DEVICE FOR CODE-DIVISION TRANSMISSION AND RECEPTION OF DIGITAL INFORMATION USING BROADBAND NOISE-LIKE SIGNALS Russian patent published in 2004 - IPC

FIELD: broadband communication systems. SUBSTANCE: device designed for use in communication systems depending for their operation on spectrum expansion with aid of direct pseudorandom sequence and in particular in code-division multiple access communication systems has transmitter incorporating chip-frequency generator, pseudorandom sequence generator, carrier-frequency generator, 90 deg. phase shifter, I and quadrature channels, each incorporating coder, first and second modulators, series-to-parallel converter, and switch, as well as adding amplifier and antenna; device also has receiver incorporating antenna, amplifier, coherent detector, carrier frequency and phase recovering unit, delay search and synchronization unit, pseudorandom signal generator, and also I and quadrature channels each incorporating channel demodulators unit, maximum choice unit, series-to-parallel converter, switch solving unit, and decoder. EFFECT: enhanced spectral efficiency and data transmission speed. 1 cl, 4 dwg, 4 tbl