US 11,757,682 B1
Generation of trellis-coded modulation schemes
Raanan Ivry, Caesarea (IL)
Assigned to MELLANOX TECHNOLOGIES, LTD., Yokneam (IL)
Filed by MELLANOX TECHNOLOGIES, LTD., Yokneam (IL)
Filed on Apr. 28, 2022, as Appl. No. 17/731,268.
Int. Cl. H04L 27/04 (2006.01); H04L 25/03 (2006.01); H04B 1/04 (2006.01); H04L 27/36 (2006.01); H04L 27/20 (2006.01)
CPC H04L 25/03203 (2013.01) [H04B 1/04 (2013.01); H04L 27/04 (2013.01); H04L 27/20 (2013.01); H04L 27/36 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for generating a Trellis-Coded Modulation (TCM) scheme for transmitting symbols over a Partial-Response (PR) channel, the method comprising:
holding a base TCM scheme comprising a plurality of states and transitions among the states;
producing multiple first sequences of symbols, and calculating respective second sequences of symbols, each second sequence of symbols emulating a response of the PR channel to a respective first sequence of symbols traversing the PR channel;
initializing the TCM scheme by assigning the first sequences of symbols to the transitions of the base TCM scheme;
removing one or more of the transitions from the TCM scheme in a manner that remaining second sequences from among the second sequences of symbols, the remaining second sequences corresponding to transitions that were not removed, are separated from one another by at least a specified first distance; and
further removing, from among the transitions of the TCM scheme, one or more additional transitions, in a manner that a plurality of sequences from among the remaining second sequences of symbols, the plurality corresponding to transitions from a current state to a next state, are separated from one another by at least a specified second distance larger than the first distance.