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2. Intel XMM modems - Wikipedia

   en.wikipedia.org/wiki/Intel_XMM_Modems

   The Intel XMM modems are a series of 4G LTE, LTE Advanced, LTE Advanced Pro and 5G modems found in many phones, tablets, laptops and wearables (sans 5g-technology) developed by Intel Mobile Communications. [1] Intel Mobile Communications was formed after Intel acquired the Wireless Solutions (WLS) division of Infineon early in 2011 for US$1.4 ...

3. List of Qualcomm Snapdragon modems - Wikipedia

   en.wikipedia.org/wiki/List_of_Qualcomm...

   5G Spectrum: mmWave-sub6 aggregation, sub-6 carrier aggregation (FDD-TDD, FDD-FDD, TDD-TDD), FDD-TDD support for uplink-CA, Dynamic Spectrum Sharing (DSS) 5G mmWave specs: 400 MHz bandwidth 5G sub-6 GHz specs: 200 MHz bandwidth

4. Duplex (telecommunications) - Wikipedia

   en.wikipedia.org/wiki/Duplex_(telecommunications)

   For example, a walkie-talkie or a DECT phone or so-called TDD 4G or 5G phones requires only a single frequency for bidirectional communication, while a cell phone in the so-called FDD mode is a full-duplex device, and generally requires two frequencies to carry the two simultaneous voice channels, one in each direction.

5. 5G NR frequency bands - Wikipedia

   en.wikipedia.org/wiki/5G_NR_frequency_bands

   Frequency bands for 5G New Radio (5G NR), which is the air interface or radio access technology of the 5G mobile networks, are separated into two different frequency ranges. First there is Frequency Range 1 (FR1), [ 1 ] which includes sub-7 GHz frequency bands, some of which are traditionally used by previous standards, but has been extended to ...

6. List of Qualcomm Snapdragon systems on chips - Wikipedia

   en.wikipedia.org/wiki/List_of_Qualcomm...

   Internal X60 5G Modem; Modes: NSA, SA, TDD, FDD; 5G mmWave: 800 MHz bandwidth, 8 carriers, 2×2 MIMO; 5G sub-6 GHz: 200 MHz bandwidth, 4×4 MIMO; 5G NR Sub-6 + mmWave download: 7500 Mbit/s DL; 5G NR Sub-6 + mmWave upload: 3000 Mbit/s UL; LTE download: 2500 Mbit/s DL (Cat. 24), 7x20 MHz CA, 1024-QAM, 4x4 MIMO

7. Time-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Time-division_multiple_access

   UTRA-TDD (Time Division Duplex), on the other hand, combines CDMA with TDMA and TDD. In this scheme, the same frequency band is used for both uplink and downlink, but at different times. This time-based separation is particularly advantageous in scenarios with asymmetric traffic loads, where the data rates for uplink and downlink differ ...