Agree with all of Marcus' comments. However, the 150 to 326 Mbps
requirement may be quite difficult. To put things in perspective, my run
of the mill 3 GHz E5-1607 Xeon x86 processor can just barely decode
16QAM DVB-T at 16 Mbps. You'll probably need a high-end CPU with as many
cores as you can afford.
On the DVB-T receiver, the most amount of CPU cycles are spent on the
Viterbi decoder which is why I asked what the FEC is. If you need
LDPC/BCH, performance is even more difficult to achieve.
Ron
On 08/23/2016 06:52 AM, Marcus Müller wrote:
Hi Ihab,
1) Frequency range: 1.5 - 38 GHz
since the B205 mini only goes up to 6 GHz, you're bound to use an
external mixer. The device you chose for that will completely depend
on your specific application's needs. Also note that finding something
that works as well at 1.5 GHz as it does on 38 GHz is probably pretty
expensive, so and finding antennas that work across that range isn't
trivial, either. So I'd recommend that, at least for a first
prototype, you restrict yourself to a smaller frequency range. If you
stay below 6GHz, the B205 can do that on its own
2) Bandwidth range : 2 - 56 MHz
The B205 mini can definitely dot 56 MHz of bandwidth; the question is
whether your PC can process them fast enough and whether your USB3
controller can sustain these rates.
3) Modulation : Qpsk - 256 QAM
Well, that's just a question of software that you'll write :)
4) Data rate range : 150Mbit/s - 326Mbit/s.
That sounds doable, considering the only limit here is Shannon's
channel capacity and your ability to write good software including
synchronizers, equalizers, channel codes etc.
5) Error correction method : i thinks it is FEC.
Most definitely you'd want some channel coding.
Best regards,
Marcus
On 23.08.2016 15:34, Ihab Zine wrote:
Hi Ron,
1) Frequency range: 1.5 - 38 GHz
2) Bandwidth range : 2 - 56 MHz
3) Modulation : Qpsk - 256 QAM
4) Data rate range : 150Mbit/s - 326Mbit/s.
5) Error correction method : i thinks it is FEC.
Ihab
On 22 August 2016 at 12:33, Ihab Zine <[email protected]
<mailto:[email protected]>> wrote:
Hi All,
I'm working on a project using GnuRadio And USRP 205 mini, i'm at
the stage where i need to demodulate a microwave link signal.
Anyone has an experience with Microwave link or tried to do
something similar? Is it possiable to do it in gnuradio? or is
there another approaches to do it?
I'd appreciate any information you could give me.
Thanks
Ihab
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