Accurate Sine-Wave Amplitude Measurements Using Nonlinearly Quantized Data

The estimation of the amplitude of a sine wave from the sequence of its quantized samples is a typical problem in instrumentation and measurement. A standard approach for its solution makes use of a least squares estimator (LSE) that, however, does not perform optimally in the presence of quantization errors. In fact, if the quantization error cannot be modeled as an additive noise source, as it often happens in practice, the LSE returns biased estimates. In this paper, we consider the estimation of the amplitude of a noisy sine wave after quantization. The proposed technique is based on a uniform distribution of signal phases and it does not require that the quantizer has equally spaced transition levels. The experimental results show that this technique removes the estimation bias associated with the usage of the LSE and that it is sufficiently robust with respect to small uncertainties in the known values of transition levels

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2015

PrefaceThroughout her more than 200 years of existence, one of the major missions of the Budapest University of Technology and Economics is to spearhead modern technological developments. This is especially true for the Faculty of Electrical Engineering and Informatics (VIK), where the only way to pursue excellence is to be the regional leader in research and development in the quickly changing fields of electronics, IT and computer science. In order to maintain the level of excellence, innovative solutions and expertise are needed where engineering applications are combined with sound scientific results. Therefore, the faculty has its strength both at applied and at basic research. This research potential is connected to the international academic and industrial networks, i.e. VIK is actively participating in various communities, clusters and innovation networks. Because of the high scientific quality of the staff, several departments and research groups are represented in key international and national communities and innovation networks. The long lasting collaboration with our industrial partners has made it clear that the industry expects methods and results, which make their processes more effective and increase productivity and quality. Being present as an active partner in key research and innovation areas, highly contribute to the competitive edge and continuous development of VIK. These factors have positioned VIK as a significant source of knowledge transfer and a treasured partner in various cooperation activities.The current paper gives a brief account of the results achieved at the Faculty of Electrical Engineering and Informatics in the year 2015 and, at the same time, tries to encompass the research activities conducted at different departments. As a result, each individual section introduces a department and summarizes the corresponding results. This organization of the paper is also in accordance with our view, that the strength and excellence of the faculty originates from the innovative research groups working at departmental level. Hence, these teams, departments and their various expertise amount to make VIK a leading organization in ICT.In this light, we believe that this paper proves to be an informative summary about our scientific and technological contributions made in the year 2015.László Vajta, Dean of BME VIKJános Levendovszky, Deputy Dean of BME VI