RIF Parameters (802.15.4 HRP UWB)

The RIF Parameters group configures the RIF (ranging integrity fragment). The RIF Parameters are part of the MMS (multimillisecond) signal settings and are only visible when PHY Mode is set to ERDEV HPRF, STS Packet Configuration is set to After SFD Start frame delimiter, no data (3), and the MMS Packet checkbox is selected.

Number of RIFs specifies the total number of RIF segments present in the frame.

There are gaps between RIF segments. The RIF Avg Power calculation displayed in the Syms/Errs Table includes these in the average.

Choices: 0, 1, 2, 4, 8

Default: 1

Segment Length (x512 chips) selects the length of each RIF segment (specified in units of 512 chip blocks).

Choices: 16, 32, 64, 128, 256

Default: 64

Add 1 ms Gap between RSFs and RIFs species an extra 1 ms gap between the RIF and the last RSF (i.e. the first RIF comes 2 ms after the beginning of the last RSF instead of 1 ms after).

The RIF Avg Power calculation displayed in the Syms/Errs Table includes gaps in the average.

Default: Disabled

Key (128 bits) - AES Advanced Encryption Standard: A recent encryption standard based on the Rijndael algorithm, AES has been approved by the US National Institute of Standards and Technology (NIST) for the Federal Information Processing Standard (FIPS-197). AES is a symmetric encryption algorithm that will be used by U.S. Government organisations and many other organisations in the future, to protect the transmission of sensitive information. AES is being incorporated into the IEEE 802.11i standard for 802.11 WLAN security.-128 encryption key that is 32 hex digits long, specified as a hex string (optionally prefixed by "0x"). It is used with Upper Part of V and Initial Count to configure the DRBG (deterministic random bit generator), which is used to generate the RIF signal.

Upper Part of V (96 bits) - The value of V is the value that is AES-128 encrypted to give an iteration of the DRBG sequence. Upper Part of V is 24 hex digits long, specified as a hex string (optionally prefixed by "0x"). It is used with Key and Initial Count to configure the DRBG (deterministic random bit generator), which is used to generate the RIF signal.

Initial Count (32 bits) - Specifies the lower part of V. It is incremented for each iteration of the DRBG. Initial Count is 8 hex digits long, specified as a hex string (optionally prefixed by "0x"). It is used with Key and Upper Part of V to configure the DRBG (deterministic random bit generator), which is used to generate the RIF signal.