Spatial channel characterisation of FDD wireless links

Author

Allen, B. ; Beach, M. ; Karlsson, P.

Author_Institution

Bristol Univ., UK

fYear

2001

fDate

2001

Firstpage

68

Lastpage

72

Abstract

For smart antenna deployments in frequency division duplex (FDD) applications the downlink weight vector can be derived from the uplink steering vector. However, this assumes a degree of correlation between these channels. It is shown here that de-correlation between uplink and downlink power azimuth spectrums (PAS) is significant for frequency offsets as small as 5 MHz in urban environments, with this increasing to 15 MHz when long term averaging is applied. Results reported here are computed from measured data taken within the UMTS (Universal Mobile Telecommunications System) frequency band for a cluttered urban environment

Keywords

adaptive antenna arrays; clutter; correlation methods; decorrelation; land mobile radio; radio links; radiowave propagation; telecommunication channels; 15 MHz; 5 MHz; FDD applications; FDD wireless links; UMTS frequency band; Universal Mobile Telecommunications System; channel correlation; cluttered urban environment; de-correlation; downlink power azimuth spectrum; downlink weight vector; frequency division duplex applications; frequency offsets; long term averaging; propagation measurement; smart antenna; spatial channel characterisation; uplink power azimuth spectrum; uplink steering vector; urban environments;

fLanguage

English

Publisher

iet

Conference_Titel

3G Mobile Communication Technologies, 2001. Second International Conference on (Conf. Publ. No. 477)

Conference_Location

London

ISSN

0537-9989

Print_ISBN

0-85296-731-4

Type

conf

DOI

10.1049/cp:20010014

Filename

923510