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Apparatus for improved underwater acoustic telemetry utilizing phase coherent communications

  • US 5,301,167 A
  • Filed: 08/05/1992
  • Issued: 04/05/1994
  • Est. Priority Date: 08/05/1992
  • Status: Expired due to Fees
First Claim
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1. Apparatus for high data rate digital underwater communication over an underwater acoustic channel comprising:

  • means including a transmitter at a first location for horizontally transmitting a carrier modulated by a phase coherent stream of data corresponding to symbols;

    means including a receiver at a second location for detecting and demodulating said stream to remove channel induced degradations in said stream, said receiver including means for decision feedback equalization, thereby to recover undegradated data in the form of symbols; and

    ,means for displaying said received symbols, whereby phase coherent communications is established despite an underwater acoustic channel which changes rapidly and ordinarily restricts the data rate.

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