Frequency Division Duplex

E524099

communication technique duplexing method

Frequency Division Duplex is a communication method in which uplink and downlink transmissions occur simultaneously on separate frequency bands, commonly used in cellular and wireless networks.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (2)

Label	Occurrences
FDMA	2
Frequency Division Duplex canonical	2

How this entity was disambiguated

This entity first appeared as the object of triple T5479737 — 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: Frequency Division Duplex
Context triple: [FDD, abbreviationFor, Frequency Division Duplex]

A. Time Division Duplex
Time Division Duplex is a wireless communication method that uses a single frequency band for both uplink and downlink by separating them in time rather than frequency.
B. 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.
C. SC-FDMA
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.
D. 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.
E. Time Division Multiple Access
Time Division Multiple Access (TDMA) is a channel access method that divides a communication medium into time slots so multiple users can share the same frequency without interference.
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: Frequency Division Duplex
Target entity description: Frequency Division Duplex is a communication method in which uplink and downlink transmissions occur simultaneously on separate frequency bands, commonly used in cellular and wireless networks.

A. Time Division Duplex
Time Division Duplex is a wireless communication method that uses a single frequency band for both uplink and downlink by separating them in time rather than frequency.
B. 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.
C. SC-FDMA
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.
D. 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.
E. Time Division Multiple Access
Time Division Multiple Access (TDMA) is a channel access method that divides a communication medium into time slots so multiple users can share the same frequency without interference.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	communication technique ⓘ duplexing method ⓘ
abbreviation	FDD ⓘ
alsoKnownAs	frequency‑division duplexing ⓘ
appliedInStandard	5G NR FDD ⓘ GSM ⓘ LTE FDD ⓘ linked to: LTE UMTS FDD ⓘ linked to: FDD cdma2000 ⓘ linked to: CDMA2000
benefit	good support for continuous services like voice ⓘ low latency between uplink and downlink ⓘ simultaneous voice and data transmission ⓘ
challenge	less flexible for asymmetric traffic patterns ⓘ more complex RF hardware due to duplexers ⓘ requires paired spectrum allocation by regulators ⓘ
contrastedWith	Time Division Duplex ⓘ
contrastsInResourceSeparationWith	code separation in CDMA systems ⓘ time separation in TDD ⓘ
governedBy	spectrum allocation regulations ⓘ
hasDesignParameter	channel bandwidth per direction ⓘ guard band width ⓘ uplink–downlink frequency separation ⓘ
hasProperty	enables full duplex communication ⓘ less sensitive to uplink–downlink interference than TDD ⓘ often used in coverage‑oriented deployments ⓘ provides constant transmit and receive channels ⓘ requires paired spectrum ⓘ supports simultaneous uplink and downlink ⓘ uplink and downlink are separated by guard band ⓘ uses separate frequency bands for uplink and downlink ⓘ well suited for symmetric traffic ⓘ
implementedUsing	guard band between uplink and downlink frequencies ⓘ separate downlink carrier frequency ⓘ separate uplink carrier frequency ⓘ
relatedConcept	downlink frequency band ⓘ full‑duplex communication ⓘ paired spectrum band ⓘ uplink frequency band ⓘ
requires	duplexer in radio front‑end ⓘ frequency planning for paired bands ⓘ
typicalIn	sub‑3 GHz cellular bands ⓘ
usedFor	broad area cellular coverage ⓘ mobile data services ⓘ mobile voice services ⓘ
usedIn	cellular networks ⓘ microwave links ⓘ mobile broadband networks ⓘ satellite communication systems ⓘ wireless communication systems ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

FDD → abbreviationFor → Frequency Division Duplex ⓘ

OFDMA → contrastedWith → FDMA ⓘ

linked to: Frequency Division Duplex

Time Division Duplex → contrastedWith → Frequency Division Duplex ⓘ

CDMA → contrastedWith → FDMA ⓘ