Digital phase noise modem

Abstract

The invention discloses a digital phase noise modem, which comprises a field programmable gate array, a data memory, a digital-to-analog converter, an analog-to-digital converter and a digital signalprocessor. The problem of digital modulation of signal phase noise is solved. The problem of digital demodulation of signal phase noise is solved. Digital modulation and demodulation of signal phase noise are realized, a phase noise suppression problem can be converted into an application problem of the phase noise, and the purpose of accurate phase application of signal transmission, clock synchronization, phase synchronization, time synchronization and the like is realized.

Description

technical field

[0001] The application relates to the technical field of radio measurement and testing, in particular to a digital phase noise modem. Background technique

[0002] Phase noise is a kind of random phase fluctuation, which distorts the linear variation trend of the phase of the frequency source. In the frequency domain, it appears as the broadening of the signal spectrum, and in the time domain, it appears as the jitter of the signal waveform. Phase noise is an important performance parameter in radar, radio communication, navigation and positioning and other application fields. It has a significant impact on the performance of communication systems and weaponry, and often becomes a limiting factor in system performance. For example, in modern receivers, receiver sensitivity, signal selectivity, digital signal processing, etc. are all limited by phase noise, especially in complex electromagnetic environments, the phase noise of local oscillator signals directly...

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