Research On Some Key Technologies Of The Smart Antenna Of The Ship-borne Communication System

Based on some project, some researches of the key technologies of the anti-interference system for the Ship-borne Intelligent Antenna Communication System are discussed in the thesis and it's hardware platform is realized too. Firstly the algorithms flow of the system and the entirety hardware platform structure are introduced in the thesis. Then the algorithms and hardware structure of Digital Down Convert, Digital Up Convert, Diversity-Polarization Combination and the extract of synchronizing signal are described in detail.To extract the synchronizing signal, the traditional method is based on the ASIC(Application Specific Integrated Circuit) together with the signal processing module. Based on FPGA and DSP, a new method using the ping-pong algorithm, is proposed to complete this function in the thesis. This method makes the system suite for other different coding style and improves the versatility of the synchronization module. Before synchronization, Digital beam-forming and Diversity-Polarization Combination are given to make the received signal more steady. All of the work is of great significance both in the designing and realization of the Intelligent Antenna Communication System.