TY - JOUR
T1 - Anatomy of a digital coherent receiver.
AU - Borkowski, Robert
AU - Zibar, Darko
AU - Tafur Monroy, Idelfonso
N1 - INVITED PAPER. Special Section on EU’s FP7 ICT R&D Project Activities on Future Broadband Access Technologies
PY - 2014
Y1 - 2014
N2 - Digital coherent receivers have gained significant attention in the last decade. The reason for this is that coherent detection, along with digital signal processing (DSP) allows for substantial increase of the channel capacity by employing advanced detection techniques. In this paper, we first review coherent detection technique employed in the receiver as well as the required receiver structure. Subsequently, we describe the core part of the receiver — DSP algorithms — that are used for data processing. We cover all basic elements of a conventional coherent receiver DSP chain: deskew, orthonormaliation, chromatic dispersion compensation/nonlinear compensation, resampling a nd timing recovery, polarization demultiplexing and equalization, frequency and phase recovery, digital demodulation. We also describe novel subsystems of a digital coherent receiver: modulation format recognition and impairment mitigation via expectation maximization, which may gain popularity with increasing importance of autonomous networks.
AB - Digital coherent receivers have gained significant attention in the last decade. The reason for this is that coherent detection, along with digital signal processing (DSP) allows for substantial increase of the channel capacity by employing advanced detection techniques. In this paper, we first review coherent detection technique employed in the receiver as well as the required receiver structure. Subsequently, we describe the core part of the receiver — DSP algorithms — that are used for data processing. We cover all basic elements of a conventional coherent receiver DSP chain: deskew, orthonormaliation, chromatic dispersion compensation/nonlinear compensation, resampling a nd timing recovery, polarization demultiplexing and equalization, frequency and phase recovery, digital demodulation. We also describe novel subsystems of a digital coherent receiver: modulation format recognition and impairment mitigation via expectation maximization, which may gain popularity with increasing importance of autonomous networks.
KW - Digital coherent receiver
KW - Coherent detection
U2 - 10.1587/transcom.E97.B.1528
DO - 10.1587/transcom.E97.B.1528
M3 - Article
SN - 0916-8516
VL - E97-B
SP - 1528
EP - 1536
JO - IEICE Transactions on Communications
JF - IEICE Transactions on Communications
IS - 8
ER -