A coding technique for Q-frequency S-user gaussian channel
Alexey Frolov, Victor Zyablov · Journal of Communications Technology and Electronics · 2014
The paper addresses the problem of constructing an asynchronous multiple access system for a multiuser Q -frequency channel with additive white gaussian noise (AWGN). To solve the problem we propose a coding scheme for the channel. The major component of the scheme is non-binary low-density parity-check (LDPC) code. To increase the transmission rate we introduce the embedded modulation. The efficiency of the resulting multiple-access system is shown by simulations.