In this modulation scheme, the transmitter divides a frame into multiple time slots and transmits pulses in a sequence of slots determined by a cryptographic or pseudorandom code. The receiver must possess the same code sequence to synchronize and extract the data. It is heavily used in ultra-wideband communications and military radios to prevent jamming, avoid detection, and allow multiple users to share a channel without catastrophic collisions.
We're using time-hopping on the ultra-wideband link so the sensor nodes don't step on each other's transmissions.
Also heard as
- TH
Related terms
Time division
The multiplexing of multiple signals over a single channel by assigning each a distinct time slot.
CDMA
A channel access method where multiple transmitters send information simultaneously over a single communication channel.
OFDM
Orthogonal Frequency Division Multiplexing, a digital transmission method using multiple subcarriers.