Broadband high-dynamic radio-frequency direct quadrature modulation device

Abstract

The invention discloses a broadband high-dynamic radio-frequency direct quadrature modulation device and relates to a direct quadrature signal modulation device having a wide working band and a wide output dynamic scope and controlled by a program in the field of satellite navigation test. The broadband high-dynamic radio-frequency direct quadrature modulation device is mainly composed of a baseband signal input and control interface, a difference reconstruction filter, a direct quadrature modulation module, a local oscillator signal generating module, a communication and control module, a large-step damping module, a small-step damping module, a power supply terminal, a program burn interface, and the like. The broadband high-dynamic radio-frequency direct quadrature modulation device realizes the baseband quadrature signal direct quadrature modulation up-conversion with wide working band and wide output dynamic scope by adopting a high-performance broadband phase-locked loop technology and a large-and-small step combined damping control technology, has the characteristics of miniaturization, simple interface, convenience in debugging, perfect function, excellent performance, flexibility, controllability, and the like, and is especially suitable for a Beidou navigation system as a radio-frequency emission front-end of a multi-system navigation signal or navigation interference signal generating device.

Description

technical field [0001] The invention relates to a program-controlled direct orthogonal signal modulation device with wide operating frequency band and high output dynamic range in the field of satellite navigation testing. It is especially suitable for the Beidou satellite navigation system as the RF output front-end of multi-system satellite navigation signal or satellite navigation interference signal generation equipment. Background technique [0002] Various user machines or receiving terminals of the satellite navigation system rely on receiving satellite downlink navigation signals for positioning and navigation. Navigation signals are mainly distributed in the L frequency band, and have a variety of systems. The service signal level is very low, and it is extremely vulnerable to various intentional and unintentional interference. Typically, interfering signal levels vary over a high dynamic range. Therefore, all kinds of user machines or receiving terminals should h...

AI Technical Summary

Problems solved by technology

[0003] At home and abroad, navigation signal simulation sources and interference signal simulation sources for GPS systems, GLONASS systems, and Galileo systems are gradually on the market. , The interface is complex, and the working frequency band is narrow, the level dynamic range is small, it cannot be flexibly configured, and the equipment size is large

Unable to meet the needs of multi-channel, generalization and miniaturization of navigation signal sources

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