New unambiguous acquisition algorithm for binary offset carrier modulated signal

被引：0
作者：
Hu, Hui [1 ]
Li, Lin [1 ]
Lei, Ming-Dong [1 ]
Lu, Chun [1 ]
机构：
[1] College of Information Engineering, East China Jiaotong University, Nanchang
来源：
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | 2014年 / 22卷 / 06期
关键词：
BOC modulation; Multi-peaks; Narrow correlation; Periodic extension; Separation reconstruction;
D O I：
10.13695/j.cnki.12-1222/o3.2014.06.012
中图分类号：
学科分类号：
摘要：
Binary offset carrier(BOC) modulation can effectively solve the mutual interference between navigation signals, and realize the effective use of spectrum resources. However, BOC signal's autocorrelation function has multiple positive and negative peaks within ±1chip, which leads to error acquisition and lost acquisition. To solve this problem, the periodic extension among the modulated rectangular pulses in each spread spectrum code chip are analyzed, and a base unit is determined to separate the BOC signals into a base unit and a combined unit which superimposed a series of periodic extended base units, and thus realize the separation of BOC signal's autocorrelation function. According to the symmetry, a low single correlation function is reconstructed, which can not only remove side peak, but also increase the value of center main peak by means of single peak multiplied with BOC single's autocorrelation function. The results show that the proposed method can remove side-peaks of BOCs(2,1), BOCs(3,2), and BOCc(2,1) signal, and therefore can be applied to any order of sine or cosine phase BOC signal acquisition. Moreover, it reserves BOC signal's the features of narrow correlation peak, and the width is 1/k chip. ©, 2014, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.
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页码：763 / 769
页数：6
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