GNSS (global navigation satellite system) receiver and intermediate frequency data processing method thereof

A technology of intermediate frequency data and processing method, which is applied in the field of receivers, can solve the problems of rising memory cost and power consumption, large amount of stored intermediate frequency signal data, etc., and achieve the effects of reducing cost and power consumption, increasing storage length, and reducing memory size

Active Publication Date: 2013-11-20
中微智创(北京)软件技术有限公司
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Problems solved by technology

The method of pre-storing IF data and then processing it quickly has many advantages, but due to the large amount of data stored in IF signals, a large memory is often required. For mobile devic

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  • GNSS (global navigation satellite system) receiver and intermediate frequency data processing method thereof
  • GNSS (global navigation satellite system) receiver and intermediate frequency data processing method thereof
  • GNSS (global navigation satellite system) receiver and intermediate frequency data processing method thereof

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0054] like image 3 as shown, image 3It is a schematic structural diagram of a GNSS receiver according to an embodiment of the present invention. The receiver is composed of an antenna 301, a radio frequency circuit 302, and a baseband circuit 303. The baseband circuit 303 is composed of an intermediate frequency data compression circuit 304, an intermediate frequency data storage circuit 305, a memory 306, and an intermediate frequency Data reading circuit 307, intermediate frequency data decompression circuit 308 and intermediate frequency digital signal processing circuit 107 constitute, wherein: antenna 301 is used to send the received GNSS satellite signal into radio frequency circuit 302; The signal is subjected ...

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Abstract

The invention discloses a GNSS receiver and an intermediate frequency data processing method thereof, and belongs to the technical filed of receivers for a GNSS. The GNSS receiver comprises five parts, namely, an intermediate frequency data compression part, an intermediate frequency data storage part, an intermediate frequency data reading part, an intermediate frequency data uncompression part and an intermediate frequency data processing part. A GNSS radio signal is required to be transmitted through the atmospheric layer, the strength of the signal reaching the ground is very weak; the GNSS receiver needs to process intermediate frequency data which are long enough, so that a satellite signal can be searched; and a method combing GNSS intermediate frequency data storage and parallel signal processing is adopted, so that the time for searching the satellite signal can be greatly reduced. However, intermediate frequency data can occupy lager storage circuits, and thus the application of the method in actual practice is restricted. According to the GNSS receiver and the intermediate frequency data processing method, the intermediate frequency data are compressed and uncompressed, so that the storage size of the intermediate frequency data can be decreased, and the cost and the energy consumption of the whole GNSS receiver are reduced.

Description

technical field [0001] The invention relates to the technical field of receivers of a Global Navigation Satellite System (GNSS), in particular to a GNSS receiver and an intermediate frequency data processing method thereof. Background technique [0002] Global Navigation Satellite System is a collective term for all global navigation satellite systems and their augmentation systems. It is an all-weather radio navigation system covering the whole world established by using all navigation satellites in the world. At present, GNSS includes GPS of the United States, GLONASS of Russia, COMPASS (BeiDou) of China, GALILEO system of the European Union, SBAS wide-area differential system, DORIS space-borne Doppler radio orbit determination system, QZSS quasi-zenith satellite system, GAGAN GPS Geostationary Satellite Augmentation System, etc., the number of available satellites reaches more than 100. The following is an introduction to the four main GNSS systems. [0003] 1.GPS syst...

Claims

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Application Information

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IPC IPC(8): G01S19/35G01S19/36
Inventor 李健陈杰
Owner 中微智创(北京)软件技术有限公司
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