Frequency Spectrum Connection Method for High Time-Resolution Delay Profile Estimation in Digital Terrestrial Television Broadcasting

Abstract

In Japanese digital terrestrial television broadcasting (DTTB), the identification of multi-path is important to improve its reception characteristics. To enhance the resolution of the delay profile, connecting continuous multiple channels and the extended frequency bandwidth are effective. However, the guard band is existing between each channel and the transfer function is not obtained directly. The phases of each channel are not synchronized because the each channel is broadcasted independently. In this paper, a method to connect multiple channels is proposed. Interpolation of the guard band by using the liner adaptive predictor based on the RLS algorithm and compensation of phase between adjacent channels are performed. As a result, it is confirmed that resolution enhancement of the delay profile is possible. It is possible to improve the time resolution of the delay profile to below 0.024[μs].