i want to know if a image can be made with the magnitude data of an FMCW radar?

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silvia cano 2024-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/2091396-i-want-to-know-if-a-image-can-be-made-with-the-magnitude-data-of-an-fmcw-radar

评论： Walter Roberson 2024-3-8

i have a graph with the magnitude (db ) and number of samples , this graph can be used to generate a image or i need to make more data processiong before trying to make a image

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Answer 1

Walter Roberson 2024-3-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2091396-i-want-to-know-if-a-image-can-be-made-with-the-magnitude-data-of-an-fmcw-radar#answer_1422141

在 MATLAB Online 中打开

imagesc(X_data, Y_data, Magnitude_data)

or just

imagesc(Magnitude_data)

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Walter Roberson 2024-3-7

You can skip saving the magnitude data to a file.

Note: The X_data and Y_data is used to position the image. Only the first element and the last element of X_data and Y_data are paid attention to.

X_data and Y_data name the positions of the centres of the lower-left and upper right pixels, not the edges.

Walter Roberson 2024-3-8

When you imagesc() providing just the data matrix, then the image is displayed with the center of the lower left element being at (1,1) and with element (J,K) being displayed with its center at (J,K) (so, increasing by one data unit on the axes for each additional element.)

When you imagesc() passing in x data and y data, then the image is displayed with the center of the lower left element being at (xdata(1), ydata(1)) and with the center of the upper right element being at (xdata(end), ydata(end)) and with everything else distributed equally between those data units.

If the image is the only thing on the axes, then the only difference it makes is on the labels of the axes. You are probably going to want one of the axes labeled by frequency, possibly in megahertz .

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