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 Multicore Software-Deﬁned Radio Architecture for GNSS Receiver Signal Processing | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2009 Article ID 543720 10 pages doi 2009 543720 Research Article Multicore Software-Defined Radio Architecture for GNSS Receiver Signal Processing Heikki Hurskainen Jussi Raasakka Tapani Ahonen and Jari Nurmi Department of Computer Systems Tampere University of Technology P. O. Box 553 33101 Tampere Finland Correspondence should be addressed to Heikki Hurskainen Received 27 February 2009 Revised 22 May 2009 Accepted 30 June 2009 Recommended by Markus Rupp We describe a multicore Software-Defined Radio SDR architecture for Global Navigation Satellite System GNSS receiver implementation. A GNSS receiver picks up very low power signals from multiple satellites and then uses dedicated processing to demodulate and measure the exact timing of these signals from which the user s position velocity and time PVT can be estimated. Three GNSS SDR architectures are discussed. 1 A hardware-based SDR that is feasible for embedded devices but relatively expensive 2 a pure SDR approach that has high level of flexibility and low bill of material but is not yet suited for handheld applications and 3 a novel architecture that uses a programmable array of multiple processing cores that exhibits both flexibility and potential for mobile devices. We present the CRISP project where the multicore architecture will be realized along with numerical analysis of application requirements of the platform s processing cores and network payload. Copyright 2009 Heikki Hurskainen 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 Global navigation has been a challenge to mankind for centuries. However in the modern world it has become easier with the help from Global Satellite Navigation Systems GNSSs . NAVSTAR .