HI
> On Oct 9, 2017, at 8:49 PM, jimlux wrote:
>
> On 10/9/17 8:02 AM, Bob kb8tq wrote:
>> Hi
>> Pick a couple of local broadcast stations and record them. That will give
>> you a baseline
>> for each of the parameters you are after in real time. They *will* drift.
>> Past that, I’d go with a
On 10/9/17 8:02 AM, Bob kb8tq wrote:
Hi
Pick a couple of local broadcast stations and record them. That will give you a
baseline
for each of the parameters you are after in real time. They *will* drift.
Past that, I’d go with a sweep of each node before installation. That will give
you the
fr
On 10/9/17 8:00 AM, Mattia Rizzi wrote:
Hi,
I did something similar when I had to deliver synchronization over IEEE
802.15.4-CSS (Chirp spread spectrum).
If you have SDR on both ends (TX & RX), you can use complex chirp signals
and then cross-correlation at RX. Just be sure that the multi-path is
On 10/9/17 9:58 AM, David Witten wrote:
Jim,
If I understand what you are attempting (I may well not), you might
consider the approach taken here:
https://github.com/tejeez/rtl_coherent
that is where you have a common clock distributed to the RTLs
"A single 28.8 MHz reference clock is distrib
Jim,
If I understand what you are attempting (I may well not), you might
consider the approach taken here:
https://github.com/tejeez/rtl_coherent
and here:
https://github.com/tejeez/rtl_coherent/blob/master/hardware/simple/README.md
or order a noise-source and antenna switches from here:
http
Hi,
I did something similar when I had to deliver synchronization over IEEE
802.15.4-CSS (Chirp spread spectrum).
If you have SDR on both ends (TX & RX), you can use complex chirp signals
and then cross-correlation at RX. Just be sure that the multi-path is not
killing you (i.e. the cross-correlati
Hi
Pick a couple of local broadcast stations and record them. That will give you a
baseline
for each of the parameters you are after in real time. They *will* drift.
Past that, I’d go with a sweep of each node before installation. That will give
you the
frequency response and (to some degree
I'm trying to come up with a relatively simple scheme to calibrate an HF
antenna array - I've got a bunch of RTL-SDRs operating as a distributed
array spread over a few 10s of meters.
The things I want to do are:
a) determine the phase/time offset between stations relative to other nodes
b) det
