RADIO COMMUNICATION METHOD Russian patent published in 2008 - IPC H04B7/165 

FIELD: physics, radio.

SUBSTANCE: transmitters transmit packages of signals on the time-and-frequency positions chosen in a blanket frequency band of a radio channel by independent generators under the pseudorandom law. In the package beginning transmit a preamble modulated on two (FM-2) or four (FM-4) of position of a phase. At FM-4 to cophased builder (0°, 180°) add quarter-phase builder (90°, 270°). On reception transfer a radio channel strip to field of low frequencies and will converse inverse prompt Fourier transformation (PFT) all signals from the frequency field to the temporary. On each interval of a figure of the signal, shifted consistently with a step, smaller a figure interval, spot for all PFT points of sequence of amplitudes and phases of the signals, the first and second differences of the next phases in sequences and the drive phase detrusions. On a preamble the correlation receiver spot clock sync cophased and the quarter-phase signal builder, to a filtration restrict the noise strips and demodulate cophased, and at FM-4-also quarter-phase signal builder.

EFFECT: reduction of frequency band and pinch of noise stability of reception.

2 cl, 3 dwg, 1 tbl, 1 ex