A CMOS single-chip wireless solution with an adaptive purity-control scheme against ISM-band interferences

The authors present a Bluetooth (BT) single-chip solution to improve the immunity to ISM-band interferences. A transceiver with a purity-controllable local oscillator is proposed. The purity control scheme is experimentally verified through the firmware which controls the interference-transfer function and adjusts the allowable interference level adaptively. This solution is fully integrated in a 0.25-/spl mu/m CMOS process, and it satisfies the specification of the BT v1.2, with the optimal power consumption and the yield enhancement.

[1]  A. Abidi,et al.  Physical processes of phase noise in differential LC oscillators , 2000, Proceedings of the IEEE 2000 Custom Integrated Circuits Conference (Cat. No.00CH37044).

[2]  Andrea Conti,et al.  Bluetooth and IEEE 802.11 coexistence: analytical performance evaluation in fading channel , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  Jozef Modelski,et al.  Experimental Results of Testing Interferences in 2.4 GHz ISM Band , 2003, 2003 33rd European Microwave Conference, 2003.

[4]  Behzad Razavi,et al.  A low-power 2.4-GHz transmitter/receiver CMOS IC , 2003, IEEE J. Solid State Circuits.

[5]  Chun-Huat Heng,et al.  A 2.4-GHz dual-mode 0.18-/spl mu/m CMOS transceiver for Bluetooth and 802.11b , 2004, IEEE Journal of Solid-State Circuits.

[6]  Beomsup Kim,et al.  A low-phase-noise CMOS LC oscillator with a ring structure , 2000 .

[7]  Behzad Razavi,et al.  RF Microelectronics , 1997 .

[8]  Angela Doufexi,et al.  An investigation of the coexistence of 802.11g WLAN and high data rate Bluetooth enabled consumer electronic devices in indoor home and office environments , 2003, IEEE Trans. Consumer Electron..

[9]  Ivan Howitt,et al.  Bluetooth performance in the presence of 802.11b WLAN , 2002, IEEE Trans. Veh. Technol..

[10]  Behzad Razavi.  Design of intergrated circuits for optical communications , 2002 .

[11]  Aarno Parssinen.  Direct Conversion Receivers in Wide-Band Systems , 2001 .