4.1 Parameter Settings

To achieve a comparable link budget for all data packet, choose the following data communication and the ranging packets with settings:

For the communication data packet, the settings are:

• Extended dual frequency mode with
  • 1 Mbps data rate
  • 224 preamble symbols
  • 127 sync symbols
  • PPS=4 (see Table 2-1 and Table 2-2)
• 64-byte payload with the following sections
  • 4-byte SSID[31–0]
  • 56-byte encrypted payload with
    • 1-byte resend counter RC[7–0]
    • 1-byte sequence counter SC[7–0]
    • 50-byte payload data[7–0]
    • 4-byte MAC₀ covering the SSID and encrypted payload MAC[31–0]
  • 4-byte FEC code (simple checksum) for the encrypted payload CS[31–0]
• Packet duration: 0.63 ms

The following settings are for the ranging packets:

• Secure ranging proprietary mode2 VR_so/PR_so with:
  • 224 preamble and 160 postamble symbols
  • 127 sync symbols
  • PPS=16 (see Table 3-1)
• 8-byte payload for the verifier VR_so with
  • 4-byte SSID with enabled hardware filtering
  • 4-byte MAC₀ as RNR_v
• 8-byte payload for the prover PR_so with
  • 4-byte SSID with enabled hardware filtering
  • 4-byte MAC_-1 as RNR_p
• Packet duration: 0.39 ms

For the secure ranging modes, both nodes, VR_so and PR_so, must know the actual RNR_v and RNR_p data to allow the synchronous scrambling and descrambling of the payload. For more details, refer to the ATA8352 Impulse-Radio Ultra-Wideband (IR-UWB) Transceiver User’s Guide (DS50003125).