Transceiver for phase-shift modulated carrier signals
First Claim
1. A transceiver for use in a system communicating digital data over a preselected transmission medium by phase-shift-modulation of a carrier waveform having a frequency related to the frequency of a system-wide waveform, comprising:
- a transmitter section having an input receiving a clock frequency waveform, another input receiving a transmit clock waveform and an output, and including means for synthesizing a pseudo-bandpass-filtered waveform having said carrier frequency, responsive to receipt of said clock frequency waveform;
means receiving at least one bit of digital data to be transmitted for storing said data and for sequentially providing each successive data bit at an output thereof responsive to an associated one of successive portions of said transmit clock waveform;
means receiving the at least one data bit from said storing means output for modulating the phase shift of the carrier frequency waveform responsive to the digital value of the data bit to be then transmitted; and
means for amplifying the amplitude of the phase-shift-modulated, pseudo-bandpass-filtered carrier frequency waveform and coupling the amplified carrier waveform to said transmitter section output;
a receiver section having an received carrier input, a reference signal input and a recovered data output, said receiver section including means connected to said received carrier and reference signal inputs for providing a baseband data signal having each of a plurality of amplitude transitions thereof responsive to an associated reversal of the phase of the waveform of said received carrier;
means receiving said baseband data signal for generating a baud synchronization signal having periodic amplitude transitions synchronized to the transitions of said baseband data signal; and
means receiving said baud synchronization and baseband data signals for recovering the digital data modulated onto said received carrier waveform, and providing said recovered digital data at said receiver section recovered data output;
means for generating said transmit clock waveform with a preselected frequency and phase relationship to the waveform of said baud synchronization signal; and
a frequency synthesizer section having an input receiving said system-wide waveform and including means for generating said clock frequency waveform for said transmitter section; and
means for generating said reference signal for said receiver section.
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Accused Products
Abstract
A transceiver for a phase-shift-modulated carrier data communications system, includes a digital-data-recovering receiver having relatively wide band-pass filters and a complimentary integrate-and-dump data detector. A pseudo-bandpass-filtered, modulated-carrier synthesizer provides a transmission signal, under control of a frequency-arithmetic multiple-frequency synthesizer, which is also utilized to provide all required frequencies to the receiver mixers and band synchronization circuitry. All transceiver frequencies are locked to the instantaneous frequency of a system-wide signal.
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Citations
30 Claims
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1. A transceiver for use in a system communicating digital data over a preselected transmission medium by phase-shift-modulation of a carrier waveform having a frequency related to the frequency of a system-wide waveform, comprising:
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a transmitter section having an input receiving a clock frequency waveform, another input receiving a transmit clock waveform and an output, and including means for synthesizing a pseudo-bandpass-filtered waveform having said carrier frequency, responsive to receipt of said clock frequency waveform; means receiving at least one bit of digital data to be transmitted for storing said data and for sequentially providing each successive data bit at an output thereof responsive to an associated one of successive portions of said transmit clock waveform; means receiving the at least one data bit from said storing means output for modulating the phase shift of the carrier frequency waveform responsive to the digital value of the data bit to be then transmitted; and means for amplifying the amplitude of the phase-shift-modulated, pseudo-bandpass-filtered carrier frequency waveform and coupling the amplified carrier waveform to said transmitter section output; a receiver section having an received carrier input, a reference signal input and a recovered data output, said receiver section including means connected to said received carrier and reference signal inputs for providing a baseband data signal having each of a plurality of amplitude transitions thereof responsive to an associated reversal of the phase of the waveform of said received carrier; means receiving said baseband data signal for generating a baud synchronization signal having periodic amplitude transitions synchronized to the transitions of said baseband data signal; and means receiving said baud synchronization and baseband data signals for recovering the digital data modulated onto said received carrier waveform, and providing said recovered digital data at said receiver section recovered data output; means for generating said transmit clock waveform with a preselected frequency and phase relationship to the waveform of said baud synchronization signal; and a frequency synthesizer section having an input receiving said system-wide waveform and including means for generating said clock frequency waveform for said transmitter section; and means for generating said reference signal for said receiver section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification