New Burst Modem For LEO Satellites

Author

Chen Xiaoting ; Gong Wenbin

Author_Institution

Shanghai Inst. of Micro-Syst. & Inf. Technol., Chinese Acad. of Sci., Shanghai

fYear

2008

fDate

12-14 Oct. 2008

Firstpage

1

Lastpage

3

Abstract

Frame efficiency is key point for burst communication systems, and long-time preamble is needed for LEO satellite DSSS signal acquisition and coherent synchronization caused by large range Doppler shift. Many papers do works on shortening 2-dimension acquisition by using FFT or shortening convergence time by using adaptive loop filter bandwidth. In this paper a new modem is proposed, which eliminates the preamble spent by synchronization process definitely, and improves burst frame efficiency markedly.

Keywords

Doppler shift; fast Fourier transforms; satellite communication; spread spectrum communication; synchronisation; DSSS signal acquisition; LEO satellites; adaptive loop filter bandwidth; burst communication systems; burst frame efficiency; burst modem; coherent synchronization; convergence time; fast Fourier transform; large range Doppler shift; synchronization process; Artificial satellites; Automatic frequency control; Convergence; Frequency synchronization; Low earth orbit satellites; Modems; Phase locked loops; Quadrature phase shift keying; Signal processing algorithms; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on

Conference_Location

Dalian

Print_ISBN

978-1-4244-2107-7

Electronic_ISBN

978-1-4244-2108-4

Type

conf

DOI

10.1109/WiCom.2008.411

Filename

4678320