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Talk:Guided Tutorial PSK Demodulation - Revision history
2024-03-29T08:35:06Z
Revision history for this page on the wiki
MediaWiki 1.39.5
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149.149.128.118: /* Polyphase Clock Sync is deprecated */ new section
2023-09-27T19:13:40Z
<p><span dir="auto"><span class="autocomment">Polyphase Clock Sync is deprecated: </span> new section</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:13, 27 September 2023</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This link helped me to understand match filtering using a Raised Cosine (& RRC) filter: https://www.analog.com/media/en/technical-documentation/application-notes/AN-922.pdf</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This link helped me to understand match filtering using a Raised Cosine (& RRC) filter: https://www.analog.com/media/en/technical-documentation/application-notes/AN-922.pdf</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>I think it would also be beneficial to spend a few sentences to describe why some of the filter coeficients were chosen and why they change for different flowgraphs throughout this tutorial.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>I think it would also be beneficial to spend a few sentences to describe why some of the filter coeficients were chosen and why they change for different flowgraphs throughout this tutorial.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== Polyphase Clock Sync is deprecated ==</ins></div></td></tr>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">It would be good to update the example to use a current synchronization block.</ins></div></td></tr>
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149.149.128.118
https://wiki.gnuradio.org/index.php?title=Talk:Guided_Tutorial_PSK_Demodulation&diff=12207&oldid=prev
172.117.65.0: Link to RRC info (Analog Devices AN) and suggestion for future edits
2022-05-02T17:26:26Z
<p>Link to RRC info (Analog Devices AN) and suggestion for future edits</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:26, 2 May 2022</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * \param ntaps number of taps</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * \param ntaps number of taps</div></td></tr>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== RRC Filtering Information Link ==</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">This link helped me to understand match filtering using a Raised Cosine (& RRC) filter: https://www.analog.com/media/en/technical-documentation/application-notes/AN-922.pdf</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">I think it would also be beneficial to spend a few sentences to describe why some of the filter coeficients were chosen and why they change for different flowgraphs throughout this tutorial.</ins></div></td></tr>
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172.117.65.0
https://wiki.gnuradio.org/index.php?title=Talk:Guided_Tutorial_PSK_Demodulation&diff=8260&oldid=prev
172.18.0.3: Provide non-obvious data needed to duplicate tutorial steps.
2021-02-22T05:46:25Z
<p>Provide non-obvious data needed to duplicate tutorial steps.</p>
<p><b>New page</b></p><div>* '''Implementation Hints'''<br />
I greatly appreciate this guided tutorial.<br />
I had some difficulties following along, so the following might help others using this tutorial.<br />
<br />
* '''Hints for mpsk_rrc_rolloff.grc'''<br />
1. Constellation Modulator property Constellation = qpsk_const<br />
This setting uses the Constellation Rect. Object id qpsk_const (aka <con...(m=4))<br />
<br />
* '''Hints for mpsk_stage1.grc'''<br />
1. Constellation Modulator property Constellation = qpsk_const<br />
This setting uses the Constellation Rect. Object id qpsk_const (aka <con...(m=4))<br />
2. Variable id rrc_taps value is firdes.root_raised_cosine(1.0,samp_rate,samp_rate/sps,excess_bw,11*sps).<br />
See [[file:///usr/share/doc/packages/gnuradio/html/firdes_8h_source.html | GNU Radio Manual and C++ API Reference]]<br />
/*!<br />
* \brief design a Root Cosine FIR Filter (do we need a window?)<br />
*<br />
* \param gain overall gain of filter (typically 1.0)<br />
* \param sampling_freq sampling freq (Hz)<br />
* \param symbol_rate symbol rate, must be a factor of sample rate<br />
* \param alpha excess bandwidth factor<br />
* \param ntaps number of taps<br />
*/</div>
172.18.0.3