2. Remote imaging
2.1 Focusing through matched filtering
As shown previously, the signal backscattered by an environment can be written as a sum, discrete or continuous, of delayed and weighted replicas of the transmitted signal.
In the discrete case, the useful part of the received signal can be expressed by convolution as the response of a linear filter with impulse response u (τ) subjected to a series of excitations:
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Remote imaging
Two-dimensional imaging
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