Receiver tracking device and receiver tracking realization method

Abstract

The invention discloses a receiver tracking device and a receiver tracking realization method. The method comprises steps: according to preset noise branch correlation parameters, the signal-to-noise ratio of a receiver tracking circuit is calculated; according to the signal-to-noise ratio acquired through calculation and a tracking threshold of the receiver tracking circuit, coherent integration time is determined; and the coherent integration time of an integral clearing unit of the receiver tracking circuit is adjusted to enable the receiver tracking circuit to carry out tracking according to the adjusted coherent integration time. According to the method of the invention, adjustment on the coherent integration time is carried out according to the signal-to-noise ratio acquired through calculation and the tracking threshold of the receiver tracking circuit, the problem that when fixed coherent integration time is adopted, the coherent integration time is improper to exist can be solved, adjustment on the coherent integration time under different signal strengths can be realized, and the receiver tracking efficiency is improved.

Description

technical field [0001] The invention relates to receiver tracking technology, in particular to a receiver tracking device and a method for realizing receiver tracking. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is playing an increasingly irreplaceable and important role in people's daily life, especially in the fields of navigation, timing, surveying and mapping, and so on. At present, global satellite navigation systems mainly include the GPS system of the United States, the Beidou (BD) system of China, the GLONASS (GLObal NAvigation Satellite System) of Russia, and the Galileo system of Europe. In China and the Asia-Pacific region, GPS and Beidou systems are widely used; while in Russia, GPS and GLONASS are widely used. Since the Galileo system is far from mature, formal services cannot be provided yet. [0003] As the core component of the global satellite navigation system, the main purpose of the navigat...

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Problems solved by technology

[0005] The method of setting the coherent integration time with a fixed value, in the case of a very strong signal, it is unnecessary to use the second method to set the coherent integration time, because only a short integration time of 1ms or 2ms is required, and a long integration time Time tracking cannot correct the changes of local Doppler frequency and code phase in time, which makes the tracking error larger, greatly affects the tracking accuracy, and makes the dynamic tolerance of the tracking loop very poor

In the case of weak signals, when using the first method to set the coherent integration time, the short coherent integration time makes it difficult for the receiver to track the signal; using the second method, it is not necessary to track with a short coherent integration time , the tracking of the receiver has no corresponding effect

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