12.02.2014 Views

Radar System Engineering

Radar System Engineering

Radar System Engineering

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

636 MOVING-TARGET INDICATION [SEC. 16.4<br />

EEl<br />

I<br />

1<br />

Transmitter<br />

TR<br />

EEl<br />

I<br />

Transmitter<br />

TR<br />

(<br />

Reference<br />

signal<br />

‘ Echo signal<br />

Echo signal<br />

Locking<br />

I<br />

Stable r.f<br />

oscillator<br />

At<br />

trl<br />

Mixer<br />

LO<br />

Mixer<br />

Receiver<br />

t<br />

-%=<br />

(a)<br />

(b)<br />

FIG. 16.14 .—R-f locking, r-f addition. (a) R-f locking by transmitter, r-f addition.<br />

(b) R-f locking by oscillator, r-f addition.<br />

Modulator<br />

I Modulator 1<br />

1 I<br />

Cl<br />

Buffer<br />

Locking<br />

I<br />

Locking<br />

Stable Rf<br />

oscillator<br />

t<br />

!1<br />

Stable R+<br />

oscillator<br />

Mixer + LO - Mixer<br />

t<br />

Mixer + LO + Mixer<br />

I<br />

Echo signals<br />

Echo signak<br />

(a)<br />

(b)<br />

FIG. 16.15.—R-f locking, i-f addition. (a) R-f locking by transmitter, i-f addition.<br />

(b) R-f locking by oscillator,i-f addition.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!