PPM_TX_Pulse_Generator

The PPM_TX_Pulse_Generator output represents a pulse position modulated UWB waveform. Input data bits are spread using a spreading code.

The pulse shape output is determined by selecting sub-components of PULSE_SHAPE_GENERATOR; for details, refer to PULSE_SHAPE_GENERATOR".

Subnetwork

Name	Description	Default	Unit	Type	Range
TStepsPerPPMBitOffset	Length of offset between a value of 1 and 0 in a PPM modulated code; Length is given in the number of TStep long intervals in the offset time. This make the offset between 0 and 1 an integer number of possible pulse positions	1		Integer	>0
ChipsPerBit	Number of pulses transmitted for each bit	1		Integer	>0
TStepsPerDither	Determines number of simulation time steps between each possible position.	1		Integer	>0
DitherBits	Number of bits used to the dither position of a PPM pulse within each pulse interval. 2 DitherBits pulse positions are possible within each PPM pulse interval.	5		Integer	>0
ChipInterval	Time between pulses	1 nsec	Time	Real	>0
PulseWidth	Width of output pulse	250 psec	Time	Real	>0
PulseEnergy_joule	Total energy of the output pulse in Joules.	1e-12		Real	>0
DoubletSeparation	Time between the positive and negative peaks of the waveform	350 psec	Time	Real	>0
TStep	Time step of the simulation	10 psec	Time	Real	>0

Pin	Name	Description	Signal Type
1	Data Input	Data transmitted by UWB system input as binary bits.	Integer
2	Spreading Code Input	Coding sequence used to spread data being transmitted input as binary bits.	Integer

Pin	Name	Description	Signal Type
3	Pulse Output	Outputs pulse with shape determined by which pulse generator subcomponent is selected.	Float