Experimental Evaluation of Man-Made Noise for Cryogenic Receiver Front-End

Author

Narahashi, Shoichi ; Satoh, Kei ; Suzuki, Yasunori ; Mimura, Tetsuya ; Nojima, Toshio

Author_Institution

NTT DoCoMo, Yokosuka

fYear

2007

Firstpage

2035

Lastpage

2039

Abstract

A cryogenic receiver front-end (CRFE) is anticipated to be an effective way to achieve efficient frequency utilization and to improve the sensitivity of mobile base station receivers. The CRFE comprises a superconducting filter, a cryogenic low- noise amplifier, and a highly reliable cryostat. Evaluating man- made noise as well as thermal noise is indispensable in order to investigate the effect of employing the CRFE. This paper presents measured results of man-made noise in urban and suburban areas in the 2-GHz band when applying the amplitude probability distribution method. The measured results suggest that the contribution of man-made noise in the 2-GHz band can be ignored as far as the Wideband Code Division Multiple Access (W-CDMA) system is concerned. The man-made noise is also measured in the VHF-band for comparison with the 2-GHz band environment.

Keywords

mobile communication; superconducting filters; thermal noise; amplitude probability distribution method; cryogenic receiver front-end; frequency utilization; man-made noise; mobile base station receivers; thermal noise; Area measurement; Base stations; Cryogenics; Frequency; Low-noise amplifiers; Multiaccess communication; Noise measurement; Superconducting device noise; Superconducting filters; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th

Conference_Location

Baltimore, MD

ISSN

1090-3038

Print_ISBN

978-1-4244-0263-2

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2007.427

Filename

4350076