PSBT

PSBT

The PSBT (Phase Shaped Binary Transmission) is a type of modulation format for digital transmissions.

It is most commonly used in optical systems (WDM and OTDM) because of its increased tolerance to chromatic dispersion and reduced bandwidth occupation, with respect to the typically used NRZ scheme.

It is derived from the duobinary format, and is characterised by a phase-shift of π radians between a transition from binary "0" (space) to "1" (mark), and vice-versa.




"Figure : An example of a PSBT signal. Notice the zero amplitude during the transition from 0 to 1 and 1 to 0."

See also

* Modulation Formats

References

* D. Penninckx, M. Chbat, L. Pierre, and J.-P. Thiery, "The phase-shaped binary transmission (PSBT): A new technique to transmit far beyond the chromatic dispersion limit," "IEEE Photonics Technology Letters", vol. 9, pp. 259–261, Feb. 1997.


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