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Results tagged with ofdm
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user 13309
OFDM stands for Orthogonal, Frequency-Division Multiplexing.
3
votes
Plotting frequency spectrum for a signal with 20MHz bandwidth and sampling frequency of 12.5GHz
Your fundamental limitation is the (comparatively) short window length of $M=400,000$ samples, at such a prohibitively high sampling frequency of $12.5$ GHz. This will roughly yield a few hundred kHz …
- 28.4k
2
votes
Accepted
Upsampling and Downsampling using IFFT and FFT (DFT Based Resampling)
Given a time domain signal $x_1[n]$ of length $N$ and its $N$-point DFT $X_1[k]$, If you pad $M$ zeros to the end of $x_1[n]$ and then take ($N+M$) point-DFT of it, this will give you an interpolated …
- 28.4k
1
vote
Bandlimiting and OFDM spectrum - what is considered "bandlimited"?
Then the OFDM is not perfectly orthogonal. Yet we are dealing with practical definition which is indeed extremely satisfying up to accepted error bounds. …
- 28.4k
1
vote
Accepted
Large spike at beginning of signal after applying Bandpass filter
What you see as a spike at the beginning of the filter output is the impulse response of the bandpass filter itself. This would happen as a transient effect and it will be more pronounced if the filte …
- 28.4k