一种适用低成本导航芯片的BDS单频周跳探测方法

Cycle Slip method for a BDS Single Frequency Suit for Low-cost Navigation Chip

传统码-载波相位周跳探测方法应用于单频BDS导航需求时,易受码观测量噪声的影响而导致小周跳探测失效,无法适用"高端低用"的高精度大众导航需求,因此,提出一种简单易行的多普勒周跳探测法,实现对低成本导航芯片BDS单频数据周跳探测,并与双差法周跳探测方法进行了比较。结果表明,双差法在两颗星同时发生相同周跳的情况下,既无法识别周跳的发生,也无法定位发生周跳的卫星,使用多普勒法不仅适用于RTK双差周跳探测,还适用于PPP的非差、单差模式下的周跳探测,既能精确探测周跳和识别发生周跳的卫星,又能定量探测到小周跳的发生。

Aiming at the problem that the traditional code-carrier phase cycle detection method is applied to single frequency BDS navigation,which is not sensitive to small cycle slips and is susceptible to observation noise. High precision of 'high with low use'can’t be applied. Doppler detection cycle slip method is proposed for the low-cost navigation chip of BDS single frequency,which is compared with double difference method detection cycle slip. Experiments show that if cycle slip happened in two satellites at the same time,double difference not only can’t detect cycle slip,but also not assure which satellite takes cycle slip. Doppler method is not only applied to RTK double difference cycle slip detection,but also applicable to PPP nondifference and single-difference cycle slip detection. It can make sure the satellite where the cycle slip occurs and small cycle slip is detected.