Mohd Sharique

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A Lewis acid-catalyzed nucleophilic addition of electron rich aromatics with 3-hydroxy-2-oxindoles 5 was developed. The reaction is believed to proceed through the 2H-indol-2-one ring system 9, which eventually reacts with various electron-rich aromatics to afford a variety of 2-oxindoles with an all-carbon quaternary center at the pseudobenzylic position(More)
We first provide the motivation for a new family of time-limited Nyquist pulses for OFDM systems by multiplying existing Nyquist pulses in the frequency domain. The condition required for the resultant pulses to have a roll-off factor less than or equal to unity is then established. The roll-off factor is found to be a function of two design parameters.(More)
The goal of waveform shaping techniques in orthogonal frequency division multiplexing systems is reduction in out of band (OOB) transmit power as well as reduction in inter-carrier interference (ICI) generated by carrier frequency offset at the receiver. We propose waveform shaping using a linear combination of time-limited polynomial pulses having spectral(More)
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