Patent
Digital-based phase shift keying modulator
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TLDR
In this paper, a phase code command signal is applied to an exemplary bi-phase shift keying modulating (BPSK) device designed in accordance with the present invention to phase reverse by 180° the output signal produced by the device.Abstract:
A digital-based phase shift keying modulating device is disclosed. A phase code command signal is applied to an exemplary bi-phase shift keying modulating (BPSK) device designed in accordance with the present invention to phase reverse by 180° the output signal produced by the device. The exemplary BPSK modulating device is capable of producing an output signal of either triangular or sinusoidal shape. A preferred embodiment of the exemplary device is implemented by using a single exclusive OR logic gate in conjunction with a frequency synthesizer, which is comprised of an accumulator, an output register, and a group of exclusive OR logic gates. The modulator device has a variety of applications in digital communication systems such as, for example, ground-based and spacecraft communication systems. The disclosed BPSK modulating device is particularly useful in spacecraft data link communications systems wherein weight, volume, and power consumption are at a premium.read more
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References
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Patent
Digital PSK modulator for modem
TL;DR: In this paper, an improved four-phase differential phase shift keyed modulator for use in a modem is shown. But the modulator is not suitable for the use of a single-input single-output (SIMO) channel.
Patent
Phase displacement modulator
TL;DR: A phase shift binary modulator as mentioned in this paper comprises a first input to which a succession of binary bits are applied, prior to their modulation and transmission, and another input receives a clock signal at the bit rate of the succession of bits applied to the first input terminal, which is, in turn, connected to an input of a first exclusive OR gate, the output of which is connected to another exclusive gate.
Patent
Programmable multitone DPSK modulator
TL;DR: In this article, a multi-one DPSK modulator produces a composite analog signal in which the phases of the tones included within the composite analog signals represent data, and the modulator uses digital circuitry to synthesize a plurality of analog tones simultaneously.