Linear phase correction method with broadband configurable channel

Abstract

The invention discloses a linear phase correction method with a broadband configurable channel. After the data broadband and center frequency information observed and stored by a system is obtained, multi-component sinusoidal signals which evenly cover the frequency band are generated, and phase information of a digital system channel is provided. According to the linear phase correction method, any phase correction signal can be configured in real time, the frequency spectra of the phase correction signals are pure, and a phase can be conveniently calculated. According to the linear phase correction method, due to the fact that the frequency, in a base band, of the phase correction signals is in the frequency doubling relation, after frequency conversion is carried out on the same local oscillator, the phase relations of the phase correction signals are relatively fixed, linear phase characteristics of the channel are conveniently corrected, and the accurate channel delay time is obtained.

Description

technical field [0001] The invention relates to a design method of a wideband configurable linear phase correction signal generator, more specifically, a design method of a wideband configurable linear phase corrector used in a radio receiving system. Background technique [0002] Radio receiving systems In the field of communication and measurement, it is often necessary to know the phase-frequency characteristics of the signal channel. For example, in the astronomical radio observation mode, it is necessary to correct the channel delay error, that is, the phase characteristic of the channel. The correction signal is added at the front end of the receiver, and the amplitude and phase changes of the phase correction signal are extracted at the back end of the receiver to calculate the system delay of the channel, and then correct the observed delay value to obtain an accurate geometric delay value. [0003] When detecting the phase-frequency characteristics of the channel o...

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Problems solved by technology

This method has three problems in actual engineering: 1. The phase correction signal is not a standard point frequency signal, which affects the phase calculation accuracy; 2. The phase correction signal generated by the pulse sequence generator is fixed, and it can be observed in a narrow bandwidth. , it is possible that the data recording bandwidth cannot include multiple phase correction signals separated by 1MHz, so it cannot play the role of signal channel phase correction; 3. The high-speed harmonic energy of the pulse train generator is small, and the requirements for subsequent amplification are very high. and less efficient

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