Article

On the reduced-complexity of LDPC decoders for ultra-high-speed optical transmission

Department of Electrical and Computer Engineering, University of Arizona, Tucson, Arizona 85721, USA.
Optics Express (Impact Factor: 3.49). 10/2010; 18(22):23371-7. DOI: 10.1364/OE.18.023371
Source: PubMed

ABSTRACT

We propose two reduced-complexity (RC) LDPC decoders, which can be used in combination with large-girth LDPC codes to enable ultra-high-speed serial optical transmission. We show that optimally attenuated RC min-sum sum algorithm performs only 0.46 dB (at BER of 10(-9)) worse than conventional sum-product algorithm, while having lower storage memory requirements and much lower latency. We further study the use of RC LDPC decoding algorithms in multilevel coded modulation with coherent detection and show that with RC decoding algorithms we can achieve the net coding gain larger than 11 dB at BERs below 10(-9).

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Available from: Ivan B Djordjevic, Jul 14, 2015
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    • "The number of iterations is set to 50. The code has prospects of future implementation on field-programmable gate arrays (FPGAs) based on reduced-complexity algorithms [28]. Since we want to study the performance of the hardware rather than the code performance, using the SPA satisfies our requirement. "
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    Full-text · Article · Jul 2011 · Journal of Optical Communications and Networking
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    • "The number of iterations is set to 50. The code has prospects of future implementation on field-programmable gate arrays (FPGAs) based on reduced-complexity algorithms [28]. Since we want to study the performance of the hardware rather than the code performance, using the SPA satisfies our requirement. "
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