Tuesday, 20 September, 2011
16:45 -- 18:30
Room B

Tu.6.B • Digital Signal Processing

 

Chair: Yutaka Miyamoto; NTT, Japan
 
Tu.6.B.1 • 16:45
Mitigation of Intra-Channel Nonlinearities Using a Frequency-Domain Volterra Series Equalizer
Fernando P. Guiomar1,2, Jacklyn D. Reis1,2, Antonio Teixeira1,2, Armando N. Pinto1,2; 1Department of Electronics, Telecommunications and Informatics, University of Aveiro, Portugal; 2Instituto de TelecomunicaƧƵes, Portugal.
We apply a frequency-domain Volterra series nonlinear equalizer to a 20Gbaud NRZ-QPSK signal propagated over 1600km. Using 2 samples/symbol we obtain a 2dB improvement on the nonlinear tolerance over backward propagation split-step Fourier method.
 
Tu.6.B.2 • 17:00 (Invited)
Electronic Pre-equalization Technologies using High-Speed DAC
Takashi Sugihara1, Tatsuya Kobayashi1, Takafumi Fujimori1, Takashi Mizuochi1; 1Mitsubishi Electric Corporation, Japan.
A high-speed DAC for optical communications is introduced. To achieve a DAC suitable for digital signal processor based high order modulation, an interleaved DAC and a high-speed multiplexer become key technologies.
 
Tu.6.B.3 • 17:30
Mixed Bit Rate DWDM Transmission of 112Gb/s PM-QPSK Signals over a Dispersion Managed Link using Real-Time DSP to Assess Nonlinear Distortions
Emmanuel Le Taillandier de Gabory1, Manabu Arikawa1, Daisaku Ogasahara1, Kiyoshi Fukuchi1; 1System Platforms Research Laboratories, NEC Corporation, Japan.
Real-time evaluation of mixed rate DWDM transmission of 112Gb/s PM-QPSK signals over 1072km CD managed link shows a penalty from nonlinear distortions below 0.14dB with 43Gb/s PM-BPSK and PM-QPSK neighbors and 0.81dB with 10.7Gb/s neighbors.
 
Tu.6.B.4 • 17:45
Statistics and Performance under Combined Impairments Induced by Polarization-Dependent-Loss in Polarization-Division-Multiplexing Digital Coherent Transmission
Kunihiko Mori1, Tomoyoshi Kataoka1, Takayuki Kobayashi1, Shingo Kawai1; 1NTT Network Innovation Labs., Japan.
Two-dimensional statistics and Q-penalty performance under the combination of two major impairments induced by PDL for over-100-Gb/s polarization-division-multiplexing digital coherent transmission have been presented for the first time to estimate outage probability necessary for designing the system.
 
Tu.6.B.5 • 18:00
Performance of Soft-Decision FEC in Systems with Bivariate Gaussian Noise Distributions
Junho Cho1, Chongjin Xie2, Peter J. Winzer2; 1Bell Labs, Alcatel-Lucent, Republic of Korea; 2Bell Labs, Alcatel-Lucent, USA.
We demonstrate through analysis and Monte Carlo simulations how general bivariate Gaussian noise impacts the performance of soft-decision low-density parity-check (LDPC) codes designed for additive, circularly symmetric Gaussian noise.
 
Tu.6.B.6 • 18:15
Generalized Pulse-Position Modulation for Optical Power-Efficient Communication
Magnus Karlsson1, Erik Agrell2; 1Photonics Lab., Dept. of Microtechnology and Nanoscience, Chalmers University of Technology, Sweden; 2Communication Systems Group, Signals and Systems Dept., Chalmers University of Technology, Sweden.
A family of modulation formats is derived by combining pulse-position modulation (PPM) with multilevel dual-polarization signal constellations. With 16-PPM, gains of up to 5.4 dB are obtained over dual-polarization QPSK, at the cost of reduced spectral efficiency.

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