Operational Description and Users Manual

FCC ID: OAYARS100-3

Operational Description

Download: PDF

FCCID_177534

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

Technical Characteristics of the
A.D.C. Radar System ARS100-3

Issue 1.0

1. GENERAL DESCRIPTION 2

2. TECHNICAL CHARATERISTICS 4

2.1. System Key Features 4

2.2. Detection Performance 5

2.3. Electrical Interfaces 6
2.3.1. Electronic Control Unit 6
2.3.2. Interface Frontend - ECU 7

2.4. Environmental Conditions 8
2.4.1. Electronic Control Unit 8
2.4.2. Radar Frontend 8

2.5. Self Diagnostic Functions 8

2.6. Mechanical dimensions 9
2.6.1. Radar frontend 9
2.6.2. Electronic Control Unit 10

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 1 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

1. General Description

The A.D.C. automotive radar system for autonomous intelligent cruise
control (AICC) and collision warning monitors the traffic area in front of the
vehicle using three stationary independent millimeter wave radar beams.
Moving and stationary objects are detected and their distance and relative
velocity is measured and processed continuously.
Sixteen times per second the actual traffic situation is analyzed by a digital
signal processor within the ECU supplying information to engine control
and brake systems in order to operate the vehicle in a distance controlled
mode referenced to the relevant object ahead. In case of critical situations
a warning can be given to the driver in order to enhance his reaction time.
Due to its physical nature the radar sensor is offering excellent
performance characteristics even in adverse weather conditions (fog, rain
and snow).
Additional information of vehicle driving conditions is required from
standard or specialized in-vehicle sensors, e.g. speed, steering angle
and/or yaw rate. This data is made available to the ECU via a universal
car network (e.g. CAN) or specific interface circuits.
System hardware configuration is characterized by a two box design with
a radar sensor (front end) mounted in the front of the car, typically behind
the radiator, and a related Electronic Control Unit in an arbitrary location.
Car specific demands and cost issues may lead to a one box solution in
the future.
Packaging of the radar frontend is self-contained and the unit is applicable
in space critical vehicle environments. The antenna design is based on a
monostatic patented reflector arrangement offering optimum mechanical
dimensions.
A block diagram of the system is shown in fig.1

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 2 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 3 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

2. Technical Charateristics

2.1. System Key Features
Table 1 summarizes technical key features on system level.

Parameter Value

Operating Frequency 76 ... 77 GHz
Modulation Principle FM - Pulse Doppler
Average Output Power 200 µW
Beams three beams with 3.4 ° each
Number of Objects up to 20
Range 0.5 .... 150 m
Range resolution 1 m (between 7 and 150 m)
Relative velocity -50 .... 200 km/h
Velocity resolution 1 km/h
Angle Resolution 0.5 °
Processing cycle time 66 ms

Table 1 : Technical Key Features

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 4 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

2.2. Detection Performance
The basic data detection requirement is to measure distance, relative
speed, and reflection signal amplitude of moving and stationary objects in
three beams. Angular target position is calculated by interpolation
algorithms based on signal levels in adjacent beams.
Some technical data of detection performance is summarized in table 2.

Parameter Value

Antenna beam width azimuth 10.2° (-3dB)
Antenna beam width elevation 3.0° (-3dB)
Range gates 30 per beam , 5m long
Target separation 5 m in longitudinal direction
Multiple target capability up to 20
Min. detectable radar cross section 100 m : 1 qm²
150 m : 10 qm²
Max. detectable radar cross section 50 ... 150 m: 10000 qm²
5 ... 150 m: 100000 qm² (saturated)

Table 2 : Detection Performance

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 5 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

2.3. Electrical Interfaces

2.3.1. Electronic Control Unit

Connector 3a Connector 4a
2 Connector 1a
1 5 8 5 8
View on the ECU
1 4 1 4
A B

Operating input voltage: 9 V ... 32 V
Reverse polarity protection : Yes
Input current : < 2A
Short circuit protection : all inputs/output against ground and Vbatt
Vehicle data interface: AMP Micro Quadlock (8 pins)
Frontend data interface: AMP Micro Quadlock (8pins)

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 6 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

2.3.2. Interface Frontend - ECU
Signals between frontend and electronic control unit are transferred via
two cables (cable A, cable B). Via cable B additionally the power for the
frontend is supplied.

