Design study for a CDMA-based LEO satellite network: downlink system level parameters

Author

Glisic, Savo G. ; Talvitie, Jaakko J. ; Kumpumaki, Timo ; Latva-aho, Matti ; Iinatti, Jari H. ; Poutanen, Torsti J.

Author_Institution

Telecommun. Lab., Oulu Univ., Finland

Volume

14

Issue

9

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

1796

Lastpage

1808

Abstract

The performance analysis of a new concept of a code-division multiple-access (CDMA) based low Earth orbit (LEO) satellite network for mobile satellite communications is presented and discussed. The starting point was to analyze the feasibility of implementing multisatellite and multipath diversity reception in a CDMA network for LEO satellites. The results are used to specify the design parameters for a system experimental test bed. Due to the extremely high Doppler, which is characteristic of LEO satellites, code acquisition is significantly simplified by using a continuous wave (CW) pilot carrier for Doppler estimation and compensation. The basic elements for the analysis presented are: the channel model, the pilot carrier frequency estimation for Doppler compensation, and multipath and multisatellite diversity combining

Keywords

Doppler effect; code division multiple access; diversity reception; frequency estimation; land mobile radio; mobile satellite communication; multipath channels; radio links; radio networks; CDMA based LEO satellite network; Doppler compensation; Doppler estimation; channel model; code acquisition; code division multiple access; continuous wave pilot carrier; design parameters; downlink system level parameters; low Earth orbit; mobile satellite communications; multipath diversity combining; multipath diversity reception; multisatellite diversity combining; multisatellite diversity reception; performance analysis; pilot carrier frequency estimation; system experimental test bed; Convolution; Demodulation; Downlink; Frequency diversity; Frequency estimation; Frequency shift keying; Interference; Low earth orbit satellites; Multiaccess communication; Signal design;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.545702

Filename

545702