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DTSTAMP:20260514T021231Z
CREATED:20080325T161006Z
UID:ATEvent-1490aa9712e5ef7197d4806daa8d37e3
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.\nDigital Signal Proce
 ssors (DSP) has been evolving as a practical solution for robust optic
 al long-haul transmission\, and it is expected that data converters wi
 ll be able to satisfy the required high sampling rates in the near fut
 ure.\nWe will present the computer simulations results of algorithms f
 or compensation of CD and PMD in a coherent optical system exploiting 
 polarization multiplexing. The benefits of combining a phase estimatio
 n algorithm with a decision directed least-mean-square equalizer in a 
 feedback configuration will be shown.
LOCATION:INESC Porto\, auditório
CONTACT:Luís Pessoa\, 222094200\, lpessoa@inescporto.pt
CLASS:PUBLIC
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