Patent ID: 6373899
Filing Date: 2002-04-16
Classification: H04L

Abstract:
In a burst-type communication system comprising a transmitter and a receiver, a method of communicating information in a preamble synchronization sequence of a burst transmission, comprising:selecting, at the transmitter, a selected one of a plurality of initial detection sequences, representing one or more first preamble information bits; selecting, at the transmitter, a selected one of a plurality of unique words, representing one or more second preamble information bits; transmitting, at the transmitter, said preamble synchronization sequence comprising said selected one initial detection sequence and said selected one unique word; receiving, at the receiver, said preamble synchronization sequence; detecting, at the receiver, said one initial detection sequence to produce first time synchronization information and to receive said one or more first preamble information bits; and detecting, at the receiver, said one unique word to produce second time synchronization information and to receive said one or more second preamble information bits; differentially encoding, at the transmitter, said preamble synchronization sequence before transmitting said preamble synchronization sequence; and differentially decoding, at the receiver, said preamble synchronization sequence before detecting said one initial detection sequence and before detecting said one unique word, wherein the plurality of initial detection sequences comprises one or more pairs of initial detection sequences, wherein each pair of initial detection sequences comprises a first initial detection sequence and a second initial detection sequence, said second initial detection sequence being a logical inverse of said first initial detection sequence.