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Continuous phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques where the carrier phaseabruptly resets to zero at the start of every symbol (e.g. M-PSK), with CPM the carrier phase is modulated in a continuous manner. For instance, with QPSK the carrier instantaneously jumps from a sine to a cosine (i.e. a 90 degree phase shift) whenever one of the two message bits of the current symbol differs from the two message bits of the previous symbol. This discontinuity requires a relatively large percentage of the power to occur outside of the intended band (e.g., high fractional ), leading to poor spectral efficiency. Furthermore, CPM is typically implemented as a constant-envelope waveform,

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rdf:type	software
rdfs:label	Continuous phase modulation (en)
rdfs:comment	Continuous phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques where the carrier phaseabruptly resets to zero at the start of every symbol (e.g. M-PSK), with CPM the carrier phase is modulated in a continuous manner. For instance, with QPSK the carrier instantaneously jumps from a sine to a cosine (i.e. a 90 degree phase shift) whenever one of the two message bits of the current symbol differs from the two message bits of the previous symbol. This discontinuity requires a relatively large percentage of the power to occur outside of the intended band (e.g., high fractional ), leading to poor spectral efficiency. Furthermore, CPM is typically implemented as a constant-envelope waveform, (en)
sameAs	Continuous phase modulation Continuous phase modulation
dbp:wikiPageUsesTemplate	dbt:ISBN dbt:Modulation_techniques
Subject	Radio modulation modes Wireless networking
Link from a Wikipage to an external page	http://people.eecs.ku.edu/~esp/php/cpmdistance.php http://www.csee.wvu.edu/~mvalenti/documents/49IyerSeshadriCISS2k7.pdf
gold:hypernym	Method
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Continuous_phase_modulation?oldid=962076734&ns=0
Wikipage page ID	905348 (xsd:integer)
page length (characters) of wiki page	6558 (xsd:nonNegativeInteger)
Wikipage revision ID	962076734 (xsd:integer)
Link from a Wikipage to another Wikipage	Bandlimiting Bit Bluetooth Viterbi algorithm Wideband Carrier wave Radio modulation modes Wireless networking Causality Frequency-shift keying Frequency deviation Frequency modulation Digital data Demodulation Phase-shift keying Phase (waves) Phase modulation Constant envelope Continuous function Minimum-shift keying Spectral efficiency GSM Gaussian filter IEEE 802.11 Instantaneous phase and frequency Absolutely integrable function Intersymbol interference Mobile broadband modem Waveform Maximum likelihood estimation Sine and cosine Sine wave dbr:Duo-binary_signaling dbr:Out-of-band_power
has abstract	Continuous phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques where the carrier phaseabruptly resets to zero at the start of every symbol (e.g. M-PSK), with CPM the carrier phase is modulated in a continuous manner. For instance, with QPSK the carrier instantaneously jumps from a sine to a cosine (i.e. a 90 degree phase shift) whenever one of the two message bits of the current symbol differs from the two message bits of the previous symbol. This discontinuity requires a relatively large percentage of the power to occur outside of the intended band (e.g., high fractional ), leading to poor spectral efficiency. Furthermore, CPM is typically implemented as a constant-envelope waveform, i.e., the transmitted carrier power is constant.Therefore, CPM is attractive because the phase continuity yields high spectral efficiency, and the constant envelope yields excellent power efficiency. The primary drawback is the high implementation complexity required for an optimal receiver. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Continuous_phase_modulation
is Wikipage redirect of	CPFSK Partial response channel Partial response signaling Constant amplitude modulation Continuous-phase frequency-shift keying Continuous phase-frequency-shift keying
is Link from a Wikipage to another Wikipage of	AN/PRC-117 AN/PRC-152 CPM Frequency-shift keying Minimum-shift keying Electromagnetic radio frequency convergence Function generator Index of wave articles Modulation Measurement while drilling CPFSK Constant amplitude modulation Continuous-phase frequency-shift keying Continuous phase-frequency-shift keying
is foaf:primaryTopic of	http://en.wikipedia.org/wiki/Continuous_phase_modulation

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