Matrix Based Computation of Floating-Point Roundoff Noise

Barry D. Van Veen, Richard Baraniuk

Research output: Contribution to journalComment/debatepeer-review

5 Scopus citations


A matrix-based procedure is presented for computing the output roundoff power for filters implemented with floating-point arithmetic. The filter's computational structure is represented in terms of a product of matrices, known as a factored state variable description. The quantities needed to compute the output roundoff noise power are obtained from the factored state variable description by matrix manipulation. The expression for output roundoff noise power is shown to be of the same form as that for fixed-point arithmetic roundoff noise. Comparison indicates that, under very general conditions, fixed-point arithmetic provides better roundoff noise performance than floating-point arithmetic. Several examples are provided.

Original languageEnglish (US)
Pages (from-to)1995-1998
Number of pages4
JournalIEEE Transactions on Acoustics, Speech, and Signal Processing
Issue number12
StatePublished - Dec 1989

ASJC Scopus subject areas

  • Signal Processing


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