US 6,982,662 B2 | ||
Method and apparatus for efficient conversion of signals using look-up table | ||
Jaehoon Heo, Sugar Land, Tex. (US) | ||
Assigned to Texas Instruments Incorporated, Dallas, Tex. (US) | ||
Filed on Mar. 08, 2004, as Appl. No. 10/795,914. | ||
Claims priority of provisional application 60/452397, filed on Mar. 06, 2003. | ||
Prior Publication US 2004/0174279 A1, Sep. 09, 2004 | ||
Int. Cl. H03M 7/00 (2006.01) |
U.S. Cl. 341—106 | 23 Claims |
1. A method for conversion of signals, comprising:
receiving a first plurality of bits from a signal;
performing a look-up in a table with a first subset of bits in the first plurality of bits to generate a result;
adding the result to generate a sum;
performing another look-up in the table with a second subset of bits in the first plurality of bits and adding the result
to the sum until a look-up with a last subset of bits in the first plurality of bits is performed and the result added to
the sum, wherein the table is a two dimensional array containing a plurality of elements, the size of the first dimension
equal a number of bits in the plurality of bits divided by a number of bits in the subset of the plurality of bits, the size
of the second dimension equal to 2(numbers of bits in subset);
outputting the sum as a first multiple bit value; and
receiving a second plurality of bits from the signal and converting to a second multiple bit value using the steps described
above until all bits in the signal have been converted, wherein each plurality of bits has the same number of bits and each
subset of bits in the plurality of bits has the same number of bits.
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