Sean B Mason

US Patent:

20110013487, Jan 20, 2011

Filed:

Apr 1, 2010

Appl. No.:

12/752239

Inventors:

Shengli Zhou - Mansfield CT, US
Peter Willett - Coventry CT, US
Christian Berger - Pittsburgh PA, US
Sean Mason - Nashua NH, US

Assignee:

University of Connecticut - Farmington CT

International Classification:

H04B 11/00
G01V 1/18

US Classification:

367131, 367134, 367178

Abstract:

Advantageous online and/or real-time OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. The apparatus, systems and methods employ a receiver with a bank of parallel branches, with each branch having a self-correlator matched to a different waveform scaling factor. A detection is declared when any of the branches leads to a correlation metric larger than a pre-defined threshold. The branch with the largest metric yields a Doppler scale estimate and a coarse synchronization point. The proposed apparatus, systems and methods use one OFDM preamble, thereby avoiding the need to buffer the whole data packet before data demodulation and enabling online and/or real-time operation. Thus, the disclosed apparatus, systems and methods are advantageously applicable to UWA communications.