In the domain of MIMO, when you have a channel matrix which is rectangular in nature. How will you compute the inverse of that matrix? I have heard of "Pseudo-inverse". However, I don't know how this method works.
One example of a pseudo inverse is the Moore-Penrose inverse: https://en.wikipedia.org/wiki/Moore–Penrose_inverse
If A is a M x K matrix with M>K, then then you create Ainv = (A^H A)^-1 A^H and Ainv*A = I where I is an K x K identity matrix. It all relies on that A^H A becomes a matrix with full rank which is only possible when K < M.
TRY USING MATLAB.
IN MATLAB YOU HAVE AN INVERSE COMMAND .
YOU CAN ALSO FIND OUT HOW MATLAB Does it .
MATLAB Is Very good IN METRIX.
Ziad Sobih Thanks for the recommendation. However, when someone asks this type of question during the interview then we should answer the method, not the MATLAB command.
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