2 IF
4 5 6
1

1 2 3
connector for cable A connector for cable B

The IF-Signal is transferred from the frontend FE to the electronic
control unit ECU.

IF- Signal : Coaxial (180 MHz) ,
IF-Frequency: 180 MHz + 20 MHz
IF-Bandwidth: 60 MHz min
IF-impedance: 50 Ohm
IF Return Loss: - 15 dB max
IF Peak Power: +10 dBm max
Data Connector AMP Micro Quadlock (6 pins)
Data (max. baudrate): 30 kBd
Power Supply: 15 V / 0.6 A (generated by ECU)
Ripple on VFE: 100 mV, if CFE > 100µF
Inrush current: 1.0 A max for 1 sec.

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 7 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

2.4. Environmental Conditions

2.4.1. Electronic Control Unit

Operating temperature range: -25°C ... + 70 °C
Storage temperature range: -40°C ... + 105 °C (+125°C for 180 min)

2.4.2. Radar Frontend

Operating temperature range: -25°C ... + 70 °C (full performance)
+70°C ... + 95 °C (sensor switched off)
Storage temperature range: -40°C ... + 105 °C (+125°C for 180 min)

2.5. Self Diagnostic Functions

Self diagnostic information is provided via a serial diagnostics interface
under following conditions :

- Frontend performance limitations or failures in different categories
- Harness defect between Frontend and ECU in different categories
- ECU internal failures

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 8 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

Mechanical dimensions :
Circular diameter : 100 mm
Height : 70 mm
Outer dimensions : 132 mm x 132 mm (without brackets)
Packaging requirements : IP 6k9
Weight (typical): 710 gr.

2.6.2. Electronic Control Unit

Mechanical dimensions: 225mm x 195mm x 45mm
Packaging requirements : IP 6k6
Weight : 885 gr.

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 10 September 17th, 2001

ACC pulse doppler radar system
A.D.C.
Technical Description Automotive Distance
Control Systems GmbH

Name Coding No. Name Input/Output Description
Connector 3a A 1 GND Output Ground reference potential
for the sensor
Connector 3a A 2 DATA- Bi-directional Serial interface between
control unit and sensor
Connector 3a A 3 Not utilised
Connector 3a A 4 VFE- Output Negative supply voltage for
the sensor
Connector 3a A 5 Not utilised
Connector 3a A 6 DATA+ Bi-directional Serial interface between
control unit and sensor
Connector 3a A 7 Not utilised
Connector 3a A 8 VFE+ Output Positive supply voltage for
the sensor
Connector 4a B 1 CANH Bi-directional High speed CAN-bus for
communication
Connector 4a B 2 DIAG Bi-directional Diagnostic bus (K-line)
Connector 4a B 3 Not utilised
Connector 4a B 4 KL87 Input Positive supply voltage
Connector 4a B 5 CANL Bi-directional High speed CAN-bus for
communication
Connector 4a B 6 Not utilised

Connector 4a B 7 Not utilised
Connector 4a B 8 KL31 Input Negative supply voltage
Connector 1a IF 1 IF+ Input 180 MHz-intermediate
frequency signal
Connector 1a IF 2 IF- Input High frequency grounding
connection

_________________________________________________________________________________________________________
Confidential: All rights reserved. This document may not be made available to third parties or duplicated without
prior agreement by A.D.C. Automotive Distance Control Systems GmbH. Any other dissemination, distribution
or copying is prohibited.

File: Description of ADC ARS100-3 radar system page 13 September 17th, 2001

Document Created: 2001-09-17 19:16:09
Document Modified: 2001-09-17 19:16:09

© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC