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- Q5165504 subject Q8084980.
- Q5165504 subject Q8619071.
- Q5165504 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 out-of-band power), 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.".
- Q5165504 wikiPageExternalLink cpmdistance.php.
- Q5165504 wikiPageExternalLink 49IyerSeshadriCISS2k7.pdf.
- Q5165504 wikiPageWikiLink Q1045555.
- Q5165504 wikiPageWikiLink Q1113935.
- Q5165504 wikiPageWikiLink Q1165717.
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- Q5165504 wikiPageWikiLink Q750463.
- Q5165504 wikiPageWikiLink Q761942.
- Q5165504 wikiPageWikiLink Q80091.
- Q5165504 wikiPageWikiLink Q806263.
- Q5165504 wikiPageWikiLink Q8084980.
- Q5165504 wikiPageWikiLink Q83886.
- Q5165504 wikiPageWikiLink Q8619071.
- Q5165504 wikiPageWikiLink Q8805.
- Q5165504 wikiPageWikiLink Q93344.
- Q5165504 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.".
- Q5165504 label "Continuous phase modulation".