METHOD AND DEVICE FOR RELATIVE PHASE MODULATED SIGNAL DEMODULATION Russian patent published in 1997 - IPC

FIELD: digital data transmission equipment. SUBSTANCE: relative phase modulated signal demodulator has series-connected filter, limiter, as well as two parallel-connected correlators, two gating units, resolving unit, reference-wave oscillator, phase shifter, two character separating units, and clock generator; in addition, it is provided with phase estimate shaping unit that has two inverters, two character separating units, switch, two modulo computing units, comparison unit, constant generator, and adder. Proposed method is implemented by this device. EFFECT: improved noise immunity in signal demodulation due to linear dependence between phase φ_n estimate and demodulated signal phase φ in case of variation of demodulated signal within wide range; simplified design of demodulator. 2 cl, 4 dwg , 1 tbl