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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 Burst Format Design for Optimum Joint Estimation of Doppler-Shift and Doppler-Rate in Packet Satellite Communications | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 29086 12 pages doi 10.1155 2007 29086 Research Article Burst Format Design for Optimum Joint Estimation of Doppler-Shift and Doppler-Rate in Packet Satellite Communications Luca Giugno 1 Francesca Zanier 2 and Marco Luise2 1 Wiser S.r.l.-Wireless Systems Engineering and Research Via Fiume 23 57123 Livorno Italy 2 Dipartimento di Ingegneria dell Informazione University of Pisa Via Caruso 16 56122 Pisa Italy Received 1 September 2006 Accepted 10 February 2007 Recommended by Anton Donner This paper considers the problem of optimizing the burst format of packet transmission to perform enhanced-accuracy estimation of Doppler-shift and Doppler-rate of the carrier of the received signal due to relative motion between the transmitter and the receiver. Two novel burst formats that minimize the Doppler-shift and the Doppler-rate Cramer-Rao bounds CRBs for the joint estimation of carrier phase Doppler-shift and of the Doppler-rate are derived and a data-aided DA estimation algorithm suitable for each optimal burst format is presented. Performance of the newly derived estimators is evaluated by analysis and by simulation showing that such algorithms attain their relevant CRBs with very low complexity so that they can be directly embedded into new-generation digital modems for satellite communications at low SNR. Copyright 2007 Luca Giugno 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 Packet transmission of digital data is nowadays adopted in several wireless communications systems such as satellite time-division multiple access TDMA and terrestrial mobile cellular radio. In those scenarios the received signal may suffer from significant time-varying Doppler distortion due to .
