Optical data exchange of 100-Gbit/s DQPSK signals

Optical LDPC decoders for beyond 100 Gbits/s optical transmission.

We present an optical low-density parity-check (LDPC) decoder suitable for implementation above 100 Gbits/s, which provides large coding gains when based on large-girth LDPC codes. We show that a basic building block, the probabilities multiplier circuit, can be implemented using a Mach-Zehnder interferometer, and we propose corresponding probabilistic-domain sum-product algorithm (SPA). We per...

Optical DQPSK Modulation Performance Evaluation

Optical Signal Processing: Data Exchange

Designing a smart algorithm for determining stock exchange signals by data mining

One of the most important problems in modern finance is finding efficient ways to summarize and visualize the stock exchange market. This research proposes a smart algorithm by means of valuable big data that is generated by stock exchange market and different kinds of methodology to present a smart model.In this paper, we investigate relationships between the data and access to their lat...

Joint Demapping and Decoding for DQPSK Optical Coherent Receivers

We present a low-complexity joint demapper-decoder scheme for coherent optical receivers with DQPSK modulation. The new technique reduces to 0.7dB the gap between QPSK and DQPSK in 100Gb/s coherent optical systems.