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. 2018 Jun 7;18(6):1875. doi: 10.3390/s18061875

Table 6.

UWB variables: radio, MAC, standard levels.

	Symbol	Variable Name	Unit
Radio	$T_{p a c k e t}$	Frame duration	ms
	$T_{S H R}$	Synchronization header (SHR) duration	ms
	$T_{P H R}$	PHY header (PHR) duration	ms
	$T_{D A T A}$	PHY service data unit duration	ms
	$L_{p r e a m b l e}$	Preamble length	symbols
	$L_{S F D}$	Start of frame delimiter (SFD) length	bits
	$L_{R e e d}$	Reed Solomon bits	bits
	$L_{D A T A}$	Data length	bits
	$τ_{S H R}$	SHR symbols duration	ms
	$τ_{P H R}$	PHR symbols duration	ms
	$τ_{D A T A}$	Data symbols duration	ms
	$P R F$	Pulse repetition frequency	Hz
	$P_{T X}$	Transmission power	dBm
	$S_{i}$	Receiver sensitivity	dBm
	$C h$	Channel number	unitless
	$P L$	Path loss model	unitless
MAC	$T_{r e p l y}$	Reply time in TWR	ms
	$T_{t x}$	Transmission duration	ms
	$T_{s y n c}$	Synchronization beacon duration	ms
	$T_{b e a c o n}$	Beacon duration	ms
	$T_{C A P}$	Contention Access Period (CAP) duration	ms
	$T_{C F P}$	Contention Free Period (CFP) duration	ms
	$T_{s u p e r f r a m e}$	Superframe duration	ms
	$n_{r e s o u r c e s}$	Resources available	unitless
	$n_{a n c h o r s}$	Number of anchors	unitless
	$n_{e x c h a n g e}$	Number of message exchanges	unitless
	N	Number of supported tags	unitless
	$λ$	Position update frequency	Hz
LDC	$T_{o n}$	Transmitter on time	ms
LDC	$T_{o f f}$	Transmitter off time	ms
DAA	$D_{t h r e s h}$	Power level threshold	dBm
	$P_{T X_{v i c t i m}}$	Transmit power of victim system	dBm
	I	Minimum needed isolation	dBm