Noise Performance of Linear Associative Memories

Kalavai J. Raghunath, Vladimir Cherkassky

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The performance of two commonly used linear models of associative memories, generalized inverse (G1) and correlation matrix memory (CMM) is studied analytically in the presence of a new type of noise (training noise due to noisy training patterns). Theoretical expressions are determined for the SNR (signal-to-noise ratio) gain of the GI and CMM memories in the auto-associative and hetero-associative modes of operation. It is found that the GI method performance degrades significantly in the presence of training noise while the CMM method is relatively unaffected by it. The theoretical expressions are plotted and compared with the results obtained from Monte Carlo simulations and the two are found to be in excellent agreement.

Original languageEnglish (US)
Pages (from-to)757-765
Number of pages9
JournalIEEE Transactions on Pattern Analysis and Machine Intelligence
Issue number7
StatePublished - Jul 1994


  • Associative memory
  • correlation memory matrix
  • generalized inverse
  • noise performance


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