Title :
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
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;
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
DOI :
10.1109/WiCom.2008.411
