Re: Lunar Orbiting Platform Gateway

[Michelle Thompson]

Yes - I'm attempting to get a copy of the slides from recent ARISS
presentations. There was a diagram with planned frequencies. Plenty to work
with.

-Michelle W5NYV




On Wed, Oct 30, 2019 at 11:57 AM John Malsbury 
wrote:

> And you mentioned something about amateur radio portions, Michelle?
>
> On Wed, Oct 30, 2019 at 11:52 AM Kevin K Gifford <
> kevin.giff...@colorado.edu> wrote:
>
>> Hi -
>>
>> I am involved in recommending the radio communications architecture for
>> Gateway which is baselined to utilize CCSDS (see cases.org) protocols.
>>
>> For long-haul RF links (Gateway to Earth) Unified Space Link Protocol
>> (USLP).
>>
>> For short-haul RF (Gateway to lunar surface): Proximity-1 and AOS
>>
>> For proximity wireless networks (around Gateway and on lunar surface)
>> 802.11 n/ac baselined, 802.11ax and LTE are under strong consideration.
>>
>> Please feel free to respond directly if additional information is needed
>> and I’ll strive to assist.
>>
>> Kevin
>> --
>> *From:* Discuss-gnuradio > colorado@gnu.org> on behalf of John Malsbury <
>> jmalsbury.perso...@gmail.com>
>> *Sent:* Wednesday, October 30, 2019 12:34 PM
>> *To:* Michelle Thompson 
>> *Cc:* discuss-gnuradio@gnu.org 
>> *Subject:* Re: Lunar Orbiting Platform Gateway
>>
>> It was a cheap joke on my part (and not at all commentary on the gateway
>> concept).  Disregard.
>>
>> I'd be down to collaborate on something open source.  Could you point to
>> publicly available documents that summarize the standards/specs?
>>
>> -John
>>
>> On Wed, Oct 30, 2019 at 8:50 AM Michelle Thompson <
>> mountain.miche...@gmail.com> wrote:
>>
>> I was hesitant to ask why, but I'm curious now.
>>
>> I know the Gateway is controversial. I understand there's a lot of doubt
>> it will actually happen. The heavy emphasis on commercial activity is
>> another aspect.
>>
>> However, I've been asked for help on a receiving station for the amateur
>> radio portions that might be included. There's a lot of overlap between
>> what I do and the type of communications proposed.
>>
>> Comment and critique would be very appreciated here.
>>
>> -Michelle W5NYV
>>
>>
>>
>>
>> On Wed, Oct 30, 2019 at 7:14 AM Müller, Marcus (CEL) 
>> wrote:
>>
>> Hey John,
>>
>> > > Anyone working on…
>> > Definitely not
>>
>> Does that imply they're finished?
>>
>> Best regards,
>> Marcus
>>
>>

Re: How to efficiently implement dechannelization (combine multiple narrowband signals into a single broadband spectrum)

[Kevin Reid]

On Mon, Oct 28, 2019 at 10:12 PM Amr Bekhit  wrote:

> I'm working on an SDR project where I need to transmit a narrow
> baseband signal on multiple different carriers simultaneously, over a
> relatively wide bandwidth (1Mhz). … an external audio
> source is then AM modulated and transmitted on several channels …
>


> In my case the output channels are arbitrary, …
>

If you do not need precisely selected frequencies and amplitudes, a
computationally cheap way to generate many copies of a signal is to
multiply the baseband by a carrier signal high in harmonics (such as a
square or sawtooth wave). The signal will appear at the frequency (and
amplitude) of each harmonic. In order for the spectrum to be otherwise
clean, make sure the carrier frequency is an even division of the sample
rate.

This is similar to the effect where a signal overloading a SDR receiver
will appear duplicated across the received spectrum.


harmonic-signal-duplicator.grc
Description: Binary data

GNURadio hardware acceleration on Zynq

[Thabet GHARBI]

Hello,

Is there an updated wiki/tutorial about GNURadio hardware acceleration on
Zynq?
This one is obsolete:
https://wiki.gnuradio.org/index.php/Zynq

Any new works/feedback about offloading GR blocks to FPGA?

Thanks.

Best Regards,

Gnuradio for windows

[alireza nazari]

Hi,

It looks like the link for downloading gnuradio for windows in wiki
 is broken and the
website is down. Is there anywhere other than Pothos that I can download
gnuradio binary files for windows? I am having some problems with Pothos
UHD drivers and I am trying to stay away from it.

Regards,
Ali