Algorithmic Exploration and Implementation of a MIMO-OFDM Equalizer
In this paper we explore algorithms and architectures for the implementation of a MIMO OFDM Equalizer for high speed wireless communications. The algorithmic exploration is based on matrix computations and factorizations. A scalable computational methodology and architecture is proposed for the implementation of a 44 MIMO OFDM. A 23 Equalizer supporting Maximum Ratio Combining and Zero Forcing equalization for 20/40MHz 64-QAM OFDM modulation has been implemented in 150nm technology. The Equalizer area is 133k gates and the maximum throughput achieved is 480Mbits/s. The system described in this paper is compliant with the latest IEEE standard for MIMO wireless communications (802.11n)
mimo-ofdm wireless communications zero forcing equalization equalizers for communication systems qr decomposition matrix factorizations givens rotations cordic arithmetic