A method for testing the relative phase of multi-tone signals

Abstract

The invention discloses a method for testing the relative phase of multi-tone signals, and relates to a method for testing the relative phase of multi-tone signals. A method for testing the relative phase of a multi-tone signal, which consists of two parts: building a test platform and solving the relative phase; its basic feature is that each single-tone component of the signal to be tested is successively compared with the same broadband signal or multiple broadband with the same spectrum information of the baseband For signal mixing, a sampling instrument is used to collect the mixed intermediate frequency components, and the relative phase of the signal to be measured is obtained by calculation. In the process of frequency down-conversion, the present invention uses a broadband signal as a frequency-mixing signal, and in the subsequent calculation process, uses a statistical average point of view to reduce calculation errors.

Description

technical field [0001] The invention designs a signal testing method, especially a testing method involving the relative phase of multi-tone signals. Background technique [0002] With the increasing demand of human beings for communication, communication technology is developing rapidly in the direction of multi-band and large data volume, and the instruments and methods for measuring communication systems have also made great progress. Multi-tone signals are often used in various communication systems. For example, the local oscillator signal of a compressed sensing receiver based on MWC architecture can be regarded as a multi-tone signal with a fixed frequency interval. However, measuring the relative phase of multi-tone signals has been perplexing researchers in related fields, and has become an important topic of related scientific research. [0003] At present, the main test methods for the relative phase of multi-tone signals include direct measurement with a spectru...

AI Technical Summary

Problems solved by technology

However, if the signal to be tested has too many multi-tone components and is distributed in a wide frequency band, it is not easy to generate a multi-tone local oscillator signal with a known relative phase, and it is difficult to down-convert each tone component of the signal to be tested to an intermediate frequency at the same time. while performing one-time simultaneous sampling calculations

[0004] The signal to be tested applicable to the test method of the relative phase of the multi-tone signal proposed by the present invention has the following characteristics: each monotone component is relatively stable, and its signal overall presents obvious periodicity, and the spectrum distribution of the multi-tone signal is relatively wide, and its There are relatively many monophonic components, which cannot be directly measured by the above measurement method

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