Method of synchronizing an independent data device of a wireless data communications system on an incident pulsed signal of the ultra wide band type, and corresponding independent data device

A data device comprising:

• a receiver for receiving an incident pulsed signal of an ultra wide band type over a channel, the incident pulsed signal comprising a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity and time-hopping codes;
• and
• a synchronizer comprising
• a cross-correlation circuit for performing a cross-correlation of the incident pulsed signal with the training sequence, the cross-correlating including algebraically summing in accordance with a polarity code, windows of the incident pulsed signal, with starting points of the windows being determined by the time-hopping code, and
• a detection circuit for detecting an end point of the preamble based upon a result of the cross-correlation performed by said cross-correlation circuit.

A wireless data communications system comprising:

• a plurality of data devices, each data device comprising
• a receiver for receiving an incident pulsed signal of an ultra wide band type over a channel, the incident pulsed signal comprising a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity and time-hopping codes, and
• a synchronizer comprising
• a cross-correlation circuit for performing a cross-correlation of the incident pulsed signal with the training sequence, the cross-correlating including algebraically summing in accordance with a polarity code, windows of the incident pulsed signal, with starting points of the windows being determined by the time-hopping code, and
• a detection circuit for detecting an end point of the preamble based upon a result of the cross-correlation performed by said cross-correlation circuit.