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improved midpoint approximation

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This commit is contained in:
Ahmet Inan 2024-04-17 17:39:47 +02:00
parent 1a1f061e1c
commit 503fc50bb2
1 changed files with 7 additions and 2 deletions
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9
app/src/main/java/xdsopl/robot36/Demodulator.java
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@ -42,6 +42,7 @@ public class Demodulator {
NineMilliSeconds, NineMilliSeconds,
TwentyMilliSeconds TwentyMilliSeconds
} }
public SyncPulseWidth syncPulseWidth; public SyncPulseWidth syncPulseWidth;
public int syncPulseOffset; public int syncPulseOffset;
@ -125,10 +126,14 @@ public class Demodulator {
} else if (syncPulseCounter > syncPulseLowMark && syncPulseCounter < syncPulseHighMark) { } else if (syncPulseCounter > syncPulseLowMark && syncPulseCounter < syncPulseHighMark) {
int filterDelay = (powerAvg.length - 1) / 2 - (scanLineFilter.length - 1) / 2; int filterDelay = (powerAvg.length - 1) / 2 - (scanLineFilter.length - 1) / 2;
syncPulseOffset = i - syncPulseCounter - filterDelay; syncPulseOffset = i - syncPulseCounter - filterDelay;
if (syncPulse20msMaxValue > (9.f / 20.f) * syncPulse9msMaxValue) { float mid9ms20msSum = ((9.f / 20.f) + 1.f) / 2.f;
float mid9ms20msPwr = mid9ms20msSum * mid9ms20msSum;
float mid5ms9msSum = ((5.f / 9.f) + 1.f) / 2.f;
float mid5ms9msPwr = mid5ms9msSum * mid5ms9msSum;
if (syncPulse20msMaxValue > mid9ms20msPwr * syncPulse9msMaxValue) {
syncPulseOffset += syncPulse20msMaxPosition; syncPulseOffset += syncPulse20msMaxPosition;
syncPulseWidth = SyncPulseWidth.TwentyMilliSeconds; syncPulseWidth = SyncPulseWidth.TwentyMilliSeconds;
} else if (syncPulse9msMaxValue > (5.f / 9.f) * syncPulse5msMaxValue) { } else if (syncPulse9msMaxValue > mid5ms9msPwr * syncPulse5msMaxValue) {
syncPulseOffset += syncPulse9msMaxPosition; syncPulseOffset += syncPulse9msMaxPosition;
syncPulseWidth = SyncPulseWidth.NineMilliSeconds; syncPulseWidth = SyncPulseWidth.NineMilliSeconds;
} else { } else {