Multistandard I/Q (In-Phase/Quadrature-Phase) carrier generating device based on fractional frequency-dividing frequency synthesizer

Abstract

The invention discloses a multistandard I / Q (In-Phase / Quadrature-Phase) carrier generating device based on a fractional frequency-dividing frequency synthesizer. The device comprises a three-order differential loop filter (10), a preset module (11), a full-differential quadrature voltage-controlled oscillator (12), a switch type bumper (13), a continuous two-dividing frequency divider module (14), a multimode frequency divider (15), a frequency and phase discriminator / charge pump (16), a nonvolatile memory (17) and a digital processor (18). By utilizing the invention, the frequency can continuously cover the range from 0.7GHz to 6GHz by reasonable frequency distribution, and the rapid frequency hopping is realized by presetting the frequency by the digital processor with strong function.

Description

technical field [0001] The present invention relates to the technical field of communication-based phase-locked loop frequency synthesizers, in particular to a multi-standard I / Q quadrature carrier generation device based on a fractional frequency division frequency synthesizer, which is a multi-standard I / Q quadrature carrier The generating device is based on a fractional frequency-division phase-locked loop frequency synthesizer, continuously covers a frequency range of 0.7GHz to 6GHz, and can meet all communication standards with a frequency lower than 6GHz. Background technique [0002] The phase-locked loop frequency synthesis device is a high-stability and high-precision frequency synthesis device, which is widely used in various fields of radio such as modern communication, radar, electronic countermeasures and modern instrumentation. Frequency generating devices based on phase-locked loop frequency synthesizers are widely used in various communication transceivers. ...

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the emergence of multi-mode systems, some people have proposed multi-carrier generation systems. However, these methods are basically based on several key frequency points for research, not continuous frequency coverage, and cannot be corrected by process deviations. Automatically compensates for frequency offset, reducing its stability

In addition, the switching speed between each frequency point is not fast enough, which will greatly affect the switching between communication system channels

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