MATLAB example not working.

Hi,

I am running code for plotting beam pattern by following webpage of MATLAB: https://in.mathworks.com/help/phased/examples/introduction-to-hybrid-beamforming.html

But MATLAB throws error:

"Undefined function 'scatteringchanmtx' for input arguments of type 'double'."

This code is provided by MATLAB team and still is not working. Your help will be highly appreciated. Code is provided below:

clc, clear all

Nt = 64;

NtRF = 4;

Nr = 16;

NrRF = 4;

rng(4096);

c = 3e8;

fc = 28e9;

lambda = c/fc;

txarray = phased.PartitionedArray(...

'Array',phased.URA([sqrt(Nt) sqrt(Nt)],lambda/2),...

'SubarraySelection',ones(NtRF,Nt),'SubarraySteering','None');

rxarray = phased.PartitionedArray(...

'Array',phased.URA([sqrt(Nr) sqrt(Nr)],lambda/2),...

'SubarraySelection',ones(NrRF,Nr),'SubarraySteering','None');

Ncl = 6;

Nray = 8;

Nscatter = Nray*Ncl;

angspread = 5;

% compute randomly placed scatterer clusters

txclang = [rand(1,Ncl)*120-60;rand(1,Ncl)*60-30];

rxclang = [rand(1,Ncl)*120-60;rand(1,Ncl)*60-30];

txang = zeros(2,Nscatter);

rxang = zeros(2,Nscatter);

% compute the rays within each cluster

for m = 1:Ncl

txang(:,(m-1)*Nray+(1:Nray)) = randn(2,Nray)*sqrt(angspread)+txclang(:,m);

rxang(:,(m-1)*Nray+(1:Nray)) = randn(2,Nray)*sqrt(angspread)+rxclang(:,m);

end

g = (randn(1,Nscatter)+1i*randn(1,Nscatter))/sqrt(Nscatter);

txpos = getElementPosition(txarray)/lambda;

rxpos = getElementPosition(rxarray)/lambda;

H = scatteringchanmtx(txpos,rxpos,txang,rxang,g);

F = diagbfweights(H);

F = F(1:NtRF,:);

pattern(txarray,fc,-90:90,-90:90,'Type','efield',...

'ElementWeights',F','PropagationSpeed',c);

[Voss]

Do you have the Phased Array System Toolbox installed?

[Qasim Sultan]

yes !

Answer 1

[Stephen23]

Typical reasons why that function might not work:

• scatteringchanmtx was introduced in R2017b. It will not work with earlier MATLAB versions. You did not tag the question with the MATLAB version you are using, but it helps us when you do.
• the toolbox is not installed (check using ver).
• the toolbox is not licensed (check https://www.mathworks.com/licensecenter).
• the Search path has been changed so the function cannot be found.