Abstract
The authors develop an adaptive IIR (infinite-impulse response) algorithm by means of least squares inverses; the algorithm also guarantees the resulting IIR system to be stable. This IIR algorithm consists of two subalgorithms, i.e. the all-pole Q/sub N/(z) and all-zero P/sub N/(z) algorithms. Both are with quadratic performance surfaces and stable. The iterations for Q/sub N/(z) and P/sub N/(z) can be executed simultaneously or alternatively. The all-pole part is independent of P/sub N/(z), but the all-zero part depends on Q/sub N/(z) at each iteration. In many cases, the all-pole model itself is a fairly good approximation of an IIR system. >
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