Device and method for time delay and phase adjustment of antenna signal

Abstract

The invention discloses a device and method for time delay and phase adjustment of an antenna signal. The method comprises the steps that a time delay adjustment value and a phase adjustment value at the current moment are obtained according to a time delay estimated value and a phase difference estimated value at the current moment and a time delay adjustment value and a phase adjustment value at the previous moment; an integral-multiple time delay value and a fractional-multiple time delay value are obtained through calculation according to the time delay adjustment value at the current moment; the phase of a sampling clock signal is adjusted according to the fractional-multiple time delay value, so that the sampling clock signal processed through fractional-multiple time delay is obtained; sampling is carried out on the antenna signal through the sampling clock signal processed through fractional-multiple time delay, so that a digital antenna signal processed through fractional-multiple time delay is obtained; the digital antenna signal processed through fractional-multiple time delay is adjusted through the integral-multiple time delay value, so that a digital antenna signal processed through time delay adjustment is obtained; a signal for secondary frequency mixing is obtained through the phase difference estimated value, and the signal for secondary frequency mixing is used for carrying out secondary frequency mixing on the digital antenna signal processed through time delay adjustment, so that an antenna signal processed through time delay and phase difference adjustment is obtained.

Description

technical field [0001] The invention relates to the field of deep space exploration, in particular to a time delay and phase adjustment device and method for antenna signals. Background technique [0002] Long-distance communication in deep space exploration puts forward new demands on the performance of radio telescopes. Due to the improvement of development cost and the limitation of technology, the improvement of the G / T value of a single antenna has come to a standstill. The US Deep Space Network (DSN) strategic plan has identified a possible growth path: using radio frequency bands, and obtaining higher antenna gain through a large number of small antenna arrays. Antenna arrays offer the advantage of being able to receive data at a higher data rate than can be received with a single antenna, which has many desirable advantages: better performance, greater operational robustness, lower construction costs, better program flexibility and broader support for scientific re...

AI Technical Summary

Problems solved by technology

In the frequency domain adjustment, because the signal needs to be Fourier transformed first, and then the inverse Fourier transform is performed after the adjustment is completed, the calculation amount is large, and the processing accuracy of the signal will be affected due to the limitation of hardware conditions.

Images