<div dir="ltr">Hi<div><br></div><div>Thanks for youar advices. I will check them as soon as possible.</div><div>Now I am concentrating on GSM downlink FCCH and SCH channel synchronization.</div><div>Today, the FCCH can be detected roughly.</div>
<div><br></div><div>The repo is expected progressing fast recently.</div><div><br></div><div>BR</div><div><br></div><div>Jiao Xianjun</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jan 2, 2014 at 5:37 AM, Sdr Guru <span dir="ltr"><<a href="mailto:sdrguru1@gmail.com" target="_blank">sdrguru1@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi<div><br></div><div>rtl-sdr-relay<br></div><div>Some of the recommendations.<br></div><div><div>Please add PPM error calculation, exactly like new rtl_test -p but multiple receivers simultaneously.</div>
</div>
<div>It provides immediate information if something is wrong with USB or dongles.<br></div><div><a href="https://github.com/keenerd/rtl-sdr/commit/b5f89dcf40463130e717b6c9bb3a39a3c8b9535f" target="_blank">https://github.com/keenerd/rtl-sdr/commit/b5f89dcf40463130e717b6c9bb3a39a3c8b9535f</a><br>
</div><div><a href="https://github.com/keenerd/rtl-sdr/blob/master/src/rtl_test.c" target="_blank">https://github.com/keenerd/rtl-sdr/blob/master/src/rtl_test.c</a><br></div><div><br></div><div>Please add automatic eeprom PPM calibration</div>
<div><a href="https://github.com/keenerd/rtl-sdr/commit/ecf267737ca52f5005b7a12a352307e8cd763ed6" target="_blank">https://github.com/keenerd/rtl-sdr/commit/ecf267737ca52f5005b7a12a352307e8cd763ed6</a><br></div><div><br></div>
<div>default sample rate 2.4M (28.8/12) or 1.2M (28.8/24), probably lower jitter</div>
<div>MAX_NUM_DEV 4->16 :)<br></div><div><br></div><div>Some nice to have features.<br></div><div>ip binding<br></div><div>multicast support<br></div><div class="gmail_extra">one common (interleaved) stream of all the receivers</div>
<div class="gmail_extra">timestamped stream</div><div class="gmail_extra"><br></div><div class="gmail_extra">I'm trying to convert MATLAB script to Ocatve.<span class="HOEnZb"><font color="#888888"><br></font></span></div>
<span class="HOEnZb"><font color="#888888"><div class="gmail_extra"><br></div></font></span><div class="gmail_extra"><span class="HOEnZb"><font color="#888888">
SG<br><br></font></span><div class="gmail_quote"><div class="im">On Mon, Dec 30, 2013 at 9:38 AM, Jiao Xianjun <span dir="ltr"><<a href="mailto:putaoshu@gmail.com" target="_blank">putaoshu@gmail.com</a>></span> wrote:<br>
</div><div class="im"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div dir="ltr"><div><div>Hi guys,<br><br></div>For the multiple dongles synchronization in signal level instead of bits/packets level, I setup a working repo in github, and write a initial demo framework. See below:<br><br>
<a href="https://github.com/JiaoXianjun/multi-rtl-sdr-udp-relay.git" target="_blank">https://github.com/JiaoXianjun/multi-rtl-sdr-udp-relay.git</a><br><br></div>You may find information and instruction of demo quickly by reading the README.<br>
<div><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
My initial purpose is performing in-fly calibration for multiple dongles according to some pre-known signal (GSM, ADS-B?) to let them work together coherently.</p><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
An ideal scheme may be that we should generate a very narrow band and very week signal in (or just located at the edge of) target working band of dongles, and perform the software in-fly calibration in background (or driver level). This would be user friendly.<br>
</p><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
I know it is far from final state currently, and many things are not clear yet (See TODO). But please join me if you also think this is a good idea. Just check out the demo and run it to have a look.</p><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
Currently I just test the demo in Ubuntu-Linux.</p><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
</p><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
BR</p><span><font color="#888888"><p style="margin:15px 0px;color:rgb(51,51,51);font-family:Helvetica,arial,freesans,clean,sans-serif;font-size:15px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:25px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
Jiao Xianjun<br></p></font></span></div></div><div><div><div class="gmail_extra"><br></div></div></div></blockquote></div></div></div></div>
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