Title :
A proposal of SS communication system using LEO satellite for observing ecology of sea turtles
Author :
Tokuyasu, Tomohiro ; Wada, Tadahiro ; Yamazato, Takaya ; Katayama, Masaaki ; Ogawa, Akira
Author_Institution :
Dept. of Inf. Electron., Nagoya Univ., Japan
Abstract :
In this paper, we examine a system for observing the ecology of sea animals by means of a low Earth orbit satellite. We consider the system performance in the up-link, which is a communication link from the animal stations to the satellite. Since the up-link conditions are severe, we employ M-ary/SS with CDMA ALOHA as a multiple access scheme. A key issue to realize the system depends on an acquisition technique which is robust to the effect of large Doppler shift caused by the rapid movement of the low Earth orbit satellite. In this paper, we discuss code-acquisition and estimation of carrier frequency considering the M-ary/SS/CDMA technique to realize this system
Keywords :
Doppler shift; access protocols; code division multiple access; ecology; frequency estimation; radiotelemetry; satellite telemetry; spread spectrum communication; synchronisation; zoology; CDMA ALOHA; Doppler shift; LEO satellite; M-ary spread spectrum; M-ary/SS-CDMA; SS communication system; acquisition technique; animal stations; carrier frequency estimation; code-acquisition; communication link; ecology; multiple access scheme; sea animals; sea turtles; system performance; up-link; Artificial satellites; Doppler shift; Environmental factors; Frequency estimation; Low earth orbit satellites; Marine animals; Multiaccess communication; Proposals; Robustness; System performance;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.638508
