I am working on the problem of the estimation of direction of arrival. In the picture，Time is the receving signal of array which is a 9x100 matrix and Vector is a 9x100 matrix representing the signal phase changing between antennas suppose to be. x is sparse representation of DOA and is a 180x1 variable means the 180 degress in space. The angle of arrival is the index of max value of s. Now i mixed 3 situations with various antenna distance with 0.5，1，2 and bulid a 9x100 Time matrix contianing three 3x100 matrixes. If i calculate these 3 matrixes seperately there results are close， for example ，the index of max value in x are 11，10，10 for a DOA of 10. But after i mix them into a 9x100 matrix the index of max value will change to 7. I’. confused about the result after mixed. Why the index is not in 10 or 11 but 7？
A problem about the different results from mixed matrixs
This is not an electrical engineering modeling forum. So I don’t think it is the right place to get assistance as to why solutions of various models come out as they do.
I just want to know if it is reasonable for a mixed matrix estimate a different result from other 3 results. Because I recognize the additional matrixes as more constrains so i think the result should be in the results from other small matrixes.
