 1185 to 11,060 bps the performance gain is over 2 dB at a threshold of 5 x 10^-3 bit-error rate. In addition, the Mars Pathfinder project has successfully completed a test campaign to measure the in-flight performance of the (15,1/6) convolutional code concatenated with the Reed-Solomon code. It has been found to match the laboratory tests performed prior to launch.
Details
- Volume
- 42-129
- Published
- May 15, 1997
- Pages
- 1–11
- File Size
- 440.6 KB