Method and apparatus for duty cycle pre-distortion and two-dimensional modulation

Method and apparatus for duty cycle pre-distortion and two-dimensional modulation

In serial communications, jitter is an unwanted variation of one or more signal characteristics. Two-dimensional modulation circuits and methods incorporate an amplitude pre-emphasis scheme as well as a transmit duty cycle pre-distortion (pre-DCD) technique to reduce jitter. The pre-DCD technique di...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHANG GEOFFREY, DAI XINGDONG
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:In serial communications, jitter is an unwanted variation of one or more signal characteristics. Two-dimensional modulation circuits and methods incorporate an amplitude pre-emphasis scheme as well as a transmit duty cycle pre-distortion (pre-DCD) technique to reduce jitter. The pre-DCD technique directly addresses transition edges of the data signal and is combined with amplitude pre-emphasis to improved data transmission.