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Low-Density Parity-Check (LDPC) codes are very efficient error control codes that are being considered as part of many next generation communication systems. In this paper FPGA implementations of two low complexity decoders are presented. These two implementations operate over any kind of parity check matrix, (including those randomly generated, structurally generated, either systematic or non systematic)...
In this paper we introduce the implementation of a block-LDPC codec on FPGA with simulation. The result shows that this codec is suitable for block LDPC with less resource consumption.
This paper delivers a block-based parallel convolutional decoding architecture in which several Viterbi decoders work concurrently to decode consecutive code blocks. Each code block contains a preamble and a postamble which are duplicate data from neighbor blocks. Preamble and postamble are beneficial to the continuity and correctness of decoding output. Simulation results demonstrate that this architecture...
Low-density parity-check (LDPC) codes have been demonstrated to perform very close to the Shannon limit when decoded iteratively. However challenges persist in building practical high-throughput decoders due to the existence of error floors at low error rate levels. We apply high-throughput hardware emulation to capture errors and error-inducing noise realizations, which allow for in-depth analysis...
According to the problem that the laser signal will produce serious distortion and BER increases affected by influences of the space channel environment including atmospheric turbulence, refraction and so on, the forward error correction (FEC) technique is adopted. Meanwhile, technologies for the laser communication system such as encode, interleaving, decode have been discussed in details. RS code...
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