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Systems and methods for wireless communication over a wide bandwidth channel using a plurality of sub-channels

  • US 7,289,494 B2
  • Filed: 12/06/2001
  • Issued: 10/30/2007
  • Est. Priority Date: 12/06/2001
  • Status: Expired due to Fees
First Claim
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1. A transmitter, comprisinga 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.

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