TY  - RPRT
TI  - Multi-level trellis coded modulation and multi-stage decoding
AU  - Costello, Daniel J., Jr.
AU  - Wu, Jiantian
AU  - Lin, Shu
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19900016277
ID  - 19900016277
ER  -