Coherent versus differential mobile OFDM with application to DVB-H

Abstract

Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H), which is required to operate under high mobility conditions resulting in significant Inter-carrier Interference (ICI). To mitigate ICI, several cancellation schemes have been proposed but they require reliable channel information at the receiver which is quite challenging and costly under high mobility. To overcome these challenges, we investigate non-coherent detection as an alternative for the DVB-H system, and combine it with different ICI mitigating techniques that do not require channel information. Our simulation results show that the proposed non-coherent environment schemes outperform the coherent schemes in typical DVB-H scenarios.