Nonlinearity Requirements For Correlation Based Associative Memories

R J Marks II; L E Atlas; J J Choi; S Oh; K F Cheung; D C Park

doi:10.1117/12.944080

3 May 1988 Nonlinearity Requirements For Correlation Based Associative Memories

R J Marks II, L E Atlas, J J Choi, S Oh, K F Cheung, D C Park

Proceedings Volume 0881, Optical Computing and Nonlinear Materials; (1988) https://doi.org/10.1117/12.944080
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

A matched filter based architecture for associative memories ( MB'AM ) has been proposed by many researchers[1-12]. The correlation from a leg of a matched filter bank, after being altered nonlinearly, weights its corresponding library vector. The weighted vectors are summed and clipped to give an estimate of the library vector closest to the input. We analyze the performance of such architectures for binary and/or bipolar inputs and libraries. Sufficient conditions are derived for the correlation nonlinearity so that the MFAM outputs the correct result. If, for example, N bipolar library vectors are stored, then the correlation nonlinearity Z(x) = Nx/2, will always result in that library vector closest to the input in the Hamming sense.

Citation Download Citation

R J Marks II, L E Atlas, J J Choi, S Oh, K F Cheung, and D C Park "Nonlinearity Requirements For Correlation Based Associative Memories", Proc. SPIE 0881, Optical Computing and Nonlinear Materials, (3 May 1988); https://doi.org/10.1117/12.944080

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