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List:       usrp-users
Subject:    [USRP-users] Phase Alignment
From:       Changlai Du via USRP-users <usrp-users () lists ! ettus ! com>
Date:       2015-07-29 15:42:47
Message-ID: CAJJYgsaky_YKXEGU2TET2zoBCE0kCGQ=nfi=o10Z-7BBb9+3JA () mail ! gmail ! com
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Hi all,

I'm working on a direction finding project and I'm asking for help on the
phase alignment step.
My configurations are:
4 * N200+XCVR2450 as the receiver array
1 * N200 + SBX as the reference TX
1 * N200 + SBX as the target transmiter
GnuRadio and Matlab code of MUSIC algorithm

The reference TX are connect to receivers' RF2 using SMA splitter
4 receivers have been time and frequency synchronized.

I'm not familiar with signal processing. I've read a lot of posts in the
mailing list and really didn't get how to do phase alignment.
Can anybody give me a hint on how to set the reference TX parameters and
how to do "post-processing phase alignment based on the offsets and gains
observed from the known reference signal"?
Thank you!


-- 
Best regards!
Charlie

[Attachment #5 (text/html)]

<div dir="ltr"><div>Hi all,</div><div><br></div><div>I&#39;m working on a direction \
finding project and I&#39;m asking for help on the phase alignment step.</div><div>My \
configurations are:</div><div>4 * N200+XCVR2450 as the receiver array</div><div>1 * \
N200 + SBX as the reference TX</div><div>1 * N200 + SBX as the target \
transmiter</div><div>GnuRadio and Matlab code of MUSIC \
algorithm</div><div><br></div><div>The reference TX are connect to receivers&#39; RF2 \
using SMA splitter<br></div><div>4 receivers have been time and frequency \
synchronized.</div><div><br></div><div>I&#39;m not familiar with signal processing. \
I&#39;ve read a lot of posts in the mailing list and really didn&#39;t get how to do \
phase alignment.</div><div>Can anybody give me a hint on how to set the reference TX \
parameters and how to do &quot;post-processing phase alignment based on the offsets \
and gains observed from the known reference signal&quot;?</div><div>Thank \
you!</div><br clear="all"><div><br></div>-- <br><div>Best regards!<br>Charlie         \
<br></div> </div>



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