A channel estimation scheme for Chinese DTTB system combating long echo and high doppler shift

A novel channel estimation scheme is presented to combat long echo and high Doppler shift for Chinese digital television terrestrial broadcasting (DTTB) system. With this method, fast fading channel with Doppler shift about 200Hz can be well equalized even when OdB echo at 31.8us exists with head length 420, other modes likes 595 and 945 are also supported. Simulation results are given under Chinese DTTB standard to demonstrate the performance of the algorithm. This method can also be adopted to cyclic padded (CP) or zero padded (ZP) OFDM systems and single carrier ones.