Aerospace and Electronic Systems Magazine May 2018 - 71

Kumar and Prasad

Figure 5.

SCIDAS deployment over existing available infrastructure.

Working of the Intelligent Sub-architecture: Control Function
The MCP is connected with ISa through SMU and SRU. ISa can
use the DAS architecture to disperse MCP instructions to every
SRU. Accordingly, each SRU will guide local MCP to adjust angles and heights of the mounted antennas. This is a unique approach to making a network responsive to time.

Working of the Intelligent Sub-architecture: Sensing Function
The APN uses the same DAS architecture to determine the location, density, and the velocity (movement with direction) of the
users in the network area. Usually, the APN is intended to operate
in a passive mode where it only receives signals from the BS to
identify variations in the received signal levels. Nonetheless, in
the case of rapidity, the APN will also use the DAS network to
send strong signal bursts sequentially or simultaneously from each
of the network antennaes that are located across the system. This
process of sending bursts of signals is defined as the active probing
technique [5]. ISa will use the DAS network to approach each and
every SRU and instruct them to feed the connected antennas with
an intense probing burst. The signal burst will leave the transmitting antenna and propagate in the environment to interact with the
environmental elements, such as people, vehicles, buildings, etc.,
MAY - JUNE 2018

thereby changing the amplitude values. These change in amplitude
values can be sensed by the nearby DAS antennas, whose SRUs
can send the detected signal back to ISa.
The received signals from all antennas in the proximity will
give a good idea of the kind of environment evolving underneath
those antennas. With careful adjustments, using MCPs, the signal
bursts can be directed to a particular location to minimise the contributions of environmental elements other than people. From the
known amplitude of the signal burst and the series of received signals in quick successions, the channel matrix values, using (2), can
be evaluated. Therefore, any severe change in the channel matrix is
a clear indication of wobbling of PTC2 in the focused area.

MITIGATING PTC 2 CHALLENGE
This section shows how the SCIDAS will resolve the PTC2 challenge.

SINGLE NETWORK GENERATION
When an area is deployed with the SCIDAS network, solving the
user accumulation is easier. As the users start accumulating, the
SCIDAS network identifies the problem in advance by iterative

IEEE A&E SYSTEMS MAGAZINE

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