Complex Matched Filter

1. What is meant by matched filter?
2. What is the difference between matched filter and optimum filter?
3. Is the matched filter linear or non linear?
4. What is the advantage of using matched filter detection?

What is meant by matched filter?

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 is the difference between matched filter and optimum filter?

Normally matched filter is used for single wave form such as radar while correlation filters are designed to optimize SNR at the output. Both are called optimum filters in terms of SNR at the output.

Is the matched filter linear or non linear?

Abstract. Matched filters are the optimal linear filters for signal detection under linear channel and white noise conditions. Their optimality is guaranteed in the additive white Gaussian noise channel due to the sufficiency of second order statistics.

What is the advantage of using matched filter detection?

2 Matched filter detection method. The matched filter (MF) technique is an optimum method to sense availability of spectrum since the MF can maximize the SNR even if there is additive white Gaussian noise (AWGN). This feature is accomplished via correlation process inherent of the method.