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.
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Published in Russian in Informatsionnye Protsessy, 2014, Vol. 14, No. 2, pp. 151–159.
The article was translated by the authors.
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Frolov, A.A., Zyablov, V.V. A coding technique for Q-frequency S-user gaussian channel. J. Commun. Technol. Electron. 59, 1483–1488 (2014). https://doi.org/10.1134/S1064226914120055
- multiple access
- nonbinary LDPC code
- embedded modulation