Nader Sheikholeslami Alagha

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Data transmission over bandlimited channels requires pulse shaping to eliminate or control intersymbol interference (ISI). Nyquist filters provide ISI-free transmission. Here we introduce a phase compensation technique to design Nyquist filters. Phase compensation can be applied to the square-root of any zero-phase bandlimited Nyquist filter with normalized(More)
An ASIC implementation of analogue receiver focused on telecommand applications for Category A missions (Return-to-Earth, lunar and even Lagrangian missions) is presented. In addition to embedded Low-Density Parity Check (LDPC) 128 bit analogue decoder, the ASIC integrates IF coherent demodulation, carrier tracking, clock recovery, SP-L to NRZ codify data(More)
A non-maximally decimated filterbank structure for preequalizing channels with Inter-Symbol Interference (ISI) is investigated. The impulse response of the channel is assumed to be known at the transmitter. Compared with the classical Tomlinson-Harashima Precoding technique, the proposed pre-equalizer compensates for the channel without increasing the(More)
For the past few decades, analog voiceband modems have been used extensively to carry digital information over the Public Switched Telephone Network (PSTN). Conventional voiceband modems treat the PSTN as an analog communication channel. However, today’s PSTN is mostly a digital network except for the basic telephone services provided via analog subscriber(More)
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