FIELD: information technology.
SUBSTANCE: such a system uses interleaved FDMA (IFDMA) or limited FDMA, several transmitters can transmit their control signals using time-division multiplexing (TDM), code-division multiplexing (CDM), interleaved frequency-division multiplexing (IFDM) or limited frequency-division multiplexing (LFDM). Control signals from these transmitters are orthogonal to each other in this case. A receiver carries out complementary demultiplexing of the control signals sent by the transmitters. The receiver can receive channel evaluation for each transmitter using a minimum mean square error (MMSE) or a least square (LS) method. The receiver can receive overlapping transmitted data sent at the same frequency-time unit by several transmitters and can carry out spatial processing for the receiver with spatial filter matrices in order to separate these transmitted data. The receiver can receive a spatial filter matrix based on channel evaluation for transmitters and using vanishing methods, MMSE or combination of maximum ratios.
EFFECT: support for simultaneous transmission for a large number of terminals in a frequency-division multiple access system with a single carrier.
74 cl, 21 dwg
