Abstract: A method by which a transmitter and receiver synchronise. The transmitter and receiver are operable in accordance with a protocol which mandates that some transmissions are jittered. The method comprises the transmitter transmitting a pseudo-random seed to the receiver; determining a jitter value based on the pseudo-random seed; and transmitting a synchronisation packet to the receiver at a time determined by the jitter value. The receiver receives the pseudo-random seed from the transmitter; determines timing of a receive window for the synchronisation packet based on the pseudo-random seed; opens the receive window at the determined time; and receives the synchronisation packet within the receive window.