Tracking structure suitable for L6 signal

作     者：Wang Yiting Ba Xiaohui Liu Xueyong Yang Ying Li Jian Chen Jie Wang Yiting;Ba Xiaohui;Liu Xueyong;Yang Ying;Li Jian;Chen Jie

作者机构：System on Chip LabInstitute of Microelectronics of the Chinese Academy of SciencesBeijing 100029China College of Electronic and Electrical Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《The Journal of China Universities of Posts and Telecommunications》 (中国邮电高校学报（英文版）)

年 卷 期：2021年第28卷第4期

页      面：64-74页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

基　　金：supported by the National Key Research and Development Project(2019YFB2204200) 

主　　题：quasi-zenith satellite system L6 signal code shift keying modulation tracking algorithm 

摘      要：A tracking structure suitable for L6 signal of quasi-zenith satellite system(QZSS) was proposed in order to track the L6 signal without other frequency assistance. Moreover, the tracking structure does not change the receiver’s hardware structure. The main difference between the proposed and the traditional tracking structure lies in the generation of local codes of E,P and L branches. The method of local code generation is designed in a two-stage manner. The first stage is the generation of the P branch local code with fast fouriertransform(FFT). In the second stage, the local codes of the E and L branches are obtained with the code-chip interval. The tracking structure can track and decode L6 signal separately, and track code shift keying(CSK)modulated signal as well. The structure was verified using both simulation data, generated in different conditions, and actual data obtained from QZSS satellites respectively. The results show that the improved tracking loop is able to track L6 signal without other frequency assitance. Furthermore, the biterror ratio(BER) of L6 tracking algorithm is lower than that of L1C/A assist L6 algorithm, when the Doppler remains a constant and reed solomn(RS)encode are applied. To be more specific, with the proposed structure the BER decreased by 11.40%, 17.07%, 15.00%, 11.15%, 5.19% when carrier to noise ratio(CNR) is 36-40 dB·Hz.