STS Parameters (802.15.4 HRP UWB)

The STS Parameters group configures the STS (scrambled timestamp sequence), based on the selected STS Packet Configuration. The STS Parameters are only visible when an ERDEV PHY Mode is selected (ERDEV-BPRF or ERDEV-HPRF). The STS Parameters do not apply when STS Packet Configuration is set to No STS (0).

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

For the ERDEV-BPRF PHY Physical Layer mode, Segment Length is fixed at 64.

For the ERDEV-HPRF PHY mode, Segment Length is selectable.

Choices: 32, 64, 128, 256

Default: 64

Number of Segments specifies the total number of segments in the STS field.

For the ERDEV-BPRF PHY mode, Number of Segments is fixed at 1.

For the ERDEV-HPRF PHY mode, Number of Segments is selectable.

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

Choices: 1, 2, 3, 4

Default: 1

Extra Gap (x4 chips) species an extra gap (in units of 4 chips) between the Payload and the beginning of STS.

Extra Gap (x4 chips) is only applicable (visible) when STS Packet Configuration is set to After PHR/Payload (2).

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

Range: 0-127

Default: 0

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 STS 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 STS 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 STS signal.