Citation
Abstract
The Block III maximum-likelihood convolutional decoder (B3MCD) is a programmable convolutional decoder capable of decoding convolutional codes with constraint lengths K from 3 to 15, code rates 1=n from 1=2 to 1=6, and bit rates as high as 2.2 million bits per second. The B3MCD will acquire node synchronization by examining correlations of reencoded symbols with input soft symbols. Based on simulations, this strategy should achieve node acquisition within 1000 bits with high probability, while robustly detecting error conditions such as all zero bits being transmitted. The acquisition strategy has been verified by simulating the decoder operating on soft symbols recorded from the Block V Receiver in the laboratory. The soft-symbol correlations also will be used to quickly detect loss of synchronization.
Details
- Volume
- 42-128
- Published
- February 15, 1997
- Pages
- 1–12
- File Size
- 339.6 KB