User Deve

24 votes

Accepted

Difference between Discrete Time Fourier Transform and Discrete Fourier Transform

answered May 29, 2014 at 11:09

17 votes

FFT of sine wave not coming as expected i.e single point

answered Apr 11, 2013 at 11:52

17 votes

Symmetry of real and imaginary parts in FFT

answered Apr 18, 2013 at 9:50

12 votes

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What is the difference between Lumped and Distributed systems?

answered May 24, 2013 at 8:22

9 votes

How is symbol synchronization with OFDM done?

answered Feb 2, 2013 at 14:48

8 votes

how do I calculate SNR of noisy signal?

answered Nov 2, 2012 at 8:30

8 votes

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How does averaging increase the Signal to Noise ratio?

answered Nov 15, 2014 at 12:35

8 votes

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Why is `fftfilt` (i.e. `fft` of both inputs, then element-wise multiplication, then `ifft`) faster than direct convolution?

answered Dec 13, 2013 at 8:45

8 votes

Nyquist Frequency Phase Shift

answered Jan 31, 2014 at 10:03

8 votes

Why not use zero-signal in digital transmission?

answered Oct 23, 2015 at 11:16

8 votes

Is $x(t) = \cos t + \sin\left(\frac{1}{2}t\right)$ a periodic signal?

answered Dec 11, 2015 at 10:46

8 votes

Fourier Transform Identities

answered Jun 5, 2017 at 12:26

7 votes

Hermitian symmetry in OFDM systems

answered May 26, 2014 at 11:21

6 votes

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Alamouti code after or before IFFT block in OFDM

answered May 28, 2014 at 15:21

6 votes

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Finding out modulation index and DC offset

answered Feb 3, 2013 at 9:59

5 votes

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FPS to Hertz in a camera

answered Nov 12, 2012 at 15:06

5 votes

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What can we deduce about variance when we are given the noise spectral density?

answered Feb 11, 2014 at 14:40

5 votes

Number of DFT (FFT) Points Required for a Specific Frequency Resolution for an Oversampled Signal

answered Aug 1, 2014 at 6:42

5 votes

Number of samples in one period of subcarrier after IFFT

answered Oct 22, 2015 at 8:38

4 votes

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Pilot symbols in IEEE 802.11a

answered May 28, 2015 at 15:47

4 votes

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OFDM violates sampling theorem

answered Dec 19, 2014 at 9:29

4 votes

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Memory requirements for FFT

answered Sep 5, 2014 at 15:22

4 votes

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IFFT and OFDM upconversion

answered Apr 16, 2014 at 13:30

4 votes

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What type of correlation is this equation?

answered Apr 23, 2014 at 17:25

4 votes

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Is it possible to transmit and/or receive multiple types of signals at the same time?

answered Jul 13, 2012 at 14:16

4 votes

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Power spectral density and SNR for AWGN

answered Apr 10, 2013 at 13:55

4 votes

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Bandwidth of a communication system

answered Jun 11, 2013 at 11:40

4 votes

Implementing FFT in Matlab

answered Sep 29, 2013 at 11:24

4 votes

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Reason of Fast Fourier and Inverse Fast Fourier

answered Nov 9, 2013 at 17:39

3 votes

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Need for Oversampling in OFDM and symbol time determination

answered Apr 30, 2013 at 9:47

Stack Exchange Network

112 Answers

Difference between Discrete Time Fourier Transform and Discrete Fourier Transform

FFT of sine wave not coming as expected i.e single point

Symmetry of real and imaginary parts in FFT

What is the difference between Lumped and Distributed systems?

How is symbol synchronization with OFDM done?

how do I calculate SNR of noisy signal?

How does averaging increase the Signal to Noise ratio?

Why is `fftfilt` (i.e. `fft` of both inputs, then element-wise multiplication, then `ifft`) faster than direct convolution?

Nyquist Frequency Phase Shift

Why not use zero-signal in digital transmission?

Is $x(t) = \cos t + \sin\left(\frac{1}{2}t\right)$ a periodic signal?

Fourier Transform Identities

Hermitian symmetry in OFDM systems

Alamouti code after or before IFFT block in OFDM

Finding out modulation index and DC offset

FPS to Hertz in a camera

What can we deduce about variance when we are given the noise spectral density?

Number of DFT (FFT) Points Required for a Specific Frequency Resolution for an Oversampled Signal

Number of samples in one period of subcarrier after IFFT

Pilot symbols in IEEE 802.11a

OFDM violates sampling theorem

Memory requirements for FFT

IFFT and OFDM upconversion

What type of correlation is this equation?

Is it possible to transmit and/or receive multiple types of signals at the same time?

Power spectral density and SNR for AWGN

Bandwidth of a communication system

Implementing FFT in Matlab

Reason of Fast Fourier and Inverse Fast Fourier

Need for Oversampling in OFDM and symbol time determination