2 research outputs found

    On guaranteed estimation of parameters in autoregressive process with unknown noise variance

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    РассматриваСтся модификация ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°Ρ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΎΡ†Π΅Π½ΠΎΠΊ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡŽΡ‰Π°Ρ ΡƒΠΌΠ΅Π½ΡŒΡˆΠΈΡ‚ΡŒ объСм Π²Ρ‹Π±ΠΎΡ€ΠΊΠΈ, Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎΠΉ для получСния ΠΎΡ†Π΅Π½ΠΎΠΊ с Π·Π°Π΄Π°Π½Π½ΠΎΠΉ срСднСквадратичСской Ρ‚ΠΎΡ‡Π½ΠΎΡΡ‚ΡŒΡŽ. УмСньшСниС объСма Π²Ρ‹Π±ΠΎΡ€ΠΊΠΈ достигаСтся Π·Π° счСт ввСдСния Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ шага для оцСнивания диспСрсии ΡˆΡƒΠΌΠ° процСсса. ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΠΈ ΠΏΡ€ΠΎΡ†Π΅Π΄ΡƒΡ€ оцСнивания Π²Π΅ΠΊΡ‚ΠΎΡ€Π° ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² ΠΈ ΠΏΠΎΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚Π½ΠΎΠ³ΠΎ ΠΎΡ†Π΅Π½ΠΈΠ²Π°-ния. ΠŸΡ€ΠΈΠ²ΠΎΠ΄ΡΡ‚ΡΡ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ числСнного модСлирования

    Novel parameter estimation of autoregressive signals in the presence of noise

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    This paper proposes a new method for estimating the parameters of an autoregressive (AR) signal from observations corrupted by white noise. The feature of the new method is that the observation noise variance estimate is converted into the only solution of a nonlinear equation to yield unbiased estimate of the AR parameters. Moreover, a convergent Newton iterative algorithm with a deterministic initial point is presented for efficient implementation of the proposed new estimation method. As a result, the proposed new method can minimize the error of estimating the variance of the observation noise. Since more accurate estimates of this observation noise variance can be attained at earlier stages, the proposed method can achieve a good performance in estimating the AR signal parameters. Numerical results demonstrate that the proposed new algorithm is more effective in terms of accuracy and robustness against noise than conventional algorithms
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