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2. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.

3. Time-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Time-division_multiple_access

   Most 2G cellular systems, with the notable exception of IS-95, are based on TDMA. GSM, D-AMPS, PDC, iDEN, and PHS are examples of TDMA cellular systems.. In the GSM system, the synchronization of the mobile phones is achieved by sending timing advance commands from the base station which instruct the mobile phone to transmit earlier and by how much.

4. List of wireless network protocols - Wikipedia

   en.wikipedia.org/wiki/List_of_wireless_network...

   Comparison of mobile Internet access methods Common name Family Primary use Radio tech Downstream (Mbit/s) Upstream (Mbit/s) Notes HSPA+: 3GPP: Mobile Internet: CDMA/TDMA/FDD MIMO: 21 42 84 672: 5.8 11.5 22 168: HSPA+ is widely deployed. Revision 11 of the 3GPP states that HSPA+ is expected to have a throughput capacity of 672 Mbit/s. LTE: 3GPP ...

5. List of wireless network technologies - Wikipedia

   en.wikipedia.org/wiki/List_of_wireless_network...

   The North American Standards IS-54 and IS-136 were also second-generation (2G) mobile phone systems, known as (Digital AMPS) and used TDMA with three time slots in each 30 kHz channel, supporting 3 digitally compressed calls in the same spectrum as a single analog call in the previous AMPS standard. This was later changed to 6 half rate time ...

6. List of Wear OS devices - Wikipedia

   en.wikipedia.org/wiki/List_of_Wear_OS_devices

   Galaxy Watch 5 Pro Yes 590 mAh Galaxy Watch 6 44 mm 2023-08-11 Wear OS 5.0 Android 14 Samsung Exynos W930: 2 GB Yes 425 mAh Round, 1.46 in (37 mm) IP68 + Waterproof: 5 ATM (swim-ready, up to 50m) + US Military Standard: MIL-STD-810H: Galaxy Watch 6 40 mm Yes 300 mAh Round, 1.31 in (33 mm) Galaxy Watch 6 Classic 47 mm Yes 425 mAh

7. Channel access method - Wikipedia

   en.wikipedia.org/wiki/Channel_access_method

   The time-division multiple access (TDMA) channel access scheme is based on the time-division multiplexing (TDM) scheme. TDMA provides different time slots to different transmitters in a cyclically repetitive frame structure. For example, node 1 may use time slot 1, node 2 time slot 2, etc. until the last transmitter when it starts over.