Navigation signal high-speed radio frequency acquisition and playback device and method
A navigation signal and signal sampling technology, applied in the field of navigation, can solve the problems of high ADC rate, low ADC sampling rate, and inability to acquire signals at the same time, and achieve the effect of simple RF channel design, convenient storage space, and flexible expansion of storage space.
Inactive Publication Date: 2020-11-27
湖南跨线桥航天科技有限公司
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Problems solved by technology
[0004] At present, the GNSS acquisition and playback instrument mainly converts the radio frequency signal into an intermediate frequency and then collects it (such as figure 1 As shown), the down-conversion method is required, and the sampling rate of the ADC is low, and it is impossible to simultaneously collect GPS, Beidou, GLONASS, and Galileo signals in the same channel, and it is impossible to perform high-precision analysis and algorithm processing; RF acquisition and playback equipment, use ADC directly Collecting radio frequency signals, the ADC rate is higher than that of the intermediate frequency method. Currently, radio frequency collection and playback equipment (such as figure 2 Shown), mainly used in radar signal acquisition and playback, not yet used in the navigation field
High sampling rate RF direct acquisition brings a large amount of data transmission, and ordinary memory cannot meet the design requirements in terms of speed and capacity
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[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0040] refer to image 3 As shown, this embodiment discloses a navigation signal high-speed radio frequency acquisition and playback device, including: a signal sampling module 1, which is used to filter out non-navigation signal frequencies in the radio frequency signal and convert the filtered analog signal into a digital signal ; The data distribution module 2 is used to slice the sampled digital signals to form individual messages and distribute them in parallel through the optical port; the local storage and control module 3 is used to control the local storage of the message data sent by the data distribution module or external storage; the...
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The invention discloses a navigation signal high-speed radio frequency acquisition and playback device and method. The device comprises a signal sampling module used for filtering a non-navigation signal frequency in radio frequency signals and converting filtered analog signals into digital signals; a data distribution module used for slicing the sampled digital signals to form messages and distributing the messages in parallel through optical ports; a local storage and control module used for controlling the message data sent by the data distribution module to be stored locally or stored externally; a distributed storage module used for serving as external storage; a data processing module used for filtering the message data sent by the data distribution module; and a signal playback module used for converting the filtered digital signal into an analog signal and moving the analog signal to the frequency spectrum of a navigation signal. Data of all navigation frequency bands can be collected at the same time and analyzed, local oscillator signals and down-conversion are not needed, and the radio frequency channel design is simpler.
Description
technical field [0001] The present invention relates to the technical field of navigation, and more specifically, to a device and method for high-speed radio frequency acquisition and playback of navigation signals. Background technique [0002] Navigation signals have the characteristics of high carrier frequency, high real-time data, and large data volume. In actual research and development tests, it is often necessary to record navigation signals and play them repeatedly to facilitate fault reproduction and data analysis. [0003] The navigation signal acquisition and playback device is a device that collects and stores navigation radio frequency signals in real time to disk, and restores the stored data into navigation radio frequency signals. It can be used for testing and certification of various navigation products, research and development testing and troubleshooting, Signal analysis and algorithm research, etc. [0004] At present, the GNSS acquisition and playback...
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Login to View More IPC IPC(8): G01S19/37G01S19/24
CPCG01S19/243G01S19/37
Inventor鲁志勇张国柱仝海波赵鹏成葵交吴礼杰袁宏成刘柯呈苏畅
Owner湖南跨线桥航天科技有限公司