Patent ID: 9742607
Date: 2017-08-22
CPC Classifications: H04L

Claim:
1. A receiver for detecting and recovering payload data from a received signal, the receiver comprising: detector circuitry configured to detect the received signal, the received signal comprising the payload data with first signalling data for use in detecting and recovering the payload data, the first signalling data being carried by a first Orthogonal Frequency Division Multiplexed, OFDM, symbol, and the payload data being carried by one or more second OFDM symbols, and the first OFDM symbol having been combined with a signature sequence, a synchronisation detector comprising a matched filter having an impulse response which has been matched to the differentially encoded signature sequence with the effect that an output of the matched filter generates a signal representing a correlation of the differentially encoded signature sequence with the differentially encoded received signal, and a demodulator configured to recover the first signalling data from the first OFDM symbol for recovering the payload data from the second OFDM symbols, wherein the signature sequence comprises one of a predetermined set of synchronisation sequences, which includes a first synchronisation sequence and one or more second message sequences, the signature sequence having been selected and combined with the first OFDM symbol, the first synchronisation sequence being provided for the receiver to detect and to recover the first signalling data from the first OFDM symbol and the one or more second message sequences representing message information to the receiver, and the receiver including message detector circuitry configured to detect and recover the message information by identifying the second message sequence from amongst the set of second message sequences.