Narrative Purpose of Experiment and Prior STA Application Dismissal

0221-EX-CN-2018 Text Documents

Silvus Technologies

2018-03-07ELS_206007

Silvus Technologies
Experimental License Application 0221-EX-CN-2018
Narrative Explanation of Operation
Use of GPS Repeater in Support of R&D Program
Los Angeles, CA

This application (a refiling, with modifications, of an STA application earlier
dismissed without prejudice; See, 1558-EX-ST-2017 and correspondence Reference
Numbers 39387 and 39852) proposes the use of a single Global Positioning System
(GPS) repeater at a single indoor location for use in fulfillment of a research project.
Silvus Technologies has an ongoing research program with DARPA for development of
new technology based on GPS signals (i.e. advanced communication and navigation
technologies that use GPS signals for timing and synchronization). For this ongoing
project, Silvus needs to receive GPS signals indoors at its Research and Development
facility at Los Angeles, California to develop and test this technology.

The occupied bandwidths of the signals and the center frequencies to be used are
as follows: For the GPS frequency: 1575.42 MHz plus and minus 10 megahertz; and for
the GLONASS frequency: 1602 MHz plus and minus 8 megahertz. The device will be
deployed indoors only at a height above ground level within an enclosed building of 50
meters.

Compliance with Section 8.3.28 of the NTIA Manual

The Commission, with respect to the previous STA application referenced above,
called for a demonstration of compliance with Section 8.3.28 of the NTIA manual and
specifically items a, b and e through i. The applicant has obtained a replacement GPS
repeater with variable attenuation that permits full compliance with the requirements of
that Section of the NTIA Manual. That information is as follows:

a. This Experimental License is for indoor use only and is required for this one device at
this one site.
b. The device is to be used as experimental test equipment used for the purpose of
developing new technology based on GPS signals for advanced communications and
navigation technologies as per the above explanation.
e. The area of potential interference to GPS reception is within the applicant’s facility and
under the control of the applicant. Areas beyond this range are protected by virtue of the
attenuation of the signal and the power level set forth below.
f. The EIRP meets the limit specified in this subsection in that they do not exceed -140
dBm/24 MHz as received by an isotropic antenna at a distance 30 meters from the
building where the test is being conducted. The device’s operating parameters are as
follows:

Radius around center point (intended operating range)
10m
Distance from nearest interior wall

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10m
Average power
12.6 dBm - 85 dB = -72.4 dBm (57.5 pW)
ERP
13.5 dBm - 85 dB = -71.49 dBm

Meeting formula requirement
PTmax(pW) = 69.8 pW from formula
PT of our equipment = 57.5 pW using variable attenuation

Upon receipt of any complaint of interference from any source, FCC licensee or
government entity (or otherwise), operation pursuant to this Experimental Authorization
will cease and will not resume unless and until the interference complaint is resolved
satisfactorily to the complainant. GPS users in the building will be notified that GPS
information may be impacted for periods of time.

The stop buzzer contact for this operation is Phoebe Basilio, whose telephone
number is 310-479-3333. This person will be available at all times during GPS re-
radiator operations.

All other communications can be directed to the office of counsel for Silvus
Technologies, as follows:

Christopher D. Imlay
Booth, Freret & Imlay
14356 Cape May Road
Silver Spring, MD 20904-6011
1-301-384-5525 office telephone
1-301-351-3795 cell
chris@imlaylaw.com

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Document Created: 2018-03-07 13:30:48
Document Modified: 2018-03-07 13:30:48

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