Comnav Technology Ltd.

Other

Shanghai Astronomical Observatory, Chinese Academy

Yongquan Wang

Yang Gao

Liang Jie Xu

Hui Li

Jie Liu

Dong Li

He Zhao

Jianhua Zhou

Junping Chen

Qing Yin

Liduan Wang

Maorong Ge

Xingxing Li

Ruopu Liu

The present application provides a method for navigation and positioning of a receiver, including: receiving basic broadcast messages and correction parameters of a plurality of satellites, and establishing a pseudorange observation equation and a carrier-phase observation equation corresponding to each of satellites respectively; correcting the pseudorange observation equation and the carrier-phase observation equation using the received correction parameters to obtain the corrected pseudorange observation equation and the corrected carrier-phase observation equation; constructing a first observation according to the corrected pseudorange observation equation and the corrected carrier-phase observation equation; constructing a second observation according to the corrected pseudorange observation equation and the corrected carrier-phase observation equation; and jointly solving the obtained first observations and second observations of the plurality of satellites to obtain anoperation result of user positioning.

Method for navigation and positioning of receiver and receiver

Un-differential correction distributed processing system and method based on a receiver of a reference station, in which main calculation tasks of conventional centralized data processing are transferred to the receiver of the reference station. The receiver of the reference station executes tasks of the PPP calculation, the PPP un-differential ambiguity fixing and the un-differential correction product generating via data interaction with servers. The client generates a relevant virtual un-differential correction by visiting a reference station area code address server and achieves PPP-RTK calculation under area augmentation. Load of server is greatly reduced, and problem of overload on relevant servers is solved; meanwhile, there is no need for the client to arrange a machine room of servers that needs specially-assigned person on duty, thus reducing user's maintenance work on the servers and saving costs. The reference station and client are not required to upload geographic coordinates precisely, and confidentiality is better.

Un-differential correction distributed processing system and method based on receiver of reference station

The present invention provides an integrated navigation system and its positioning method, and it pertains to the technical field of satellite navigation. The integrated navigation system of the present invention comprises a GNSS resolving module, an integrated navigation filter and an auxiliary navigation module using a sensor, wherein the auxiliary navigation module outputs corresponding positioning and/or orientation measurements to the integrated navigation filter; the GNSS resolving module is able to output the floating point solution or single point solution; the integrated navigation system further comprises a smoothing filter provided corresponding to the GNSS resolving module, which is configured to perform a smooth filtering processing on the floating point solution or single point solution to obtain smooth floating point solution or smooth single point solution respectively; the integrated navigation filter is configured to perform integrated filtering on the received smooth floating point solution or smooth single point solution and the corresponding received positioning and/or orientation measurements to obtain the corresponding positioning and/or orientation variable error estimate and sensor error estimate. The integrated navigation system of the present invention has high positioning accuracy and low implementation cost.

Integrated navigation system and positioning method thereof

The present invention relates to a radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal. The radio frequency circuit structure comprises a channel dividing function module, a plurality of frequency converting function modules, a plurality of local oscillator signal modules, and a plurality of analog-to-digital convertor modules. The channel dividing function module is used for dividing a satellite signal of the global navigation satellite system received by an antenna into satellite signals in a plurality of channels. Each of the frequency converting function modules is used for performing frequency conversion on the satellite signals in the corresponding channels to form near zero-frequency signals. Each of the local oscillator signal module is used for generating a local oscillator signal and outputting the local oscillator signal to the frequency converting function module. By using the radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal, frequency conversion and follow-up signal processing can be performed on the satellite signals in each frequency band separately, the signal quality insured, a sufficient signal to noise ratio is provided for a baseband processing circuit, thereby providing a wider application range.

Radio frequency circuit structure for implementing function of converting GNSS satellite signal into baseband signal

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Shanghai, China

Yongquan Wang