Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2004-05-28
2008-05-27
Mai, Tan V. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07379957
ABSTRACT:
A method of demodulating a square root for processing digital signals is disclosed. The demodulation includes the following steps. First, define |l arg e| to be the larger one between the absolute value of two input values I and Q and define |small| to be the smaller one between the absolute value of the two input values I and Q. Next, define a first determining form by the inequalities 16|small≦16|l arg e|≦18|small| and 16|l arg e|=16|small|. In addition, define a second determining form by the inequalities 16|small|≦16|l arg e|≦18|small| and 16|l arg e|≠|small|. When the relation between |l arg e| and |small| conforms to the first determining form, the approximate root-mean-square value of the two input values I and Q is |l arg e|+2−5|l arg e|. When the relation between |l arg e| and |small| conforms to the second determining form, the approximate root-mean-square value of the two input values I and Q is |l arg e|+2−6|l arg e|.
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Gau Yow-Ling
Meng Ching-Chun
Tien Shi-Ho
Chung Shan Institute of Science and Technology Armaments Bureau,
J.C. Patents
Mai Tan V.
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