Time-recursive lattice structure for IFFT in DMT application

Details Time-recursive lattice structure for IFFT in DMT application Time-recursive lattice structure for IFFT in DMT application

2006-01-10

2006-01-10

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

06985919

ABSTRACT:
The present invention may significantly reduce the number of iteration of the time recursive IFFT structure. First, the real and imaginary part of the input signal are modified based on the symmetric and anti-symmetric. Then, they are mixed together by an adder and fed into the lattice module. Next, an IFFT is performed on the modified input data sequence to generate a transformed sequence. Through the symmetric and anti-symmetric properties, the redundant terms may be eliminated.

REFERENCES:
patent: 5633817 (1997-05-01), Verhenne et al.
patent: 6157938 (2000-12-01), Wu et al.
patent: 2003/0212722 (2003-11-01), Jain et al.
patent: 2004/0162866 (2004-08-01), Malvar
“An Improved Time-Recursive Lattice Structure for Low-Latency IFFT Architecture in DMT Transmitter” by Chi-Li Yu, Dept. of Electrical Engineering , National Central University, Taiwan and An-Yeu Wu, Dept. of Electrical Engineering, National Taiwan University, Taiwan, pp. IV-250-253.

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