Beidou-1 reception channel based on GPS radio frequency chip
A radio frequency chip and receiving channel technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of low integration, low cost, low power consumption, complex debugging process, high power consumption, etc., and achieve low cost , the effect of improving stability and reliability, and low power consumption
Inactive Publication Date: 2015-12-09
北京星地恒通信息科技有限公司
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[0003] The current Beidou-1 user terminal RF receiving channel is mostly designed with discrete links (such as patents with application numbers CN201010004132.9, 201010593638.2 and 201210310794.2), including a low-noise amplifier, at least two mixers, at least two These designs require many devices, complex debugging process, high power consumption, high cost, and there are mutual interference of multiple phase-locked loops and aliasing of multiple local oscillator signals, and the low integration level is difficult to meet the miniaturization of Beidou Development needs of low cost and low power consumption
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[0024] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] Such as image 3 Shown is a system block diagram of the receiving channel in the present invention, figure 1 System block diagram of the radio frequency receiving channel; figure 2 Output LO map for frequency synthesizer, from Figure 1 ~ Figure 3 It can be seen that a kind of Beidou No. 1 receiving channel based on GPS radio frequency chip proposed by the present invention includes: low noise amplifier, mixer, frequency synthesizer, first bandpass filter, GPS radio frequency chip and crystal oscillator;
[0026] The low noise amplifier receives the Beidou No. 1 radio frequency signal, amplifies the radio frequency signal and outputs it to the signal input end of the mixer, and the low noise amplifier includes a dielectric filter, a low noise amplifier, a secondary low noise amplifier and a second bandpass filter;
[0027] ...
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A Beidou-1 reception channel based on a GPS radio frequency chip comprises a low-noise amplifier, a mixer, a frequency synthesizer, a band pass filter, a GPS radio frequency chip and a crystal oscillator. The low-noise amplifier outputs a Beidou-1 radio frequency signal after amplifying the Beidou-1 radio frequency signal. A clock signal produced by the crystal oscillator is output to the frequency synthesizer and the GPS radio frequency chip. After frequency multiplication is conducted on the received clock signal by the frequency synthesizer, the clock signal is output to the mixer. Frequency mixing is performed on the radio frequency signal and the clock signal by the mixer. A digital intermediate frequency signal is output after the band pass filter filters and the GPS radio frequency chip processes the radio frequency signal and the clock signal. Through adoption of the reception channel, the number of radio frequency devices is reduced, the reliability of a radio frequency circuit is improved, the cost and the power consumption of the radio frequency circuit are reduced, and the requirements such as low power consumption, low cost and miniaturization of a radio frequency circuit of theBeidou-1 reception channel are met to the greatest extent.
Description
technical field [0001] The invention relates to a Beidou-1 receiving channel based on a GPS radio frequency chip, in particular to a Beidou-1 receiving channel based on a GPS radio frequency chip, and belongs to the field of circuit design of a radio frequency receiving channel of a satellite navigation system. Background technique [0002] China's Beidou Navigation Satellite System (BeiDou Navigation Satellite System) is a global satellite navigation system developed by China itself. It is the third mature satellite navigation system after American GPS and Russian GLONASS. The Beidou satellite navigation system consists of three parts: the space segment, the ground segment and the user segment. It can provide high-precision, high-reliability positioning, navigation, and timing services for all types of users around the world, all-weather, and has short message communication. It has initially possessed the capabilities of area navigation, positioning and timing. The Beidou...
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IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 王大全朱刚郭浩黄锟
Owner 北京星地恒通信息科技有限公司