Suppression of noise and narrowband interference in UWB indoor channel measurements

Author

Irahhauten, Zoubir ; Yarovoy, Alex ; Janssen, Gerard J M ; Nikookar, Homayoun ; Ligthart, Leo P.

Author_Institution

Dept. of Electr. Eng., Mathematics & Comput. Sci., Delft Univ. of Technol., Netherlands

fYear

2005

fDate

5-8 Sept. 2005

Firstpage

108

Lastpage

112

Abstract

In this paper, the impact of the noise due to undersampling of noncoherent narrowband interference in time domain UWB channel measurements is investigated. Different measurements were carried out within the building for LOS and NLOS situations. The obtained results show that energy of external narrowband interference (especially at frequencies below 3.1 GHz) is spread over the whole measured bandwidth (1-12 GHz) as a quasi-white noise. This spreading is caused by the stroboscopic sampling receiver used in the measurement setup. The level of this additional noise is relatively high and its suppression is required for long-distance measurements. Suppression of the narrowband interference by an analogue bandpass filter directly after the receive antenna substantially decreases the noise floor and results in a large improvement of the signal-to-noise ratio.

Keywords

band-pass filters; indoor radio; interference suppression; telecommunication channels; ultra wideband communication; 1 to 12 GHz; UWB indoor channel measurements; bandpass filter; external narrowband interference; narrowband interference; noise suppression; quasi-white noise; stroboscopic sampling receiver; Antenna measurements; Bandwidth; Energy measurement; Frequency measurement; Interference suppression; Narrowband; Noise measurement; Sampling methods; Signal to noise ratio; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultra-Wideband, 2005. ICU 2005. 2005 IEEE International Conference on

Print_ISBN

0-7803-9397-X

Type

conf

DOI

10.1109/ICU.2005.1569967

Filename

1569967