Nulling method of closed-loop nulling antenna for suppressing different forms of interference

A zeroing antenna and zeroing technology, applied in the field of communications, can solve the problems of inability to capture and capture interference signals, failure of zeroing, instability, etc., to achieve improved functions and flexibility, good zero-depth performance and beam conformation characteristics, The effect of shortening the zero adjustment time

Active Publication Date: 2017-01-11
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

The closed-loop method does not have high requirements for channel amplitude and phase consistency, but the closed-loop method needs to detect the interference signal in real time to determine whether the interference is suppressed. When the interference signal changes rapidly with frequency, time or space (such as frequency sweep interference, flicker interference, When jumping interference), there will be situations where the interference signal cannot be captured or captured unstable, which will lead to zeroing failure. Therefore, obtaining a stable interference signal detection capability is the key to the closed-loop method

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  • Nulling method of closed-loop nulling antenna for suppressing different forms of interference
  • Nulling method of closed-loop nulling antenna for suppressing different forms of interference
  • Nulling method of closed-loop nulling antenna for suppressing different forms of interference

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] 1. Zeroing Antenna Composition

[0029] Such as figure 1 As shown, the nulling antenna includes: N radiating units 1, N input preselectors 2, N low-noise phase shift attenuation components 3, beam forming network 4, combining beam coupler 5, 1×N microwave switch matrix 6, sub-beam interference identification receiver 7, combined beam interference identification receiver 8, and zeroing controller 9, wherein the low-noise phase-shift attenuation component 3 includes a low-noise amplifier 10, sub-beam coupler 11, controllable attenuator 12, Control the phase shifter 13, where N is a positive integer.

[0030] 2. Working principle and working mode of zeroing antenna

[0031] The working principle of the zeroing antenna: the signal is received by N radiating units 1 and filtered by N input preselectors 2, and then e...

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Abstract

The invention provides a nulling method of a closed-loop nulling antenna for suppressing different forms of interference. By a power detection closed-loop nulling scheme, a processing method of collecting interference signals for multiple times and carrying out weighted average is provided to obtain stable interference detection power, so that the insensitive characteristic of a system on the forms of interference sources is achieved. Meanwhile, a diversity technology of an LMS nulling algorithm of coarse and fine step length combination and adaptive step length iteration and an adaptive screening nulling algorithm is provided in the nulling process to achieve effective suppression of different forms of interference sources of single-carrier interference, sweeping frequency interference, blinking interference, jump interference and the like, so that the nulling method has wide applicability and popularization and application value.

Description

technical field [0001] The invention belongs to the communication field, and relates to a control method of an intelligent antenna. Background technique [0002] The nulling antenna is a smart antenna used to suppress interference. It obtains the amplitude and phase of each radiating element excitation through a zeroing algorithm, and on this basis realizes the reconstruction of the antenna pattern, so that the reconstructed antenna direction The figure produces a zero point at the interference source, and then achieves the purpose of suppressing interference. [0003] Generally speaking, there are two zeroing methods for zeroing antennas: open-loop and closed-loop. in: [0004] Open-loop method: Firstly, the interference direction finding is performed on the position of the interference source, and then the zeroing weight is obtained through the zeroing algorithm according to the direction finding result, and the zeroing weight is injected into the phase shifter and atten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/26
CPCH01Q3/2611
Inventor 万继响张坚王旭东于飞卢少鹏孙树峰许宁
Owner XIAN INSTITUE OF SPACE RADIO TECH
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