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From: | Nick Foster |
Subject: | Re: Symbol timing estimator block and CPM modulations |
Date: | Fri, 31 Jul 2020 17:21:52 -0700 |
Hi Nick:
On Wed, 2020-06-24 at 17:39 -0700, Nick Foster wrote:
> Hi,
>
> I'm finally getting around to doing some more CPM work
I forgot to mention, my company found the GMSK demoulation technique
found in this paper:
https://www.researchgate.net/publication/241629765_Coherent_demodulation_of_AIS-GMSK_signals_in_co-channel_interference
coupled with the "method 0" CFO correction in this paper:
https://www.researchgate.net/publication/290776860_Preprocessing_AIS_Signals_for_Demodulation_in_Co-Channel_Interference
along with analog RF components in front of an SDR, and precise timing
with a GPSDO w/PPS to aid in looking for preambles, gave us fantastic
results for AIS reception in GNURadio.
Although it required quite a few custom blocks.
Anyway, Douglas Nelson seems to have a lot of cool papers available in the public:
https://www.researchgate.net/profile/Douglas_Nelson8
Regards,
Andy
> Best,
> Nick
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