L-band uplink injection transmission signal generation device
A technology for transmitting signals and generating devices, which is applied in the direction of measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve the problems of discontinuous frequency at the time of adjustment, large hardware board area, and limited adjustment accuracy, etc. Strong scalability, good versatility, and high flexibility
Active Publication Date: 2019-02-19
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] With the development of satellite technology applications, the accuracy requirements for navigation receivers are getting higher and higher. Therefore, the requirements for navigation signal transmitters are also getting higher and higher. It is not only necessary to generate navigation signals similar to satellites, but also to be able to simulate satellites. The relative motion and the error caused by the multipath effect generate high-precision dynamic signals to test the dynamic capture and tracking performance and accuracy of the navigation receiver. The traditional method is to use the DDS integrated chip to calculate the Doppelganger through the given simulation data. Le offset, to update the frequency control word and phase control word of the external DDS according to a certain interval, the adjustment accuracy is limited by the parameters of the DDS integrated chip, and may cause discontinuous frequency at the time of adjustment, large jumps, occupying the hardware board The card area is also larger
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] Combine below figure 1 and figure 2 The present invention is further described.
[0031] L-band uplink injection transmission signal generation device, including monitoring computer, network transmission module, DSP processor, FPGA, D / A conversion module, radio frequency modulation module and filter, FPGA outputs reset signal to DSP processor, FPGA includes data management module , message storage module, spread spectrum code generation module, control word storage module, time-frequency signal generation module, message encoding and verification module, spread spectrum modulation module, digital control oscillator, quadrature modulation module and signal switching module;
[0032]The monitoring computer is used to generate various instructions, and outputs each instruction to the DSP processor through the network transmission module and the data management module; the monitoring computer is also used to receive the status information sent by the DSP processor through...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an L frequency band uplink injection transmitting signal generating device, which relates to a satellite navigation system. It is mainly composed of monitoring computer, network transmission module, DSP processor, FPGA, D / A conversion module, radio frequency modulation module and filter. The present invention mainly adopts the form of FPGA+DSP embedded program module to realize real-time operation and output of high-speed digital broadband signal, and outputs analog differential quadrature signal through high-speed D / A conversion setting, and the radio frequency modulation module performs direct quadrature up-conversion, and adopts numerical control method Setting the radio frequency output frequency point has high flexibility, and then the high-quality radio frequency signal can be output through the filter; the invention has the advantages of simple hardware structure, high integration, good versatility, high flexibility and program scalability, etc. Widely used and verified in navigation systems, especially suitable for broadband, high-precision L-band uplink injection and emission signal generation equipment in satellite navigation systems.
Description
technical field [0001] The invention relates to a broadband signal generation device in the field of satellite navigation, and is particularly suitable for real-time generation of high-precision L-band uplink injection and transmission signals in the Beidou satellite navigation system. Background technique [0002] In the navigation system, the L-band uplink injection transmission signal mainly injects navigation text and management data into the satellite, and uses the uplink injection transmission signal to complete the precise distance measurement between the satellite and the ground and guide the satellite platform time, providing guarantee for satellite navigation service, platform management and satellite orbit determination , while ensuring that the time system of the satellite platform is stable and reliable. The Beidou global satellite navigation system puts forward higher performance requirements for the reliability of data transmission, ranging accuracy, time guid...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/24
CPCG01S19/24
Inventor 罗立成李刚王跃余凡戴群雄
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP