Operation Principle Of The Cr5Cbcc; User Information; General Description - Bosch CR5CBCC User Manual

From
XC-DA/ECR3-Bp
Report
Issue 1.0
Topic CR5CBCC User Manual

Operation principle of the CR5CBCC

3
The radar sensor's main task is to detect objects and measure their speed and position relative
to the movement of the vehicle in which it is mounted.
To do this, the CR5CBCC senses targets by emitting many short frequency modulated waves
using the transmit antennas while receiving waves reflected by targets using the receive
antennas.
Distance and relative speed are determined via beat frequency (due to travelling time of the
waves) and phase differences between ramps (due to change of distance in short time). By
using the antenna diagram the angles of departure and arrival of the radar waves can be
determined.
Using the Bosch chirp sequence radar modulation, the CR5CBCC allows unambiguous
determination of relative speed in a single measurement cycle. Therefore, no complex object
models are needed for ambiguity resolution.
The radar reflections (strength, distance and relative speed, angular direction, and derived
values) are basis for building a comprehensive model of the sensed environment.

User information

4
4.1

General description

The CR5CBCC radar sensor and control unit (SCU) contains a FMCW radar transceiver
operating in the globally harmonized frequency range of 76.0 - 77.0 GHz. It senses targets by
emitting many short frequency modulated waves using the transmit antennas while receiving
waves reflected by targets using the receive antennas. Distance and relative speed are
determined via beat frequency (due to travelling time of the waves) and phase differences
between ramps (due to change of distance in short time). By using the antenna diagram, the
angles of departure and arrival of the radar waves can be determined.
Using the Bosch chirp sequence radar modulation, the CR5CBCC allows unambiguous
determination of relative speed in a single measurement cycle. Therefore, no complex object
models are needed for ambiguity resolution. The radar reflections (strength, distance and
relative speed, angular direction, and derived values) are basis for building a comprehensive
model of the sensed environment.
Fitted in corners of the vehicle, the CR5CBCC monitors continuously vehicle surroundings,
supporting driver and vehicle systems at turning or lane change manoeuvers. While fitted in
Our Reference
Daniel Radics
Tel
+36 1 879-6276
CR5CBCC_User_manual.docx
Budapest
10 June 2021
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