Title :
Experimental studies of using a smart antenna system in low-Earth-orbit satellite communications
Author :
Lin, H.-P. ; Jeng, S.S. ; Xu, G. ; Vogel, W.J.
Author_Institution :
Electr. Eng. Res. Lab., Texas Univ., Austin, TX, USA
Abstract :
Space division multiple access (SDMA) is one of the solutions for increasing system capacity as well as improving system performance in wireless communications. A series of experimental studies using a smart antenna system to exploit spatial diversity in terrestrial communications have been reported previously. However, using a smart antenna system and SDMA in the satellite-Earth propagation channel is another interesting topic for wireless communication. Estimates of the direction-of-arrival (DOA) of a satellite signal, studies of the variation of the spatial signature with frequencies, satellite location and motion, and diversity gain achieved by using an antenna array in both line-of-sight and shadowing scenarios are presented in this paper. For a typical environment of both line-of-sight (LOS) and shadowing cases, the experimental results show rich spatial diversity and diversity gain when using a smart antenna in low-Earth-orbit (LEO) satellite mobile and personal communications
Keywords :
antenna phased arrays; array signal processing; direction-of-arrival estimation; diversity reception; land mobile radio; mobile antennas; mobile satellite communication; multipath channels; personal communication networks; space division multiplexing; DOA estimation; LEO satellite systems; SDMA; antenna array; direction-of-arrival estimation; diversity gain; line-of-sight scenario; low-Earth-orbit satellite communications; mobile communications; personal communications; satellite-Earth propagation channel; shadowing scenario; smart antenna system; space division multiple access; spatial diversity; spatial signature variation; wireless communication; Antennas and propagation; Diversity methods; Frequency estimation; Low earth orbit satellites; Motion estimation; Multiaccess communication; Satellite antennas; Shadow mapping; System performance; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.596356