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We study rate-compatible (RC) puncturing algorithms for efficiently-encodable (EE) generalized LDPC (GLDPC) codes of short-to-moderate blocklength. EE-GLDPC codes are systematic codes and well-suited for puncturing, thus they are able to address a rate constraint issue, which is an obvious disadvantage of traditional GLDPC codes. In this work, we propose systematic puncturing algorithms for EE-GLDPC...
The Poisson channel is a popular direct-detection model in optical communication. In this paper, we study efficient data communication over the on-off keyed (OOK) modulated Poisson channel. We first analyze the channel capacity, and based on the analysis we study the application of low-density parity-check (LDPC) codes on such channels. The asymmetric density evolution (ADE) method is used to determine...
In long-haul fiber-optic communication systems, the system performance is affected adversely by both severe physical impairments and amplified spontaneous emission (ASE) noise. Constrained coding, which avoids waveforms in the transmitted signal that are more likely to be detected incorrectly, has been proved to be an effective approach to suppress some physical impairments. However, the constrained...
Principles for designing efficiently-encodable (EE) iteratively-decodable block codes are investigated. We assumed encoding is performed by an erasure-filling decoder and are interested in minimizing encoding time, subject to maintaining good error performance in decoding. We focus on a design parameter, called the recovery vector n, which controls the encoding speed of EE codes. When designing powerful...
We propose two classes of efficiently-encodable GLDPC (EE-GLDPC) codes by generalizing the ideas of IRA and EERC codes. These GLDPC codes have performance as good as ordinary GLDPC codes. Moreover, another advantage of these EE-GLDPC codes is that they are naturally suitable for puncturing. Simulation shows that, at code length around 600, the punctured EE-GLDPC codes can outperform optimized irregular...
For the batch stirred tank reactor (BSTR) of the Multifunction Process and Control Experiment System (MPCE), intelligent hybrid temperature control based on SIMATIC PCS7 is adopted in this paper. Control scheme contains PID controller and fuzzy controller. So this paper discusses how to realize fuzzy control based on the SIMATIC PCS7 process control system. Operating results indicate that transfers...
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