Systems Theory and Operations Description

0583-EX-PL-2015 Text Documents

THALES InFlyt Experience

2015-09-09ELS_166863

                                 EXHIBIT 2: System Theory of Operation and Description

This FCC license application is to obtain the permission for Experimental Radio service that
allows the transmission of the low RF power in the GSM frequency ranges listed as follows:

420 – 430 MHz, 460 – 470 MHz, 810 – 826 MHz, 869 – 894 MHz, 921 – 960 MHz,

1805 – 1880 MHz, 1930 – 1990 MHz, 2110 – 2170 MHz, 2620 – 2690 MHz

The equipment that used for this experiment development laboratory includes:

   1. Two Base Transmitter Station (BTS) units, which are used to generate the above RF
      signals that would be fed directly into the NCU

   2. One Network Control Unit (NCU) is used to amplify the receive RF signal from the BTS
      units, and raising the noise floor level of this RF signal in one or more dedicated GSM
      bands as listed above before routing to the Leaky Line Antennas for transmission.

   3. GORE™ Leaky Feeder Antennas are used to propagate the RF signal that is being
      generated by the NCU.

   4. An RF/EMI Shielding Portable Enclosure to isolate (with >80 dB of RF attenuation in the
      frequency band 300MHz-16 GHz) the outside electromagnetic signals from the inside
      electromagnetic signals in order to maintain an independent area free from outside
      interference. Secondly, the EMI chamber will also be used to confine the OMTS (Pico
      Cell) transmit signals inside the chamber when making a phone call

The NCU Maximum RF output power is about 33dBm. This signal is attenuated by a 33dB
Attenuator, which will result in 0 dBm RF level to be fed into the Leaky Line Antennas. Since the
RF/EMI Shielding Enclosure has >80dB RF isolation, the maximum RF radiated power that may
be seen outside of the EMI chamber is -80 dBm. However, the RF radiation power could be seen
to be about -57dBm at the coaxial cable between the NCU and the EMI chamber due to its
typical maximum isolation of 90 dB.

            LEAKY LINE Antenna




                                                                        BTS

                                            33dB         33 dBm
                                             ATT
                                                   Coax Cable
      RF/EMI Shielding Portable Enclosure
                                                                  NCU
     (>80 dB Attenuation, 300MHz-16GHz)


                                                                        BTS

            LEAKY LINE Antenna



Document Created: 2015-09-08 16:37:22
Document Modified: 2015-09-08 16:37:22

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