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

An antenna array and antenna signal technology, applied in the field of deep space exploration, can solve problems such as complex algorithms and limited signal-to-noise ratio conditions, and achieve the effects of low estimation deviation, reduced calculation amount, and high estimation variance

Active Publication Date: 2014-05-21
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] Various details involved in the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention, rather than limiting it in any way.

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

[0055] exist figure 1 Among them, the deep space probe communicates with each antenna (1, 2...N) in the antenna array on the ground through its probe antenna, and performs operations such as data reception and pseudo-range measurement on the ground. Each antenna transmits data to the data processing equipment through the switch, and the detector signals received by each antenna are synthesized and then demodulated, which can greatly improve the data receiving ability of the signal. Similarly, the antennas in the array can also transmit uplink data to the detec...

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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 invention relates to the field of deep space exploration, in particular to a technology for calculating the phase difference of signals in deep space signal reception so as to synthesize antenna array signals. Background technique [0002] The rapid development of long-distance communication and navigation in deep space exploration and radio astronomy has put forward new requirements for the performance of radio telescopes. Due to the increase of development costs and technical limitations, 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, g...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/22H04L25/02H04B7/08
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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