FDD


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FDD

(1) (Frequency Division Duplexing) A transmission method that uses separate channels for the uplink and downlink (transmit and receive). If the channel frequencies are adjacent, a guard band may be used between them to reduce interference. Contrast with TDD.

(2) Abbreviation for floppy disk drive. See floppy disk.
References in periodicals archive ?
He referred to the US administration and the FDD's reaction to Iran's sanctions against the think tank, and said the US government and those who are paid by the B-team, including the FDD, are expected to do nothing, but propaganda and exaggeration.
Every year, each franchisor must update the Item 20 tables of their FDD, which state the number of units awarded, transferred, re-acquired by the franchisor and closed.
Katipamula and Brambley (2005a, 2005b) also stated that future FDD systems in buildings should have the following characteristics:
For Idea customers with handsets that support Carrier Aggregation of both the FDD and TDD bands, the 4G experience will be far more enhanced with up to 3.5x increase in internet speed, while customers with handsets that do not support Carrier Aggregation will also experience up to 2x increase in internet speeds.
FDD Massive MIMO is part of a trial with T-Mobile US, on three sites in Baltimore, Maryland.
The proposed evaluation method is applied to the UTRA/ FDD LTE B8 and UTRA/FDD LTE B3 antenna prototypes in order to show how the impedance ellipse fits the variability region.
There are several agile models proposed in the history of software engineering such as XP, Feature Driven Development (FDD), Adaptive Software Development (ASD) and Dynamic System Development Model (DSDM).
The ME3630 operates on FDD LTE penta-band (bands 2, 4, 5, 13, 17) and UMTS dual-band (bands 2, 5), allowing it to operate nationwide within the United States on 4G LTE and 3G networks, as well as in regions such as Canada and Latin America.
Major number of these devices supports both TDD and FDD modes of operation over broad frequency spectrum.
Rohde & Schwarz announced it has successfully verified combining various frequency bands in mixed-mode time division duplex (TDD) and frequency division duplex (FDD) mixed-carrier aggregation.
As per the telco, 4G LTE FDD technology is very efficient on 1800 MHz and allows greater speeds & accommodates higher subscriber base to provide an unmatched customer experience.