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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:

AHT-STF in Greenfield mode only

BHT-LTF in Mixed and Greenfield modes

CHT-LTF in Greenfield mode only

DHT-STF in Mixed and Greenfield modes

Show Suggested Answer

Suggested Answer: B

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

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Daniel

7 months ago

No way, HT-STF is used for estimating, right?

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Douglass

7 months ago

I thought it was just for Greenfield mode?

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Lonny

7 months ago

Wait, are we sure about the modes? Sounds off.

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Anissa

7 months ago

Agreed, HT-LTF is the way to go here!

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Eloisa

8 months ago

It's definitely the HT-LTF in Mixed and Greenfield modes!

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Darrin

8 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

8 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

8 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

9 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

9 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

9 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

9 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

9 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

12 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

10 months ago

User 2: I agree, that sounds right. Let's go with that.

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Mari

11 months ago

User 1: I think it's C) HT-LTF in Greenfield mode only.

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Carmen

11 months ago

User 2: I agree, that sounds right. Let's go with that.

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Joanna

11 months ago

User 1: I think it's C) HT-LTF in Greenfield mode only.

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Ezekiel

12 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

11 months ago

User 2: It's actually HT-LTF in Greenfield mode only.

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Kenda

11 months ago

User 1: I thought it was HT-STF in both Mixed and Greenfield modes.

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Jules

1 year ago

I'm not sure, but I think it might be D) HT-STF in Mixed and Greenfield modes.

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Roosevelt

1 year 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

1 year ago

I think the answer is C) HT-LTF in Greenfield mode only.

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Olen

1 year 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

1 year ago

Definitely, HT-LTF in Mixed and Greenfield modes is crucial for the receiver to estimate the channel accurately.

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Louvenia

1 year ago

I think it's important to have those long training fields for accurate spatially multiplexed signal channel estimation.

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Roxane

1 year ago

Yes, you are correct. HT-LTF in Mixed and Greenfield modes is used for channel estimation.

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