Frequency hopping modulation method, device and system based on frequency hopping pattern frequency point index

Abstract

The invention relates to a frequency hopping modulation method, device and system based on a frequency hopping pattern frequency point index. The method comprises the following steps: coding each frequency hopping pattern frequency point in a frequency hopping period to obtain frequency hopping pattern coding data of each frequency hopping pattern frequency point, and activating the corresponding frequency hopping pattern frequency point in each frequency hopping period, and forming index communication transmission data to be sent by the frequency hopping pattern coding data corresponding to the activated frequency hopping pattern frequency points; obtaining corresponding index communication transmission data according to the frequency hopping pattern frequency points activated in each frequency hopping period in the received communication signal and the frequency hopping pattern coded data corresponding to the activated frequency hopping pattern frequency points. According to the method and the device, aiming at the characteristic that the reactive interference only aims at the current active frequency point to implement interference, the reactive symbol-level interference cannot interfere the communication signal through energy suppression, on the contrary, the active channel and other silent channels can be distinguished, and the bit error rate in the communication transmission process is reduced.

Description

technical field [0001] The present application relates to the technical field of frequency hopping communication, and in particular to a method, device and system for frequency hopping modulation based on a frequency point index of a frequency hopping pattern. Background technique [0002] Due to the openness of the wireless channel, the malicious sender can easily detect the frequency band used by the legitimate communication party, estimate the communication parameters, and then implement interference. Frequency hopping communication is a commonly used anti-jamming method. The legitimate sending and receiving parties make use of known frequency hopping patterns to continuously change the working frequency of the signal to avoid the influence of the jamming signal. Since the interfering party cannot obtain the frequency hopping pattern to predict the position of the working frequency point, when the hopping speed is fast enough, it is difficult for the interfering party to ...

AI Technical Summary

Problems solved by technology

Since the Packet Delivery Ratio (PDR) cannot be accurately determined in practical applications, it is very difficult to detect reactive interference

In addition, some studies have proposed to detect the existence of reactive interference by comparing the previous experience PDR with the current estimated PDR, according to whether the PDR is lower than the threshold. However, due to the complexity of actual channel conditions, it is still difficult to detect and counter reactive interference in this way. accomplish

Images