Dual-mode positioning time-service type receiver for compass satellite and global positioning system (GPS) satellite
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A Beidou satellite and dual-mode positioning technology, applied in the field of satellite applications, can solve the problems of low safety reliability and poor autonomy
Active Publication Date: 2011-08-17
SHAANXI NAVI INFORMATION TECH
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At this stage, GPS positioning and timing functions are widely used in my country's transportation, electric power, communications, finance, water conservancy, petroleum and other fields; but because GPS is restricted by the United States, there are potential risks in using a single GPS, and its safety and reliability are low , poor autonomy
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Embodiment 1
[0013] Embodiment 1, reference figure 1 , a Beidou satellite and GPS satellite dual-mode positioning timing receiver, comprising:
[0015] The antenna module includes a Beidou receiving antenna for receiving Beidou satellite downlink signals; a Beidou transmitting antenna for transmitting signals to Beidou satellites in the sky; and a GPS receiving antenna for receiving GPS satellite downlink signals.
[0016] Since the two frequencies of the received signal are very different, it is difficult to realize it with one antenna, so we designed two receiving antennas. In terms of physical structure, we organically combined the three antennas.
[0017] The main technical indicators of Beidou / GPS integrated antenna are as follows:
[0018] 1) Beidou transmitting antenna:
[0019]
[0020] 2) Beidou receiving antenna:
[0021]
[0022] 3) GPS receiving antenna...
Embodiment 2
[0048] Such as figure 2 As shown, the Beidou baseband processing unit includes an A / D subunit, a down-conversion subunit, a Sin / Cos subunit, a correlation subunit, a code tracking subunit, a carrier tracking subunit, a signal power processing subunit, and a frame time scale Extraction subunit, Viterbi decoding subunit; the A / D subunit receives the 12.24MHz intermediate frequency signal output by the radio frequency channel module, and converts the intermediate frequency signal into a digital intermediate frequency signal; the down-conversion subunit receives the digital The intermediate frequency signal and the reappeared carrier signal, the digital intermediate frequency signal is carried out carrier stripping, and the sampling data of zero frequency in-phase (I) and quadrature phase (Q) are generated, and the reappeared carrier signal is generated by the carrier NCO Device) and Sin / Cos subunit generation;
[0049] Described correlation subunit comprises pseudo code correla...
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Abstract
The invention discloses a dual-mode positioning time-service type receiver for a compass satellite and a global positioning system (GPS) satellite. The receiver comprises an antenna module, a radio frequency channel module, a compass processing module, a GPS processing module and an expansion board module, wherein the antenna module comprises a compass receiving antenna, a compass transmitting antenna and a GPS receiving antenna; the compass receiving antenna is used for receiving a compass satellite downlink signal; a compass downlink radio frequency navigation signal is acquired by filtration of a filter and amplification of a compass low-noise amplifier; the compass transmitting antenna receives the signal which is transmitted by a compass power amplifier and transmits a signal to the compass satellite in the sky; and the GPS receiving antenna is used for receiving a GPS satellite downlink signal. The invention provides the receiver which receives the signals of the compass satellite and the GPS satellite simultaneously, so that functions of compass time service, compass positioning, GPS time service and GPS positioning can be realized, the receiver is independent of the GPS, and the safety and stability of civil basic industries of our country are improved.
Description
technical field [0001] The invention relates to the satellite application field, in particular to a Beidou satellite and GPS satellite dual-mode positioning and timing receiver. Background technique [0002] At present, the global navigation satellites mainly include GPS (Global Positioning System) of the United States, GLONASS (Global Navigation Satellite System) of Russia, Compass Navigation Satellite System of China and the Galileo Global Navigation and Positioning System (European Satellite Navigation System). At this stage, GPS positioning and timing functions are widely used in my country's transportation, electric power, communications, finance, water conservancy, petroleum and other fields; but because GPS is restricted by the United States, there are potential risks in using a single GPS, and its safety and reliability are low , poor autonomy. The Beidou satellite navigation and positioning system is a global satellite navigation system that is independently develo...
Claims
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