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

• 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

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

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

Bandwidth

Electromagnetic wave polarization

Frequency response

Mobile communication

Sensor arrays

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)