THE FORMATION OF RELAXED SOLUTIONS IN THE SYSTEM OF THE BROADBAND CHANNEL WITH QPSK–QAM
A relevant problem of a soft-decision indexes (SDI) forming for non-binary codes consisted in the signal sets under its processing at the non-stationary channel output is settled. On the one hand, the increasing of positions in such sets leads to the system data rate rise, but on the other hand, it reduces the Euclidean distance between the points of signal constellation. Such contradiction is resolved by choosing a reasonable modulation rate in combination with the means of transmitter error-correction coding and soft code pattern decoding by the receiver with SDI.