Normalise pulse shaping. Enable RTTY Mod in Demod analyser.

2024-11-22 08:04:49 -05:00 · 2023-09-04 09:36:19 +01:00 · 2023-09-04 09:36:19 +01:00 · 0f0c1e108b
commit 0f0c1e108b
parent ad2bb38bfc
5 changed files with 123 additions and 62 deletions
--- a/.gitignore
+++ b/.gitignore
@ -43,3 +43,4 @@ obj-x86_64-linux-gnu/*

 /rescuesdriq/vendor/
 /rescuesdriq/Godeps/
+/.vs
--- a/CMakePresets.json
+++ b/CMakePresets.json
@ -1,56 +1,94 @@
 {
    "version": 3,
    "configurePresets": [
-        {
-            "name": "default",
-            "binaryDir": "build-default",
-            "cacheVariables": {
-                "DEBUG_OUTPUT": "ON",
-                "AIRSPYHF_DIR": "/opt/install/libairspyhf",
-                "AIRSPY_DIR": "/opt/install/libairspy",
-                "APT_DIR": "/opt/install/aptdec",
-                "BLADERF_DIR": "/opt/install/libbladeRF",
-                "CM256CC_DIR": "/opt/install/cm256cc",
-                "CODEC2_DIR": "/opt/install/codec2",
-                "DAB_DIR": "/opt/install/libdab",
-                "DSDCC_DIR": "/opt/install/dsdcc",
-                "HACKRF_DIR": "/opt/install/libhackrf",
-                "HAMLIB_DIR": "/opt/build/hamlib-prefix",
-                "IIO_DIR": "/opt/install/libiio",
-                "LIBSIGMF_DIR": "/opt/install/libsigmf",
-                "LIMESUITE_DIR": "/opt/install/LimeSuite",
-                "MBE_DIR": "/opt/install/mbelib",
-                "MIRISDR_DIR": "/opt/install/libmirisdr",
-                "PERSEUS_DIR": "/opt/install/libperseus",
-                "RTLSDR_DIR": "/opt/install/librtlsdr",
-                "SERIALDV_DIR": "/opt/install/serialdv",
-                "SGP4_DIR": "/opt/install/sgp4",
-                "SOAPYSDR_DIR": "/opt/install/SoapySDR",
-                "UHD_DIR": "/opt/install/uhd",
-                "XTRX_DIR": "/opt/install/xtrx-images",
-                "CMAKE_INSTALL_PREFIX": "/opt/install/sdrangel"
-            },
-            "warnings": {
-                "dev": false
-            }
+      {
+        "name": "default",
+        "binaryDir": "build-default",
+        "cacheVariables": {
+          "DEBUG_OUTPUT": "ON",
+          "AIRSPYHF_DIR": "/opt/install/libairspyhf",
+          "AIRSPY_DIR": "/opt/install/libairspy",
+          "APT_DIR": "/opt/install/aptdec",
+          "BLADERF_DIR": "/opt/install/libbladeRF",
+          "CM256CC_DIR": "/opt/install/cm256cc",
+          "CODEC2_DIR": "/opt/install/codec2",
+          "DAB_DIR": "/opt/install/libdab",
+          "DSDCC_DIR": "/opt/install/dsdcc",
+          "HACKRF_DIR": "/opt/install/libhackrf",
+          "HAMLIB_DIR": "/opt/build/hamlib-prefix",
+          "IIO_DIR": "/opt/install/libiio",
+          "LIBSIGMF_DIR": "/opt/install/libsigmf",
+          "LIMESUITE_DIR": "/opt/install/LimeSuite",
+          "MBE_DIR": "/opt/install/mbelib",
+          "MIRISDR_DIR": "/opt/install/libmirisdr",
+          "PERSEUS_DIR": "/opt/install/libperseus",
+          "RTLSDR_DIR": "/opt/install/librtlsdr",
+          "SERIALDV_DIR": "/opt/install/serialdv",
+          "SGP4_DIR": "/opt/install/sgp4",
+          "SOAPYSDR_DIR": "/opt/install/SoapySDR",
+          "UHD_DIR": "/opt/install/uhd",
+          "XTRX_DIR": "/opt/install/xtrx-images",
+          "CMAKE_INSTALL_PREFIX": "/opt/install/sdrangel"
        },
-        {
-            "name": "default-qt6",
-            "inherits": "default",
-            "binaryDir": "build-qt6",
-            "cacheVariables": {
-                "ENABLE_QT6": "ON"
-            }
+        "warnings": {
+          "dev": false
+        },
+        "vendor": {
+          "microsoft.com/VisualStudioSettings/CMake/1.0": {
+            "hostOS": [ "Linux" ]
+          }
        }
+      },
+      {
+        // Don't inherit from "default", as we don't want UHD_DIR etc set
+        "name": "default-windows",
+        "binaryDir": "c:/users/jon/source/repos/sdrangel/build",
+        "cacheVariables": {
+          "CMAKE_BUILD_TYPE": "RelWithDebInfo",
+          "DEBUG_OUTPUT": "ON",
+          "RX_SAMPLE_24BIT": "ON",
+          "DARCH_OPT": "SSE4_1",
+          "HIDE_CONSOLE": "OFF",
+          "ENABLE_AIRSPY": "ON",
+          "ENABLE_BLADERF": "OFF",
+          "ENABLE_HACKRF": "OFF",
+          "ENABLE_IIO": "OFF",
+          "ENABLE_MIRISDR": "OFF",
+          "ENABLE_PERSEUS": "OFF",
+          "ENABLE_XTRX": "OFF",
+          "BUILD_SERVER": "OFF",
+          "CMAKE_PREFIX_PATH": "C:/Qt/5.15.2/msvc2019_64;C:/Applications/boost_1_81_0"
+        },
+        "warnings": {
+          "dev": false
+        },
+        "vendor": {
+          "microsoft.com/VisualStudioSettings/CMake/1.0": {
+            "hostOS": [ "Windows" ]
+          }
+        }
+      },
+      {
+        "name": "default-qt6",
+        "inherits": "default",
+        "binaryDir": "build-qt6",
+        "cacheVariables": {
+          "ENABLE_QT6": "ON"
+        }
+      }
    ],
-    "buildPresets": [
-        {
-          "name": "default",
-          "configurePreset": "default"
-        },
-        {
-            "name": "default-qt6",
-            "configurePreset": "default-qt6"
-        }
-    ]
+  "buildPresets": [
+    {
+      "name": "default",
+      "configurePreset": "default"
+    },
+    {
+      "name": "default-windows",
+      "configurePreset": "default-windows"
+    },
+    {
+      "name": "default-qt6",
+      "configurePreset": "default-qt6"
+    }
+  ]
 }
--- a/plugins/channeltx/modrtty/readme.md
+++ b/plugins/channeltx/modrtty/readme.md
@ -2,7 +2,10 @@

