Some Results on Implementing Low-Complex ICI Cancellation for DVB-H

Abstract

A combination of receiver windowing and intercarrier interference (ICI) canceling is proposed for improving the Doppler frequency performance of a DVB-H receiver. The windowing reduces the ICI, and enables ICI cancellation of low complexity to give substantial improvements. Bounds for the possible improvements of ICI cancellation are presented and compared to results from both simulations and measurements on a DVB-H prototype. The found improvements obtained from windowing agree well with that predicted by theory, whereas the gain from ICI cancellation is considerably smaller. This is primarily due to non-ideal channel estimation, which also is discussed. Although the measured performance for ICI cancellation is far from that theoretically possible, the gain in what Doppler frequency can be handled is more than 40%.

Novel ICI suppressing receiver for high-mobility DVB-T2 reception with large FFT modes

“…ICI mitigation has been also considered for the first generation DVB standards [7] [8], and recently a novel approach has been proposed for DVB-T2 and DVB-NGH reception [9], where a pre-equalizer operating in sub-blocks of the received OFDM block was proposed in order to combat the timevariation of the channel caused by the Doppler frequency shift. The main drawback of this approach is that pilot carriers can not be used for channel estimation.…”

Novel pilot structures for BEM channel estimation and ICI compensation in high-mobility DVB

“…Regarding ICI suppression, many research works have been published for DVB-T [4], [6], [7], and for DVB-T2 with perfect channel knowledge [8]. Nevertheless, their efficiency in realistic DVB-T2 reception including channel estimation remains an open issue.…”

Analysis of ICI compensation for DVB-T2

“…ICI cancellation in relation to first generation DVB-T systems has been considered by others [2], [3], [4], but for our best knowledge this is the first time that an ICI compensation technique is applied and analyzed in the second generation terrestrial DVB especification.…”