Signal source number calculation method capable of achieving self-adaptive signal source estimation

An adaptive estimation and calculation method technology, applied in the field of communication, can solve the problems of false reporting of noise sources, omission of weak and small signal sources, etc., and achieve the effect of ensuring accuracy

Inactive Publication Date: 2019-04-26
成都华日通讯技术股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings in the above-mentioned background technology, to provide a method for calculating the number of signal sources that can realize adaptive estimation of the number of signal sources, mainly to provide a method for deter

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  • Signal source number calculation method capable of achieving self-adaptive signal source estimation
  • Signal source number calculation method capable of achieving self-adaptive signal source estimation
  • Signal source number calculation method capable of achieving self-adaptive signal source estimation

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Embodiment

[0027] A method for calculating the number of signal sources capable of adaptively estimating the number of signal sources, specifically comprising the following steps:

[0028] Step 1: Collect antenna array data X by sampling the signal through the communication receiving device; specifically:

[0029] Collect the electromagnetic signal formed by the propagation of the changing electromagnetic field in space by a set of array antenna (nine-element uniform circular array antenna is adopted in this embodiment) and a set of receiver (nine-channel direction-finding receiver is adopted in this embodiment), And form antenna array data X.

[0030] After the acquisition, it specifically includes the following operations: the antenna sends the received electromagnetic signal to the receiver, and the receiver selects the required frequency components, suppresses or filters out unnecessary signals or noise and interference signals, and then sends the filtered signal After amplification...

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Abstract

The invention discloses a signal source number calculation method capable of achieving self-adaptive signal source estimation. The method includes the following steps that 1, communication receiving equipment is used for sampling a signal, and antenna array data X is collected; 2, a covariance matrix R is calculated through antenna array data X; 3, according to the covariance matrix R, the characteristic values of R are calculated, and the characteristic values are sorted from the largest to the smallest; 4, according to the characteristic values of a descending sort, an array function is constructed; 5, the array function is used for calculating the number N of the signal sources. According to the signal source number calculation method capable of achieving self-adaptive signal source estimation, a basis for determining the number of signal sources of the same frequency is provided for the direction finding technology of spatial spectrum estimation, and the problem is overcome that atraditional method of setting decision threshold can cause leakage of some weak and small signal sources or a false report of noise sources.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for calculating the number of signal sources capable of self-adaptively estimating the number of signal sources. Background technique [0002] Estimation of the number of same-frequency signal sources is a key issue in spatial spectrum estimation and direction-finding technology. Most spatial spectrum estimation algorithms need to know the number of same-frequency signal sources in advance, and then perform direction finding according to the number of sources. [0003] At present, in the direction-finding algorithm of spatial spectrum estimation in China, the method of giving a decision threshold is generally used to estimate the number of signal sources. For example, it is commonly used to set the judgment threshold based on noise energy, but because the electromagnetic environment in which the space signal is located is very complex, such as for mobile signal so...

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Application Information

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IPC IPC(8): G01S1/02
CPCG01S1/02
Inventor 陈曾莫景琦莫舸舸漆骐
Owner 成都华日通讯技术股份有限公司
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