A low additive noise interference canceller for high sensitivity applications

Author

Raghavan, Anand ; Chandramouli, Soumya ; Gebara, Edward ; Laskar, Joy

Author_Institution

Georgia Inst. of Technol., Atlanta

fYear

2008

fDate

22-24 Jan. 2008

Firstpage

45

Lastpage

48

Abstract

A canceller is designed to suppress undesired interference in an 802.11b WLAN radio from a Bluetooth radiator operating close to it. The design utilizes 0.18 mum CMOS IC technology. The system consists of a core that emulates the interference-coupling channel between the two radios by time domain amplitude and phase alignment, and filtration. This is controlled by an adaptive loop. Using low noise design principles, the canceller core maintains a low output noise power spectral density of -173 dBm/Hz at the center frequency of the WLAN band. The consequent degradation of WLAN receiver sensitivity is 2.7 dB while achieving at least 15 dB of interference suppression. The canceller core dissipates 20 mW of power.

Keywords

Bluetooth; CMOS integrated circuits; integrated circuit design; interference suppression; radio receivers; wireless LAN; 802.11b WLAN radio receiver; Bluetooth radiator; CMOS IC design technology; interference-coupling channel; low additive noise interference canceller; power 20 mW; size 0.18 mum; time domain amplitude alignment; time domain phase alignment; Additive noise; Bluetooth; CMOS integrated circuits; CMOS technology; Filtration; Integrated circuit noise; Interference cancellation; Interference suppression; Noise cancellation; Wireless LAN; Bandpass filters; broadband amplifiers; directional couplers; sensitivity; spectral analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium, 2008 IEEE

Conference_Location

Orlando, FL

Print_ISBN

978-1-4244-1462-8

Electronic_ISBN

978-1-4244-1463-5

Type

conf

DOI

10.1109/RWS.2008.4463424

Filename

4463424