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A super broadband OFDM-radio-over-fibre system with a record bandwidth of 16 Gbit/s to transmit over both 20 km SMF-28 and wireless distance of over 6 m has been experimentally demonstrated. [ABSTRACT FROM AUTHOR]

A new scheme, based on Bragg gratings written in highly birefringent fibre that allows both increasing the channel density and relaxing the filter bandwidth requirements in future radio-over-fibre wavelength interleaved distribution networks, is presented and tested. [ABSTRACT FROM AUTHOR]

A novel design of an ultrafast temporal differentiator based on a π phase-shifted long-period fibre grating is proposed and numerically tested. This design can process optical signals with terahertz bandwidths and it is especially advantageous in terms of stability and robustness against variations in the grating parameters. [ABSTRACT FROM AUTHOR]

A new wideband flower-shaped microstrip antenna patch, semicircle-fed, is investigated. The broadband characteristic is achieved by introducing flower petals at the four sides of a rectangular patch. The proposed antenna is able to achieve an impedance bandwidth of 63% for VSWR less than 2. Using the same excitation mechanism, a comparison between the proposed antenna, a similar-size rectangular-shaped patch antenna and a diamond-shaped patch antenna is given. [ABSTRACT FROM AUTHOR]

This article discusses modified two-dimensional root cepstrum analysis. Most current speech recognition techniques involve, in their primary stage, a one-dimensional cepstrum to represent the speech signal. Mel-frequency cepstral coefficients (MFCCs) are commonly used in many speech recognition systems. TheMFCCs are based on the known variation of the human ear's critical bandwidths with frequency. The experimental results, using data from the TIMIT database, show that the MTDRC has much better performance than the original TDRC when applied to isolated word speech recognition.