RMS delay and coherence bandwidth measurements in indoor radio channels in the UHF band

Author

Varela, Mercedes Sánchez ; Sánchez, Manuel García

Author_Institution

ETSE Telecomunicacions, Vigo Univ., Spain

Volume

50

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

515

Lastpage

525

Abstract

A study of time dispersion in different indoor line-of-sight radio channels in the 492-862 MHz band is presented in this paper. A combined method to filter the noise in the measured impulse response is described. The effect of frequency windowing on the impulse responses and the root mean square (rms) delay spread is also investigated. It has been found that, in general, the use of windows with lower side-lobe levels yields larger values of the rms delay spread. The relation between the mean delay and the rms delay spread has also been studied for copolar and crosspolar channels. The dependence of the coherence bandwidth on the rms delay spread has been considered, and an inverse relation has been tested for both components

Keywords

delays; digital filters; digital radio; dispersive channels; indoor radio; interference suppression; radio links; radiofrequency interference; transient response; 492 to 862 MHz; UHF; coherence bandwidth; copolar channels; crosspolar channels; frequency windowing; impulse response; indoor radio channels; inverse relation; line-of-sight radio channels; rms delay spread; side-lobe levels; time dispersion; Antenna measurements; Bandwidth; Delay effects; Dipole antennas; Filters; Frequency measurement; Frequency response; Indoor radio communication; Root mean square; UHF measurements;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.923063

Filename

923063