Research On TD-LTE Aviation Wireless Broadband Signal Access Issues

In order to supply high speed aviation wireless network services, the network should supply free signal wireless broadband access in aviation altitude environment. Now, it could provide services under 120 km / h. In the high-speed mobile wireless broadband communications environment, it would meet a new signal access problems.When face high-speed environment, it need to consider antenna isolation, interference subcarriers and Frequency offset.Firstly, the paper gave access network model of civil aviation. Designed three kinds of access network model based on base station?satellite and HAPS, then gave suggestion about how to use.Secondly, the paper study problems about wireless broadband communication technology for the aviation isolation in communication systems. Used optimization hybrid algorithm to Calculate Isolation, which can get better result. The problem for the aviation cabin serious signal loss is also need to be solved. So the paper gave aircraft- ground return system that could solve the problem of signal loss.Finally, it solved the problem of Inter Channel Interference, weighted moving ICI suppression algorithm would overcome ICI to a greater extent. For existing aspects of the Doppler shift, common offset estimation algorithm based on the optimized algorithm ladder could be accurately played step ladder accurate optimization purposes According to the frequency offset. From another point of view and ideas, with Rake itself Doppler processing techniques, could be better overcome Doppler shift high-speed environment which can be supported by the simulation.