Application of array antenna for a high-speed ISDB-T reception

Array antenna is an attractive method to improve the performance of mobile communication. In our application targeted here, four antenna elements are set in an automobile to improve the reception quality of mobile ISDB-T receiver. With regard to the directional characteristics of each antenna, we propose and implement a joint Pre-FFT adaptive array antenna and Post-FFT space diversity combining (AAA-SDC) scheme for mobile ISDB-T receiver. Simulation results show that the AAA-SDC scheme drastically improves the performance of mobile ISDB-T receiver, especially in high-speed moving condition. The experimental results conducted in the field also confirm that the proposed AAA-SDC scheme successfully achieves an outstanding reception rate up to 100% while moving at the speed of 80 km/h in a highway.