Understanding digital subscriber line technology
Understanding digital subscriber line technology
Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
Statistical Digital Signal Processing and Modeling
Statistical Digital Signal Processing and Modeling
Equalization for discrete multitone transceivers to maximize bitrate
IEEE Transactions on Signal Processing
Orthogonal transmultiplexers in communication: a review
IEEE Transactions on Signal Processing
Infinite length results and design implications for time-domain equalizers
IEEE Transactions on Signal Processing
IEEE Transactions on Information Theory
DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
Room impulse response shortening/reshaping with infinity- and p-norm optimization
IEEE Transactions on Audio, Speech, and Language Processing
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Time-domain equalization is crucial in reducing channel state dimension in maximum likelihood sequence estimation and inter-carrier and intersymbol interference in multicarrier systems. A time-domain equalizer (TEQ) placed in cascade with the channel produces an effective impulse response that is shorter than the channel impulse response. This paper analyzes two TEQ design methods amenable to cost-effective real-time implementation: minimum mean square error (MMSE) and maximum shortening SNR (MSSNR) methods. We reduce the complexity of computing the matrices in the MSSNR and MMSE designs by a factor of 140 and a factor of 16 (respectively) relative to existing approaches, without degrading performance. We prove that an infinite-length MSSNR TEQ with unit norm TEQ constraint is symmetric. A symmetric TEQ halves FIR implementation complexity, enables parallel training of the frequency-domain equalizer and TEQ, reduces TEQ training complexity by a factor of 4, and doubles the length of the TEQ that can be designed using fixed-point arithmetic, with only a small loss in bit rate. Simulations are presented for designs with a symmetric TEQ or target impulse response.