User contributions for Jesternofool
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6 January 2025
- 03:5903:59, 6 January 2025 diff hist +211 Talk:Tutorials →Tutorials should have a section on "Signal Basics": new section current
31 December 2024
- 16:2716:27, 31 December 2024 diff hist +4 m Quadrature Demod Corrected some links current
- 03:3303:33, 31 December 2024 diff hist +3,521 Quadrature Demod Revised to add more conceptual understanding to go with the math. Added several diagrams for a polar discriminator, along with a link to the James Shima paper on the polar discriminator.
- 03:2903:29, 31 December 2024 diff hist 0 File:Polar-discriminator-output-time-domain.png Jesternofool uploaded a new version of File:Polar-discriminator-output-time-domain.png current
- 03:1803:18, 31 December 2024 diff hist +378 N File:Polar-discriminator-output-time-domain.png The output of the polar discriminator is the frequency deviation of the input FM signal. FM broadcast stations in the US use deviation values between 75 kHz (the typical value) up to ~82 kHz (in some instances). By setting the "Gain" value in the Quadrature Demod block to samp_rate/(2*pi), the output will have amplitude values of the deviation of the FM carrier.
- 03:1203:12, 31 December 2024 diff hist +130 N File:FM-demod-with-quad-demod-block.png Gnu Radio flowgraph showing FM demodulation of a FM broadcast station (USA) using the Quadrature Demodulation block. current
- 02:0302:03, 31 December 2024 diff hist +612 N File:Polar-discriminator-GRC-block-diagram.png Gnu Radio Companion equivalent flowgraph of the "Quadrature Demod" block. This is a polar discriminator circuit. The input complex samples are split. One sample is sent to a Multiply block, while the second set are delayed and conjugated before being fed into the Multiply block. The output of the Multiply block will also be complex samples, except they are now the phase difference between consecutive samples. The Complex to Arg block calculates the actual phase, in radians, for each of these... current
- 01:3801:38, 31 December 2024 diff hist +252 N File:Polar-Discriminator-Delay-Conjugate-Method.jpg Block diagram of polar discriminator. The input complex samples are split. One sample goes straight to a multiplier. The second sample is delayed and conjugated (the imaginary component has its sign flipped), then input to the multiplier. current
- 01:2901:29, 31 December 2024 diff hist +161 N File:Phase-change-constellation-diagram.jpg Constellation diagram showing how frequency modulation will cause consecutive samples to change phase, as frequency is a change of phase over time. current
14 July 2024
- 13:4113:41, 14 July 2024 diff hist +321 Frequency Shifting Added scenarios where frequency shifting is useful, and some minor grammatical changes current
- 01:2501:25, 14 July 2024 diff hist +2,043 Low Pass Filter Example Added section on viewing the full impulse response. current
- 01:1201:12, 14 July 2024 diff hist +81 N File:Frequency-sink-properties-annotated.png Properties of frequency sink utilized in impulse response flowgraph current
- 01:1001:10, 14 July 2024 diff hist +71 N File:LPF-properties-annotated.png Low pass filter properties for impulse response flowgraph current
- 00:4600:46, 14 July 2024 diff hist +102 N File:LPF-filter-with-vector-source-flowgraph.png Flowgraph of lowpass filter showing how to display the spectrum of its impulse response. current
- 00:2500:25, 14 July 2024 diff hist +80 N File:Filter-impulse-response-spectrum.png This is the spectrum of the impulse response of a low pass filter. current
6 July 2024
- 22:3622:36, 6 July 2024 diff hist +33 m Correlate Access Code - Tag Made link to "Correlate Access Code" more user-readable. current
- 22:3322:33, 6 July 2024 diff hist +108 Correlate Access Code Added link to "Correlate Access Code - Tag" block, as that was the replacement for this block. current
23 May 2024
- 22:1522:15, 23 May 2024 diff hist +6 USRP Sink Cleaned up some grammar current
- 17:3117:31, 23 May 2024 diff hist +32 Complex to Mag Added diagram showing magnitude calculation from IQ sample values. current
- 17:2717:27, 23 May 2024 diff hist +82 N File:Complex-mag.jpg Diagram showing how the magnitude of a complex sample is calculated. current
11 May 2024
- 12:5212:52, 11 May 2024 diff hist +587 ATSC Added update covering ATSC 3.0 vs ATSC 1.0
- 12:5012:50, 11 May 2024 diff hist +116 N File:ATSC04-Ch38.jpg ATSC 1.0 spectrum and spectrogram. The spectral line on the left edge of the signal is the pilot tone. current
- 12:3112:31, 11 May 2024 diff hist +220 N File:ATSC-Ver3-Ch25-02.png Spectrum and spectrogram of ATSC 3.0 signal. The portion of the signal seen to the right of the 3.0 signal is a ATSC 1.0 transmission. The pilot tone for that transmission is the spectral line on the right. current
3 May 2024
- 01:2401:24, 3 May 2024 diff hist +19 File Sink Corrected format for integer. It IS two's complement. current
30 April 2024
- 22:0322:03, 30 April 2024 diff hist −6 File Sink Corrected format (binary, not two's complement) for integer types.
