Digital Array Radar Technology for MPAR
Digital Array Radar Technology for MPAR
Digital Array Radar Technology for MPAR
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Adaptability<br />
1101101010010…<br />
0110010001011…<br />
• Principle of operation:<br />
– Use receivers as built-in vector signal analyzers<br />
– Monitor transmit-receive coupling pair signals<br />
• Applications:<br />
– <strong>Array</strong> self-calibration and calibration monitoring<br />
– Built-in/automatic I/Q imbalance correction<br />
• Example:<br />
– Denote initial (complex) coupling to n th receiver from the m th transmitter as C mn<br />
– After array has been fielded, make the same recordings (C’ mn ), <strong>for</strong>ming the<br />
matrix K:<br />
C '<br />
mn<br />
T<br />
m<br />
R<br />
n<br />
C<br />
mn<br />
K<br />
mn<br />
C<br />
C<br />
'<br />
mn<br />
mn<br />
T<br />
m<br />
R<br />
n<br />
T m = error from digital signal to V m on Tx.<br />
R n = error from V n to digital signal on Rx.<br />
– Use this matrix to estimate errors in the array (see example )<br />
5/2/2011<br />
38
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