Editor and Layout: Ludwig Drexl, Redaktion – Technik (München) · Translation: Dept. 9UK7
Printed by: peschke druck (München) · Reproduction of extracts permitted
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MIL NEWS · 7/2003
3
Radiomonitoring System R&S ® RAMON
Remote-controlled semi-mobile radiomonitoring and radiolocation systems
Rohde & Schwarz offers a wide
range of products specially tailored
to the needs of radiomonitoring.
The R&S ® RAMON software family
provides all the control components
for setting up systems of various
sizes. This article presents a scalable
system that comprises standardized
units and system software based on
TITLE STORY
R&S ® RAMON.
Remote control of radiomonitoring systems
A typical radiomonitoring task is to monitor remote target areas without setting
up an infrastructure or deploying highly
qualified personnel on site (FIG 1). In this
case, unattended radiomonitoring and
direction finding stations are set up for
each of the target areas and controlled
from a central monitoring and evaluation
station. The latter can cover a number of
these target areas, either in time-sharing
mode or, provided there are sufficient
resources, in parallel.
In the new modular system, the features of the R&S ® RAMON [*] software
family are united into a flexible system
using mainly standardized units. In the
design phase of the R&S ® RAMON-based
system software, special emphasis was
placed on the remote control capability
of all functions. The remote-controlled
semi-mobile radiomonitoring and radiolocation systems have already been tried
and tested by customers in practice and
are available at short notice.
The advantages of this new concept are:
◆ Evaluation and analysis personnel can
work centrally and under optimum
conditions. Operation of the individual stations on site (setup, power
supply, security) requires no trained
personnel.
43740/3n
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MIL NEWS · 7/2003
◆ The individual units can be grouped
into subsystems as needed, to allow
monitoring in a target area of particular interest.
◆ The entire system can be regrouped
quickly if the priorities of the task at
hand change.
FIG 1
Central moni-
toring of remote
target areas with
remote-controlled
semi-mobile
radiomonitoring
and radiolocation
systems.
"Green country“
Stationary
central station
For remote control of the unattended
stations, different possibilities for data
communication have already been
implemented.
Standardized units
The following standardized units are cur-
rently available as system components:
◆ Semi-mobile radiomonitoring and
direction finding station (SMSR)
◆ Semi-mobile communication hub
(SMCH)
◆ Semi-mobile central station (SMCS)
◆ Stationary central station (FCS)
The semi-mobile radiomonitoring and
direction finding station (SMSR) is
remote-controlled and usually unattended (FIG 2). The entire station
together with all the necessary accesso-
ries is housed in a shelter on a vehicle. A
generator set mounted on a single-axle
trailer provides the power supply.
FIG 2
Semi-mobile radio-
monitoring and
direction finding
station (SMSR),
set up in the field.
"Blue sea“
Generator set
on trailer
10 m
"Yellow country“
Microwave gridtype antenna
3 guy ropes
GPS
Shelter
R&S®ADD195 (approx. 30 kg)
30˚
R&S®
HK309
4 guy
ropes
45˚
2.5 m
Each SMSR is equipped with two
receivers (R&S ® ESMB, R&S ® EB 200 or
R&S ® ESMC) for the frequency range
20 MHz to 1300 MHz (3000 MHz) and
a digital radio direction finder (consist-
ing of a DF Unit R&S ® EBD195, the DF
antenna and a receiver of the same
type) for this frequency range (FIG 3). Up
to four semi-mobile radiomonitoring and
direction finding stations (SMSR) form a
regional subsystem for monitoring in one
target area.
FIG 3
Structure of a
semi-mobile radio-
monitoring and
direction finding
station (SMSR)
(version with
Compact Receiver
R&S ® ESMC).
DF Antenna
R&S®ADD195
R&S®EBD195
R&S®ESMC
Antenna R&S®HK309
R&S®ESMC
System Controller
R&S®RPC
Router
R&S®ESMC
MIL NEWS · 7/2003
Microwave
antenna
Microwave
radio unit
Encryption
PSTNISDNReceiving
Modems (2)
5
The semi-mobile communication hub
(SMCH) enables the quick setup of
microwave links to as many as four semi-
mobile radiomonitoring and direction
finding stations (SMSR). Like the SMSR,
the SMCH is integrated in a shelter and
mounted on a vehicle with a single-axle
trailer complete with all its accessories
(FIG 4).
The microwave links operate in the
2.5 GHz band using DSSS (direct
sequence spread spectrum) technology
and are encrypted.
The stationary central station (FCS)
controls one or more subsystems and
can be set up for temporary or contin-
uous operation. It comprises a commu-
nication section for making the remote-
control connections, a server and a
number of workstations for the operators. The individual components are
interconnected via a local area network (LAN), allowing the central station to be set up and put into operation
quickly. Each operator workstation can
be assigned radiomonitoring tasks as
well as any desired resources of the connected SMSRs (receivers, direction finders, recording equipment).
The FCS is delivered as a complete unit
and can be set up in a suitable room by
the customer or by Rohde & Schwarz.
