Method for transforming data by look-up table

Details Method for transforming data by look-up table Method for transforming data by look-up table

2005-11-02

2010-11-09

Mai, Tan V (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07831649

ABSTRACT:
Provided is a method for transforming data using a look-up table. The method includes the steps of: (a) mapping pre-processed input binary data to a constellation diagram divided into four quadrants to output a first complex number; (b) performing addition/subtraction operations between real numbers and between imaginary numbers with respect to the first complex number and a second complex number; and (c) reading a fourth complex from a look-up table in response to the first complex number, the second complex number and a third complex number, the look-up table outputting the fourth complex by performing a subtraction operation on multiplication results between real numbers and between imaginary numbers and an addition operation on multiplication results between the real numbers and the imaginary numbers with respect to the result value of the step (b) and the third complex number. Accordingly, it is possible to reduce the hardware size at the time of IFFT/FFT design and to provide a high-speed, low-power operation.

REFERENCES:
patent: 2008/0172436 (2008-07-01), Amer
patent: 1999-0081320 (1999-11-01), None
patent: 2001-0064866 (2001-07-01), None

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