 <h2>Introduction</h2>

-This plugin can be used to transmit RTTY encoded text.
+This plugin can be used to modulate RTTY (Radioteletype) encoded text.
+RTTY uses BFSK (Binary Frequency Shift Keying), where transmission of data alternates between two frequencies,
+the mark frequency and the space frequency. The RTTY Modulator should be centered in between these frequencies.
+The baud rate, frequency shift (difference between mark and space frequencies), filter bandwidth and baudot character set are configurable.

 <h2>Interface</h2>

@ -64,7 +67,14 @@ UDP port number to receive text to be transmitted on.

 <h3>13: Baudot Character Set</h3>

-Specifies the Baudot character set used to encode the text to transmit.
+Specifies the Baudot character set used to encode the text to transmit. The following character sets are supported:
+
+* ITA 2
+* UK
+* European
+* US
+* Russian
+* Murray

 <h3>14: Bit Ordering</h3>

@ -90,11 +100,20 @@ Press to clear the transmitted text.

 Enter text to transmit. Pressing return will transmit the text and clear this field. Press the arrow to display and select a list of pre-defined text or previously transmitted text to enter in to the field.

+The list of pre-defined text can be customised via the Transmit Settings dialog (20).
+
 <h3>20: TX</h3>

-Press to transmits the current text. The text field will not be cleared.
+Press to transmit the current text. The text field will not be cleared.

-Right click to open a dialog to adjust additional transmitter settings.
+Right click to open a dialog to adjust additional Transmit Settings, including the list of pre-defined text.
+
+Predefined text supports the following variable substitutions:
+
+* ${callsign} - Gets replaced with the station name from Preferences > My Position
+* ${location} = Gets replaced with the Maidenhead locator for the position specified under Preferences > My Position
+
+The substitutions are applied when the Transmit Settings dialog is closed.

