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In many speech separation, enhancement, and recognition techniques, it is necessary to express the log spectrum of a mixture speech signal in terms of the log spectra of the underlying speech signals. For this purpose, the mixture-maximisation (MIXMAX) approximation is commonly used. Presented is a proof for this approximation in a statistical framework. It is concluded that this approximation is...
The interweaving of adjacent convoluted elements of crossed dipoles is shown to give reductions in operating frequencies of almost 15 times for single layer surfaces. The frequency stability with oblique incidence is observed to be significantly better than for simple crossed dipoles. At normal incidence the fractional reflection bandwidth increases to more than 60% and the common bandwidth for oblique...
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