TDD


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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 ?
Dov Bar-Gera, CEO of YooMee Africa, said : "In addition to our efforts in Cameroon, we plan to deploy TDD LTE in other countries in which YooMee is holding the relevant licences in the coming years.
The partnership with Intel follows on the heels of Huawei showcasing the world's first 4x4 MIMO (Multiple Input Multiple Output) carrier aggregation solution for LTE TDD.
Greenpacket will be showcasing its new High-Gain TDD LTE USB Modem at the Mobile World Congress 2012 conference in Barcelona from February 27th to March 1st.
International standardization and compliance with global spectrum requirements has made UMTS TDD the logical choice for every national regulator considering broadband wireless access services.
John Wodatch, chief of the Justice Department's Disability Rights Section, said California's settlement is not a signal that the state's 911 centers are worse off concerning TDDs than any other state.
Until recently, there would be no way for a TDD user to properly interact with the remote application.
The advantage of calling friends or family members is that it requires neither the deaf person nor the specialist to own a TDD.
To date, dual connectivity TDD and FDD has been recognised as the leading and most economical technology with the highest scalability to provide user-centric services and enhance user perception in macro-micro networking scenarios.
Schoolar added: "Combining multiple standards such as GSM and WCDMA/HSPA and LTE FDD and/or TDD will grow the overall network capacity and increase quality of service.
Greenpacket, a developer of next generation mobile broadband and networking solutions, announced that it will reveal the world's first high-gain TDD LTE modem at the upcoming Mobile World Congress.
According to the company, it is an important milestone in the development of next generation wireless services for TD-SCDMA mobile network deployments in China, as well as advancing the deployment of LTE for service providers using TDD spectrum.
4 GHz solution by re-banding its robust, UMTS TDD Mobile Broadband platform.