LSI development of 8×8 single-user MIMO-OFDM for IEEE 802.11ac WLANs

Multiple-input multiple-output orthogonal frequency multiplexing (MIMO-OFDM) is powerful in enhancing communication capacity or reliance. The IEEE802.11n standard defines use of four spatial streams in spatial division multiplexing (SDM). The task group of IEEE802.11ac will extend it to eight spatial streams. This paper reports LSI development of an 8×8 MIMO-OFDM baseband transceiver compatible with the IEEE802.11ac specification. Two types of 8×8 MMSE MIMO detectors based on Strassen's matrix inversion have been presented. The transceiver designed on 90-nm CMOS technology has 13.3 millions in logic gates and consumes 1.4 W in the maximum power dissipation.