An Optimal Detector for Hierarchical 2n QAM
Abstract
A practical and scalable, optimal detection algorithm is introduced for hierarchical Gray-coded 2n QAM for application in software defined communications. The introduced optimal detection algorithm is based on successive interference cancellation and is equivalent to a successive approximation analog to digital conversion (SAR-ADC). The performance of the optimal detector is discussed in additive white Gaussian noise channels. The proposed detection algorithm needs much less storage space than the conventional optimal detection algorithm followed by table lookup.
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