FDD
E123440
FDD (Frequency Division Duplex) is a communication method that separates uplink and downlink signals onto different frequency bands to enable simultaneous two-way wireless transmission.
All labels observed (3)
| Label | Occurrences |
|---|---|
| FDD canonical | 1 |
| Frequency Division Duplex | 1 |
| UMTS FDD | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1077302 — 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: FDD Context triple: [UMTS, supportsDuplexMode, FDD]
-
A.
DDF
DDF is the commonly used abbreviation for the Dicastery for the Doctrine of the Faith, the Vatican department responsible for promoting and safeguarding Catholic doctrine.
-
B.
FFC
FFC is the commonly used abbreviation for Falkirk Football Club, a professional Scottish football team based in Falkirk.
-
C.
F.D.
F.D. is the standard abbreviation of the Latin title "Fidei Defensor," historically used by English and later British monarchs to denote their role as "Defender of the Faith."
-
D.
DDC
DDC is a widely used library classification system that organizes books and other materials into numbered subject categories for easy retrieval.
-
E.
FEC
FEC is the independent U.S. regulatory agency responsible for enforcing federal campaign finance laws and overseeing the financing of elections for federal office.
- 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: FDD Target entity description: FDD (Frequency Division Duplex) is a communication method that separates uplink and downlink signals onto different frequency bands to enable simultaneous two-way wireless transmission.
-
A.
DDF
DDF is the commonly used abbreviation for the Dicastery for the Doctrine of the Faith, the Vatican department responsible for promoting and safeguarding Catholic doctrine.
-
B.
FFC
FFC is the commonly used abbreviation for Falkirk Football Club, a professional Scottish football team based in Falkirk.
-
C.
F.D.
F.D. is the standard abbreviation of the Latin title "Fidei Defensor," historically used by English and later British monarchs to denote their role as "Defender of the Faith."
-
D.
DDC
DDC is a widely used library classification system that organizes books and other materials into numbered subject categories for easy retrieval.
-
E.
FEC
FEC is the independent U.S. regulatory agency responsible for enforcing federal campaign finance laws and overseeing the financing of elections for federal office.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
duplexing method
ⓘ
radio access technology feature ⓘ wireless communication technique ⓘ |
| abbreviationFor | Frequency Division Duplex ⓘ |
| appliedIn |
fixed wireless access systems
ⓘ
mobile broadband networks ⓘ |
| associatedWith | 3GPP standards ⓘ |
| category |
duplexing scheme
ⓘ
radio interface technology concept ⓘ |
| contrastsWith |
TDD
ⓘ
Time Division Duplex ⓘ |
| definedIn |
3GPP LTE specifications
ⓘ
linked to:
3GPP Technical Specifications
3GPP NR specifications ⓘ |
| enables | simultaneous two-way communication ⓘ |
| fullName |
Frequency Division Duplex
ⓘ
linked to:
FDD
|
| hasAdvantage |
good support for symmetric traffic
ⓘ
low latency for bidirectional traffic ⓘ no need for time synchronization between uplink and downlink slots ⓘ |
| hasDesignGoal |
continuous transmission in both directions
ⓘ
efficient use of paired spectrum ⓘ |
| hasDisadvantage |
less flexible for highly asymmetric traffic patterns
ⓘ
requires paired spectrum allocation ⓘ |
| hasParameter | duplex spacing between uplink and downlink frequencies ⓘ |
| hasProperty |
uplink and downlink are spectrally separated
ⓘ
uplink and downlink operate at the same time ⓘ |
| implementedIn |
base stations
ⓘ
user equipment ⓘ |
| relatedTo |
frequency reuse planning
ⓘ
spectrum allocation policy ⓘ |
| requires |
duplexer in RF front-end
ⓘ
paired frequency bands ⓘ |
| separates | uplink signals and downlink signals ⓘ |
| supports |
data services
ⓘ
voice services ⓘ |
| usedIn |
2G GSM systems
ⓘ
3G UMTS systems ⓘ 4G LTE systems ⓘ 5G NR deployments ⓘ cellular networks ⓘ microwave radio links ⓘ satellite communication systems ⓘ |
| usesComponent |
downlink carrier frequency
ⓘ
uplink carrier frequency ⓘ |
| usesPrinciple | frequency division ⓘ |
| usesResourceSeparation | different frequency bands for uplink and downlink ⓘ |
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: FDD Description of subject: FDD (Frequency Division Duplex) is a communication method that separates uplink and downlink signals onto different frequency bands to enable simultaneous two-way wireless transmission.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: FDD