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- added peak boxes

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- removed filtering code

git-svn-id: http://moon:8086/svn/software/trunk/projects/GnuRadio@443 b431acfa-c32f-4a4a-93f1-934dc6c82436
This commit is contained in:
jens
2019-05-22 06:24:38 +00:00
parent ea727c975e
commit bc94910920
1 changed files with 12 additions and 9 deletions
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matlab/peak_detect.m
+12 -9
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@@ -41,6 +41,7 @@ am = 0.04;
as = 0.9; as = 0.9;
Ad = 20; Ad = 20;
Cm = 0; Cm = 0;
pbh = 10;
s = zeros(1, Nh); s = zeros(1, Nh);
a = zeros(1, Nh); a = zeros(1, Nh);
@@ -78,6 +79,7 @@ for k=1:numFrames
X = frames(k,:); X = frames(k,:);
X = X(1:Nh); X = X(1:Nh);
end end
% Peak detection % Peak detection
Xs = (1-as)*Xs + as*X; Xs = (1-as)*Xs + as*X;
gate_peak = Xs > (Ad+Xm); gate_peak = Xs > (Ad+Xm);
@@ -97,14 +99,6 @@ for k=1:numFrames
end end
end end
% Filtering
if 0
Nhf = 21;
Ndf = (Nhf-1)/2;
hf = [ones(1, Ndf), 0, -ones(1, Ndf)];
Xf = abs(filter(hf, 1, X)/Nhf);
end
% Output % Output
numPeaksLast = 0; numPeaksLast = 0;
while(1) while(1)
@@ -139,8 +133,17 @@ for k=1:numFrames
peak = peak_count > Cm; peak = peak_count > Cm;
marker_Y = X.*peak; marker_Y = X.*peak;
marker_X = find(peak > 0); marker_X = find(peak > 0);
% Construct peak boxes
peak_boxes = Xm;
for x = find(peak > 0),
pbox_start = max(1, x-pbh);
pbox_end = min(Nh, x+pbh);
peak_boxes(pbox_start:pbox_end) = X(x) * ones(1, pbox_end - pbox_start + 1);
endfor
subplot(2, 1, 1) subplot(2, 1, 1)
plot(1:Nh, X, marker_X, marker_Y(marker_X), '+'); grid; axis([0, Nh, -60, 40]); plot(1:Nh, X, marker_X, marker_Y(marker_X), 'ro', 1:Nh, peak_boxes, 'm-'); grid; axis([0, Nh, -60, 40]);
subplot(2, 1, 2) subplot(2, 1, 2)
plot(1:Nh, Xs, 1:Nh, Xm); grid; axis([0, Nh, -60, 40]); plot(1:Nh, Xs, 1:Nh, Xm); grid; axis([0, Nh, -60, 40]);
pause(1/30); pause(1/30);