ELIKO Competence Centre in Electronics-, Info- and Communication Technologies, Tallinn University of Technology;
Olev Märtens, Alar Kuusik, Aivar Liimets;
Priority number: EE200700005; Priority date: 23.01.2007

Possible applications: ISO18000-6 and EPC readers and other solutions, where FM0 , bi-phase or differential Manchester decoding is used.
Goal of the invention: improvement of decoding in noise (so using less power or longer distance!)
by better synchronisation.
Prototope: OMAP-based terminal hardware, decoding algorithm realised as C/C++ code of DSP

Abstract:
Method and device for synchronization of a decoder of a RFID receiver, including calculation of the first correlation of the digitized received signal  with the first- preamble-shaped -reference signal, and in parallel - calculation of the second correlation  with second reference signal, derived from the preamble. Synchronized state is determined by the approximate maximum of the first correlation signal and the minimum absolute value of the second correlation signal. Precise synchronization is achieved by re-sampling of the first and second  reference  signals,  by correcting  the  starting point  of   the  first  and  second  reference  signals,  and sampling period, calculated from the first and second correlation signals. Reasonable could be using of the fragment  of the first  and second reference signals (derived from the preamble) in the initial phase of the synchronization process. Reasonable is also extension of the first and second reference signals according  to decoded   symbols.   Reasonable   could   be   using   of   one-pass   or   iterative   calculation   of   the   correction parameters.

Invention: Non-uniform sampling and demodulation for wideband multi-frequency bioimpedance measurements; Owner: Tallinn University of Technology; Authors: Mart Min, Jurijs Artjuhs, Paul Annus, Raul Land, Olev Märtens, Ivars Bilinskis; Priority number: US60912233; Priority date: 17.04.2007 

Other Patents 

• International Patent Application : WO2005/122889 A1 (Date of publication: 29.12.2005). Simultaneous discrete-time analysis of features of substances. Authors: M.Min, R.Land, T.Parve, O.Märtens, A.Ronk. Owner: Tallinn University of Technology.
• US provisional Patent application: A method and device for simultaneous analysis of multi-carrier signal; Authors: Mart Min, Raul Land, Toomas Parve, Olev Märtens, Ants Ronk; US60/580831; Owner: Tallinn University of Technology.
• US Patent application: Non-uniform sampling and demodulation for wideband multi-frequency bioimpedance measurements; Authors: Mart Min, Jurijs Artjuhs, Paul Annus, Raul Land, Olev Märtens, Ivars Bilinskis US60912233; Owner: Tallinn University of Technology.
• International Patent Application: Method and device for multichannel multifrequency analysis of an object,; Authors: M.Min, P.Annus, A. Haapalainen, A. Kuusik, R. Land, T.Parve, A. Ronk; International publication number WO2007/121756 A2, Priority date : 24.04.2006, Owner ELIKO.
• Estonian Patent Application, Symmetrical current source, Authors: P.Annus, R.Kipper, Priority number P200700045, Priority date: 29.08.2007, Owner ELIKO.
• Estonian Patent application, Invention No. EE 00542 U1 / Priority No. U200500050.

• US provisional application US61/103061(2008). Wideband impedance analyzer. Inventors: Mart Min, Toivo Paavle, Raul Land, Paul Annus, Toomas Parve. Owners: Tallinn University of Technology, ELIKO Competence Centre in Electronics-, Info- and Communication Technologies. US Application filed: 06.10.08 (unpublished).

• US provisional application US61/052467(2008). Method and device using shortened square wave waveforms in synchronous signal processing. Inventors: Paul Annus, Mart Min, Jaan Ojarand. Owner: Tallinn University of Technology, ELIKO Competence Centre in Electronics-, Info- and Communication Technologies. Application filed: 12.05.08 (unpublished).

• International Publication WO2008125125 (2008), published 23.10.08. Data acquisition from nonuniform arrays based on sine-wave crossings. Inventors: Ivars Bilinskis, Mart Min, Aleksandrs Ribakovs. Owner: Tallinn University of Technology.

• International Publication WO2008125124 (2008), published 23.10.08. Non-uniform sampling and demodulation for wideband multi-frequency bioimpedance measurements. Inventors: Ivars Bilinskis, Mart Min, Jurijs Artjuhs, Paul Annus, Raul Land, Olev Märtens. Owner: Tallinn University of Technology.
• International Publication WO2007121756 (2007), published 01.11.07. Method and device for multichannel multifrequency analysis of an object. Authors: Alar Kuusik, Ants Ronk, A. Haapalainen, Mart Min, Paul Annus, Raul Land, Toomas Parve. Owner: ELIKO Tehnoloogia Arenduskeskus OÜ.
• US Patent Application US2008058882 A1 (2008), published 06.03.08. Device and method for monitoring cardiac pacing rate. Authors: Andres Kink, Indrek Rätsep, Mart Min, Toomas Parve. Owner: SmartImplant OÜ.