Abstract
In this paper, an adaptive optimal shaping gain selection method based on huffman coding is proposed. By nonuniform mapping, the input signal satisfies the optimal (secondary) distribution under different SNR, that is, the input signal is infinitely close to Maxwell Boltzmann distribution, so that the channel capacity wirelessly approaches the Shannon limit. The method not only improves the transmission performance of the system, increases the shaping gain, but also saves the algorithm complexity and system cost, and realizes the optimal distribution of the optimal (secondary)input signals under different SNR, thereby infinitely approaching the high-speed transmission of the channel capacity.
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