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misc:investigations:lps-max-range [2017-03-21 16:10] kristoffer created |
misc:investigations:lps-max-range [2017-04-18 18:16] arnaud |
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==== The setup ==== | ==== The setup ==== | ||
- | We used one anchor and one Crazyflie with a Loco Position Deck mounted. The system was set up in the Two way ranging mode, that is each ranging is actually 4 packets sent back and forth and The ranging operation is initiated by the Crazyflie deck. | + | We used one anchor and one Crazyflie with a Loco Position Deck mounted. The system was set up in the Two way ranging mode, that is each ranging is actually 4 packets sent back and forth between the Crazyflie |
- | The LEDs on the deck and anchor indicates when the module is in transmit and receive mode as well as when data is received accurately. Our measurement method was simply to walk away from the anchor with the Crazyflie and watch the LEDs and observe when we stared to loose packets. | + | The LEDs on the deck and anchor indicates when the module is in transmit and receive mode as well as when a ranging operation |
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+ | The radios are setup on //channel 2// with preamble rate of //64MHz//, preamble lenght of 128 and datarate of // | ||
=== Power settings === | === Power settings === | ||
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Indoors there are walls, the floor and other objects that bounces and echoes the radio waves sent out by the system. Outside there are usually fewer obstacles and typically only the ground that effects the transmitted energy. Obviously this makes a difference and we wanted to see if we could measure it. | Indoors there are walls, the floor and other objects that bounces and echoes the radio waves sent out by the system. Outside there are usually fewer obstacles and typically only the ground that effects the transmitted energy. Obviously this makes a difference and we wanted to see if we could measure it. | ||
- | Note that echoes might actually be something good that increases | + | Note that for an ultra-wideband system echo and multipath can actually |
The " | The " | ||
- | For outdoors measurements we used the street outside the office. It is fairly open but the buildings on the sides are probably affecting the results somewhat. | + | For outdoors measurements we used the street outside the office. It is fairly open but the buildings on the sides are probably affecting the results somewhat. |
=== Antenna orientation === | === Antenna orientation === |