Networking

Partial FFT Demodulation: A Detection Method for Highly Doppler Distorted OFDM Systems

Date Added: Nov 2012
Format: PDF

Employing Orthogonal Frequency Division Multiplexing (OFDM) signaling over time-varying channels results in Inter-Carrier Interference (ICI) and degraded detection error probability due to the loss of orthogonality among the subcarriers. This problem is particularly exacerbated for systems operating in highly mobile scenarios such as UnderWater Acoustic (UWA) communications, Digital Video Broadcasting (DVB) for mobile devices and Vehicle-To-Vehicle (V2V) networks. To address the problem of data detection in such scenarios, the authors propose a novel demodulation strategy using several partial interval Fast Fourier Transforms (FFTs) instead of a conventional, single full interval FFT.