Performance analysis of applying up-link estimates in the down-link beamforming using a dual polarized array

Author

Lindmark, Bjorn ; Ahlberg, Mikael ; Nilsson, Martin ; Beckman, Claes

Author_Institution

Allgon Syst. AB, Taby, Sweden

Volume

2

fYear

2000

fDate

2000

Firstpage

690

Abstract

Most of the current and future mobile communications systems are frequency duplex systems, i.e. the up- and down-link are separated in frequency. Since the effect of the radio channel is not constant with frequency, this potentially limits the capacity gain using adaptive antennas. We use 150 MHz measurement data to simulate adaptive beamforming in a suburban environment. The information from the up-link at 1741 MHz is used for beamforming at this frequency as well as on the down-link at 1839 MHz. Our results show a reduction in C/I improvement of up to 10 dB between the up- and down-link

Keywords

UHF radio propagation; adaptive antenna arrays; array signal processing; channel capacity; direction-of-arrival estimation; electromagnetic wave polarisation; land mobile radio; radio links; radiofrequency interference; 150 MHz; 1741 MHz; 1839 MHz; C/I improvement; DOA; adaptive antennas; adaptive beamforming; capacity gain; down-link beamforming; dual polarized array; frequency duplex systems; measurement data; mobile communications systems; performance analysis; radio channel; suburban environment; up-link estimates; Adaptive arrays; Antenna arrays; Antenna measurements; Array signal processing; Bandwidth; Electromagnetic wave polarization; Frequency response; Mobile communication; Performance analysis; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851213

Filename

851213