Informatika és tudomány

  • Supergamer_real
    #10
    A barátod gondolkozzon, mielőtt hülyeségeket beszél:

    Summary of UMTS frequencies:

    1920-1980 and 2110-2170 MHz Frequency Division Duplex (FDD, W-CDMA) Paired uplink and downlink, channel spacing is 5 MHz and raster is 200 kHz. An Operator needs 3 - 4 channels (2x15 MHz or 2x20 MHz) to be able to build a high-speed, high-capacity network.
    1900-1920 and 2010-2025 MHz Time Division Duplex (TDD, TD/CDMA) Unpaired, channel spacing is 5 MHz and raster is 200 kHz. Tx and Rx are not separated in frequency.
    1980-2010 and 2170-2200 MHz Satellite uplink and downlink.