- 00:2200:22, 30 April 2024 diff hist +1,189 File Sink Expanded upon number type for storage.
20 April 2024
- 17:5517:55, 20 April 2024 diff hist +124 Reading Binary Files Added math formatting to exponentials
13 April 2024
- 19:5919:59, 13 April 2024 diff hist −2 m FFT Low Pass Filter Corrected link syntax. current
- 19:5519:55, 13 April 2024 diff hist +1,644 N FFT Low Pass Filter Created page, added description, parameters, example, and source files.
- 19:3219:32, 13 April 2024 diff hist +159 N File:NwrReceiver.jpg NOAA Weather Radio (NWR) receiver, to include both frequency and time domain displays. This flowgraph demonstrates the FFT Low Pass Filter block. current
- 18:5618:56, 13 April 2024 diff hist +924 Complex to Arg Added a mathematical description section, an example flowgraph, and the source files. current
- 18:4018:40, 13 April 2024 diff hist +255 N File:Complex2ArgDemo.jpg This flowgraph demodulates a FM broadcast station. It demonstrates using the "Complex to Arg" block. The blocks from the output of the lowpass filter to the output of the "Multiply Const" block are equivalent to the "Quadrature Demod" block. current
- 17:3117:31, 13 April 2024 diff hist +3,419 Complex to Mag Squared Expanded description and added two examples using the Complex to Mag^2 block. current
- 17:2217:22, 13 April 2024 diff hist +163 N File:MeasureFmSignalPower.grc Flowgraph used to measure the signal-to-noise ratio (SNR) of a FM broadcast station. This flowgraph demonstrates a use of the Complex to Mag^2 block. current
- 17:2017:20, 13 April 2024 diff hist +169 N File:ComplexMagSquaredSpectrum.grc Flowgraph used to create a basic spectral display. This is used to demonstrate how a spectral display is created using the FFT and Complex to Mag^2 blocks. current
- 17:1317:13, 13 April 2024 diff hist +151 N File:ComplexMagSquaredSpectrum.jpg Flowgraph used to create a basic spectral display. This demonstrates several blocks, including the FFT and Complex to Mag Squared blocks. current
- 17:0317:03, 13 April 2024 diff hist +67 N File:Complex-to-Mag2-block-properties.png Property window for the Complex to Mag Squared block. current
- 17:0017:00, 13 April 2024 diff hist +72 N File:Complex-to-Mag2-block.png This is the GRC display of a Complex to Mag Squared block. current
- 16:5516:55, 13 April 2024 diff hist +115 N File:Measure-signal-power-display.png Display from the flowgraph used to measure the signal-to-noise ratio (SNR) of a FM broadcast station. current
- 16:4816:48, 13 April 2024 diff hist +4 m File:MeasureFmSignalPower.jpg No edit summary current
- 16:4716:47, 13 April 2024 diff hist +229 N File:MeasureFmSignalPower.jpg This is a flowgraph that will calculate the signal-to-noise ratio (SNR) of a FM broadcast station using a RTL-SDR. This flowgraph demonstrates both measuring signal power and use of the '''Complex to Mag^2''' block.
- 01:5001:50, 13 April 2024 diff hist +46 Phase Shift Added link to GRC file for the shown flowgraph. current
- 01:4501:45, 13 April 2024 diff hist +81 N File:PhaseShiftDemo.grc This is the GRC file used to demonstrate the Phase Shift block. current
- 01:2301:23, 13 April 2024 diff hist +13 Phase Shift Modified the source file links to make them more inline with other Gnu Radio wiki pages.
- 01:0701:07, 13 April 2024 diff hist +72 Phase Shift Added link for public header file
- 00:3900:39, 13 April 2024 diff hist +23 m Phase Shift No edit summary
- 00:3800:38, 13 April 2024 diff hist +79 Phase Shift Added links for C++ and header files
12 April 2024
- 23:3723:37, 12 April 2024 diff hist −23 Phase Shift Removed "Stub" category
- 19:3719:37, 12 April 2024 diff hist +202 Phase Shift Added display from running flowgraph.
- 19:2419:24, 12 April 2024 diff hist +185 N File:Phase-shift-demo-display.png This is the time domain (left) and constellation (Argand) diagram showing the phase shift of a complex sinusoid. The phase has been shifted +125 degrees (3π/4 radians). current