SC-FDMA
E495270
SC-FDMA (Single-Carrier Frequency Division Multiple Access) is a multi-carrier transmission scheme used primarily in LTE uplink that combines single-carrier characteristics with frequency-domain equalization to achieve lower peak-to-average power ratio than OFDM.
All labels observed (9)
| Label | Occurrences |
|---|---|
| DFT-spread OFDM | 2 |
| SC-FDMA canonical | 2 |
| Single-Carrier Frequency Division Multiple Access | 2 |
| DFT-S-OFDM | 1 |
| PUCCH | 1 |
| SC-FDE (Single-Carrier with Frequency-Domain Equalization) | 1 |
| SC-FDMA-based LTE uplink | 1 |
| SC‑FDMA | 1 |
| Single-Carrier DFT-Spread OFDM | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5103180 — 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: SC-FDMA Context triple: [OFDM, relatedTo, SC-FDMA]
-
A.
OFDMA
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.
-
B.
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.
-
C.
LTE-Advanced
LTE-Advanced is an enhanced 4G mobile communication standard that significantly improves data rates, capacity, and network efficiency over earlier LTE systems.
-
D.
LTE
LTE (Long Term Evolution) is a high-speed wireless communication standard for mobile devices and data terminals, widely used as the foundation of 4G cellular networks.
-
E.
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.
- 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: SC-FDMA Target entity description: SC-FDMA (Single-Carrier Frequency Division Multiple Access) is a multi-carrier transmission scheme used primarily in LTE uplink that combines single-carrier characteristics with frequency-domain equalization to achieve lower peak-to-average power ratio than OFDM.
-
A.
OFDMA
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.
-
B.
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.
-
C.
LTE-Advanced
LTE-Advanced is an enhanced 4G mobile communication standard that significantly improves data rates, capacity, and network efficiency over earlier LTE systems.
-
D.
LTE
LTE (Long Term Evolution) is a high-speed wireless communication standard for mobile devices and data terminals, widely used as the foundation of 4G cellular networks.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
multi-carrier modulation scheme
ⓘ
multiple access scheme ⓘ uplink transmission scheme ⓘ |
| abbreviationOf |
Single-Carrier Frequency Division Multiple Access
ⓘ
linked to:
SC-FDMA
|
| advantageOver |
OFDM in PAPR performance
ⓘ
OFDM in uplink power efficiency ⓘ |
| alsoKnownAs |
DFT-S-OFDM
ⓘ
linked to:
SC-FDMA
DFT-spread OFDM ⓘ
linked to:
SC-FDMA
Single-Carrier DFT-Spread OFDM ⓘ
linked to:
SC-FDMA
|
| appliedIn |
mobile broadband services
ⓘ
packet-switched data transmission ⓘ |
| basedOn |
DFT-spread OFDM
ⓘ
linked to:
SC-FDMA
|
| belongsTo | OFDMA-based systems family ⓘ |
| comparedTo | OFDM ⓘ |
| designedFor | uplink transmission from user equipment to base station ⓘ |
| enables |
extended battery life in mobile devices
ⓘ
use of power-efficient RF power amplifiers in user equipment ⓘ |
| fullName |
Single-Carrier Frequency Division Multiple Access
ⓘ
linked to:
SC-FDMA
|
| hasGoal |
improve power amplifier efficiency
ⓘ
maintain OFDM-like frequency-domain flexibility ⓘ reduce uplink PAPR ⓘ |
| hasProperty |
frequency-domain equalization
ⓘ
low peak-to-average power ratio ⓘ lower PAPR than OFDM ⓘ multi-user access capability ⓘ robustness to frequency-selective fading ⓘ single-carrier characteristics ⓘ |
| operatesIn | frequency-selective channels ⓘ |
| relatedTo |
FDMA
ⓘ
OFDMA ⓘ SC-FDE (Single-Carrier with Frequency-Domain Equalization) ⓘ
linked to:
SC-FDMA
|
| requires |
channel estimation at receiver
ⓘ
cyclic prefix ⓘ |
| standardizedIn |
3GPP LTE Release 8
ⓘ
linked to:
3GPP Release 8
3GPP TS 36.211 ⓘ |
| supports |
distributed subcarrier mapping
ⓘ
interleaved FDMA (IFDMA) ⓘ localized FDMA (LFDMA) ⓘ localized subcarrier mapping ⓘ |
| usedBy |
LTE eNodeB receivers
ⓘ
LTE user equipment ⓘ |
| usedIn |
3GPP LTE
ⓘ
linked to:
LTE
4G mobile communication systems ⓘ E-UTRA uplink ⓘ LTE uplink ⓘ |
| uses | cyclic prefix for combating inter-symbol interference ⓘ |
| usesDomain | frequency domain equalization ⓘ |
| usesTransform |
Discrete Fourier Transform
ⓘ
linked to:
Fourier transform
Inverse Fast Fourier Transform ⓘ
linked to:
Fourier inversion theorem
|
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: SC-FDMA Description of subject: SC-FDMA (Single-Carrier Frequency Division Multiple Access) is a multi-carrier transmission scheme used primarily in LTE uplink that combines single-carrier characteristics with frequency-domain equalization to achieve lower peak-to-average power ratio than OFDM.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA
linked to: SC-FDMA