[hpsdr] A idea

[Helmut]

Yes I know these linked D-star repeaters, but please ask the users how often these stations are blocked due to bad network management. I prefer self-sustaining solutions. It's certainly possible to provide a wireless 'remote' channel in the radio. Please keep in mind that you can't expect fast internet access in every low-noise environment.

Respective to your application the sdr currently provides only one TX port, i.e. only one user can transmit simultaneously. In many respects it would be fine to have at least more DACs on board. Necessary filtering and amplification could be done in separate modules.

73, Helmut, DC6NY 

-----Ursprüngliche Nachricht-----
Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Håken Hveem
Gesendet: Samstag, 22. November 2014 17:50
An: hpsdr at lists.openhpsdr.org
Betreff: Re: [hpsdr] A idea

***** High Performance Software Defined Radio Discussion List *****

No, RX/TX on all modules at the same time is not needed for all the users of the system, only one or two bands per user.
There is of course a limit of how many users the system can handle at once, a fair limit is 4 users.
The Internet is already used for "remote", if you account D-Star repeaters.


On 20. nov. 2014 14:51, Helmut wrote:
> Hi,
>
> I wonder if you expect these system capabilities of the current HPSDR architecture. If you require simultaneous RX/TX operation on all mentioned bands it’s certainly not possible with the current design and we do not have a MIMO (multiple in-multiple out) structure. 
> You are right pointing out the increasing problems caused by EM pollution and remote operation could minimize these issues besides other methods like diversity etc.. I’m no fan of internet remote. That’s an offense against the ham radio ideas in my eyes, but we could use wireless remote channels on UHF/SHF. Of course range and number of possible remote users would be limited. Such a solution would be also affordable for individual usage. BTW that's the reason why I would appreciate a productive discussion about future HPSDR hardware.
>
> 73, Helmut, DC6NY
>
> -----Ursprüngliche Nachricht-----
> Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von 
> Håken Hveem
> Gesendet: Donnerstag, 20. November 2014 11:41
> An: hpsdr at lists.openhpsdr.org
> Betreff: [hpsdr] A idea
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Perhaps this is possible:
> One antenna connection per module,
> shared power bus.
> Possible shared communication bus.
> The system must run Linux for best stability. It must use a broadband internet connection,adsl or possible fiber as it is total immune to rfi etc. The user logs in with a password and username with ssh encryption,and can control at max 2 modules. The system must have good protection against file system corruption caused by power loss. The modules must have enough cooling to cope with the high duty cycle that some of the digital modes uses.
> List of modules possible,total:
> 2200M 135,7 kHz - 137,8 kH 100w
> 630M 472 kHz - 479 kHz 100 watt
> 160M 1810 kHz -  1850 kHz  100w
> 160M 1850 kHz - 2000 khz 10 w
> 80M 3500 kHz - 3800 khz 100w
> 60M 5260 kHz - 5410 kHz  100 w
> 40M 7000 kHz - 7200 kHz  100 w
> 30M 10100 kHz - 10150 kHz  100 w
> 20M 14000 kHz - 14350 kHz  100 w
> 17M 18068 kHz -18168 kHz 100 w
> 15M 21000 kHz- 21450 kHz 100 w
> 12M 24740 kHz- 24890 kHz  100 w
> 12M 24890 kHz -24990 kHz  100 w
> 10M 28000 kHz - 29700 kHz  100 w
> 6M 50 MHz - 52 MHz  100 w
> 4M 70,0625 MHz - 70,4625 MHz 100 w
> 2M 144 MHz - 146 MHz 100w
> 70CM 432 MHz - 438 MHz 30 kHz 100w
> 23 CM 1240 MHz - 1300 MHz 100 w
> 13CM 2300 MHz - 2450 MHz  100 w
>
> Why this system?
> The costs of equipment for a individual ham operator  and antenna limitations should justify a group-owned  remote operated system that can be expanded with modules and antennas,the increasing qrm from electronic apparatuses (plasma tvs,bad adsl routers etc) also tends to cause more and more problems. That's why a remotely placed system with a excellent qth should interest the members of a radio amateur group.
>
> LA1RMA
>
> --
> Håken Hveem
> Gnup/PGP key ID: 45793A72
>
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>

--
Håken Hveem
Gnup/PGP key ID: 45793A72

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