Iterative refinement methods for time-domain equalizer design
EURASIP Journal on Applied Signal Processing
VLSI Architecture for the Low-Computation Cycle and Power-Efficient Recursive DFT/IDFT Design
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Blind Channel Shortening for Block Transmission of Correlated Signals
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
IEEE Transactions on Signal Processing
Time-domain transmit beamforming for MIMO-OFDM systems with finite rate feedback
IEEE Transactions on Communications
Channel spectral flattening in time domain equalizer design for OFDM systems
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Design of Sparse Filters for Channel Shortening
Journal of Signal Processing Systems
Wireless Personal Communications: An International Journal
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To ease equalization in a multicarrier system, a cyclic prefix (CP) is typically inserted between successive symbols. When the channel order exceeds the CP length, equalization can be accomplished via a time-domain equalizer (TEQ), which is a finite impulse response (FIR) filter. The TEQ is placed in cascade with the channel to produce an effective shortened impulse response. Alternatively, a bank of equalizers can remove the interference tone-by-tone. This paper presents a unified treatment of equalizer designs for multicarrier receivers, with an emphasis on discrete multitone systems. It is shown that almost all equalizer designs share a common mathematical framework based on the maximization of a product of generalized Rayleigh quotients. This framework is used to give an overview of existing designs (including an extensive literature survey), to apply a unified notation, and to present various common strategies to obtain a solution. Moreover, the unification emphasizes the differences between the methods, enabling a comparison of their advantages and disadvantages. In addition, 16 different equalizer structures and design procedures are compared in terms of computational complexity and achievable bit rate using synthetic and measured data.