Method of Performing UWB Radio Frequency Frame Validation in Ranging Applications

A method for performing ultra-wide band (UWB) radio frequency (RF) frame validation, wherein an UWB frame comprises:

• a synchronisation header (SYNC) field for synchronisation between a transmitter and a receiver, and
• a scrambled timestamp sequence (STS) field for providing additional integrity and security for ranging measurements;
• the method comprising:
• receiving a SYNC channel impulse response (CIR) of an UWB frame;
• receiving an STS CIR of the UWB frame;
• comparing a peak amplitude value of the SYNC CIR to a peak amplitude value of the STS CIR;
• wherein:
• if a difference between the peak amplitude value of the SYNC CIR and the peak amplitude value of the STS CIR is greater than a predetermined magnitude difference threshold, the method includes rejecting the UWB frame;
• and
• if the difference is less than or equal to the predetermined magnitude difference threshold, the method includes:
• comparing a polarity of the SYNC CIR to a polarity of the STS CIR;
• when the polarity of the SYNC CIR is different from the polarity of the STS CIR, rejecting the UWB frame;
• and
• when the polarity of the SYNC CIR matches the polarity of the STS CIR, accepting the UWB frame.