Design of frequency/time hopping system used in airborne data link

This paper presents a frequency/time hopping (FH/TH) system which is used in airborne data link. Taking FH/TH system can effectively solve the near-far problem, which reduces the data collision between users. This paper constructs a long cycle frequency/time hopping sequence by using the longest linear feedback shift register sequence (m sequence), which can meet the requirement of data privacy in airborne data link. It also save the hardware resources, improve the system speed though combine frequency hopping sequence and time hopping sequence in one algorithm.