Beidou Star Communication and Zhendian Technology apply for patents related to pseudorange gross error detection, including pseudorange gross error detection and data filtering positioning for the Beidou system

On March 28, news emerged that the National Intellectual Property Administration’s information shows that Beijing Beidou Xingtong Navigation Technology Co., Ltd. and Zhen Dian Technology (Beijing) Co., Ltd. have applied for a patent titled “Method for Detecting Pseudorange Gross Errors, Electronic Device, and Storage Medium.” The application publication number is CN121741785A, the application number is CN202610012981.4, the publication date is March 27, 2026, and the application date is January 6, 2026. The inventors are Xie Baofei, He Xiyang, Di Wu Asia, Mao Ya, and Gao Ce. The patent agency is Beijing Anxin Fangda Intellectual Property Agency Co., Ltd., with patent agents Wu Xiaoxia and Li Ruomu. The classification number is G01S19/37.

The patent abstract indicates a method for detecting pseudorange gross errors, electronic devices, and storage media. The method is applied to the Beidou satellite navigation positioning system, including: acquiring satellite observation data from the moving station and reference station, and determining the double difference pseudorange’s non-geometric and non-ionospheric combined observation values for multiple frequency point combinations of the satellite signal based on the satellite observation data; standardizing the residuals of the non-geometric and non-ionospheric combined observation values of the double difference pseudorange; applying the DBSCAN clustering algorithm with an adaptive neighborhood radius to perform gross error detection on the standardized residual values corresponding to the multiple frequency point combinations, identifying the gross error point satellite sets corresponding to each frequency point combination; and filtering the gross error points from the satellite observation data based on the gross error point satellite sets corresponding to the multiple frequency point combinations. The solution provided by the embodiment of this application can effectively identify gross error points and filter observation data to retain observation data that meets pseudorange quality requirements, laying a data foundation for subsequent precise positioning.

Beidou Xingtong was established on September 25, 2000, and listed on the Shenzhen Stock Exchange on August 13, 2007, with its registered and office address in Beijing. The company is the first publicly listed company in China’s satellite navigation industry, with core businesses covering chips, navigation products, etc., and has the capability of full industry chain service.

Beidou Xingtong’s main business includes chips and data services, navigation products, ceramic components, and automotive electronics, falling under the Shenwan industry classification of National Defense Industry - Military Electronics II - Military Electronics III, involving concepts such as vehicle concepts, shared economy, and the Internet of Things.

In 2025, Beidou Xingtong achieved operating revenue of 2.213 billion yuan, ranking 4th among 9 companies in the industry, while the industry leader, China Aviation Optics, reported 21.386 billion yuan, the second place, Haige Communication, reported 4.388 billion yuan, the industry average was 3.827 billion yuan, and the median was 1.794 billion yuan. In its main business, product sales accounted for 94.36% at 2.088 billion yuan, service revenue accounted for 3.69% at 81.745 million yuan, and system applications accounted for 1.94% at 42.9746 million yuan. Regarding net profit, in 2025, there was a loss of 282 million yuan, ranking 8th in the industry. The industry leader, China Aviation Optics, reported 2.35 billion yuan, the second place, Hongming Electronics, reported 461 million yuan, the industry average was 215 million yuan, and the median was 30.356 million yuan.

The recent patent situation of Beijing Beidou Xingtong Navigation Technology Co., Ltd. is as follows:

According to Tianyancha data, Zhen Dian Technology (Beijing) Co., Ltd. was established on September 25, 2020, with legal representative Zhou Guangyu. The industry it belongs to is technology promotion and application service, and it has a small-sized enterprise scale, with a registered capital of 261.016481 million yuan and a paid-in capital of 223.744231 million yuan. The registered address is Room 120, 1st Floor, Building 1, No. 7 Fengxian East Road, Haidian District, Beijing. Zhen Dian Technology (Beijing) Co., Ltd. has invested in 0 other enterprises, participated in 0 bidding projects, and has 92 trademark information and 51 patent information in terms of property clues, along with 4 administrative licenses.

The recent patent situation of Zhen Dian Technology (Beijing) Co., Ltd. is as follows: