Thomas Kolb
cd9784efb6
- correct_frequency: Correct frequency by averaging the phase drift on
the preamble
- freq_est_lr: Luise & Reggiannini frequency estimator
- pid_controller: a PID controller that takes error values at the input
and generates steering values at the output
The combination of freq_est_lr and PID controller can be used together
with an NCO (signal source) to create a closed control loop for
frequency offset compensation.
38 lines
637 B
XML
38 lines
637 B
XML
<?xml version="1.0"?>
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<block>
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<name>L&R Data-Aided Freq. Est.</name>
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<key>hamnet70_freq_est_lr</key>
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<category>[hamnet70]</category>
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<import>import hamnet70</import>
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<make>hamnet70.freq_est_lr($symbols, $kappa)</make>
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<param>
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<name>Preamble Symbols</name>
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<key>symbols</key>
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<type>complex_vector</type>
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</param>
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<param>
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<name>Kappa</name>
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<key>kappa</key>
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<type>int</type>
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</param>
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<sink>
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<name>in</name>
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<type>complex</type>
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</sink>
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<source>
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<name>out</name>
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<type>float</type>
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</source>
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<source>
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<name>freq_offset</name>
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<type>message</type>
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<optional>1</optional>
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</source>
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</block>
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