TY - JOUR
T1 - A stabilized multichannel fast RLS algorithm for adaptive transmultiplexer receivers
AU - Chang, Dah Chung
AU - Chiu, Hsien Cheng
PY - 2009/12
Y1 - 2009/12
N2 - The transmultiplexer (TMUX) system has been studied for its application to multicarrier communications. The channel impairments including noise, interference, and distortion draw the need for adaptive reconstruction at the TMUX receiver. Among possible adaptive methods, the recursive least squares (RLS) algorithm is appealing for its good convergence rate and steady state performance. However, higher computational complexity due to the matrix operation is the drawback of utilizing RLS. A fast RLS algorithm used for adaptive signal reconstruction in the TMUX system is developed in this paper. By using the polyphase decomposition method, the adaptive receiver in the TMUX system can be formulated as a multichannel filtering problem, and the fast algorithm is obtained through the block Toeplitz matrix structure of received signals. In addition to the reduction of complexity, simulation results show that the adaptive TMUX receiver has a convergence rate close to that of the standard RLS algorithm and the performance approaches the minimum mean square error solution.
AB - The transmultiplexer (TMUX) system has been studied for its application to multicarrier communications. The channel impairments including noise, interference, and distortion draw the need for adaptive reconstruction at the TMUX receiver. Among possible adaptive methods, the recursive least squares (RLS) algorithm is appealing for its good convergence rate and steady state performance. However, higher computational complexity due to the matrix operation is the drawback of utilizing RLS. A fast RLS algorithm used for adaptive signal reconstruction in the TMUX system is developed in this paper. By using the polyphase decomposition method, the adaptive receiver in the TMUX system can be formulated as a multichannel filtering problem, and the fast algorithm is obtained through the block Toeplitz matrix structure of received signals. In addition to the reduction of complexity, simulation results show that the adaptive TMUX receiver has a convergence rate close to that of the standard RLS algorithm and the performance approaches the minimum mean square error solution.
KW - Adaptive signal processing
KW - Fast recursive least squares (FRLS)
KW - Minimum mean square error
KW - Multicarrier communications
KW - Polyphase decomposition
KW - Toeplitz matrix
KW - Transmultiplexer
UR - http://www.scopus.com/inward/record.url?scp=72849143517&partnerID=8YFLogxK
U2 - 10.1007/s00034-009-9131-6
DO - 10.1007/s00034-009-9131-6
M3 - 期刊論文
AN - SCOPUS:72849143517
SN - 0278-081X
VL - 28
SP - 845
EP - 867
JO - Circuits, Systems, and Signal Processing
JF - Circuits, Systems, and Signal Processing
IS - 6
ER -