Howtosignalprocessing
- What does a matched filter do?
- What does filter () do in Matlab?
- Is a matched filter autocorrelation?
- How does matched filter increases SNR?
What does a matched filter do?
The matched filter is the optimal linear filter for maximizing the signal-to-noise ratio (SNR) in the presence of additive stochastic noise. Matched filters are commonly used in radar, in which a known signal is sent out, and the reflected signal is examined for common elements of the out-going signal.
What does filter () do in Matlab?
Filters are data processing techniques that can smooth out high-frequency fluctuations in data or remove periodic trends of a specific frequency from data. In MATLAB®, the filter function filters a vector of data x according to the following difference equation, which describes a tapped delay-line filter.
Is a matched filter autocorrelation?
In a simple radar ranging system, if the data contains a single “target,” the output of the matched filter (not including noise) is the autocorrelation function of the transmitted waveform, time-shifted to where the target is located in time.
How does matched filter increases SNR?
The matched filter improves the SNR by reducing the noise's spectral bandwidth to that of the wavelet, and in addition, reduces the noise within the wavelet's bandwidth by the shape of the wavelet's spectrum.
