Product calculation between two matrixes

Hey guys, this is probably very easy, but Im having troubles with it, thank you in advance.

I want to calculate a product of two matrixes (surv_matrix) and(X_QPSK).

surv_matrix is a matrix of 47979 x 400.

This is the final calculation I want:

Range_compression=surv_matrix.*conj(X_QPSK);

First I want to ask if that code multiplicates first column of surv_matrix with first column of X_QPSK, because thats what I need and not row by row. So I want this two matrixes multiplicated column by column.

But first i need to put X_QPSK in a matrix, because now its a vector of 47979 x 1. So I want to define this vector as a matrix, where all the columns have the same value of this vector. How can I do that? This means I want that X_QPSK is 47949 x 400, where all the 400 columns have the same value of this one column I have.

Thank you

Answer 1

[Torsten]

X_QPSK = repmat(X_QPSK,1,400);
Range_compression=surv_matrix.*conj(X_QPSK);

.* multiplies each element of surv_matrix with each element of conj(X_QPSK).

[Miguel Albuquerque]

thanks a lot :D