Frequency Division Multiple Access
E566520
Frequency Division Multiple Access (FDMA) is a channel access method in which the available bandwidth is divided into distinct frequency bands so multiple users can transmit simultaneously on different frequencies.
All labels observed (2)
| Label | Occurrences |
|---|---|
| FDMA | 1 |
| Frequency Division Multiple Access canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6042250 — 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 Multiple Access Context triple: [Time Division Multiple Access, contrastedWith, Frequency Division Multiple Access]
-
A.
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.
-
B.
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.
-
C.
Frequency Division Duplex
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.
-
D.
FDMA
FDMA is Japan’s national agency responsible for coordinating fire services, emergency medical response, and disaster management across the country.
-
E.
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.
- 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 Multiple Access Target entity description: Frequency Division Multiple Access (FDMA) is a channel access method in which the available bandwidth is divided into distinct frequency bands so multiple users can transmit simultaneously on different frequencies.
-
A.
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.
-
B.
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.
-
C.
Frequency Division Duplex
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.
-
D.
FDMA
FDMA is Japan’s national agency responsible for coordinating fire services, emergency medical response, and disaster management across the country.
-
E.
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.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
channel access method
ⓘ
multiple access scheme ⓘ |
| abbreviation | FDMA ⓘ |
| accessPrinciple |
assigns distinct frequency bands to different users
ⓘ
divides available bandwidth into multiple frequency channels ⓘ |
| advantage |
low latency due to continuous channel availability
ⓘ
predictable performance per user ⓘ simple implementation ⓘ |
| aimsTo | avoid interference between users by frequency separation ⓘ |
| allocates | fixed frequency channels to users ⓘ |
| canBeCombinedWith |
Code Division Multiple Access
ⓘ
Space Division Multiple Access ⓘ Time Division Multiple Access ⓘ |
| canUse | dynamic frequency assignment ⓘ |
| channelAssignmentType | orthogonal frequency channels ⓘ |
| contrastsWith |
Code Division Multiple Access
ⓘ
Space Division Multiple Access ⓘ Time Division Multiple Access ⓘ |
| disadvantage |
inefficient spectrum use under bursty traffic
ⓘ
limited flexibility for dynamic traffic patterns ⓘ requires guard bands that waste spectrum ⓘ susceptible to narrowband interference on a channel ⓘ |
| goal | share spectrum among multiple independent users ⓘ |
| historicalUse |
AMPS analog cellular system
ⓘ
NMT analog cellular system ⓘ TACS analog cellular system ⓘ |
| isUsedIn |
1G cellular networks
ⓘ
aeronautical communication systems ⓘ analog cellular systems ⓘ maritime communication systems ⓘ microwave radio relay systems ⓘ satellite communication systems ⓘ trunked radio systems ⓘ |
| mediumSharingMethod | frequency division ⓘ |
| multiplexingType | orthogonal multiplexing in frequency domain ⓘ |
| operatesOn | radio frequency channels ⓘ |
| relatedConcept |
channelization
ⓘ
co-channel interference ⓘ frequency reuse ⓘ guard band ⓘ |
| requires |
channelized RF front-ends
ⓘ
coordination by a central controller or planning authority ⓘ frequency planning ⓘ frequency-selective filters ⓘ frequency-stable oscillators ⓘ guard bands between adjacent channels ⓘ |
| resourceDimension | frequency ⓘ |
| supports | simultaneous transmission by multiple users ⓘ |
| typicalImplementation | narrowband channels with fixed bandwidth ⓘ |
| usedFor |
downlink channels in some satellite systems
ⓘ
uplink channels in some satellite systems ⓘ |
| usesResourceType | frequency spectrum ⓘ |
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: Frequency Division Multiple Access Description of subject: Frequency Division Multiple Access (FDMA) is a channel access method in which the available bandwidth is divided into distinct frequency bands so multiple users can transmit simultaneously on different frequencies.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Frequency Division Multiple Access