The semi-mobile central station
(SMCS) unites the possibilities of the
three station types already mentioned:
◆ The monitoring resources of a semi-
mobile radiomonitoring and directing
finding station (SMSR)
◆ The microwave link system of a
communication hub (SMCH)
◆ Two operator workstations to con-
trol a small autonomous system with
up to three SMSRs; additional operator workstations can be connected
externally
The station is housed in a shelter and
transported on a vehicle with single-axle
trailer.
Operational concept
The semi-mobile radiomonitoring and
direction finding stations (SMSRs) in
the described system are supposed to
be operated in unattended mode. The
resources (direction finders, receivers,
recording equipment) of all remote-con-
trolled units are fully operable from the
central station (stationary central sta-
tion FCS or semi-mobile central station
SMCS). The audio signals of the receivers are also available there.
Each operator workstation in the central
station is assigned one or more search
or monitoring tasks and the required
resources from the pool of available
resources. The assignments can be
changed at any time by an authorized
operator (supervisor) and adapted to the
situation.
The resources of the radiolocation sub-
system are available to all operator workstations. The radiolocation system can
be used either exclusively by one workstation or quasi-simultaneously by several workstations (time-sharing mode).
The system software of the solution described here is based on
R&S ® RAMON and can be adapted to
the user’s tasks and requirements at any
FIG 4
The semi-mobile
communication hub
(SMCH) in shelter,
ready for transport.
time. R&S ® RAMON is equipped with
modules for all the core tasks of a radiomonitoring system, including:
◆ Drivers and user interfaces for all
Rohde & Schwarz products used in
radiomonitoring systems.
◆ Tools for collecting the DF results
for radiolocation. The results are
graphically displayed on an electronic
map and can be inserted in reports.
The DF system can be individually
configured for each operator from the
available semi-mobile radiomonitoring
and direction finding stations (SMSR).
◆ Software for manual or automatic
recording of the audio signals of all
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MIL NEWS · 7/2003
system receivers. The recordings can
be centrally administered and evaluated.
◆ Modules for defining complex
search, scan and monitoring tasks
(JobEdit). These can be prepared,
optimized and saved in advance. They
are subsequently available at the
FIG 5 The R&S ® RAMON system model.
press of a button to take over complete device control.
◆ Modules for compiling, compressing and administering reports (mes-
sages). The reports contain technical
information (device settings and readings), which is saved via mouse click,
and information written by the opera-
tor (e.g. comments). Multimedia com-
ponents (audio recordings, map displays, etc) can also be saved.
◆ A database for saving reports.
Research tools make the database
a pool of knowledge for monitoring
staff and evaluators.
◆ Tools for system configuration. The
supervisor can assign the interception
Radiomonitoring
R&S®ESMC controlR&S®ESMC control
R&S®MapViewDF client
Request
Inbox
Handover
ReportEdit
Edit
JobEdit
Outbox
Export
DF request
DF result
Jobs
Device
settings
Data
Recording
Export
From/to remote-controlled DF stations
RadiolocationR&S®MapView
Direction finder
Import
Report
Edit
Inbox
ReportEdit
Technical requestTactical report
Outbox
Inquiry
Result
Import
Web database gateway
Report
database
Raw data
MIL NEWS · 7/2003
Supervisor
7
processing channels of the spatially
spread system to the central station’s individual workstations virtually in any way desired. In addition to
the user interface, the corresponding
audio channels for audiomonitoring in
realtime and recording are available.
Applications and implemented systems
FIG 5 shows how typical operating steps
in a radiomonitoring system are mapped
with the R&S ® RAMON software family.
For further information on R&S ® RAMON,
a Technical Information is available.
Summary
The component solution for semi-mobile
radiomonitoring and radiolocation sys-
tems presented here has decisive
advantages over specially developed
equipment:
Control of remote regional subsystems from a central monitoring and
evaluation station
Up to four radiomonitoring and direction finding stations (SMSRs) are
deployed as a regional subsystem for
radiomonitoring in a target area (FIG 6).
Depending on the existing possibilities,
these stations are connected to the
stationary central station (FCS) via dedicated lines, switched analog or ISDN
lines, or using microwave link via the
SMCH communication hub.
If analog or digital channels of the
fixed network are used, dynamic load
distribution and channel banding techniques are used.
If available, transmission channels
with higher bandwidth can also be
used between the central station and
the regional subsystem, e.g. ISDN PRI
with 2 Mbit/s (PRI: primary rate interface). Alternatively, the semi-mobile
radiomonitoring and direction finding stations (SMSR) can also be connected directly to the central station
via analog or digital fixed-network
lines. A stationary central station (FCS)
can control one or more regional subsystems (FIG 7).
Creation of small autonomous regional
systems
If it is desirable to deploy the monitoring
and evaluation personnel directly on site,
i.e. within a regional subsystem‘s coverage area, it may be wise to combine the
semi-mobile central station (SMCS) with
up to three semi-mobile radiomonitoring
and direction finding stations (SMSR).
These then form together a more or less
autonomous radiomonitoring and radiolocation system (FIG 8).
Operation of the SMSRs is unattended.
