TAILIEUCHUNG - Báo cáo hóa học: " Research Article A Time-Domain Fingerprint for BOC(m, n) Signals"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Time-Domain Fingerprint for BOC(m, n) Signals | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 56104 7 pages doi 2007 56104 Research Article A Time-Domain Fingerprint for BOC m n Signals B. Muth 1 P. Oonincx 1 and C. Tiberius2 1 Faculty of Military Sciences Netherlands Defence Academy Het Nieuwe Diep 8 1781 AC Den Helder The Netherlands 2 Department of Earth Observation and Space Systems DEOS Delft University of Technology Kluyverweg 1 2629 HS Delft The Netherlands Received 3 November 2006 Accepted 10 April 2007 Recommended by Sudharman Jayaweera Binary offset carrier BOC describes a class of spread-spectrum modulations recently introduced for the next generation of global navigation satellite systems GNSSs . The design strategies of these BOC signals have so far focused on the spectral properties of these signals. In this paper we present a time-domain fingerprint for each BOC signal given by a unique histogram of counted time elapses between phase jumps in the signal. This feature can be used for classification and identification of BOC-modulated signals with unknown parameters. Copyright 2007 B. Muth et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION In the scope of emerging radionavigation satellite systems the binary offset carrier BOC modulation is of special interest. The new generation of global navigation satellite systems GNSSs modernized GPS 1 and the European Galileo system 2 will use BOC or BOC-based signals on different carriers and with different parameters to enable ranging. The main reasons for creating BOC signals were on one hand the need to improve traditional GNSSs signals properties for better resistance to multipath interferences of all kinds and receiver noise 3 4 and on the other hand the need for improved spectral sharing of the allocated .

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