Adaptive Frequency Hopping (AFH) technology is an interference avoidance and spectrum utilization optimization technology used in wireless communication systems. It avoids interference and improves communication quality and system performance by dynamically adjusting channel frequencies. Its core idea is to avoid interference and optimize spectrum utilization through frequency hopping.
Technology Core
1、Channel assessment
Channel quality monitoring: The wireless device regularly monitors the quality of the channel currently in use, including parameters such as signal strength, bit error rate, and signal-to-noise ratio.
Interference detection: Detects whether there are interference sources in the current channel, such as signals from other wireless devices, environmental noise, etc.
2、Frequency hopping
Frequency hopping sequence generation: Generate a frequency hopping sequence based on the channel assessment results to determine the next channel frequency to be used.
Frequency switching: The wireless device dynamically switches to a new channel frequency according to the frequency hopping sequence to avoid interference sources.
3、Adaptive adjustment
Real-time adjustment: Dynamically adjust the frequency hopping sequence according to the real-time monitored channel quality and interference conditions to optimize spectrum utilization and communication quality
Technical advantages
1、Interference avoidance
1) Dynamic adjustment: AFH technology dynamically adjusts channel frequency by real-time monitoring of channel quality and interference, avoids interference sources, and improves communication quality.
2) Multi-channel selection: AFH technology can jump between multiple channels, increasing the flexibility and effectiveness of interference avoidance.
2、Spectrum utilization optimization
1) Adaptive adjustment: AFH technology can select the best channel frequency according to the actual channel quality to improve spectrum utilization efficiency.
2) Spectrum sharing: AFH technology can optimize spectrum utilization, reduce interference between devices, and improve system performance in an environment where multiple devices coexist.
3、Communication reliability
1) Anti-interference ability: AFH technology enhances the anti-interference ability of wireless communication systems and improves communication reliability through frequency hopping.
2) Channel quality assurance: AFH technology ensures channel quality and improves communication stability by real-time monitoring and adjustment of channel frequency.
4、Implementation
Software
Channel quality monitoring algorithm: AFH technology requires an efficient channel quality monitoring algorithm to monitor channel quality and interference.
Frequency hopping sequence generation algorithm: AFH technology requires an intelligent frequency hopping sequence generation algorithm to generate the best frequency hopping sequence based on the actual channel quality and interference.
Hardware
RF module: AFH technology requires a high-performance RF module that supports multi-channel frequency hopping and real-time channel quality monitoring.
Processor: AFH technology requires a high-performance processor that supports real-time channel quality monitoring and frequency hopping sequence generation.
Adaptive frequency hopping (AFH) technology achieves interference avoidance and spectrum utilization optimization by dynamically adjusting channel frequency, and is widely used in Bluetooth communications, wireless LAN, industrial Internet of Things and other fields. Based on this technical advantage, Chengdu Yibite Electronic Technology Co., Ltd. has developed related modules and wireless data transmission radios, such as: E34-2G4H20D, E34-2G4H27D, E34-2G4H11S, E34-DTU (2G4H27), E34-DTU (2G4H27) and other related products. Its core solution is based on Nordic's nRF24L01 + high-performance RF chip, and the working frequency band is the globally unlicensed ISM 2.4GHz. The power size can be freely selected to fit the market application.