Estimation of delay profile for measurement of direction of propagation in digital terrestrial television broadcasting

An improvement scheme for degradation of reception characteristics of the digital terrestrial television broadcasting (DTTB) is an important issue. The degradation is caused by multipath effects, thus an analyzing technique for the channel is significant. In this paper, an analyzing technique for the channel delay profile that is obtained from the pilot symbol from the received signal is proposed. The amplitude and the delay time of paths are estimated to minimize the square error between the replica signal and the channel obtained from the received signal. Moreover, accuracy of delay time is improved by using Newton method. In the proposed scheme, the hidden path by the larger path can be found and the impulse response can be contsracted.