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IWR1642 frame-to-frame phase issues

I used the default parameters of mmwavestudio in the acquisition to measure a static target. When I want to extract its tiny deformation information, I need to convert it through his phase information. But I found that there is a phase transition between frames. This jump will affect the calculation of small deformations. How do I set parameters to narrow this phase change. As shown in the figure, there is a large difference between the last phase of the first frame of IWR1642 (75.1 °) and the initial phase of the second frame (74.2 °).

Chris Meng:

你好,

请问你使用1发1收来测试的么?

user6148823:

回复 Chris Meng:

Hello, I used one transmission and four receptions to measure, but the two frames of phase information I illustrated in the figure are from the same RX antenna.

user6148823:

回复 Chris Meng:

Data comes from dca1000 acquisition card

user6148823:

回复 Chris Meng:

Hello, I seem to know where my mistake is. I mistakenly thought that I only used 1TX, but actually used the second antenna. I saw the configuration as shown in the program (I would like to ask you whether this means that I use the 2TX configuration?). In addition, I provide the phase information of the first 4 frames of the same channel. See if there is a problem (I understand that if you use the 2TX configuration, I need to connect to see the phase of 1 frame and 3 frames instead of 1 frame The phase of 2 frames, do you think there is a mistake in my understanding?)

user6148823:

回复 Chris Meng:

See the file information in mmwavestudio as follows, can it represent the configuration of 2TX used in my measurement。

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