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High-precision channel calibration method based on channel phase noise statistics

A phase noise and calibration method technology, applied in radio wave measurement systems, instruments, receiver monitoring, etc., to solve problems such as different phase noise characteristics

Active Publication Date: 2020-03-20
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

[0004] However, in the actual communication system, due to various reasons, the real phase noise characteristics are different from the independent Gaussian white noise characteristics

Method used

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  • High-precision channel calibration method based on channel phase noise statistics
  • High-precision channel calibration method based on channel phase noise statistics
  • High-precision channel calibration method based on channel phase noise statistics

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Embodiment Construction

[0030] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] In this embodiment, the high-precision channel calibration method based on channel phase noise statistics includes the following steps:

[0032] The first step: if Figure 4 As shown, for each antenna received signal x m (n) Weighted after down-conversion processing, the output expression after weighting of M array elements is recorded as:

[0033] Y(t)=W X (1)

[0034] Use MP × 1-dimensional vector X to represent the input data of each array after P time delays, namely:

[0035] x T =[x 1 (0)...x 1 (P+1),...,x M (0)...x M (P+1)] (2)

[0036] Then after the length of L data segments, the two-dimensional matrix corresponding to the input data becomes

[0037]

[0038] Define MP×1-dimensional vector W...

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Abstract

The invention discloses a high-precision channel calibration method based on channel phase noise statistics, and the method carries out the multi-time sampling for calculation, and can reflect the statistical characteristics better. Because the channel phase and the phase noise change along with the change of the temperature and the external interference, the calibration period is shortened as much as possible, preferably within 100 milliseconds. In a common channel phase calibration method, only phase noise is regarded as white Gaussian noise, statistical estimation is not accurately carriedout on the characteristics of the noise, loss of channel calibration precision is caused, and the defects are well overcome.

Description

technical field [0001] The invention belongs to the technical field of radio frequency channel calibration and relates to a high-precision channel calibration method based on channel phase noise statistics. Background technique [0002] In multi-channel angle measurement systems such as radar and phased array, it is difficult to achieve the same phase-frequency characteristics of each receiver; the signal is received by the array and reaches the receiver, such as figure 1 As shown, there will inevitably be inconsistencies in the phase characteristics of the received signals among the various receiving channels. The phase between the channels directly leads to angle measurement errors in the receiver. Therefore, the calibration accuracy of the channel phase directly affects the angle measurement accuracy of the whole system. [0003] At present, the commonly used RF channel calibration method mainly assumes that the mean value of the channel phase noise is zero and the vari...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/21G01S7/40
CPCH04B17/21G01S7/4021
Inventor 孙松斌
Owner TIANJIN JINHANG COMP TECH RES INST
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