Discuss CWNP CWISA-103 Exam Topic 3 Question 14

How does OFDMA differ from OFDM?

ASubcarriers of OFDMA can contain data destined for a different receiver

BOFDMA offers greater range by using multiple channels at once

COFDMA allows multiple devices to transmit simultaneously on the same frequency

DOFDMA uses multiple radios to achieve higher throughput

Suggested Answer: C

OFDM vs. OFDMA:

OFDM (Orthogonal Frequency-Division Multiplexing):Divides a channel into multiple subcarriers for data transmission.

OFDMA (Orthogonal Frequency-Division Multiple Access):Extends OFDM by allowing multiple users to share subcarriers simultaneously, improving efficiency and spectral utilization.

Reference

OFDM:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

OFDMA:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiple_access

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17 comments · newest first

Tammy 23 days ago

True, but C really stands out for me. Multiple transmissions are key!

Louvenia 28 days ago

I like option B as well. Greater range is a big plus.

Shelton 1 month ago

Right! That makes it versatile for various connections.

Lonna 1 month ago

I’m leaning towards option A too. Different receivers can share subcarriers.

Billye 1 month ago

Definitely! It’s all about better resource allocation.

Lino 2 months ago

I feel like OFDMA is more advanced than OFDM.

Luke 2 months ago

Yeah, I agree! That's option C. It’s efficient for many users.

Bambi 2 months ago

I think OFDMA allows multiple devices to transmit simultaneously.

Lindy 2 months ago

Yes, OFDMA allows simultaneous transmissions, which is awesome!

Ngoc 2 months ago

I thought OFDM was already efficient enough. Why the need for OFDMA?

Ressie 2 months ago

Wait, does OFDMA really use multiple radios? Sounds complicated.

Katheryn 3 months ago

Totally agree, that's a game changer!

Vivan 3 months ago

OFDMA lets different receivers share subcarriers, right?

Cammy 3 months ago

I’m a bit confused about the range aspect. I thought OFDMA just improved capacity, not necessarily range. Did we cover that?

Destiny 3 months ago

I feel like I saw something about OFDMA using subcarriers for different receivers in a practice test, but I can't recall the details.

Diego 3 months ago

I remember practicing a question about how OFDMA improves efficiency by letting different users transmit at the same time. So, I think option C sounds right.

Erinn 4 months ago

I think OFDMA is about allowing multiple users to share the same channel, but I'm not entirely sure how that differs from OFDM.

CWNP CWISA-103 Exam - Topic 3 Question 14 Discussion