EXTENDING FIXED-POINT DYNAMIC RANGES

In many advanced control problems such as state estimators, Kalman filters and some high Q filters, the dynamic range/accuracy of the coefficient can sometimes be beyond the range of a Q15 number while the data value can be typically represented as a Q15 number.

This document discusses how you can extend the fixed-point math dynamic range beyond the range of a Q15 number with a minimum of instructions.

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