#1633 DMR Decoder redesign. Uses new DQPSK vector/scalar demodulator implementations and soft sync detectors for more accurate detections and symbol timing and symbol period calculations. Includes two new calibrations with scalar and vector implementations for DQPSK demodulator and Interpolator. Enhances DMR error detection and correction algorithms, specifically the block product turbo code algorithms. (#2115)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/test/java/io/github/dsheirer/dsp/psk/dqpsk/DmrSoftSyncDetectorTest.java

@@ -0,0 +1,87 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2024 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.psk.dqpsk;
+
+import io.github.dsheirer.dsp.symbol.Dibit;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetector;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetectorScalar;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetectorVector128;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetectorVector256;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetectorVector512;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSoftSyncDetectorVector64;
+import io.github.dsheirer.module.decode.dmr.sync.DMRSyncPattern;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+/**
+ * JUnit tests for the DMR Soft Sync Detector.
+ */
+public class DmrSoftSyncDetectorTest
+{
+    private static final float SYMBOL_VALUE = (float)(3.0 * Math.PI / 4.0);
+
+    /**
+     * Test: feed each sync pattern into each detector implementation and verify that each detector selected the
+     * correct sync pattern.
+     *
+     * Success: all detector implementations correctly detect all sync patterns.
+     */
+    @Test
+    void testAllSyncPatterns()
+    {
+        DMRSoftSyncDetector scalar = new DMRSoftSyncDetectorScalar();
+        DMRSoftSyncDetector vector64 = new DMRSoftSyncDetectorVector64();
+        DMRSoftSyncDetector vector128 = new DMRSoftSyncDetectorVector128();
+        DMRSoftSyncDetector vector256 = new DMRSoftSyncDetectorVector256();
+        DMRSoftSyncDetector vector512 = new DMRSoftSyncDetectorVector512();
+
+        float symbol;
+
+        for(DMRSyncPattern pattern: DMRSyncPattern.SYNC_PATTERNS)
+        {
+            for(Dibit dibit: pattern.toDibits())
+            {
+                symbol = toSymbol(dibit);
+                scalar.process(symbol);
+                vector64.process(symbol);
+                vector128.process(symbol);
+                vector256.process(symbol);
+                vector512.process(symbol);
+            }
+
+            assertSame(scalar.getDetectedPattern(), pattern, "Scalar Detector Did Not Correctly Detect Pattern: " + pattern);
+            assertSame(vector64.getDetectedPattern(), pattern, "Vector 64 Detector Did Not Correctly Detect Pattern: " + pattern);
+            assertSame(vector128.getDetectedPattern(), pattern, "Vector 128 Detector Did Not Correctly Detect Pattern: " + pattern);
+            assertSame(vector256.getDetectedPattern(), pattern, "Vector 256 Detector Did Not Correctly Detect Pattern: " + pattern);
+            assertSame(vector512.getDetectedPattern(), pattern, "Vector 512 Detector Did Not Correctly Detect Pattern: " + pattern);
+        }
+    }
+
+    /**
+     * Converts the dibit to the optimal symbol value
+     * @param dibit to convert
+     * @return dibit's symbol value in radians.
+     */
+    private static float toSymbol(Dibit dibit)
+    {
+        return dibit == Dibit.D01_PLUS_3 ? SYMBOL_VALUE : -SYMBOL_VALUE;
+    }
+}