OFDMA
E494316
OFDMA (Orthogonal Frequency Division Multiple Access) is a multi-user version of OFDM that divides subcarriers among multiple users to enable efficient, high-capacity wireless communication in systems like LTE and WiMAX.
All labels observed (2)
| Label | Occurrences |
|---|---|
| OFDMA canonical | 1 |
| Orthogonal Frequency Division Multiple Access | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5103179 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: OFDMA Context triple: [OFDM, relatedTo, OFDMA]
-
A.
OFDM
OFDM (Orthogonal Frequency-Division Multiplexing) is a digital multi-carrier modulation technique that splits data across many closely spaced orthogonal subcarriers to improve robustness against interference and multipath fading in wireless and wired communication systems.
-
B.
LTE-Advanced
LTE-Advanced is an enhanced 4G mobile communication standard that significantly improves data rates, capacity, and network efficiency over earlier LTE systems.
-
C.
LTE-Advanced Pro
LTE-Advanced Pro is an enhanced 4G mobile broadband technology that bridges LTE-Advanced and 5G by offering higher data rates, improved capacity, and advanced features such as carrier aggregation and enhanced MIMO.
-
D.
IEEE 802.17
IEEE 802.17 is a networking standard that defines resilient packet ring (RPR) technology for efficient, high-speed data transport in metropolitan area networks.
-
E.
IEEE 802.16
IEEE 802.16 is a family of broadband wireless access standards, commonly associated with WiMAX, that defines high-speed wireless metropolitan area networks.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: OFDMA Target entity description: OFDMA (Orthogonal Frequency Division Multiple Access) is a multi-user version of OFDM that divides subcarriers among multiple users to enable efficient, high-capacity wireless communication in systems like LTE and WiMAX.
-
A.
OFDM
OFDM (Orthogonal Frequency-Division Multiplexing) is a digital multi-carrier modulation technique that splits data across many closely spaced orthogonal subcarriers to improve robustness against interference and multipath fading in wireless and wired communication systems.
-
B.
LTE-Advanced
LTE-Advanced is an enhanced 4G mobile communication standard that significantly improves data rates, capacity, and network efficiency over earlier LTE systems.
-
C.
LTE-Advanced Pro
LTE-Advanced Pro is an enhanced 4G mobile broadband technology that bridges LTE-Advanced and 5G by offering higher data rates, improved capacity, and advanced features such as carrier aggregation and enhanced MIMO.
-
D.
IEEE 802.17
IEEE 802.17 is a networking standard that defines resilient packet ring (RPR) technology for efficient, high-speed data transport in metropolitan area networks.
-
E.
IEEE 802.16
IEEE 802.16 is a family of broadband wireless access standards, commonly associated with WiMAX, that defines high-speed wireless metropolitan area networks.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
multiple access scheme
ⓘ
multi‑user version of OFDM ⓘ radio access technology ⓘ |
| allocates | subcarriers to different users ⓘ |
| appliedIn |
Wi‑Fi variants using OFDMA (e.g., IEEE 802.11ax)
ⓘ
broadband wireless access systems ⓘ cellular networks ⓘ fixed wireless access ⓘ |
| basedOn | OFDM NERFINISHED ⓘ |
| canUse | pilot subcarriers for channel estimation ⓘ |
| contrastedWith |
CDMA
NERFINISHED
ⓘ
FDMA NERFINISHED ⓘ SC‑FDMA NERFINISHED ⓘ TDMA ⓘ |
| enables |
frequency‑selective scheduling
ⓘ
high spectral efficiency ⓘ high system capacity ⓘ multiuser diversity ⓘ resource block‑based allocation ⓘ |
| fullName | Orthogonal Frequency Division Multiple Access NERFINISHED ⓘ |
| hasFeature |
fine‑grained subcarrier granularity
ⓘ
flexible bandwidth allocation ⓘ robustness to frequency‑selective fading ⓘ support for MIMO ⓘ support for beamforming ⓘ support for heterogeneous traffic types ⓘ |
| improves | cell throughput compared to single‑user OFDM scheduling ⓘ |
| requires |
accurate channel estimation
ⓘ
tight synchronization among users ⓘ |
| standardizedBy |
3GPP
NERFINISHED
ⓘ
IEEE NERFINISHED ⓘ |
| supports |
QoS‑aware scheduling
ⓘ
adaptive modulation and coding ⓘ dynamic subcarrier allocation ⓘ frequency‑domain multiple access ⓘ multiple users simultaneously ⓘ time‑frequency resource allocation ⓘ uplink and downlink multiuser access ⓘ |
| usedIn |
3GPP LTE‑Advanced
NERFINISHED
ⓘ
5G NR downlink (as CP‑OFDM multi‑user access) ⓘ IEEE 802.16e NERFINISHED ⓘ IEEE 802.16m NERFINISHED ⓘ LTE downlink ⓘ WiMAX NERFINISHED ⓘ |
| uses |
IFFT/FFT processing
ⓘ
cyclic prefix ⓘ orthogonal subcarriers ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: OFDMA Description of subject: OFDMA (Orthogonal Frequency Division Multiple Access) is a multi-user version of OFDM that divides subcarriers among multiple users to enable efficient, high-capacity wireless communication in systems like LTE and WiMAX.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Orthogonal Frequency Division Multiple Access