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  2. Time-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Time-division_multiple_access

    A disadvantage of TDMA systems is that they create interference at a frequency that is directly connected to the time slot length. This is the buzz that can sometimes be heard if a TDMA phone is left next to a radio or speakers. [9] Another disadvantage is that the "dead time" between time slots limits the potential bandwidth of a TDMA channel.

  3. The main discussion of these abbreviations in the context of drug prescriptions and other medical prescriptions is at List of abbreviations used in medical prescriptions. Some of these abbreviations are best not used, as marked and explained here.

  4. Medical billing - Wikipedia

    en.wikipedia.org/wiki/Medical_billing

    Medical billing, a payment process in the United States healthcare system, is the process of reviewing a patient's medical records and using information about their diagnoses and procedures to determine which services are billable and to whom they are billed.

  5. Channel access method - Wikipedia

    en.wikipedia.org/wiki/Channel_access_method

    An advanced form is dynamic TDMA (DTDMA), where an assignment of transmitters to time slots varies on each frame. Multi-frequency time-division multiple access (MF-TDMA) combines time and frequency multiple access. As an example, 2G cellular systems are based on a combination of TDMA and FDMA

  6. Channel allocation schemes - Wikipedia

    en.wikipedia.org/wiki/Channel_allocation_schemes

    In Fixed Channel Allocation or Fixed Channel Assignment (FCA) each cell is given a predetermined set of frequency channels. FCA requires manual frequency planning, which is an arduous task in time-division multiple access (TDMA) and frequency-division multiple access (FDMA) based systems since such systems are highly sensitive to co-channel interference from nearby cells that are reusing the ...

  7. Multi-frequency time-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Multi-frequency_time...

    MF-TDMA ("Multi-frequency time-division multiple access") is a technology for dynamically sharing bandwidth resources in an over-the-air two-way communications network.

  8. Self-organized time-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Self-organized_time...

    Time-division multiple access (TDMA) divides a channel into frames, which furthermore are subdivided into a vast number of time slots. Users transmit in rapid succession, one after the other, each using their own time slot. One of the drawbacks of TDMA is that it requires a central station for slot assignment and time synchronization.

  9. Single-carrier FDMA - Wikipedia

    en.wikipedia.org/wiki/Single-carrier_FDMA

    Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. Originally known as Carrier Interferometry , it is also called linearly precoded OFDMA ( LP-OFDMA ). Like other multiple access schemes (TDMA, FDMA, CDMA, OFDMA), it deals with the assignment of multiple users to a shared communication resource.

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