Alexander Ratke, articles

Signal Effect of down-sampling to PSD from auto-correlation?
Effect of down-sampling to PSD from auto-correlation?
What is autocorrelation in signal processing? What is autocorrelation in signal processing?Autocorrelation, sometimes known as serial correlation in...
Sidebands What happens to sidebands when they enter negative frequencies?
What happens to sidebands when they enter negative frequencies?
What is the meaning of negative frequency in Fourier transform?What are the sideband frequencies?Do you need to have both sidebands in order to recei...
Signal Understanding the signal to noise ratio (SNR)
Understanding the signal to noise ratio (SNR)
What is a good SNR signal-to-noise ratio?How do you explain SNR?Is a higher or lower SNR better?How do you read SNR values? What is a good SNR signa...
System Classification of a system
Classification of a system
Systems are classified into the following categories: linear and Non-linear Systems. Time Variant and Time Invariant Systems. linear Time variant and ...
Sampling The baseband sampling frequency when the negative spectrum is considered
The baseband sampling frequency when the negative spectrum is considered
What should be the sampling frequency?What is the minimum sample frequency needed to reconstruct an analog signal?What is produced when the sampling ...
Signal Why does the bandwidth of a signal need to be half of the sampling rate? [duplicate]
Why does the bandwidth of a signal need to be half of the sampling rate? [duplicate]
How is bandwidth related to sampling rate?Why should your sampling rate be twice the maximum frequency of your signal?Why is it necessary to limit th...
Carrier Obtain carrier frequency of signal from its absolute magnitude
Obtain carrier frequency of signal from its absolute magnitude
What is meant by carrier frequency?What should be the carrier frequency?How do you choose a sampling frequency in FFT? What is meant by carrier freq...
Correlation Finding correlation coefficient of two dependent random variables
Finding correlation coefficient of two dependent random variables
How do you find the correlation coefficient of two random variables?What is the correlation of 2 independent random variables?How do you find the cor...
Autocorrelation Expected value and autocorrelation
Expected value and autocorrelation
What is autocorrelation value?What is the difference between autocorrelation and autocovariance?What does the autocorrelation function tell you?What ...