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 Second-Order Optimal Array Receivers for Synchronization of BPSK, MSK, and GMSK Signals | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 45605 16 pages doi 2007 45605 Research Article Second-Order Optimal Array Receivers for Synchronization of BPSK MSK and GMSK Signals Corrupted by Noncircular Interferences Pascal Chevalier Francois Pipon and Francois Delaveau Thales-Communications EDS SPM 160 Bd Valmy 92704 Colombes Cedex France Received 4 October 2006 Revised 16 March 2007 Accepted 13 May 2007 Recommended by Benoit Champagne The synchronization and or time acquisition problem in the presence of interferences has been strongly studied these last two decades mainly to mitigate the multiple access interferences from other users in DS CDMA systems. Among the available receivers only some scarce receivers may also be used in other contexts such as F TDMA systems. However these receivers assume implicitly or explicitly circular or proper interferences and become suboptimal for noncircular or improper interferences. Such interferences are characteristic in particular of radio communication networks using either rectilinear or monodimensional modulations such as BPSK modulation or modulation becoming quasirectilinear after a preprocessing such as MSK GMSK or OQAM modulations. For this reason the purpose of this paper is to introduce and to analyze the performance of second-order optimal array receivers for synchronization and or time acquisition of BPSK MSK and GMSK signals corrupted by noncircular interferences. For given performances and in the presence of rectilinear signal and interferences the proposed receiver allows a reduction of the number of sensors by a factor at least equal to two. Copyright 2007 Pascal Chevalier 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 The synchronization and or time .
