초록 ▼

A system having a transmitter and a receiver for transmitting binary data signals of a given symbol rate, an angle-modulated carrier signal of a substantially constant amplitude and a continuous phase being generated in the modulation stage of the transmitter, and the transmitted modulated signal be

A system having a transmitter and a receiver for transmitting binary data signals of a given symbol rate, an angle-modulated carrier signal of a substantially constant amplitude and a continuous phase being generated in the modulation stage of the transmitter, and the transmitted modulated signal being orthogonally, coherently demodulated in the receiver. The modulation stage of the transmitter is arranged so that the phase of the modulated signal changes in each symbol interval by an amount from the sequence -pppp

대표청구항 ▼

A system for transmitting binary data signals with a given symbol rate 1/T from a transmitter to a receiver over a transmission channel of limited bandwidth, this transmitter comprising a data signal source, a clock signal source coupled to said data signal source for synchronizing the data signal s

A system for transmitting binary data signals with a given symbol rate 1/T from a transmitter to a receiver over a transmission channel of limited bandwidth, this transmitter comprising a data signal source, a clock signal source coupled to said data signal source for synchronizing the data signal source, a modulation stage comprising a carrier oscillator connected to the data signal source for generating an angle-modulated carrier signal of a substantially constant amplitude and a continuous phase, and an output circuit for supplying the angle-modulated carrier signal to the transmission channel, the receiver comprising an input circuit for obtaining the transmitted angle-modulated carrier signal from the transmission channel, a reference carrier circuit coupled to the input circuit for recovering two reference carriers with a phase difference of p2 rad., a demodulation circuit, connected to the input circuit and the reference carrier circuit, for coherently demodulating the transmitted angle-modulated carrier signal by these reference carriers and for generating first and second demodulated signals, a reference clock signal circuit coupled to the input circuit for recovering two reference clock signals of half the symbol rate 1/(2T) with a phase difference of pfppppf