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A uniformly distributed hopping pattern suitable for M-levelled M-ary frequency shift keying (MMFSK) and multi-tone MMFSK (M<sup>3</sup>FSK) modulation schemes is proposed. Compared to randomly generated and some purposely designed codes, uniformly distributed codes show better BER performance in a powerline communication (PLC) environment. These codes are(More)
In this paper we present a new method for nonlinear compensation of distortions, e.g. channel effects and additive noise, in clean and telephone speech recognition. A Bidirectional Neural Network (Bidi-NN) was developed and implemented in order to modify distorted input feature vectors and improve the overall recognition accuracy. Distorted components in(More)
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