Timeline for What's the relation between the sampling rate and FFT size in OFDM
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Jul 27, 2018 at 11:00 | vote | accept | New_student | ||
| Jul 27, 2018 at 10:57 | comment | added | New_student | @Zeyad_Zeyad .. thank you so much .. your answer is really useful. | |
| Jul 27, 2018 at 5:53 | answer | added | user35336 | timeline score: 2 | |
| Jul 27, 2018 at 5:19 | comment | added | Zeyad_Zeyad | @MarcusMüller .. It's not allowed to evaluate people if they understand or not understand. they are here to learn and help each other. I've seen some comments for you where you evaluate people themselves by negative feedback. if they understand well, they won't come here to ask and try to understand. Eng. Badr, Keep going on, | |
| Jul 27, 2018 at 5:16 | comment | added | Zeyad_Zeyad | Hello .. So you question is there relation between sampling rate and FFT size. Yes, there is, Let s be a data vector of length N. When oversampling is not used, the transmitted signal is x=F^H s where F is the N x N DFT matrix whose (k,l)th entry is exp(-j2¥pi k l /N). When oversampling is used, the transmitted signal is Fp^H s where Fp is the pN x N DFT matrix and p is the oversampling factor.Then, what happens if F is used is used for demodulation? .. | |
| Jul 27, 2018 at 5:02 | history | edited | New_student | CC BY-SA 4.0 |
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| Jul 27, 2018 at 5:02 | comment | added | New_student | leave the "Oversampling Pop Up Menu" and answer about the question in the fist part. Is there relationship between Sampling rate and FFT size? For example, if we downsample or oversample the received signal, Should we decrease or increase the FFT size accordingly? | |
| Jul 26, 2018 at 19:54 | review | Close votes | |||
| Jul 30, 2018 at 15:50 | |||||
| Jul 26, 2018 at 19:35 | comment | added | Marcus Müller | I don't think you fully understand the basics of OFDM – the FFT size is exactly the number of subcarriers your OFDM system has. Nothing ever changes that. And "Oversampling Pop Up Menu" is something that has to do with a specific software or so? You might be forgetting that we don't sit in front of the same computer using the same software as you... | |
| Jul 26, 2018 at 16:11 | history | edited | New_student | CC BY-SA 4.0 |
added 573 characters in body
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| Jul 26, 2018 at 14:28 | history | asked | New_student | CC BY-SA 4.0 |