 <h2>API</h2>

--- a/plugins/channeltx/modrtty/rttymodsource.cpp
+++ b/plugins/channeltx/modrtty/rttymodsource.cpp
@ -43,7 +43,7 @@ RttyModSource::RttyModSource() :
 {
    m_bits.append(0);
    m_lowpass.create(301, m_channelSampleRate, 400.0 / 2.0);
-    m_pulseShape.create(0.5, 6, m_channelSampleRate/45.45);
+    m_pulseShape.create(0.5, 6, m_channelSampleRate / 45.45, true);

    m_demodBuffer.resize(1<<12);
    m_demodBufferFill = 0;
@ -121,7 +121,7 @@ void RttyModSource::sampleToSpectrum(Complex sample)

 void RttyModSource::modulateSample()
 {
-    Real audioMod;
+    Real mod;

    if (m_sampleIdx == 0)
    {
@ -154,18 +154,18 @@ void RttyModSource::modulateSample()
    if (m_settings.m_pulseShaping)
    {
        if (m_sampleIdx == 1) {
-            audioMod = m_pulseShape.filter(m_bit ? 1.0f : -1.0f);
+            mod = m_pulseShape.filter(m_bit ? 1.0f : -1.0f);
        } else {
-            audioMod = m_pulseShape.filter(0.0f);
+            mod = m_pulseShape.filter(0.0f);
        }
    }
    else
    {
-        audioMod = m_bit ? 1.0f : -1.0f;
+        mod = m_bit ? 1.0f : -1.0f;
    }

    // FM
-    m_fmPhase += m_phaseSensitivity * audioMod * (m_settings.m_spaceHigh ? -1.0f : 1.0f);
+    m_fmPhase += m_phaseSensitivity * mod * (m_settings.m_spaceHigh ? -1.0f : 1.0f);
    // Keep phase in range -pi,pi
    if (m_fmPhase > M_PI) {
        m_fmPhase -= 2.0f * M_PI;
@ -194,7 +194,8 @@ void RttyModSource::modulateSample()
    Real s = std::real(m_modSample);
    calculateLevel(s);

-    m_demodBuffer[m_demodBufferFill] = audioMod * std::numeric_limits<int16_t>::max();
+    // Send to demod analyser
+    m_demodBuffer[m_demodBufferFill] = mod * std::numeric_limits<int16_t>::max();
    ++m_demodBufferFill;

    if (m_demodBufferFill >= m_demodBuffer.size())
@ -258,7 +259,7 @@ void RttyModSource::applySettings(const RttyModSettings& settings, bool force)
                << " symbolSpan: " << settings.m_symbolSpan
                << " channelSampleRate:" << m_channelSampleRate
                << " baud:" << settings.m_baud;
-        m_pulseShape.create(settings.m_beta, m_settings.m_symbolSpan, m_channelSampleRate/settings.m_baud);
+        m_pulseShape.create(settings.m_beta, settings.m_symbolSpan, m_channelSampleRate/settings.m_baud, true);
    }

    if ((settings.m_characterSet != m_settings.m_characterSet) || force) {
@ -302,7 +303,7 @@ void RttyModSource::applyChannelSettings(int channelSampleRate, int channelFrequ
                << " symbolSpan: " << m_settings.m_symbolSpan
                << " channelSampleRate:" << m_channelSampleRate
                << " baud:" << m_settings.m_baud;
-        m_pulseShape.create(m_settings.m_beta, m_settings.m_symbolSpan, channelSampleRate/m_settings.m_baud);
+        m_pulseShape.create(m_settings.m_beta, m_settings.m_symbolSpan, channelSampleRate/m_settings.m_baud, true);
    }

    if ((m_channelSampleRate != channelSampleRate) || force)
--- a/plugins/feature/demodanalyzer/demodanalyzersettings.cpp
+++ b/plugins/feature/demodanalyzer/demodanalyzersettings.cpp
@ -38,6 +38,7 @@ const QStringList DemodAnalyzerSettings::m_channelTypes = {
    QStringLiteral("PacketDemod"),
    QStringLiteral("PacketMod"),
    QStringLiteral("RadiosondeDemod"),
+    QStringLiteral("RTTYMod"),
    QStringLiteral("SSBDemod"),
    QStringLiteral("SSBMod"),
    QStringLiteral("WFMDemod"),
@ -60,6 +61,7 @@ const QStringList DemodAnalyzerSettings::m_channelURIs = {
    QStringLiteral("sdrangel.channel.packetdemod"),
    QStringLiteral("sdrangel.channeltx.modpacket"),
    QStringLiteral("sdrangel.channel.radiosondedemod"),
+    QStringLiteral("sdrangel.channeltx.modrtty"),
    QStringLiteral("sdrangel.channel.ssbdemod"),
    QStringLiteral("sdrangel.channeltx.modssb"),
    QStringLiteral("sdrangel.channel.wfmdemod"),