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Deep space receiving antenna array correlated weighting method and system

A technology for receiving antennas and antenna arrays is applied in the field of correlation weighting methods and systems for deep space receiving antenna arrays, and can solve problems such as phase drift and output instability.

Inactive Publication Date: 2011-04-06
PEKING UNIV
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  • Abstract
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Problems solved by technology

[0006] The currently popular optimal weight method in the world has better convergence performance and faster convergence speed (in most cases, it can converge within 10 iterations), but there will be a certain phase drift, resulting in unstable output

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  • Deep space receiving antenna array correlated weighting method and system
  • Deep space receiving antenna array correlated weighting method and system

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Embodiment 1

[0046] Consider a deep-space antenna array with N array elements, and the signal received by the i-th array element from the aircraft is sampled as x i , x=1, 2, . . . , N. Then the signal matrix received by the array element is X=[x1, x2, . . . , xn]. Of course, in the actual system, use x i (t) represents the signal received by the i-th antenna, then the signals received by each antenna from the target signal source are: x 1 (t),x 2 (t),...,x i (t),...,x N (t). Further, x i (t)=s i (t)+n i (t), where s i (t) is the signal of the spacecraft, that is, the desired signal, n i(t) is noise. Here, we simplify the signal sampling received by the i-th array element from the aircraft as x i , i=1, 2, . . . , N. The present invention comprises the steps:

[0047] 1. Initialize the weight vector w (0) =[1,1,...,1] N . After the weights are initialized, the array merge output is:

[0048] y = w ( 0 ...

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Abstract

The invention discloses a deep space receiving antenna array correlated weighting method and a deep space receiving antenna array correlated weighting system. A deep space antenna array has N array elements, and a signal received by the ith array element from an aircraft is sampled as xi, wherein i is equal to 1, 2, ..., N. The method comprises the following steps of: initializing a weight vector; calculating a reference signal of the ith array element during the kth iteration from K=0, wherein a factor for determining the reference signal comprises a variable loading coefficient, and the variable loading coefficient is determined by the number of sampling points; performing iterative computation on the updated weight vector, and executing the calculation of the reference signal again; and after array convergence, calculating, combining and outputting. Due to the flexible selection of a load coefficient mu value, the method and the system can be applied to different application occasions; and the method and the system have excellent performance in the aspects of convergence rate and steady-state output performance, improve calculated performance, reduce calculated complexity and have important function for improving the performance of a wave beam forming method in the deep space antenna array.

Description

technical field [0001] The present invention relates to the beamforming related technology in the downlink signal reception of the empty antenna array, and more specifically, relates to a deep space receiving antenna array related weighting method and system. Background technique [0002] Large-scale antenna array is the main structure adopted by the ground receiving system of deep space exploration. Through the array of multiple antennas, it can effectively receive signals from deep space detectors with low signal-to-noise ratio. [0003] Antenna array technology uses multiple antennas to receive signals. These signals from different antenna units are processed subsequently, and after phase and delay are adjusted, they are weighted and combined for output. After correlation combining processing, the signal-to-noise ratio (SNR) of the output signal is greatly improved compared with a single antenna, so the antenna array technology is very suitable for deep space communicati...

Claims

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Application Information

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IPC IPC(8): H04B7/02
Inventor 尚勇封晓弢李霞
Owner PEKING UNIV
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