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Signal phase difference estimation device and method in antenna aligning array based on circulating cross-correlation

An antenna array and signal phase technology, which is applied in the field of deep space exploration, can solve the problems of limited signal-to-noise ratio conditions and complex algorithms, and achieve the effects of reduced calculation amount, low estimation deviation, and strong anti-correlation interference.

Active Publication Date: 2011-02-09
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

This method can achieve carrier phase estimation in the case of low SNR to a certain extent, but the algorithm is too complicated, and the SNR condition is also limited to a certain extent

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  • Signal phase difference estimation device and method in antenna aligning array based on circulating cross-correlation
  • Signal phase difference estimation device and method in antenna aligning array based on circulating cross-correlation
  • Signal phase difference estimation device and method in antenna aligning array based on circulating cross-correlation

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Embodiment Construction

[0053] Hereinafter, various details involved in the technical solution of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not have any limiting effect on it.

[0054] figure 1 It is a schematic diagram of antenna array in deep space exploration.

[0055] in figure 1 , The deep space probe communicates with each antenna (1, 2...N) in the ground antenna array through its probe antenna, and performs operations such as data reception and pseudorange measurement on the ground. Each antenna transmits data to the data processing equipment through the switch, and the detector signal received by each antenna is synthesized before data demodulation, which can greatly improve the data receiving ability of the signal. Similarly, the antennas in the array can also simultaneously transmit uplink data to the detector. ...

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Abstract

The invention provides a signal phase difference estimation device in an antenna aligning array based on circulating cross-correlation, and the antenna aligning array comprises a plurality of receiving antenna units. The device is used for calculating the phase differences of antenna signals of the antenna aligning array in stable circulation, and comprises one or two matched filters, a circulating cross-correlation module and a phase difference resolving module, wherein the filter is used for matched filtering for the antenna signal which is subjected to time delay, amplitude weighting and phase adjustment, and matched filtering for a difference signal between the signal which is subjected to time delay, amplitude weighting and phase adjustment and a reference signal; the circulating cross-correlation module is used for calculating a circulating cross-correlation function of the signal and the difference signal which are both subjected to matched filtering; and the phase difference resolving module is used for calculating the phase difference of the antenna signal according to the circulating cross-correlation function. The invention also provides a signal phase difference estimating method in the antenna aligning array based on circulating cross-correlation, a signal synthesis device, a signal synthesizing method, an antenna aligning array signal receiving system and an antenna aligning array signal receiving method.

Description

Technical field [0001] The present invention relates to the field of deep-space detection, and particularly relates to a technique for calculating the phase difference of signals in deep-space signal reception to perform antenna array signal synthesis. Background technique [0002] The rapid development of long-distance communication and navigation and radio astronomy science in deep space exploration has put forward new requirements for the performance of radio telescopes. Due to the increase in development costs and technical limitations, the increase in the G / T value of a single antenna has come to a standstill. The US Deep Space Network (DSN) strategic plan has clarified the possible growth path: using radio frequency bands to obtain higher antenna gains through a large number of small antenna arrays. The advantage provided by the antenna array is that it can receive data at a higher data rate than that received by a single antenna. It has many desirable advantages: better p...

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Application Information

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IPC IPC(8): H04B7/08H04L27/22H04L25/02
Inventor 孔德庆张洪波苏彦朱新颖郑磊李俊铎李春来
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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