Terrestrial Television-Reception in Fast Moving Cars by Means of Antenna-Diversity-Techniques

The present contribution is dedicated to the techniques being required for terrestrial television-reception in fast moving cars. The techniques to realize multi-antenna systems are described and examples of such systems for OEM-production are disclosed. In order to satisfy the condition of a stable picture also in a fast moving car a special technique for the selection of the receiving signal from the available antenna signals is necessary. Due to the limited bandwidth of the transmission path between the TV-station and the mobile station the picture RF-carrier signal and the audio RF-carrier signal must be subject to two different methods of diversity techniques both making use of the same set of broadband TV-antennas on the car.