1. Motorola Information Systems Group: 1993 preliminary PSTN survey. Contribution 6, TIA-TR 30.1, Ft. Lauderdale, FL, February 1993.
2. Trellis-coded modulation using multi-dimensional constellations;Wei;IEEE Trans. Inform. Theory,1987
3. British Telecom: A trellis code for V.fast. “CCITT V.fast Rapporteur Meeting”, Bath, England, September 1992.
4. U. S. Robotics: A simplified decoder. Contribution 26, TIA-TR 30.1, Huntsville, AL, May 1992.
5. Motorola Information Systems Group: Four-dimensional multilevel codes for V.fast. Contribution D193, CCITT Study Group XVII, Geneva, June 1992.