ADAPTIVE MODULATION AND CODING IN SC-FDMA-SYSTEM Russian patent published in 2013 - IPC H04L1/00 

FIELD: information technologies.

SUBSTANCE: method and system for data transfer by means of a transmitting device along a channel having a pre-determined estimate of channel quality, includes stages of splitting (S2P) the input data flow (S40, S60, S80), which shall be transmitted, into multiple subflows (S40a, S40b, S40c) of data; processing (SYM1, SYM2, SYMj) of each of this multitude of subflows (S40a, S40b, S40c) of data into multiple subsets (S41, S42, S43) of symbols by selection of a certain circuit of code modulation (BPSK, QPSK, 16-QAM); processing separately each of this multitude of subsets (S41, S42, S43) of symbols, via multiple separate discrete Fourier transforms (DFT1, DFT2, DFT3), further indicated as DFT, to get multiple data subflows previously coded according to DFT (S44, S45, S46); identification of each data subflow pre-coded according to DFT (S44, S45, S46) in a unit (RB1, RB2, RB3) of frequency resources, via a module (SCM) of display to subcarriers, so that for each data subflow (S40a, S40b, S40c) the selected circuit of code modulation (BPSK, QPSK, 16-QAM) is chosen depending on values of channel quality assessment at frequencies of the internal identified unit (RBI, RB2, RB3) of frequency resources.

EFFECT: invention provides for frequency-selective selection of AMC due to adaptive identification of frequency resources depending on measured channel quality.

15 cl, 12 dwg