Digital front end for satellite LEO applications on W band

Publication Type  Conference Paper
Year of Publication  2002
Authors  Caponi, M.; Frescura, F.; Sereni, E.; Barbini, A.
Conference Name  IEEE 56th Vehicular Technology Conference, 2002 (VTC 2002-Fall)
Volume  4
Pagination  2308-2312
Conference Start Date  24/09/2002
Conference Location  Vancouver, BC, Canada
ISBN Number  0-7803-7467-3
ISSN Number  1090-3038
Accession Number  7574535
Key Words  digitale; dsp; front-end
Abstract  

We present an Earth digital receiver for LEO satellite applications in W band (80-90 GHz), in order to design an architecture robust to frequency offset. The maximum Doppler frequency is proportional to the relative speed and the carrier frequency, therefore in W band this value is large, approximately 2 MHz. According to this phenomenon, the recovery of the received signal carrier is very difficult. Starting from the IF (intermediate frequency) stage, we present a digital method to estimate and correct the Doppler-shift directly in the base band. In particular, we propose an innovative algorithm based on a two step Doppler-recovery. We also provide simulation results indicating the accuracy of this method and a prototype system (based around DSP C6416) for real time carrier recovery with unknown Doppler-shift.
URL  http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1040632
DOI  10.1109/VETECF.2002.1040632
Citation Key  304
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