DPCCRW: An Unambiguous Acquisition Technique for High-order Binary Offset Carrier Modulated Signal
Huang Xinming, Ou Gang, Zhu Xiangwei, Chen Lei, National Univ. of Defense Technology, China
Location: Grand Ballroom G
Binary offset carrier (BOC) modulation has been widely adopted in modern global navigation satellite system (GNSS) not only for its characteristic of spectrum-split, but also for its high measuring precision and good multipath mitigation ability. BOC modulation brings the ambiguity problem due to its multiple peak auto-correlation function (ACF). Especially for high-order BOC modulated signal, the ambiguity problem is more serious as its ACF is more complicated. In the paper, an unambiguous acquisition technique with side-peak cancelation method is proposed for high-order BOC modulated signals. By constructing a new local auxiliary signal, and with the help of the traditional Bump-Jump technique, the risk of false lock has been completely removed. Performance analysis results show that the proposed technique has a significant performance improvement compared with the existing methods.