DocumentCode :
1849677
Title :
Polarization-encoded optical shadow-casting: an efficient implementation of carry-free arithmetic
Author :
Cherri, A.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan Univ., Dearborn, MI
fYear :
1993
fDate :
24-28 May 1993
Firstpage :
1155
Abstract :
The carry-free addition and borrow-free subtraction on the redundant binary number is adopted for the lensless polarization-encoded optical shadow-casting (POSC). First, a new recoding truth-table which has a symmetrical complemented relationship between the input minterms (entries that produce an output of 1 or -1) and their corresponding output bits is developed for the redundant signed-digit numbers. Then, the carry-free POSC adder/subtracter is designed by determining the encodings of the redundant bits for generating the sum/difference output bit and the source LEDs pattern. Two design methods are presented: direct implementation and truth-table partitioning. It is shown that the design of the POSC carry-free adder/subtracter has much less pixel subcell (six) in the coding pattern of the POSC system than the previously designed carry-free adder (twelve)
Keywords :
adders; digital arithmetic; encoding; logic design; optical information processing; redundancy; POSC adder/subtracter; borrow-free subtraction; coding pattern; encodings; polarization-encoded optical shadow-casting; redundant binary number; redundant signed-digit numbers; sum/difference output bit; truth-table partitioning; Adders; Application software; Arithmetic; Design methodology; Encoding; High speed optical techniques; Light emitting diodes; Optical computing; Optical polarization; Optical propagation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Aerospace and Electronics Conference, 1993. NAECON 1993., Proceedings of the IEEE 1993 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-1295-3
Type :
conf
DOI :
10.1109/NAECON.1993.290780
Filename :
290780
Link To Document :
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