TY - JOUR
T1 - Sequence estimation and channel equalization using forward decoding kernel machines
AU - Chakrabartty, Shantanu
AU - Cauwenberghs, Gert
PY - 2002
Y1 - 2002
N2 - A forward decoding approach to kernel machine learning is presented. The method combines concepts from Markovian dynamics, large margin classifiers and reproducing kernels for robust sequence detection by learning inter-data dependencies. A MAP (maximum a posteriori) sequence estimator is obtained by regressing transition probabilities between symbols as a function of received data. The training procedure involves maximizing a lower bound of a regularized cross-entropy on the posterior probabilities, which simplifies into direct estimation of transition probabilities using kernel logistic regression. Applied to channel equalization, forward decoding kernel machines outperform support vector machines and other techniques by about 5dB in SNR for given BER, within 1dB of theoretical limits.
AB - A forward decoding approach to kernel machine learning is presented. The method combines concepts from Markovian dynamics, large margin classifiers and reproducing kernels for robust sequence detection by learning inter-data dependencies. A MAP (maximum a posteriori) sequence estimator is obtained by regressing transition probabilities between symbols as a function of received data. The training procedure involves maximizing a lower bound of a regularized cross-entropy on the posterior probabilities, which simplifies into direct estimation of transition probabilities using kernel logistic regression. Applied to channel equalization, forward decoding kernel machines outperform support vector machines and other techniques by about 5dB in SNR for given BER, within 1dB of theoretical limits.
UR - http://www.scopus.com/inward/record.url?scp=0036297358&partnerID=8YFLogxK
U2 - 10.1109/icassp.2002.5745197
DO - 10.1109/icassp.2002.5745197
M3 - Conference article
AN - SCOPUS:0036297358
SN - 1520-6149
VL - 3
SP - III/2669-III/2672
JO - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
JF - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
T2 - 2002 IEEE International Conference on Acoustic, Speech, and Signal Processing
Y2 - 13 May 2002 through 17 May 2002
ER -