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Performance Analysis of Irregular Non-binary LDPC Coded Modulation over Atmospheric Turbulence Channel

Dashe Li, Yuan Li, Zhiyong An, Shue Liu


Irregular non-binary LDPC codes have better error performance than binary ones. A channel model is established for atmospheric transmission channels under turbulence, and irregular non-binary LDPC coding and modulation systems are built based on this. Then, a stimulation platform is built and the LOG-FFT-BP algorithm is applied in hardware implementation of irregular non-binary LDPC coding. The results show that compared with binary LDPC codes, with the increase of the signal to noise ratio, the system bit error rate of non-binary ones is declined sharply and the performance is obviously improved.


irregular non-binary LDPC, atmospheric turbulence, channel model.

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