Block-Based Transceivers for Wireless Networks Paulo Diniz - UFRJ, Brazil Abstract The standard designs of multicarrier and single-carrier transceivers employing frequency-domain equalization require, at least, L elements of redundancy, where L stands for the channel order. The redundancy eliminates the inherent interblock interference (IBI), which is part of all block-based transceivers, and turns the channel matrix circulant. The spectral decomposition of the circulant channel matrix through the discrete Fourier transform (DFT) allows the use of superfast algorithms for both the design of zero-forcing (ZF) and minimum mean squared error equalizers, and the equalization of received signals. However, it is well known that the minimum redundancy for IBI-free designs of fixed and memoryless transceivers is the truncated value of L/2. So far, there are no effective and practical solutions using minimum redundancy. This presentation proposes practical ZF and MMSE solutions by using DFT, discrete Hartley transform (DHT), and diagonal matrices. In particular, it is shown that, for some particular mild constraints on the channel model, the new designs have similar bit error rate performance as compared with the standard ones, while keeping the same asymptotic complexity for the equalization process, O (n log n). The key feature of the proposed transceivers is the higher throughput which will be fundamental to use wireless channels more effectively.