A digital carrier wave high-precision phase measurement method and device

Abstract

The invention provides a digital carrier high-precision phase measurement method, which comprises the following steps: a signal source generates two in-phase signals S1 and S2 through a power divider;S1 is used as a reference signal input to the P1 port of the signal processing module, in different frequency bands, the phase is calibrated to 0 by digital phase shifting in the signal processing module. After the S2 signal enters the input terminal of the equipment under test, it is connected with the P2 port of the signal processing module. The signal processing module generates two sets of related power results through signal autocorrelation operation and phase coherence algorithm, and transmits the same to the main control and phase measurement module for phase calculation through the serial port.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a digital carrier high-precision phase measurement method. Background technique [0002] The information transmission in communication is to modulate the effective signal onto the carrier, transmit it to the receiving end through the carrier, and then demodulate the effective signal. In the field of communication, there are many applications of this type of wireless communication, including ground mobile communication, satellite mobile communication, and the like. The design of any communication equipment, whether it is the design of the receiving end or the transmitting end, needs to consider the test of the carrier phase, and the phase test requires high precision. [0003] At present, phase measuring instruments are widely used in the market, among which the low-priced phase measuring instruments have relatively poor phase accuracy, while high-precision phase m...

AI Technical Summary

Problems solved by technology

[0003] At present, there are widely used phase detectors in the market, among which the low-cost phase detectors have relatively poor phase accuracy, while high-precision phase detectors such as vector network analyzers are very expensive.

[0004] No signal correlation method is used in the existing phase test equipment. This method has low hardware requirements and can greatly improve the signal-to-noise ratio and test accuracy.

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