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Fixed-point C language for digital signal processing

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2 Author(s)
Wonyong Sung ; Dept. of Control & Instrum. Eng., Seoul Nat. Univ., South Korea ; Jiyang Kang

Fixed-point C language is proposed for convenient and efficient programming of fixed-point digital signal processors. This language has a 'fix' data type that can have an individual integer wordlength according to the range of a variable. It can add or subtract two data having different integer wordlengths by automatically inserting shift operations. The accuracy of the fixed-point multiply operation is significantly increased by storing the upper part of the multiplied double-precision result instead of keeping the lower part as in the integer multiplication. The quantization noise resulting from fixed-point arithmetic is significantly reduced when compared with conventional integer programs. The execution speed is much, nearly 20 times, faster than a floating-point C program in fixed-point digital signal processors.

Published in:

Signals, Systems and Computers, 1995. 1995 Conference Record of the Twenty-Ninth Asilomar Conference on  (Volume:2 )

Date of Conference:

Oct. 30 1995-Nov. 1 1995

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