Constraints in channel shortening equalizer design for DMT-based systems
Signal Processing
Bitrate maximizing per group equalization for DMT-based systems
Signal Processing - Fractional calculus applications in signals and systems
Efficient channel shortening equalizer design
EURASIP Journal on Applied Signal Processing
Turbo-per-tone equalization for ADSL systems
EURASIP Journal on Applied Signal Processing
Iterative refinement methods for time-domain equalizer design
EURASIP Journal on Applied Signal Processing
EURASIP Journal on Applied Signal Processing
Journal of Signal Processing Systems
A Method for Filter Shaping in Convolutive Blind Source Separation
ICA '09 Proceedings of the 8th International Conference on Independent Component Analysis and Signal Separation
IEEE Transactions on Signal Processing
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
A convex optimization approach to blind channel shortening in multicarrier modulations
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Joint channel and echo impulse response shortening for high-speed data transmission
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Space-time equalization for asynchronous multiuser bit-interleaved coded OFDM
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A convex optimization approach to blind channel shortening in multicarrier modulations
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Channel spectral flattening in time domain equalizer design for OFDM systems
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Time-domain equalizer for multicarrier systems in impulsive noise
International Journal of Communication Systems
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In a discrete multitone receiver, a time-domain equalizer (TEQ) reduces the intersymbol interference (ISI) by shortening the effective duration of the channel impulse response. Current TEQ design methods such as the minimum mean-squared error (MMSE), maximum shortening SNR (MSSNR), and maximum geometric SNR (MGSNR) do not directly maximize bit rate. We develop two TEQ design methods to maximize the bit rate. First, we partition an equalized multicarrier channel into its equivalent signal, noise, and ISI paths to develop a new subchannel SNR definition. Then, we derive a nonlinear function of TEQ taps that measures the bit rate, which the proposed maximum bit rate (MBR) method optimizes. We also propose a minimum-ISI method that generalizes the MSSNR method by weighting the ISI in the frequency domain to obtain higher performance. The minimum-ISI method is amenable to real-time implementation on a fixed-point digital signal processor. Based on simulations using eight different carrier-serving-area loop channels, (1) the proposed methods yield higher bit rates than MMSE, MGSNR, and MSSNR methods; (2) the proposed methods give three-tap TEQs with higher bit rates than 17-tap MMSE, MGSNR, and MSSNR TEQs; (3) the proposed MBR method achieves the channel capacity (as computed by the matched filter bound using the proposed subchannel SNR model) with a five-tap TEQ; and (4) the proposed minimum-ISI method achieves the bit rate of the optimal MBR method