A New Loran C Sky-Wave and Ground-Wave Identification Algorithm Based on IFFT Spectral Division
Zhu Yin-bing①②; Xu Jiang-ning①; Wang Hong-xing②; Cao Ke-jing①; Hu Dong-liang①
①Department of Navigation Engineering, Naval University of Engineering, Wuhan 430033, China; ②Department of Electronic Engineering, NAEI, Yantai 264001, China
Abstract：For present analog Loran C receiver, it is very complicated and takes a long time to complete cycle identification. Moreover, estimate error when arriving time of sky-wave and ground-wave is less than 50 under algorithms presented by some relative documents is intolerant. For estimating the arriving time of sky-wave and ground-wave exactly, a new algorithm for the detection is presented based on IFFT(Inverse Fast Fourier Transform) spectral division. After proving its feasibility, veracity of arriving time for sky-wave and ground-wave is simulated. The results show that using the new algorithm, veracity of arriving time for sky-wave and ground-wave can get up to 99.6% and no less than 98.6% respectively，and signal to noise ratio (SNR) can be improved 6dB relative to the standard of USCG.
朱银兵; 许江宁; 王红星; 曹可劲; 胡东亮. 基于IFFT频谱相除的罗兰C天地波识别新算法[J]. 电子与信息学报, 2009, 31(5): 1153-1156 .
Zhu Yin-bing①②; Xu Jiang-ning①; Wang Hong-xing②; Cao Ke-jing①; Hu Dong-liang①. A New Loran C Sky-Wave and Ground-Wave Identification Algorithm Based on IFFT Spectral Division. , 2009, 31(5): 1153-1156 .
2009, Vol. 31 
