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Measurement filter selection method applied to vector signal analysis

A vector signal and filter technology, applied in the field of optimal measurement filter selection, to achieve simple operation and solve the selection problem

Inactive Publication Date: 2019-07-23
PLA NO 63686 CORPS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a measurement filter selection method applied to vector signal analysis in view of the above-mentioned prior art, which can not only solve the problem that the shaping filter of the output device is known but the vector signal analyzer has no corresponding measurement filter. , and can solve the situation where the shaping filter of the vector signal output device is unknown

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  • Measurement filter selection method applied to vector signal analysis
  • Measurement filter selection method applied to vector signal analysis
  • Measurement filter selection method applied to vector signal analysis

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Embodiment

[0064] In order to verify the actual effect of using the traversal method to find the best measurement filter, two sets of experiments were carried out. A group of experiments is aimed at the filter type in the measuring instrument including the matched filter, which is used to test the probability of finding the matched filter by this method. The other group is for special equipment, where the filter type of the transmitter is unknown, and is used to compare the difference between the measurement results of the best measurement filter and other filters.

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Abstract

The invention relates to a measurement filter selection method applied to vector signal analysis. The method is based on a theoretical relationship between an error rate and a matching filter and between the error rate and an EVM, derives the mutual relation between the EVM and the matched filter under the same condition; a measurement filter with the highest EVM measurement accuracy is searched by using a traversal method, so that the problem that a forming filter of output equipment is known and a vector signal analyzer does not have a corresponding measurement filter can be solved, and theproblem that the forming filter of the vector signal output equipment is unknown can be solved. After the theoretical method is developed into general software, the selection problem of the measurement filter can be solved on site in real time, the operation is simple, no professional background is needed, and the method is suitable for engineering on-site measurement.

Description

technical field [0001] The invention relates to an optimal measurement filter selection method applied to vector signal analysis. It belongs to the technical field of instruments and meters. Background technique [0002] In a digital communication system, due to the filtering effect of the transmitter and the channel, there is intersymbol interference in the receiving sequence. The goal of the receiving filter is to recover the baseband pulse with the maximum signal-to-noise ratio under the premise of no intersymbol interference, which can realize this The best receiving filter for the target is called a matched filter or correlator. When performing vector signal measurement, the shaping filter of the vector signal output device must be matched with the measurement filter of the vector signal analyzer. If they do not match, it will cause the loss of signal energy and directly cause the measured vector parameters (such as error vector magnitude EVM) measurement error increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/336H04B17/382H04B17/309
CPCH04B17/309H04B17/336H04B17/382
Inventor 余清华沈小青丛波邱斌王天云夏伟
Owner PLA NO 63686 CORPS
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