hamnet70-gnuradio-legacy/gr-hamnet70/grc/hamnet70_correct_frequency.xml

<?xml version="1.0"?>
<block>
  <name>Correct Frequency</name>
  <key>hamnet70_correct_frequency</key>
  <category>[hamnet70]</category>
  <import>import hamnet70</import>
  <make>hamnet70.correct_frequency($symbols)</make>

  <param>
    <name>Symbols</name>
    <key>symbols</key>
    <type>complex_vector</type>
  </param>

  <sink>
    <name>in</name>
    <type>complex</type>
  </sink>

  <source>
    <name>out</name>
    <type>complex</type>
  </source>

</block>
Added frequency estimator blocks - 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. 2019-07-23 23:16:48 +02:00			`<?xml version="1.0"?>`
			`<block>`
			`<name>Correct Frequency</name>`
			`<key>hamnet70_correct_frequency</key>`
			`<category>[hamnet70]</category>`
			`<import>import hamnet70</import>`
			`<make>hamnet70.correct_frequency($symbols)</make>`

			`<param>`
			`<name>Symbols</name>`
			`<key>symbols</key>`
			`<type>complex_vector</type>`
			`</param>`

			`<sink>`
			`<name>in</name>`
			`<type>complex</type>`
			`</sink>`

			`<source>`
			`<name>out</name>`
			`<type>complex</type>`
			`</source>`

			`</block>`