Title :
A method for differentially coherent multichannel processing of acoustic OFDM signals
Author :
Aval, Yashar M. ; Stojanovic, Milica
Author_Institution :
Northeastern Univ., Boston, MA, USA
Abstract :
We propose a low complexity array processing method for differential detection of OFDM signals over underwater acoustic channels. Partial FFT technique, developed previously for mitigating inter-carrier interference in single-channel receivers operating over time-varying channels, is extended to multichannel configuration. Performance results based on simulation and experimental data demonstrate the advantage of the proposed method compared to conventional differential and coherent detection.
Keywords :
OFDM modulation; acoustic signal processing; intercarrier interference; interference suppression; signal detection; time-varying channels; underwater acoustic communication; acoustic OFDM signals; coherent detection; differential signal detection; differentially coherent multichannel processing; intercarrier interference mitigation; low complexity array processing; multichannel configuration; partial FFT technique; single-channel receivers; time varying channels; underwater acoustic channels; Acoustics; Arrays; Coherence; Demodulation; Doppler effect; OFDM; Receivers;
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop (SAM), 2012 IEEE 7th
Conference_Location :
Hoboken, NJ
Print_ISBN :
978-1-4673-1070-3
DOI :
10.1109/SAM.2012.6250565
