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Costas loop

A Costas loop is a phase-locked loop (PLL) based circuit which is used for carrier frequency recovery from suppressed-carrier modulation signals (e.g. double-sideband suppressed carrier signals) and phase modulation signals (e.g. BPSK, QPSK). It was invented by John P. Costas at General Electric in the 1950s. Its invention was described as having had "a…

Mathematical models, Classical implementation & Overview

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Overview

Classical implementation

Mathematical models

QPSK Costas loop

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Map overview Semantic statistics

Costas loop

Nodes33
Edges32
Triples18
Avg. degree1.94
Density0.060606
Components1

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Costas loop

Top relations

related to In the phase-frequency domain · 7
Costas loop → Costas, In, It, The, This, Thus, VCO
related to Classical implementation · 4
Costas loop → Costas, In, The, VCO
related to Frequency acquisition · 3
Costas loop → Costas, The, VCO
related to QPSK Costas loop · 3
Costas loop → Costas, QPSK, The
is a · 1
Costas loop → phase-locked loop

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Important terminology

costas loop displaystyle vco filter phase frequency carrier signals qpsk input modulation detector theta classical time domain oscillator outputs low-pass

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Costas loopis aphase-locked loop0.90text
Costas looprelated to Classical implementationIn0.60section
Costas looprelated to Classical implementationCostas0.60section
Costas looprelated to Classical implementationVCO0.60section
Costas looprelated to Classical implementationThe0.60section
Costas looprelated to Frequency acquisitionThe0.60section
Costas looprelated to Frequency acquisitionCostas0.60section
Costas looprelated to Frequency acquisitionVCO0.60section
Costas looprelated to In the phase-frequency domainIn0.60section
Costas looprelated to In the phase-frequency domainThe0.60section
Costas looprelated to In the phase-frequency domainThus0.60section
Costas looprelated to In the phase-frequency domainVCO0.60section

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