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 ?
The FDD full-band 4x4 MIMO antenna jointly developed with TIM will help TIM as well as other operators rapidly deploy 5G-oriented networks.
This live FDD trial also demonstrated that the macro coverage of 3.
The FDD publication also pointed to the fact that Turkey helped the Iranian regime gain $13 billion through a "gas-for-gold" program even as Turkey's NATO allies sought to punish Tehran for its nuclear program.
The FDD tool has no special operational requirements for air-conditioning systems, and doesn't need an additional sensor.
We needed to communicate which FDD supporters were invited to the reception," May wrote to IPS in an e-mail.
If positions on the deck preclude direct, line-of-sight communication between the FDD and crew, you should discuss relay signals during the brief.
The suggested methodology involved developing analytical expressions for FDD evaluation cast as an objective function made up of two competing considerations: 1) cost associated with false alarms and 2) penalties associated with the onset of faults.
The cost-to-benefit ratio for an FDD implementation is relatively high, partly caused by the lack of extensive instrumentation in the building and HVAC&R systems and lack of data to quantify the benefits (Braun 1999).
This includes trouble-free support for TDD or FDD, increased channel bandwidths, larger FFT sizes, sub-channelisation or new FEC-modes (convolutional turbo-code).
The Rohde & Schwarz FSIQ signal analyser has recently been equipped to perform WCDMA FDD (Frequency Division Duplex) measurements on base stations and terminals.
I had such a bad case of FDD that only psychotics and psychics could get to me.