NOISE-PROOF METHOD FOR TRANSMITTING AND RECEIVING WIDE-BAND SIGNAL USING SPECTRUM EXTENSION Russian patent published in 1999 - IPC

FIELD: radio engineering. SUBSTANCE: method involves generation of signal for transmission, alternation of frequency characteristics of pseudorandom signal cycle F_pr according to given data, generation of pseudorandom signal, generation of phase signal with central frequency F0 and bandwidth ±F_pr, which is superimposed with digital pseudorandom signal. During receiving method involves filtration of this signal with superimposed narrow-band noise in bandwidth F_nar≪ F_pr using filtration band F_o±F_pr, and converting it to voltage proportional to its power, filtering it in bandwidth F_nar÷F_pr, and calculation of mismatch between output signal cycle F_pr and corresponding clock frequency of receiver using correlation processing. EFFECT: increased stability to noise. 6 dwg