| 摘要 |
FIELD: reception of digital signals transmitted by method of Differential phase-shift keying, method is used in development and production of apparatuses of digital information transmission. SUBSTANCE: apparatus is used to realize the method. Demodulator of DPSK signals has in series connected filter, limiter and also two in parallel connected correlators, two units of sampling, solving unit, generator of reference oscillation, phase changer, two units of sign detection and clock pulses generator. It is added with phase estimation forming unit made of two inverters, two units of sign detection, switch, two units of module calculation, comparison unit, generator of constants, adder. Method and apparatus realizations allow to increase interference resistance of DPSK signals demodulation due to getting linear dependance of estimation of transmitted signal phase (Фп) on demodulated signal phase (Ф) in conditions of demodulated signal level variation in wide range and to simplify demodulator design. EFFECT: increased DPSK signals demodulation interference resistance and simplified design of demodulator. 3 cl, 4 dwg |
