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Fast Argument Quantization [SP Tips&Tricks]

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2 Author(s)
Nilsson, J.-O. ; Dept. of Signal Process., KTH R. Inst. of Technol., Stockholm, Sweden ; Handel, P.

A quantized low-resolution argument of a complex number or two-dimensional vector is required in many digital signal processing algorithms. Examples include APSK code demodulation for which it may be used to evaluate the Voronoi diagram; low-level processing for many computer vision methods that exploit histograms of gradient sample arguments, e.g., SIFT and HOG; and phase tracking/frequency estimation for which it may be used as a low-cost phase approximation. Often, such quantized arguments will have to be computed many times and under real-time constraints. Therefore, efficient solutions to these calculations are of interest.

Published in:

Signal Processing Magazine, IEEE  (Volume:30 ,  Issue: 6 )

Date of Publication:

Nov. 2013

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