Title :
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
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;
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
DOI :
10.1109/RWS.2008.4463424
