Design and performance analysis of a novel cognitive radio-based message-driven frequency hopping system

To enhance the spectral efficiency of conventional frequency hopping systems, Message-Driven Frequency Hopping (MDFH) technology has been proposed in recent years. This technique employs information sequences instead of pseudo-random sequences to select hopping frequencies, significantly improving modulation efficiency. However, this approach results in the receiver being unable to obtain the hopping pattern information, necessitating blind detection, which makes the system more susceptible to interference. This article aims to enhance the anti-interference capability of message-driven frequency hopping systems, integrating Cognitive Radio (CR) technology to propose a Cognitive-based Message-Driven Frequency Hopping Communication System (CR-MDFH). Initially, the system’s transmitter and receiver were improved by implementing a multihop mapping scheme based on frequency band division and an interference detection method based on deducting frequency-hopping bands, building on the foundation of traditional energy detection sensing technology. This enhancement has elevated the system’s frequency hopping pattern performance and reliability. Finally, through simulation, it is demonstrated that the proposed system exhibits excellent interference detection capabilities and superior anti-interference performance in scenarios with partial-band interference.