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Comparison and analysis of codes for remodulation WDM-PON with adaptive code selection
Line codes Code efficiency WDM-PON Remodulation
2016/12/2
In a remodulation PON, the upstream signal quality can be improved when the downstream signal is coded. But low code efficiency may result in network congestion in downlink. Based on the downlink traf...
Layered Decoding of Nonbinary LDPC Codes Suitable for High-Speed Optical Communications
Optical communications Forward error correction Low-density parity- check codes
2015/5/25
We propose using layered update rule in decoding nonbinary LDPC codes. Only 10-15 iterations suffice for good performance. Also, for the same BER performance, it increases throughput by twofold compar...
4096-ary OCDM at 2.5 Gbit/s using multidimensional PSK codes with a single multi-port encoder/decoder
4096-ary OCDM multidimensional PSK code encoder/decoder
2015/5/15
A record 4096 (=16X16X16)-ary OCDM system at 2.5Gbps using multidimensional phase shift keying (PSK) codes with a single multi-port optical encoder/decoder has been demonstrated for the first time. An...
Demonstration of 8-channels Simultaneous Multiplexing Using 8-chip Electrical Codes for 10 Gbit/s ECDM-PON
Fiber optics communications Multiplexing
2015/6/9
First time 8-channels electrically code division multiplexing technique for optical access networks is demonstrated at a chip-rate of 10 Gchip/s. The technique enables error-free transmission of 1.25 ...
Link Performance Improved 16QAM-OFDM 60-GHz Radio-over-Fiber System Employing Convolutional Codes
Fiber optical communications Fiber optics links subsystems
2015/6/8
We demonstrated the first transmission of 750-Mb/s 16QAM-OFDM signal over 1-km SMF-28 and 6-m air-link with 60-GHz ROF technology. The system improvement and low-power efficiency of RF transmitter are...
Concatenated QC-LDPC and SPC Codes for 100 Gbps Ultra Long-Haul Optical Transmission Systems
Fiber optics communications Optical communications
2015/6/8
We propose and investigate a novel FEC coding scheme based on a concatenation of QC-LDPC with single-parity-check codes. High performance of a Q-limit of 5.8 dB with 20.5% overhead has been achieved w...
PDL Mitigation in PolMux OFDM Systems using Golden and Silver Polarization-Time Codes
Fiber optics communications Optical communications Modulation
2015/6/4
Polarization-Time coding can highly mitigate PDL impairments in optical OFDM sys-tems. The performances of two full-rate Polarization-Time codes, the Golden and Silver codes, have been evaluated showi...
Integration of Individual Simulation Codes for Fast Ignition
Fast ignition Distributed computing Code integration
2009/6/8
Overall fluid dynamics of the implosion, laser-plasma interaction and super hot electron generation, and super hot electron energy deposition within the core are key issues in the Fast Ignition scheme...
Multi-rate transmissions on spectral amplitude coding optical code division multiple access system using random diagonal codes
optical code division multiple access (OCDMA) bit error rate (BER)
2011/5/6
In this paper, we study the use of a new code called random diagonal (RD) code for spectral amplitude coding (SAC) optical code division multiple access (OCDMA) networks, using fiber Bragg-grating (F...
LDPC Codes and Stochastic Decoding for Beyond 100 Gb/s Optical Transmission
LDPC Codes Stochastic Optical Transmission
2015/8/4
We present a modified stochastic LDPC decoding algorithm suitable for implementation at 100-Gb/s and above. The stochastic decoding is invented for low-precision digital circuits, and as such is suita...