Simultaneous Sampling Algorithm for Sensors Spread Over a Wide Area
2. Check for interference with transmitters at higher priority levels. If there is no interference, proceed to step 3. If there is interference, raise the priority level by 1 and do not transmit.
3. Check whether the transmitter’s location can be calculated using distance information from receivers that are able to receive ultrasound. If the location can be calculated, transmit ultrasound. If calculation is not possible, raise the priority level by 1.
The following graph compares the results from simulations for ultrasound transmission conducted using the time division method (conventional method), and the simultaneous sampling algorithm method. When using the time division method, sampling frequency decreases rapidly as the number of transmitters rises, making increasing the number of transmitters problematic. With the simultaneous sampling algorithm, sampling is possible at approximately 10 Hz per transmitter even when using 100 transmitters. Compared to the conventional method, it is possible to maintain a higher sampling frequency as the number of transmitters is increased.
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