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DTSTAMP:20260417T014249Z
CREATED:20080325T161006Z
UID:ATEvent-1dcb5073d9bdcc24994d762d5b8be8a0
LAST-MODIFIED:20100830T143749Z
SUMMARY:UTM Lab Meeting\: Algorithms for DSP implementation in Coherent Optical Systems
DTSTART:20080403T130000Z
DTEND:20080403T140000Z
DESCRIPTION:Coherent optical communications have gained renewed intere
 st due to the availability of high speed digital signal processing\, l
 ow priced components as well as partly relaxed receiver requirements a
 t high data rates. When the outputs of a coherent homodyne receiver ar
 e sampled at the Nyquist rate\, the digitized waveform contains full i
 nformation of the electric field\, preserving the amplitude\, phase an
 d polarization from the optical domain to the electrical domain\, enab
 ling new potential of multi-level signaling (M-ary PSK and M-ary QAM m
 odulation)\, as well as the possibility of exploring polarization mult
 iplexing. Additionally\, it enables quasi-exact compensation of linear
  transmission impairments such as Chromatic Dispersion (CD) and Polari
 zation Mode Dispersion (PMD) by a linear filter. Digital Signal Proces
 sors (DSP) has been evolving as a practical solution for robust optica
 l long-haul transmission\, and it is expected that data converters wil
 l be able to satisfy the required high sampling rates in the near futu
 re. We will present the computer simulations results of algorithms for
  compensation of CD and PMD in a coherent optical system exploiting po
 larization multiplexing. The benefits of combining a phase estimation 
 algorithm with a decision directed least-mean-square equalizer in a fe
 edback configuration will be shown.
LOCATION:INESC Porto\, Auditorium
CONTACT:Luís Pessoa \, 222094200 \, lpessoa@inescporto.pt
CLASS:PUBLIC
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