Chip level atomic clock based long code signal receiver processing method of navigation satellite

Abstract

The invention relates to a chip level atomic clock based long code signal receiver processing method of a navigation satellite, and belongs to data processing methods. The method comprises the steps that 1) a satellite signal is captured from one selected from cold-start, hot-start and unlocked relocation states; 2) the satellite signal is tracked by (2.1) a tracking loop equivalent noise bandwidth is reduced, a chip level atomic clock is used, errors are reduced and the precision is improved; and (2.2) coherent integration time of the tracking loop is prolonged, the chip level atomic clock isused, and the integration time is increased from 1ms to 1s; and 3) navigational positioning is carried out. The method has the advantages that the chip level atomic clock is used instead of a traditional crystal oscillator, as a temperature compensating or temperature-constant crystal oscillator in design of the satellite receiver, the chip level atomic clock is characterized by small size and low power consumption, and the chip level atomic clock can serve as the high-precision board-level clock for portable equipment.

Description

technical field [0001] The invention belongs to a data processing method, in particular to a processing method for a navigation satellite long code signal receiver based on a chip-level atomic clock. Background technique [0002] my country's "Beidou No. 2" satellite navigation system (BD2 for short) has been put into use, and the widespread application of BD2 satellite receivers in the domestic civilian market is the general trend. At the same time, because the pseudo-random codes of some frequency bands of the BD2 signal are designed as long codes and encrypted, this provides another high-precision navigation and positioning method for the military, which gets rid of the dependence on satellite navigation systems such as GPS and GLONASS, and realizes satellite navigation. The independence of the system improves the availability and reliability of the system in the battlefield environment. [0003] Because the military code signal of the BD2 satellite navigation system has...

AI Technical Summary

Problems solved by technology

Traditional atomic clocks such as hydrogen clocks, cesium clocks, and rubidium clocks have greatly limited their application range due to factors such as large volume, power consumption, and high price. The application form is a separate device or a component built into the device, and the application range is basically limited. On high-end devices or systems