Description

0284-EX-CM-2019 Text Documents

Samsung Information System America, Inc

2019-10-22ELS_240077

Exhibit – A – Form 442 Question 7: Experimental Description
7. If all the answers to Items 4, 5, 6 are "NO", include as an exhibit a narrative statement
describing in detail the following items:
a. The complete program of research and experimentation proposed including description of
equipment and theory of operation.
In order to consider moving broadband communications into higher frequencies due
to the potential GHz of available spectrum, the design of such systems need to better
understand radio frequency environment challenges. There has been an increased
interest in using mmWave frequencies for short range NLOS communication with
multi-Gbps data rates, especially at 60 GHz. These systems have been equipped with
antenna arrays to support beamforming, which compensate for the path loss and
enable NLOS communication for stationary users over short distances. Channel
models for mmWave communication have been studied for outdoor, fixed
environments for LMDS applications and for indoor, mobile for 60 GHz applications.
However, deeper understanding of the mmWave channel is needed for outdoor,
mobile environments to understand path loss, angular spread, delay spread, NLOS
beamforming and blocking issues and is a focus of our on-going research. In this
context, channel sounding and propagation measurements are needed to provide
knowledge that is essential for the design of a mmWave communication system for
mobile, outdoor environments.
b. The specific objectives sought to be accomplished.
Fully characterize the radio channel at mmWave frequencies for mobile, outdoor
environments to understand path loss, angular spread, delay spread, NLOS
beamforming and blocking issues.
c. How the program of experimentation has a reasonable promise of contribution to the
development, extension, expansion or utilization of the radio art, or is along line not
already investigated.
Samsung Telecommunications America was granted a 24-month experimental license
from FCC at 28 GHz for measurements up to 1 km. [Call sign: WF2XXE, File
number: 0362-EX-PL-2011]. The initial experiments done at 28 GHz have been very
encouraging. We were able to operate at > 100 m distances and were able to perform
path loss and angle-of-arrival experiments. The results showed that we could capture
NLOS paths and reflections via objects such as concrete and the ground.
The current application will provide for an additional 2-year evaluation at 28 GHz in
order to perform more detailed channel measurements at 28 GHz for outdoor, mobile
channels, for an extended distance of up to 2 km radius around Samsung
Telecommunications America in Richardson, TX USA. We now intend to investigate
different channel environments such as urban, semi-urban and rural environments
around Samsung Telecommunications America to investigate their impact on
communication. In order to investigate mobility and different channel environments,
and to test uplink communication, we require use of multiple fixed (base-stations) and
mobile transmitters in the system

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Exhibit – B - Determination of compliance with the exposure limits in §1.1310
or §2.1093
As per the exposure limits in §1.1310, the MPE for occupational/controlled exposure at
28 GHz is 5 mW/cm2 and for general population or uncontrolled exposure, it is 1
mW/cm2. Since the tests are controlled as per the definition of controlled environments in
Table 1 in §1.1310, we shall assume the MPE of 5 mW/cm2 for our compliance.
For the base-station transmitter with 43 dBm output power and HPBW of 5 degrees, the
MPE compliance will be met at 5.08 meters. Since the base-station is mounted on the
roof, access to the roof during testing will be limited to personal aware of the required
exclusion zones in the area of the antenna to ensure there is no exposure issue and
compliance will be achieved. For 30 degree and 55 degree antennas, the MPE
compliance will be easily met at 1.61 meters and 0.90 meters respectively due to their
larger beam width.
For the mobile station transmitter with 30 dBm output power and HPBW of 5 degrees,
the MPE compliance will be met at 1.18 meters. However, since there will be an engineer
monitoring the receiver, the engineer will guarantee that no one is standing within an area
of 5 degrees and 1.18 meters in front of the mobile transmitter. Due to the directionality
of the horn antenna, the MPE is easily met outside the HPBW of the horn antenna. For 30
degree and 55 degree antennas, the MPE compliance will be easily met at 0.36 meters
and 0.20 meters respectively due to their larger beam width.
Table 1: Distance at which MPE limit is met
(Per OET Bulletin-65, Equation 7)

Transmitter HPBW = 5 HPBW = 30 HPBW = 55

Base-station (20 W) 5.08m 1.61m 0.90m

Mobile station (1 W) 1.14m 0.36m 0.20m

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Exhibit – C – Antenna Registration Question 4: Directional Antenna
Information
Half-power beam width (HPBW) : 55, 30 and 5 degrees
Gain: 10, 15 and 25 dBi (inversely proportional to HPBW)
The antennas used will be linearly polarized horn antennas. The antennas corresponding
to the base-station will be fixed during a set of experiments. The base-station antenna
will be around 3 m above the roof of the 3-story building and downtilted approximately
15 degrees. The mobile antenna will be at the ground level. In addition, the mobile
transmit antenna will also be directional and point towards the best link towards the base-
station which will further minimize interference. The mobile transmitter will be within a
radius of 1 km to the base-station transmitters. The same antennas will be used for the
purposes of experimentation at the base-station fixed transceiver and the mobile
transceiver.

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Document Created: 2015-12-16 16:03:54
Document Modified: 2015-12-16 16:03:54

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