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D2119 Dart RTLS User Guide 70
New algorithm incorporates pre-pruning and pruning. Pre-pruning is an improvement in
location algorithm which detects and removes late receivers. Only significant reflection issues
can be resolved with pre-pruning. Algorithm always performs pre-pruning.
Example:
Without pre-pruning: ‘Locates %’ are less due to non-convergence.
With pre-pruning: ‘Locates %’ improve, as bad receivers are removed. But min receiver errors
increase as there might not be enough receivers left to locate after the late ones are removed.
Pruning relies on over determination and can further improve location calculation. Tag blink
timings from receivers are analyzed and incorrect ones are dropped, provided more than
enough receivers provide blink timing. With Pruning enabled, the system performs the
Calculate - Validate - Optimize iteration until a valid location is obtained or pruning limit is
reached.
Example:
Without Pruning:
With Pruning: