Fast Frequency-hopping System Interference Suppression Algorithm Research

The Frequency-Hopping Communication, which is one of the most important spread spectrum communication systems, holds an excellent ability of anti-fading, anti-interfering and high security. It was ever used in military communication in 1970s, and has been becoming a key part research in the future electronic confrontation. As the development of communication technology, Frequency-Hopping Communication has also been used in civil mobile communication system, such as GSM, HomeRF, and Bluetooth etc.Fast Frequency-Hopping technology improve the anti-jamming performance of the system mainly through several frequecies hopping to send the same symbol, which use the balanced information of the several transmission slips in frequency and time domain. Obviously, it can reduce the bandwidth efficiency of the communication system by such method. With the continuous development of science and technology, digital signal processing capability has been greatly improved, and the rate of frequency-changing in Frequency-hopping system has been becoming faster and faster, which allows the system to use the relatively independence of the communication countermeasure information, and makes completion of the communication signal directly hostile interference suppression possible without loss of bandwidth efficiency. In the above context we bring forward the rejection algorithms of hostile multi-tone jamming in FFH in this paper.In chapter one, this paper introduces the development, theory and traits of Frequency-Hopping Communication, and present anti-jamming communication and typical jamming signals; chapter two describes the FFH system, rules of anti-jamming and transmiting traits in such syetem; chapter three studies the anti-jamming algorithms in Frequency-Hopping Communication, and brings forward two anti-jamming algorithms, statistical probability at the foundation of correlation time algorithm and differential anti-jamming algorithm; In chapter four, we associate channel coding with the mentioned two algorithms, and finish the simulation; At last, chapter five summarizes the work of the paper and discussed the future of rejection of jamming in Frequency-Hopping Communication.