US Patent:
20130208768, Aug 15, 2013
Inventors:
Aijun Song - Bear DE, US
Mohsen Badiey - Newark DE, US
Assignee:
University of Delaware - Newark DE
International Classification:
H04B 15/00
H04B 13/02
Abstract:
Methods and systems for acoustic multiple-input/multiple-output (MIMO) communication in an underwater environment. The method includes: a) receiving signals at multiple receivers representing transmitted signals from multiple transmitters, b) estimating channel responses between the multiple receivers and the multiple transmitters, c) performing an initial demodulation process on the received signals using the estimated channel responses to remove inter-symbol interference (ISI), and d) performing at least one subsequent demodulation process on the received signals. The subsequent demodulation process: i) removes co-channel interference (CoI) using the estimated channel responses and demodulated signals from an immediately preceding demodulation process to form interference cancelled signals and ii) removes ISI from the interference cancelled signals. In the initial and subsequent demodulation processes, ISI removal includes a time reversal combining process followed by a single-channel decision feedback equalization (DFE) process.
