Sequence Detection Algorithm Based on Local Error Correction in Differential Frequency Hopping System
Xiaoyan Ning, Peng Jin, Zhiguo Sun · 2021
Differential frequency hopping is an effective way to improve the data transmission rate in frequency hopping technology. The sequence detection algorithm at the receiver is the focus of differential frequency hopping research. Aiming at the shortcomings of the existing sequence detection and reception algorithms, this paper proposes an improved sequence detection and reception algorithm, which ensures that the minimum free distance and fan out coefficient do not increase, Through the correlation before and after the differential frequency hopping frequency set, the output results of the incoherent square law energy detector are locally pre corrected to reduce the probability of continuous decision error, improve the accuracy of decision frequency, and then improve the communication performance of the differential frequency hopping communication system. The algorithm is theoretically analyzed and verified by simulation. The simulation results show that the communication performance of the system is greatly improved compared with the conventional sequence detection algorithm.