How to generate HDL code for 2-D matrices
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I am working on HDL code gen project. I've designed an FFT algorithm , and trying to generate HDL code for that. But the algorithm consisting of matrix of inputs , twiddle factors and their multiplications which are of two dimensional matrices. HDL coder is unable to generate code for 2-D matrices.
What do I need to do to generate HDL code for my Algorithm.
Example: Use Cooley-Tukey Divide and Conquer Technique of FFT Computation.
R1(16,4) = x(16,4) * w4(4,4);
R2(16,4) = w16(4,4) .* R1(16,4);
Y(16,4) = R2(16,4) * w(4,4) ;
x= input; Y=output;w4w16,w4 are twiddle factors.
Tim McBrayer on 30 Jun 2014
You are correct that HDL Coder does not support matrix multiplication directly. You can always decompose the matrix multiplication to the scalar operations that it is comprised of, though.
The FFT is a commonly used algorithm within HDL Coder. Many of the shipping examples in the product documentation involve FFTs. It sounds like perhaps this is an academic project, and that you cannot simply use the shipping examples. Perhaps, however, you can gain some insight on how to perform the math that you need to from the examples provided.
FFT Using Simulink Blocks:
Using the Minimum Resource HDL FFT:
OFDM Receiver with 512-Point Serial FFT
OFDM Receiver with 512-Point Streaming I/O FFT
More Answers (1)
the cyclist on 28 Jun 2014
Is this what you mean?
Bvec = 1:9;
B = reshape(3,3);
A = B';
C = A*B;
If not, then my suggestion is the same as Azzi's. A simple example or two of the input/output you expect would be very helpful.