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Deve's user avatar
Deve's user avatar
Deve's user avatar
Deve
  • Member for 11 years, 11 months
  • Last seen more than a month ago
24 votes
Accepted

Difference between Discrete Time Fourier Transform and Discrete Fourier Transform

17 votes

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

17 votes

Symmetry of real and imaginary parts in FFT

12 votes
Accepted

What is the difference between Lumped and Distributed systems?

9 votes

How is symbol synchronization with OFDM done?

8 votes

how do I calculate SNR of noisy signal?

8 votes
Accepted

How does averaging increase the Signal to Noise ratio?

8 votes
Accepted

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

8 votes

Nyquist Frequency Phase Shift

8 votes

Why not use zero-signal in digital transmission?

8 votes

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

8 votes

Fourier Transform Identities

7 votes

Hermitian symmetry in OFDM systems

6 votes
Accepted

Alamouti code after or before IFFT block in OFDM

6 votes
Accepted

Finding out modulation index and DC offset

5 votes
Accepted

FPS to Hertz in a camera

5 votes
Accepted

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

5 votes

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

5 votes

Number of samples in one period of subcarrier after IFFT

4 votes
Accepted

Pilot symbols in IEEE 802.11a

4 votes
Accepted

OFDM violates sampling theorem

4 votes
Accepted

Memory requirements for FFT

4 votes
Accepted

IFFT and OFDM upconversion

4 votes
Accepted

What type of correlation is this equation?

4 votes
Accepted

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

4 votes
Accepted

Power spectral density and SNR for AWGN

4 votes
Accepted

Bandwidth of a communication system

4 votes

Implementing FFT in Matlab

4 votes
Accepted

Reason of Fast Fourier and Inverse Fast Fourier

3 votes
Accepted

Need for Oversampling in OFDM and symbol time determination