Stanley K. Ling

A 5GHz 108Mb/s 2x2 MIMO Transceiver with Fully Integrated +16dBm PAs in 90nm CMOS

A 5GHz 2times2 MIMO transceiver in 90nm CMOS supports spatial multiplexing and diversity, achieving 54/108Mb/s with -75/-63dBm sensitivity for an AWGN/25ns-Rayleigh channel, respectively. Each RX draws 120mA from a 1.4V supply. Each 3.3V 5GHz PA delivers +16/+13dBm average power with -25/-27dB EVM in 1times1/2times2 modes, respectively. The system-in-package including microstrip front-end matching on a flip-chip package occupies a die area of 18mm2

A 5GHz, 108Mb/s 2×2 MIMO CMOS Transceiver

MIMO wireless transceivers employ multiple antennas and advanced digital signal processing to achieve higher data rates and superior link reliability compared to their single-antenna counterparts. This paper presents a 2times2 MlMO 5 GHz WLAN transceiver implemented in 90 nm CMOS. Crosstalk between the different MIMO channels is shown to have a detrimental effect on MIMO performance. Such crosstalk can occur at the radio channel, between the antennas, and at the radio IC. Several architectural and circuit techniques are described that minimize crosstalk between the multiple radio chains co-existing on the same silicon die. Measurements results demonstrate the increased data rate of the fabricated system compared with a conventional single-antenna system