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Loran-C navigation signal simulation platform based on CPU and FPGA

A technology for simulating platforms and navigation signals, applied in simulators, instruments, control/regulation systems, etc., can solve the problems of inseparability of software and hardware functional modules, complex development, poor portability and maintainability, etc., and achieve good upgrade and expansion space. , the effect of fast upgrade speed

Active Publication Date: 2020-01-10
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of platform maximizes the performance advantages of the simulator, but the software and hardware functional modules cannot be separated, the upgrade and update are greatly affected by the hardware equipment, and even need to be redesigned and developed when performing a major upgrade, which makes this kind of simulator platform exist. Disadvantages such as complexity, long development cycle, and repeated capital investment
In addition, hardware architecture simulators generally have the disadvantages of poor portability and maintainability

Method used

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  • Loran-C navigation signal simulation platform based on CPU and FPGA
  • Loran-C navigation signal simulation platform based on CPU and FPGA
  • Loran-C navigation signal simulation platform based on CPU and FPGA

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Effect test

Embodiment

[0055] The specific implementation method of the Roland-C navigation signal simulation platform based on CPU+FPGA of the present invention includes the following 9 steps:

[0056] Step 1: Initial configuration

[0057] The parameter configuration unit configures the initialization parameters according to the user's choice, including the station chain simulated by the simulator, the user's initial working state, and the signal environment parameters.

[0058] Step 2: User status calculation

[0059] User status information includes real-time updating of user coordinates and movement information relative to each main and sub-station based on the user's movement model.

[0060] Step 3: Calculation of key parameters

[0061] The calculation of key parameters involves the core of the simulator, including signal coverage judgment, signal time difference, main and sub-station carrier signal frequency control parameters, signal power control parameters, signal environment control parameters, etc...

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Abstract

The invention discloses a Loran-C navigation signal simulation platform based on a CPU and an FPGA, which adopts a structure with the combination of software and hardware to complete data transmissionand communication between the CPU part and the FPGA part through a PCIE interface, wherein the CPU part is responsible for working mode selection, environment parameter setting, calculation of key parameters and data framing and issuing to the FPGA part, the FPGA part is used for analyzing the data and completing signal generation and combination, finally, digital-to-analog conversion is carriedout through DAC, and real-time generation of Loran C navigation analog signals is realized. Meanwhile, data continuous updating and signal real-time generation between the FPGA and the CPU are realized by designing an interrupt response mechanism. The invention has the advantages that the platform is portable, convenient to upgrade and low in price; the space is well upgraded and expanded, and thesystem upgrading speed is high; the system has time difference and positioning working modes, is good in signal time sequence control, and is suitable for development, debugging, maintenance, verification, training, function expansion development and the like of receiving and monitoring equipment of a Loran C navigation system.

Description

Technical field [0001] The invention belongs to the field of wireless communication, and relates to the calculation of key parameters of the Roland-C navigation signal simulation platform, data transmission, interrupt response and signal generation method, specifically a method based on CPU (Central Processing Unit, central processing unit) + FPGA (Field -Programmable Gate Array (Field Programmable Gate Array) Roland-C navigation signal simulation platform. Background technique [0002] "Long range navigation" is abbreviated as "Loran" and transliterated as Loran. The Roland-C navigation system is a land-based long-distance hyperbolic radio navigation system that uses the carrier receiver to receive the time difference of the transmitter signal to determine the user's location. It is the most important long-range navigation method for humans before the advent of satellite navigation technology. The emergence and development of satellite navigation technology once threatened the ...

Claims

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Application Information

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IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 路辉崔科李敏
Owner BEIHANG UNIV
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