TRANSCEIVER OF WIDE BAND SIGNALS WITH INCREASED INFORMATION SECURITY Russian patent published in 1995 - IPC

FIELD: radio engineering. SUBSTANCE: transceiver has on transmission side: generator 1 of carrier and clock frequencies, former 2 of pseudorandom sequence, demultiplexer 3, first, second and third generators 4, 14 and 10 of pseudorandom sequence, first and second multipliers 5, 8 (90 deg phase inverter 6, phase manipulator 7, summator 9, first and second modulo two adders 19, 11, frequency doubler 12, counter 13, adder 15, information source 16, first and second time selectors 17, 18, shift register 20; on reception side: generator 21 of reference pseudorandom sequence, first and second multipliers 22, 29, phase detector 23, band-pass filter 24, first and second time selectors 25, 26, shift register 27, delay element 28, pseudorandom sequence analyzer 30, first and second sign multipliers 31, 40, first and second generators 32, 38 of pseudorandom sequence, adder 33, first and second keys 34, 37, synchronization signal detector 35, frequency doubler 36, demultiplexer 39, threshold unit 41, matched filter 42. Classification of information is performed by modulo two summing of each second half of length of information symbols with symbols of additional pseudorandom sequence. EFFECT: increased information security. 1 dwg