worked on FIR-Convolution and LocalMaxima detection

tests/math/dsp/TestFIRComplex.cpp

@@ -0,0 +1,45 @@
+#ifdef WITH_TESTS
+
+#include <fstream>
+#include "../../Tests.h"
+#include "../../../math/dsp/FIRComplex.h"
+#include <random>
+
+
+TEST(FIRComplex, filter1) {
+
+	const float sRate = 200;
+	const float freq = 10;
+
+	FIRComplex f(sRate);
+	f.lowPass(5, 50);	f.dumpKernel("/tmp/k1.m", "k1");
+	f.shiftBy(freq);	f.dumpKernel("/tmp/k2.m", "k2");
+
+	std::minstd_rand gen;
+	std::normal_distribution<float> noise(0.0, 0.3);
+
+	std::vector<std::complex<float>> out;
+
+	std::ofstream fileO("/tmp/orig.dat");
+	std::ofstream fileF("/tmp/filtered.dat");
+
+	for (int i = 0; i < 1000; ++i) {
+		const float t = i / sRate;
+		const float n = noise(gen);
+		const float s = std::sin(2*M_PI*freq*t);
+		const float v = s+n;
+		std::vector<float> values;
+		values.push_back(s+n);
+		fileO << v << "\n";
+		std::vector<std::complex<float>> res = f.append(values);
+		out.insert(out.end(), res.begin(), res.end());
+	}
+
+
+	for (const std::complex<float> c : out) {
+		fileF << c.real() << "\n";
+	}
+
+}
+
+#endif