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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Coherent\s+BPSK\s+on\s+LF\s+using\s+EbNaut\s*$/: 49 ]

Total 49 documents matching your query.

1. LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: IZ7SLZ <>
Date: Wed, 23 Sep 2015 02:04:47 +0200
Hello LF, I am pleased to report a successful "Coherent BPSK" QSO between DF6NM and IZ7SLZ on LF using EbNaut program of Paul Nicholson. QSO took place in the night between Friday 2015-09-18 and Satu
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00099.html (11,912 bytes)

2. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: "IZ7PDX Luigi D." <>
Date: Wed, 23 Sep 2015 11:21:43 +0200
Congratulations Domenico! 73 to all... Inviato da iPhone
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00100.html (11,677 bytes)

3. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Andy Talbot <>
Date: Fri, 25 Sep 2015 12:23:40 +0100
EbAnut is a new one here - I hadn't heard of it.   After Googling I found the page and read up / downloaded the software.   Unfortunately, I see it is not standalone, and requires Spectrum lab to act
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00119.html (13,445 bytes)

4. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: John Andrews <>
Date: Fri, 25 Sep 2015 08:29:59 -0400
Some years ago I proposed GPS / UTC seconds locked coherent signalling on LF, but didn't have the expertise to write the software - and certainly not to implement strong FEC ! Andy G4JNT Somewhere ar
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00120.html (11,032 bytes)

5. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Domenico IZ7SLZ <>
Date: Fri, 25 Sep 2015 16:37:02 +0200
Hello Andy,  all thanks for interesting at this test. Yes, Spectrum Lab is the right program to manage the audio from receiver also in this case. The SL configuration used in LF_EbNaut experiment bas
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00124.html (16,537 bytes)

6. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Bill de Carle <>
Date: Fri, 25 Sep 2015 10:41:35 -0400
Somewhere around February, 2004, Bill de Carle, VE2IQ, came out with a version of AFRICAM that implemented GPS-synched BPSK. A number of us played with it in the 160-190 kHz U.S. "Lowfer" band. The G
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00125.html (11,338 bytes)

7. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Andy Talbot <>
Date: Fri, 25 Sep 2015 17:20:50 +0100
That gives me an idea ... For some time I've been toying with the idea of writing  a utility that reads audio in blocks based on UTC timings and saves to a .WAV file . It woudl form part of a long te
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00126.html (18,154 bytes)

8. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Wolfgang Büscher <>
Date: Fri, 25 Sep 2015 21:06:48 +0200
Hi all, If it helps, I could add all necessary settings in the "Quick Settings" menu, including the decimators, SR calibration, etc etc. But for the timestamps in the I/Q recordings, it's very handy
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00128.html (16,090 bytes)

9. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Paul Nicholson <>
Date: Sat, 26 Sep 2015 13:17:05 +0000
Very nice to see this working at LF with short symbols. The phase was stable enough for the 20 or so minutes of each transmission on this path of circa 1000km. S/N of IZ7SLZ at DF6NM suggests that a
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00135.html (12,671 bytes)

10. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Andy Talbot <>
Date: Sat, 26 Sep 2015 15:41:03 +0100
Yessss... Hadn't appreciated that was what it was doing until I read the description in more detail.   I suppose that if soundcards are going to be used as the interface some sort of locking will hav
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00136.html (16,411 bytes)

11. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Paul Nicholson <>
Date: Sun, 27 Sep 2015 07:13:34 +0000
The soundcard becomes a liability for coherent signalling at LF. The fiddly software is all concerned with coping with the wandering soundcard conversion rate. Yes, a small amount of hardware replace
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00141.html (12,813 bytes)

12. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Wolfgang Büscher <>
Date: Sun, 27 Sep 2015 11:02:32 +0200
Sounds like an application for one of those Cortex-M development boards with built-in fast multi-channel ADCs, like the one Alberto recently mentioned here. I have a stm32f429-"discovery" board here.
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00144.html (14,295 bytes)

13. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Markus Vester <>
Date: Sun, 27 Sep 2015 16:40:16 -0400
Thanks very much to Domenico IZ7SLZ for informing the group about our LF EbNaut-PSK activities! I am glad that this has raised some interest, and I'm sure that trying Paul's software is well worth th
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00150.html (35,141 bytes)

14. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Johan Bodin <>
Date: Mon, 28 Sep 2015 12:54:17 +0200
Is it really necessary to mix down to baseband before doing the A/D conversion? Wouldn't direct sampling with fs =  four times the carrier frequency do the trick? I think that an I/Q signal at zero b
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00156.html (18,691 bytes)

15. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Andy Talbot <>
Date: Mon, 28 Sep 2015 12:21:39 +0100
No, this doesn't work as the sampling of the I and Q information must be simultaneous.   Doing it your way, they are offset by a cycle of Fc In fact, I had this very discussion with G3PLX back in 199
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00157.html (22,201 bytes)

16. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Johan Bodin <>
Date: Mon, 28 Sep 2015 15:08:12 +0200
Aha... Thanks Andy. I assume that the second -S2 in your _expression_ of Q is a typo. If changed to -S3 it all makes sense and the mixing with a quadrature LO at Fs/4 becomes clear. It was something
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00159.html (26,029 bytes)

17. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: Andy Talbot <>
Date: Tue, 29 Sep 2015 20:36:05 +0100
Yep, that S2 was a typo. I'm in the process of building a custom direct conversion Rx for narrowband.   So far I've built a follow on digitiser for Softrock or QSD type receivers.  Two identical  opa
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00190.html (16,430 bytes)

18. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: IZ7SLZ <>
Date: Thu, 01 Oct 2015 01:53:08 +0200
Hello LF and all, here's my "2 cents" about coherent-bpsk transmit point of view. I will briefly describe the setup used by me during the tests and QSO with DF6NM. I have employed an old analog SSB E
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00000.html (14,503 bytes)

19. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: DK7FC <>
Date: Thu, 01 Oct 2015 16:29:52 +0200
Hi Domenico, Thanks for your report. I see you on my OPDS32 grabber, as you say. 2015-09-28 21:00:47 IZ7SLZ 1159km 137502.120Hz 1mHz -46.7dBOp 93% 17.9dB 2015-09-28 20:00:47 IZ7SLZ 1159km 137502.120H
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00002.html (15,818 bytes)

20. Re: LF: Coherent BPSK on LF using EbNaut (score: 1)
Author: IZ7SLZ <>
Date: Thu, 01 Oct 2015 18:57:51 +0200
Hallo Stefan, thank you very much for your message. On 10/1/2015 4:29 PM, DK7FC wrote: Hi Domenico, Thanks for your report. I see you on my OPDS32 grabber, as you say. 2015-09-28 21:00:47 IZ7SLZ  115
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-10/msg00003.html (15,825 bytes)


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