In this experiment, beacons are placed between 2-3.5m apart.  The transmitting power is altered based on the distance the device is from the beacon.  A range from 0dBm's to -10dBm's is used in this experiment.  With these parameters in mind, the researchers found that there was an improvement in the error and accuracy of the BLE beacons when their method of triangulation is applied.  This improvement can be seen in Figure 19.