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EFFICIENT METHODS AND RECURSIVE/SCALABLE CIRCUIT ARCHITECTURES FOR QAM SYMBOL MEAN AND VARIANCE ESTIMATIONS
EFFICIENT METHODS AND RECURSIVE/SCALABLE CIRCUIT ARCHITECTURES FOR QAM SYMBOL MEAN AND VARIANCE ESTIMATIONS
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机译:QAM符号均值和方差估计的有效方法和递归/可缩放电路体系结构
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摘要
Circuits for producing signals representative of mean and variance estimations for quadrature amplitude modulation (QAM) are provided where the circuits comprise: sequentially repeated first circuit modules and sequentially repeated second circuit modules configured for producing updates in the corresponding estimation iterations. In one embodiment, a closest negative integer power of 2 is used as a substitute multiplicand when multiplying together two or more outputs of hyperbolic function generating units where the substituted for output is less than one. Size and complexity of the corresponding multiplier can then be reduced.
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