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List:       gnuradio-discuss
Subject:    [Discuss-gnuradio] Using a Trigger Event to Process Subset of Samples in the Data Stream
From:       Mark Gannet <mgannet () gmail ! com>
Date:       2019-01-23 17:23:30
Message-ID: CABL+oDbngNThOLoL10ar-k++GUp+Bc5Ga8bx__0Eg3ar01to+Q () mail ! gmail ! com
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Hello,

I'm using a channel on an x310 to sample the analog receiver on a radar
system and store the data continuously on a host PC running CentOS 7.  The
other channel on the x310 is used to collect timing signals (like a
transmit trigger signal) via the GPIO header on a basic Rx daughterboard
(with a modified FPGA load)

I'd like to delay a fixed amount of time (say 2 ms) from the trigger signal
on the GPIO to process a subset (about 100 us) of the receive signal and
calculate RMS power during that interval.  I'd like to do this on the Host
PC and stream out the result as a UDP message.

My question is this:  What is my best bet in manipulating the data stream
from the USRP block so that I can calculate the RMS power in that window of
time delayed from the trigger?  Stream to vector?  Signal probe vector
(I've read these are slow)?  ZeroMQ?

Thanks,
Mark

[Attachment #5 (text/html)]

<div dir="ltr">Hello,<div><br></div><div>I&#39;m using a channel on an x310 to sample \
the analog receiver on a radar system and store the data continuously on a host PC \
running CentOS 7.   The other channel on the x310 is used to collect timing signals \
(like a transmit trigger signal) via the GPIO header on a basic Rx daughterboard \
(with a modified FPGA load)</div><div><br></div><div>I&#39;d like to delay a fixed \
amount of time (say 2 ms) from the trigger signal on the GPIO to process a subset \
(about 100 us) of the receive signal and calculate RMS power during that interval.   \
I&#39;d like to do this on the Host PC and stream out the result as a UDP \
message.</div><div><br></div><div>My question is this:   What is my best bet in \
manipulating the data stream from the USRP block so that I can calculate the RMS \
power in that window of time delayed from the trigger?   Stream to vector?   Signal \
probe vector (I&#39;ve read these are slow)?   \
ZeroMQ?</div><div><br></div><div>Thanks,<br>Mark</div></div>



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