Half-cycle jumping measuring method and device for satellite navigation

Abstract

The invention discloses a half-cycle jumping measuring method and a device for satellite navigation. The half-cycle jumping measuring method comprises the following steps: judging whether the current telegraph-text sign bit is same as the previous frame telegraph-text sign bit, and if so, carrying out half-cycle jumping correction; if not, and judging whether the accumulated value of the final M integrals of the current telegraph-text sign is the same sign, and if so, judging whether the current telegraph-text sign bit and the accumulated value of the final M integrals are the same sign, and if so, judging the the current telegraph-text sign bit has no carrier phase half-cycle jumping, and if not, carrying out half-cycle jumping correction. The half-cycle jumping measuring method and the device for satellite navigation have no need to read the phase information of each pseudo code width and the initial and ending phase information of each data bit, and only need to read the discontinuous coherent integration data and the phase information of each data bit so that the position of the half-cycle jumping is accurately judged and corrected. The half-cycle jumping measuring method and the device for satellite navigation has the advantages of simple method and accurate calculation, and facilitate to the achievement of a hardware receiver.

Description

technical field [0001] The invention relates to a high-precision satellite navigation receiver, in particular to a satellite navigation half-cycle jump detection method and device. Background technique [0002] The phenomenon that the carrier ring loses lock for a short time and causes the error of the whole cycle count is called a cycle slip. The reasons for the cycle slip can be divided into two categories: the change of the received signal and the failure of the receiver. Received signal changes mainly include satellite signal interruption, received signal power reduction, multipath signal impact, etc.; receiver failure may also cause cycle slips, such as crystal oscillator instability, unreasonable loop parameter settings, etc. In addition, cycle slips may also occur when the receiver is disturbed by external signals. For satellite navigation receivers, the carrier phase integer ambiguity estimation method can be used, whose estimation accuracy is much higher than that ...

AI Technical Summary

Problems solved by technology

For satellite navigation receivers, it is more complex to read the phase information of each pseudocode (1ms) width

Images