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Signal structure integrating navigation and communication

A technology of signal structure and navigation information, applied in the field of satellite communication, satellite navigation and satellite navigation, can solve the problem of power spectral density reduction, etc., and achieve the effect of good performance, good anti-interference performance and multiple functions

Inactive Publication Date: 2010-11-17
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

In this way, the power spectral density is greatly reduced

Method used

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  • Signal structure integrating navigation and communication
  • Signal structure integrating navigation and communication
  • Signal structure integrating navigation and communication

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Embodiment Construction

[0022] A navigation and communication integrated signal structure of the present invention is composed of message, spread spectrum code and carrier wave. The message includes the communication message to be transmitted, the satellite orbit position, time, coordinates and other related navigation information required for positioning, and the relevant parameters of the error correction model. Spread spectrum codes use m-sequence codes, chaotic sequence codes or other pseudo-random codes. These selected pseudo-random codes should have good autocorrelation and cross-correlation characteristics, can be used by multiple users, and should have good acquisition and tracking characteristics. , not only can play the role of spread spectrum, but also can be used as a ranging code to realize the precise measurement of the pseudo-range and carrier phase between the transmitting end and the receiving end. Carriers can be selected from VHF, UHF, L, S, C, Ku, Ka and other frequency bands, but...

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Abstract

The invention relates to a signal structure integrating navigation and communication, which comprises messages, spreading codes, carrier waves and the like, wherein the messages comprise communication messages to be transmitted, navigation messages for positioning satellite track, time, coordinates and the like required, parameters relevant to an error correction model, and the like. The spreading codes comprise an m sequence code, a chaos sequence code or other pseudo-random codes, wherein the pseudo-random codes have favorable auto-correlation property and cross-correlation property to be available for a plurality of users, and also have favorable acquisition property, traceability and the like; the pseudo-random codes not only have the function of spectrum spread, but also can be used as ranging codes to realize precision measurement of a pseudo range between a sending end and a receiving end and phases of the carrier waves. The carrier waves can be selected from frequency ranges of VHF, UHF, L, S, C, Ku, Ka, and the like, preferably C, S and L according to the traditional satellite resources. The signal structure can be applied to the fields with requirements for navigation positioning and communication transmission, and has multiple functions, good properties and good anti-interference performance.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to the fields of satellite communication and satellite navigation in radio information technology. Background technique [0002] Since the late last century, navigation technology, especially satellite navigation technology, has developed rapidly. Among them, the success and wide application of GPS, the US global satellite positioning system, has aroused great concern from the society. In addition to GPS, there are the global satellite navigation system GLONASS built by the former Soviet Union, China's Beidou positioning system (COMPASS), and the Chinese regional positioning system CAPS. In the satellite navigation system, the signal adopts the pseudo-code spread spectrum system. Among them, the spread spectrum code is the ranging code, and relevant parameters such as time scale, orbital parameters and various error corrections are provided in the navigation message. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04L27/26H04B1/707
Inventor 施浒立崔君霞韩延本裴军杜晓辉胡正群纪元法王萌朱海龙
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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