On 21/05/2024 20:24, Hamid Niknami via USRP-users wrote:
Hi,
I am very new to SDR. I need a low cost solution to record all the
interferences in the 100MHz band of the 2.4GHz ISM band (created by
multiple WiFi and Bluetooth devices) and then play it back to emulate
the interference. I do not need to decode those signals. I am thinking
of using B200 for down converting to base band, recording on a SSD and
then playing back the recorded signal using the B200 for upconverting
to 2.4GHz. Considering the fact that B200 cannot cover the whole
100MHz BW, I am thinking of using three B200 with synchronized
triggers, each set to a different band.
A few questions:
- Will such a scheme work?
- If yes, is there any GNU Radio Flow graph readily available for it?
- If yes, what issues/headaches shall I expect to be ready to deal with?
- Can multiple B200 be programmed to work in sync? If yes, what is the
recommended source for generating the synchronization pulse? (another
B200?) Any schematic for the needed HW connections for synchronization?
- If the above approach is not going to work, what other low cost
solution do you suggest?
Thanks.
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Depends on what you mean by "synchronization". If you mean "OK, B200s,
please all start recording now", that is easily
accomplished using timed commands, and an initial setup that sets
their timestamp clocks to the same value using
a 1PPS input.
IF you need all B200 devices to be mutual *phase coherent* with one
another, that's considerably more challenging.
Recording 100MHz of bandwidth on a single (cheap, it sounds like) PC is
also going to be challenging. Even if you only record
8-bit samples, that's 200Mbyte/second.
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