5 votes

Stanford EE 261 HW6 Q1 - Sampling below Nyquist Rate

The expression $B_2 < f_s < 2B_1$. is only part of the correct answer. The full correct answer is: $${2B_2\over m+1} ≤ f_s ≤ {2B_1\over m}$$ where $m$ is any positive integer ensuring that $f_s ≥...
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4 votes
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Stanford EE 261 HW6 Q1 - Sampling below Nyquist Rate

No aliasing means that the original information of the continuous-time signal (or higher rate discrete-time signal) is still contained unambiguously in the sampled signal. The original signal can - at ...
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4 votes

FFT with High Time and Frequency Resolution

Time frequency resolution is a long debate in the DSP communities. But modern models has proved that the resolution isn't limited by the DFT because usually we know more about the signal but its ...
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2 votes
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Phase Spectrum 0 Phase

I was working on the zero-phase Ricker wavelet. Chances you were working on the "linear-phase" wavelet. Assuming a real input, zero-phase requires time symmetry, i.e. $x[-n] = x[n]$. If you ...
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What's the difference between male and female voice?

The main difference between female and make voice is the pitch range of the fundamental frequency (of all vowels and consonants that have a pitch). The difference is significant: it's on average a ...
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1 vote
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Confusion understanding Fourier series line spectra?

We probably all know that the Fourier Series Expansion will decompose an arbitrary waveform that is analytic over a time interval $T$ into a sum of infinite frequency components, discrete in the ...
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1 vote
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Shift of the signal spectrum to the desired frequency

There is no allowance for transition band between the passband of interest (5.5KHz to 6.5 KHz less a notch in the center) and the frequencies in aliasing zones to reject based on the translation ...
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