TDD


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Wikipedia.

TDD

TDD

(1) (Telecommunications Device for the Deaf) See TDD/TTY.

(2) (Time Division Duplexing) A transmission method that uses the same channel for the uplink and downlink (transmit and receive), but separates them by time slots. In 1/1 TDD, downlink slots are interleaved equally with the uplink; a 2/1 TDD gives the downlink twice as many slots as the uplink. However, in a wireless application, power is a critical factor. For example, mobile phone antennas transmit less power than the cell tower antennas, and even a 1/1 TDD yields a lower uplink speed to the tower than the downlink speed from the tower. Contrast with FDD.
References in periodicals archive ?
YooMee aims to deploy TDD LTE in its new markets within six months.
LTE TDD is a service designed to be more like home broadband in which transmissions travel in both directions on the same frequency band.
and/or TDD will grow the overall network capacity and increase quality of
We will continuously invest in LTE TDD research and deployment as well as the global expansion of LTE TDD networks.
8220;Greenpacket is working diligently to be the partner of choice for enabling high speed mobile broadband experience on TDD LTE.
The new LTE TDD Measurement Suite for the PXI 3000 Series is available to order now.
The Finland decision follows recent news in Japan, another advanced wireless market, that IPMobile, a Japanese broadband wireless services company, has submitted its application to deploy a UMTS TDD system in the same 2010 MHz spectrum which was recently allocated by the Japanese regulator exclusively for UMTS TDD use.
TDD will acquire the properties for approximately $10 million, with 75% of the purchase price to be paid in cash and the remainder in the form of payment-in-kind convertible preferred stock of TDD.
In her complaint, the woman alleged that when she experienced a heart attack she could not effectively communicate with her local 911 center because it lacked a TDD.
Teletypewriter/Telecommunication Device for the Deaf (TTY/TDD) - portable device used mainly to communicate over the phone with another TDD user or Relay Service.
Documents: (800) 669-3362 / 800-3302 (TDD) Questions: (800) 669-4000 (voice) / for TDD, use relay service
If one is hearing-impaired or deaf in today's world, one uses a Telephone Device for the Deaf, or TDD.