This Article 
   
 Share 
   
 Bibliographic References 
   
 Add to: 
 
Digg
Furl
Spurl
Blink
Simpy
Google
Del.icio.us
Y!MyWeb
 
 Search 
   
Inner Product Computers
January 1978 (vol. 27 no. 1)
pp. 21-31
E.E., Jr. Swartzlander, TRW Defense and Space Systems Group
The inner product computer is a special-purpose computational unit intended to be used as an adjunct to a general-purpose digital computer to perform numerical processing tasks which previously exceeded the capacity of the general-purpose computer. The algorithmic structure of the inner product is briefly reviewed in the first section of this paper. Methods are described for computing the inner product of complex vectors with a series of four real inner products. Several hardware implementations of the inner product computer are described and then compared in terms of speed and complexity; a figure of merit is developed to simplify the comparison. The utility of this computational unit is demonstrated via the examination of a large-scale numerical problem, computerized three-dimensional x-ray reconstruction (computerized tomography) arising in the biomedical sciences. Finally, a comparison is given of the size of a general-purpose computer required to execute a large-scale processing task with that of an inner product computer to execute the same task. The inner product computer greatly reduces computational costs for the solution of a large class of problems, including computerized tomography, image restoration, weather forecasting, and economic modeling.
Index Terms:
special-purpose processors, Biomedical image computation, computerized axial tomography, digital arithmetic, implementation figure of merit, pipelined processing
Citation:
E.E., Jr. Swartzlander, B.K. Gilbert, I.S. Reed, "Inner Product Computers," IEEE Transactions on Computers, vol. 27, no. 1, pp. 21-31, Jan. 1978, doi:10.1109/TC.1978.1674948
Usage of this product signifies your acceptance of the Terms of Use.