Realistically, about 8 frames per 1 ms can be achieved, but it takes significant effort to achieve this.
The way the regulations work, it is advantageous to only send one packet per 1 ms window from any one given node. The reason is that your spectral density limits, typically -41.3 dBm/MHz, are averaged over 1 ms of time. So if you send more packets in that time, your power has to be reduced, which limits range.
It is okay to have 8 nodes each send in that 1 ms of time as the regulations only apply per node.
It isn’t efficient to have one node emit 8 packets in a row carrying only 8 bytes. You wasted all your air time on preamble and sent very few real bytes. Better to gather the 64 bytes into one packet and send just that.
Using 64 preamble length, 64 MHz PRF, 6.81 Mbs bit rate, 8 byte payload, maximum legal regulatory power, we routinely achieve 50+ meters range between nodes with a properly designed non directional antenna. If we use LNA (low noise amplifier), we can double that to 100+ meters. This is the shortest, fastest packet one can make in a DW1000.
If you use a directional antenna, your transmit power is still limited to the same peak output in the best direction (no range improvement for any given receiver), but you get a gain on the receive side. There is no upper bound to the range you can achieve, it is limited only by the antenna you can build. This one would give you ridiculous range:
This is the Green Bank Telescope (GBT, aka “great big thing”) in WV, USA. The prime surface is 100 meters diameter, and it cost ~100M $US in 2001.
Mike Ciholas, President, Ciholas, Inc
3700 Bell Road, Newburgh, IN 47630 USA
+1 812 962 9408