Profile
Complex modulation techniques, intelligent antenna systems, and the efficient usage of the available frequency bands are needed to enable the steadily increasing data rates. Measurements traceable to the SI units, as established for base quantities such as RF power, are much more difficult to achieve for the measurement quantities of digital high-frequency communication systems. An exemplary quantity is the error vector magnitude (EVM) which is one of the key parameters for the transmission quality between transmitter and receiver of digital communications and thus critical for the achievable data rates.
Channel sounding techniques can be used for optimized design and operation of communication systems with high performance. This is especially important for millimeter wave communication systems, where high path loss and scattering at reflective objects lead to complex and rapidly changing multi-path scenarios. This channel must be considered for reliable and efficient use of the available spectrum.
The working group has the task of realizing traceable measurements of the high-frequency characteristics in digital communication systems. The main goal is the development of suitable measurement techniques and the establishment of calibration services, which are demanded for the increasing requirements of quality management.
Research/Development
The working group performs research in the following areas:
- Metrology for digitalization
- Assessment of uncertainty for the calibration of intelligent antenna arrays
- Characterization of measurement systems and procedures for THz communication systems in the DFG research unit METERACOM
- Improving the resilience of wireless networks in industry environments within the project Gemimeg-II
Services
Information
In cooperation with the working groups Electromagnetic Fields and Antenna Measuring Techniques (2.21) and Femtosecond Measurement Techniques and Nanomagnetism (2.52) we are working on the traceable calibration of broadband real-time oscilloscopes and microwave arbitrary waveform generators using PTBs electro-optical sampling system.