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CWNP CWDP-305 Exam - Topic 4 Question 6 Discussion

Actual exam question for CWNP's CWDP-305 exam
Question #: 6
Topic #: 4
[All CWDP-305 Questions]

What part of the 802.11n preamble is used by the receiver to estimate the spatially multiplexed signal channel? What mode is this used in?

Response:

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Suggested Answer: B

by Antonette at Jun 16, 2025, 09:15 PM

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Daniel
5 months ago
No way, HT-STF is used for estimating, right?
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Douglass
5 months ago
I thought it was just for Greenfield mode?
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Lonny
6 months ago
Wait, are we sure about the modes? Sounds off.
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Anissa
6 months ago
Agreed, HT-LTF is the way to go here!
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Eloisa
6 months ago
It's definitely the HT-LTF in Mixed and Greenfield modes!
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Darrin
6 months ago
I thought the HT-STF was important for channel estimation, but I can't remember if it applies to both modes or just one.
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Beula
7 months ago
I feel like the HT-LTF is used in both modes, but I might be mixing it up with another question I studied.
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Kelvin
7 months ago
I remember practicing a question about the HT-STF, but I can't recall if it was specifically for Mixed mode or not.
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Wilbert
7 months ago
I think the HT-LTF is what we need for estimating the channel, but I'm not sure if it's only in Greenfield mode or both modes.
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Basilia
7 months ago
Ugh, I'm drawing a blank on the 802.11n preamble details. I know we covered this in class, but I'm having trouble remembering the specifics. I'll have to make an educated guess on this one.
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Fausto
7 months ago
Okay, I've got this. The HT-LTF is used by the receiver to estimate the spatially multiplexed signal channel, and this is used in both the Mixed and Greenfield modes. I'm confident that option B is the correct answer.
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Sylvia
8 months ago
Hmm, I'm a bit unsure about this one. The preamble structure for 802.11n is something I've covered, but I can't quite recall which specific part is used for the channel estimation in the different modes. I'll have to think this through step-by-step.
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Elena
8 months ago
This question seems to be testing my knowledge of the 802.11n preamble structure and the different modes it's used in. I'll need to carefully review the details of the preamble and the Greenfield and Mixed modes to determine the correct answer.
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Glory
10 months ago
Haha, this is a tricky one! I bet the answer is hidden in the fine print somewhere. Time to put on my detective hat.
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Odelia
8 months ago
User 2: I agree, that sounds right. Let's go with that.
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Mari
9 months ago
User 1: I think it's C) HT-LTF in Greenfield mode only.
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Carmen
9 months ago
User 2: I agree, that sounds right. Let's go with that.
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Joanna
10 months ago
User 1: I think it's C) HT-LTF in Greenfield mode only.
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Ezekiel
10 months ago
Hmm, I was thinking it was HT-STF in both Mixed and Greenfield modes. Guess I need to review my 802.11n preamble structure again.
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Dick
9 months ago
User 2: It's actually HT-LTF in Greenfield mode only.
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Kenda
9 months ago
User 1: I thought it was HT-STF in both Mixed and Greenfield modes.
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Jules
11 months ago
I'm not sure, but I think it might be D) HT-STF in Mixed and Greenfield modes.
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Roosevelt
11 months ago
I agree with Ettie, because the receiver uses HT-LTF in Greenfield mode to estimate the spatially multiplexed signal channel.
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Ettie
11 months ago
I think the answer is C) HT-LTF in Greenfield mode only.
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Olen
12 months ago
I'm pretty sure it's HT-LTF in Mixed and Greenfield modes. Those long training fields are crucial for channel estimation, right?
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Mari
11 months ago
Definitely, HT-LTF in Mixed and Greenfield modes is crucial for the receiver to estimate the channel accurately.
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Louvenia
11 months ago
I think it's important to have those long training fields for accurate spatially multiplexed signal channel estimation.
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Roxane
11 months ago
Yes, you are correct. HT-LTF in Mixed and Greenfield modes is used for channel estimation.
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