Patent ID: 6314081
Filing Date: 2001-11-06
Classification: H04B,H04W

Abstract:
A communication system, comprising:one or more receivers, each receiver comprising means for synchronizing the receiver to receive the encoded message over the dedicated message frequency and means for integrating the multiple transmissions of portions of the encoded message and the multiple transmission of the encoded message at the receiver, wherein the means for synchronizing performs coarse synchronization of the receiver based on variations in received signal strength and performs fine synchronization of the receiver band on orthogonal datacodes contained in each portion of the encoded message; andone or more transmitters for exchanging communication signals with each of the one or more receivers at a first link margin over one of a plurality of frequencies assigned to one or more specific receivers of the one or more receivers, the transmitters including means for receiving a message to be transmitted to one of the receivers, means for encoding the message, means for transmitting the encoded message over a dedicated message frequency not specifically assigned to any of the receivers at a second link margin higher than the first link margin, the dedicated message frequency being different from the assigned frequencies, wherein the second link margin is provided by bit repetition of the encoded message and wherein the second link margin is further provided by transmitting the encoded message at a second power level higher than a first power level associated with the first link margin.