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METHODS AND APPARATUS FOR OPTIMIZING SHELL MAPPING TECHNIQUES USING AN APPROXIMATED POWER COST FUNCTION
METHODS AND APPARATUS FOR OPTIMIZING SHELL MAPPING TECHNIQUES USING AN APPROXIMATED POWER COST FUNCTION
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机译:利用近似功率成本函数优化壳映射技术的方法和装置
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摘要
To compensate for the substantially non-uniform spacing of constellation points in a pulse code modulation modem, the transmitting power efficiency is substantially maximized while substantially limiting the complexity of the mapping. To optimize the transmitting power efficiency, the present invention suitably determines an approximate cost function g(n) to reduce the complexity and the 2K lowest cost N-tuples (m¿0?,m1,...,mN-1) for power transmission efficiency. Knowing the lowest cost N-tuples, fractional K data bits are systematically mapped uniformly onto the 2?K¿ lowest cost N-tuples.
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