Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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H04L27/18
Phase-modulated carrier systems, i.e. using phase-shift keying
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H04L27/22
Demodulator circuits; Receiver circuits
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H04L27/227
using coherent demodulation
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H04L27/2271
wherein the carrier recovery circuit uses only the demodulated signals
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H04L27/2272
using phase locked loops
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