Patent ID: 7289494
Filing Date: 2007-10-30
Classification: H04B

Abstract:
1. A transmitter, comprising a serial-to-parallel transmitter structured to transform a single serial bit stream comprising messages for a plurality of communication devices into a plurality of bit streams; a time division modulator structured to perform time division modulation on each of the plurality of bit streams; a filter structured to apply a required pulse shaping to each of the plurality of bit streams: a frequency shifter structured to shift each of the plurality of bit streams in frequency by a required amount; and a summer structured to sum the plurality of bit streams into a single transmit signal; wherein the time division modulator comprises, for each bit stream; a sub-block repeater structured to take a sub-block of data from the bit stream and form a new sub-block comprising the original sub-block repeated two or more times; a block terminator structured to add a termination prefix to the new sub-block; and a sync inserter structured to periodically insert a synchronization code into the bit streams.