Schaltungstheoretische Methoden in der Kommunikationstheorie

• Applicant: Professor Dr. Josef A. Nossek
• Subject Area: Electronic Semiconductors, Components and Circuits, Integrated Systems, Sensor Technology, Theoretical Electrical Engineering
• Term: from 2012 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 230297658

• Final Report Year: 2016

Final Report Abstract

A new matching strategy for receivers has been developed, which maximizes the sensitivity of a receiver, i.e. provides a required minimum SNR with the lowest possible receive signal energy with a given low noise amplifier (LNA). This is a new compromise between power matching, which provides maximum signal energy and noise matching, which provides maximum SNR. Depending on the parameters of the LNA and the required minimum SNR for a specific service, neither power nor noise matching may provide the best sensitivity of the receiver. In such situations the proposed approach is optimum. For designing an optimum matching twoport, one has to know the stochastic an deterministic parameters of the LNA. These are the variances of the equivalent input noise voltage and current and their complex correlation coefficient as well as the scattering matrix or any other twoport matrix of the LNA. A new method to characterize the above mentioned stochastic parameters has been developed and tested. Future work will aim at extension of the matching network for antenna arrays.

Publications

• ”Estimation of noise parameters in multi- antenna receivers using digitized samples,” in WSA 2013 - 17th International ITG Workshop on Smart Antennas, 2013
  M. Ivrlac, B. Lehmeyer, J. Nossek, C. Hofmann, and B. Lankl
  
• The multiport communication theory, IEEE Circuits and Systems Magazine, vol. 14, no. 3, pp. 2744, 2014
  M. T. Ivrlac and J. A. Nossek
  (See online at https://doi.org/10.1109/MCAS.2014.2333618)
• ”On matching strategies for wireless receivers,” in Smart Antennas (WSA), 2014 18th International ITG Workshop, March 2014, pp. 16
  B. Lehmeyer, M. T. Ivrlac, A. Mezghani, J. A. Nossek, and B. Lankl
  
• B. Lehmeyer, M. T. Ivrlac, and J. A. Nossek, ”LNA noise parameter measurement,” in Circuit Theory and Design (ECCTD), 2015 European Conference, Aug 2015, pp.1 4
  
  
• ”LNA Characterization Methodologies,” International Journal of Circuit Theory and Applications, Vol 45 Issue 9, September 2017, Pages 1185-1202
  B. Lehmeyer, M. T. Ivrlac and J. Nossek
  (See online at https://doi.org/10.1002/cta.2276)