A 2-Gb/s 5.6-mW digital equalizer for a LOS/NLOS receiver in the 60GHz band

The wide unlicensed bandwidth of a 60GHz channel presents an attractive opportunity for high data rate and low power personal area networks (PANs). The use of single-carrier modulation is beneficial for efficient transmitter and receiver implementation. Equalization of the long channel response in non-line-of-sight (NLOS) conditions presents a significant challenge. A digital equalizer for 60GHz channels has been designed for both line of sight (LOS) and NLOS channel conditions based on the IEEE WPAN standard. Power consumption is minimized by using parallelized distributed arithmetic (DA). A 2mm ×2mm test chip in 65nm CMOS implements a 6-tap feedforward and 32-tap feedback equalizer that consumes 5.6mW at 2.0Gb/s throughput.