A Fully Integrated MIMO Multiband Direct Conversion CMOS Transceiver for WLAN Applications (802.11n)

802.11n is the latest offering from the IEEE standard committee tasked with enabling and enhancing WLAN systems. This standard utilizes several techniques to offer a much larger rate versus range than the legacy WLAN systems. A single-chip multiband direct-conversion CMOS MIMO transceiver (2times2) targeted for WLAN applications is presented. This transceiver is capable of satisfying the requirements of the draft 802.1 In standard and achieves PHY rates of > 270 Mb/s. The receivers and transmitters achieve an EVM of better than -41 dB (0.9%) and -40 dB (1.0%) operating in legacy g and a modes, respectively. From a 1.8 V supply and with both cores operating, the chip draws 275 mA in RX mode and 280 mA in TX mode.

[1]  A. Behzad,et al.  A Highly Linear Direct-Conversion Transmit Mixer Transconductance Stage with Local Oscillation Feedthrough and I/Q Imbalance Cancellation Scheme , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[2]  Hooman Darabi,et al.  A Fully Integrated MIMO Multi-Band Direct-Conversion CMOS Transceiver for WLAN Applications (802.11n) , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[3]  G. Chien,et al.  A fully-integrated dual-band MIMO transceiver IC , 2006, IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, 2006.

[4]  A. Behzad,et al.  A 4.92-5.845 GHz direct-conversion CMOS transceiver for IEEE 802.11a wireless LAN , 2004, 2004 IEE Radio Frequency Integrated Circuits (RFIC) Systems. Digest of Papers.

[5]  Ahmadreza Rofougaran,et al.  A 5-GHz direct-conversion CMOS transceiver utilizing automatic frequency control for the IEEE 802.11a wireless LAN standard , 2003, IEEE J. Solid State Circuits.

[6]  I. Mehr,et al.  A CMOS continuous-time G/sub m/-C filter for PRML read channel applications at 150 Mb/s and beyond , 1997 .

[7]  I. Mehr,et al.  A CMOS Continuous-Time Filter for PRML Read Channel Applications at 150 Mb/s and Beyond , 1997 .

[8]  J.W.M. Rogers,et al.  A fully integrated multiband MIMO WLAN transceiver RFIC , 2005, IEEE Journal of Solid-State Circuits.

[9]  G. Geelen,et al.  An inherently linear and compact MOST-only current division technique , 1992 .

[10]  Manolis Terrovitis,et al.  An 802.11g WLAN SoC , 2005, ISSCC. 2005 IEEE International Digest of Technical Papers. Solid-State Circuits Conference, 2005..