Up to two operators can work in the
shelter of the semi-mobile central station
(SMCS). If necessary, a LAN/ fiber-optic
(FO) link is used for additional operator
workstations which can be accommodated in a suitable place in the vicinity of
the SMCS (tent, building, container, etc).
The semi-mobile central station (SMCS)
is equipped with all the necessary technical requirements for setting up the
microwave links to the SMSRs. This cre-
ates a small system with relatively high
mobility for fulfilling tasks that are limited with respect to time and space.
Integration of portable mobile stations
In addition to the shelter-based SMSRs,
the Tactical Interception and Direction
Finding Systems R&S ® TMSR [*] can
be integrated in a radiomonitoring and
radiolocation system. An R&S ® TMSR can
be easily installed in an off-road vehicle
or also indoors (FIG 9).
8
MIL NEWS · 7/2003
s
SR
SR
CH
◆ The individual station types are com-
pletely documented, tried and tested
in practice and equipped with all
required hardware and software components. The delivery period is therefore considerably shorter.
◆ The components (station types) are
harmonized to each other, allowing
users to configure custom-made solutions in a short time.
◆ The flexible data communication is
prepared for a wide range of different
infrastructure conditions.
Holger Megow
More information and data sheet at
www.rohde-schwarz.com
REFERENCES
[*] Technical Information available on request.
MSR
Microwave
link
(128 kbit/s)
M
M
n different analog telephone line
M
FIG 6 Control of remote regional subsystems via a central station (FCS).FIG 7 Stationary central station (FCS) for controlling a number of regional subsystems.
SMSR
SMSR
SMSR
SMCS
LAN
or FO link
Additional operator
positions
SMSR
SMSR
SMSR
Microwave
link
(128 kbit/s)
SMCH
FCS
FIG 8 Small semi-mobile system.
FIG 9 Tactical Interception and Direction Finding System R&S ® TMSR.
MIL NEWS · 7/2003
9
VHF/UHF Airborne Transceivers R&S ® M3AR
Secure and jam-resistant radio links
for UAVs
Due to the availability of powerful
onboard computers and reliable
radio links, unmanned aerial vehicles
(UAVs) are gaining in importance
with armed forces. Rohde & Schwarz
is contributing to this very promising
development with its R&S ® M3AR
airborne transceivers in various pilot
projects.
COMMUNICATION
UAVs: unmanned, versatile and
efficient
The scope of currently deployed UAVs
ranges from mini-UAVs with a wing
span of just a few centimeters all the
way up to unmanned fighter aircraft
and research UAVs with a span width of
80 meters. The military missions they are
used in are diverse. UAVs are very effectively deployed primarily in intelligence,
reconnaissance, surveillance, fire control, combat missions, information transmission, electronic warfare or support
with target acquisition. FIG 1 on the next
page shows the German Army’s future
TAIFUN combat UAV (CUAV) from STN
ATLAS Elektronik.
Aircraft size and missions vary just as
much as duration and altitude of the
flight or payload of the individual types.
Common to them all, however, is the
need for secure, jam-resistant radio links
for communication.
Telemetry data in realtime
Depending on their mission, UAVs are
equipped with a wide variety of different sensors, e.g. radar, target acquisi-
tion lasers, video or electronic thermal
imaging cameras. The data obtained
should already be directly available to
the operational forces during the flight,
preferab ly in realtime and via jam-resis-
tant data links.
43722/3
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MIL NEWS · 7/2003
In addition to the standardized NATO
methods HAVE QUICK or SATURN, the
R&S ® M3AR transceivers also offer the
proprietary frequency hopping method
SECOS, which ensures a high data transmission rate even with numerous frequency changes per second. Compressed images and image sequences
can thus be transmitted with a delay of
only a few seconds – a level of performance far superior to data transmission
via shortwave.
Although satellite links offer broader
radio coverage and possibly even higher
data transmission rates compared to
the VHF/UHF range, they are relatively
unprotected from jammers and therefore
not always able to ensure interruptionfree radio links. Moreover, satellite links
are not always available everywhere at
all times.
Photo: STN ATLAS Elektronik
FIG 1 TAIFUN – the German Army’s future CUAV.
Satellite or radio links act as transmis-
sion media in the HF range or, with line
of sight, the VHF/UHF range (FIG 2).
Depending on the number of sensors
and the data volume to be transmitted, it
may be necessary to use several parallel
radio lines.
Up to now, the software-defined air-
borne transceivers of the R&S ® M3AR
family were mainly deployed in manned
platforms; however, owing to their flex-
ible architecture, they are also ideal
for use in UAVs. Particularly outstand-
ing are the R&S ® M3AR units of the
R&S ® MR6000R series. Compared to
international competitor products and
shortwave transceivers, the extremely
compact design and low weight of
these units ideally comply with the tight
restrictions imposed on UAV payload
and stowage recess (FIG 3).
Efficient encryption plus frequency hopping are necessary to ensure reliable
and jam-resistant data transmission.
FIG 2
Block diagram of
data exchange with
UAVs.
UAV
Telemetry & data
Relay UAV
Communication & navigation
Telemetry
Ground station (control)
MIL NEWS · 7/2003
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