Loran C signal generator
A signal generator and signal technology, applied in the direction of instruments, satellite radio beacon positioning systems, measuring devices, etc., can solve the problems of R&D and testing of timing receivers that cannot meet the requirements of Roland C system construction
Pending Publication Date: 2021-11-23
西安空天电子技术有限公司
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Problems solved by technology
[0006] Therefore, the purpose of this invention is to provide a kind of Roland C signal generator, has realized adopting FPGA technology and high-speed D / A conversion to realize circuit and principle design to Roland C signal generator equipment by modularized design, can solve above-mentioned proposal Problems that cannot meet the needs of the newly modified Roland C system construction and the development and testing of Roland C navigation and timing receivers
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Embodiment Construction
[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.
[0029] The present invention provides a Loran-C signal generator, which has the advantages of enabling the Loran-C signal generator to have the ability to broadcast Loran-C signals that generate random noise interference, and can accurately control the strength and noise of the transmitted signal. Please refer to Figure 1-2 , including a central processing unit 1, a rubidium clock 2, a Loran-C timer 3, a pulse control module 4, a Loran-C generation module 5, a data encoding modulation module 6, a noise generation module 7, a signal synthesis matched filter 8 and a signal output 9;
[0030] Further, the central processing unit 1 is connected to the upper computer 11, and the central processing unit 1 includes the upper computer 11, a keyb...
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The invention belongs to the technical field of Loran C, and particularly relates to a Loran C signal generator, which comprises a central processing unit, wherein the central processing unit is connected with a Loran C timer, a pulse control module, a Loran C generation module, a data coding modulation module and a noise generation module, wherein the Loran C timer receives a 10 MHz frequency standard signal and a 1 PPS signal of a rubidium clock, the Loran C timer generates a basic timing signal of the Loran C signal generator and realizes a modulation control function, and the pulse control module is mainly used for determining a phase code of a Loran C signal and controlling an Eurofix modulation quantity. The Loran C signal generator has the Loran C signal transmission capability for generating random noise interference, can precisely control the intensity and noise of the transmitted signal, and provides a simulated excitation signal for the development and debugging of a Loran C receiver.
Description
technical field [0001] The invention relates to the technical field of Loran-C, in particular to a Loran-C signal generator. Background technique [0002] Roland C is a long-range hyperbolic navigation system improved and put into use based on the successful development of Roland A in the middle of World War II in the late 1950s. It was opened to civilian use in 1974; the ground launch system of Roland C is composed of at least 3 The chain of transmitting stations is precisely synchronized with each other; when the user receives signals from two stations, as long as they measure their arrival time difference, they know that they are on a hyperbola with these two stations as the focus; at the same time, they measure The time difference between the signals of the other two stations shows that they are on another hyperbola; obviously, the user must be at the intersection of these two hyperbolas, so that the location of the user can be determined; from 1945 to 1974, Roland only ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01S19/23
CPCG01S19/23G01S19/235
Inventor 海波王玉荣林玉琼杨大峰郑宫明
Owner 西安空天电子技术有限公司