What is correlation detection?
What is correlation detection?
[‚kär·ə′lā·shən di′tek·shən] (engineering) A method of detection of aircraft or space vehicles in which a signal is compared, point to point, with an internally generated reference. Also known as cross-correlation detection.
What is correlation in radar?
In radar signal processing, correlation is understood as the comparison between an unknown signal and a known reference signal, or more precisely: their degree of coincidence as a time shift function between these two signals.
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.
Which property is exhibited by the autocorrelation function of a complex valued signal?
Explanation: According to its properties autocorrelation is maximum at origin. Explanation: Autocorrelation function of a real valued signal is equal to the energy of the signal and auto-correlation function of the periodic signal is equal to the average power of the signal.
What is correlation process?
A useful way of visualising the discrete correlation process is in terms of the of two streams of numbers sliding along each other where at each location in the stream, the appropriate numbers are multiplied and the results added together.
What is cross-correlation detection?
In signal processing, cross-correlation is a measure of similarity of two series as a function of the displacement of one relative to the other. This is also known as a sliding dot product or sliding inner-product. It is commonly used for searching a long signal for a shorter, known feature.
Why matched filter receiver is used?
What is the advantage of using matched filter detection?
The matched filter is the most effective when the waveform of the signal to be detected is perfectly known and when the only interference present is white noise. The more flexible and robust technique of WT can be applied to on-site testing, where severe and more complex noise interference is present.
Which is better for avoiding jamming?
Explanation: Frequency hopping spread spectrum is better for avoiding jamming.
How is correlation used to detect a signal?
In this laboratory, we will examine an alternative detection method that addresses these concerns. It uses a com- putation called correlation to detect the presence of a signalwith a known form. In general, correlation measures the similarity between two signals. Using correlation for detection has significant applications.
Which is an example of the use of correlation?
In general, correlation measures the similarity between two signals. Using correlation for detection has significant applications. For instance, it allows several signals to be sent over a single communications channel simultaneously. It also allows the use of radar and sonar in noisy environments.
How is the Energy Center used in correlation detection?
The time correlation detection consists of a cycle of O (s) times. Therefore, the energy center where the composite features, such as target neighborhood of sequential image and area and concentration degree, are integrated is proposed to realize the multiframe motion correlation detection of the target.
Is the correlation coefficient the same as the coefficient of determination?
Not to be confused with Coefficient of determination. In statistics, the Pearson correlation coefficient ( PCC, pronounced / ˈpɪərsən / ), also referred to as Pearson’s r, the Pearson product-moment correlation coefficient ( PPMCC) or the bivariate correlation, is a measure of the linear correlation between two variables X and Y.