partb.m

The angles in degrees of the two spatially propagating signals Compute the array response vectors o

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% Part B
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% Compute the spatial matched filter at 30 degrees
phi_smf = 30;
c_smf = exp(-j*2*pi*spacing*[0:(M-1)]'*sin(phi_smf*pi/180))/sqrt(M);
% The angles at which to evaluate the beampattern
phi = -90:0.2:90;
V = exp(-j*2*pi*spacing*[0:(M-1)]'*sin(phi*pi/180))/sqrt(M);
% Compute the beampatterns for electronic and mechanical steering
C_bp = V'*c_smf;
% Plot out the steered response in decibels
figure
plot(phi,20*log10(abs(C_bp)),'b','linewidth',2.5);
xlabel('Angle (deg)','fontweight','bold','fontsize',20);
ylabel('Power Response (dB)','fontweight','bold','fontsize',20);
set(gca,'fontweight','bold','fontsize',18);
axis([-90 90 -50 0]);
grid
set(gca,'xtick',-90:15:90);