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The first demonstration of an integrated circuit using high mobility p-channel modulation doped field effect transistors (MODFETs) is reported. A static frequency divider was fabricated on Si[sup 0.7]Ge[sub 0.3]/Si[sub 0.2]Ge[sub 0.8]/Si[sub 0.7]Ge[sub 0.3] strained heterostructures grown epitaxially on Si using ultra-high vacuum chemical vapour deposition; divide-by-two operation was achieved for clock frequencies of up to 2.9 GHz. [ABSTRACT FROM AUTHOR]

A new energy-matching approach for blind equalisation of possibly non-minimum phase channels is presented. The scheme exploits second order statistics and uses oversampling, but does not use the matching of statistics of the input with that of the output symbols. All the source symbols must have equal energy. A finite impulse response filter is used as an equaliser, whose weights are updated by using the energy constraint imposed on the output symbols. The proposed scheme is computationally light and converges in one epoch only. [ABSTRACT FROM AUTHOR]

A fully-multiplicative, batch learning algorithm for neural independent component analysis (ICA) on the orthogonal group O(N) is presented. It exploits the known principle of diagonalisation of a tensor of a warped network's outputs, which is achieved through fast iteration. [ABSTRACT FROM AUTHOR]