Current cochlear prostheses use amplitude-modulated pulse trains to encode acoustic signals. In this study we examined the responses of inferior colliculus (IC) neurons to sinusoidal amplitude-modulated pulses and compared the maximum unmodulated pulse rate (Fmax) to which they responded with the maximum modulation frequency (maxFm) that they followed. Consistent with previous results, response...

In this paper, a very low power and low complexity all digital impulse radio ultra wideband (IR-UWB) transmitter is presented. The pulse repeating frequency (PRF) of the transmitted signal is controlled digitally, which complies with federal commission committee (FCC) regulations. In order to control the transmitted power the amplitude of transmitted signals is reduced by increasing the PRF. Th...

Most of the experiments planned for LCLS will require accurate measurements of xray pulse temporal history, including pulse shape and relative timing with optical lasers. These requirements are particularly daunting given the recent demands for shorter pulse-widths (< 50 fs), some of which are discussed at the LCLS workshop[1]. This LOI addresses a novel approach to these measurements. There ar...

Temporal modulations in stimulus amplitude are essential for recognizing and categorizing behaviorally relevant acoustic signals such as speech. Despite this behavioral importance, it remains unclear how amplitude modulations (AMs) are represented in the responses of neurons at higher levels of the auditory system. Studies utilizing stimuli with sinusoidal amplitude modulations (SAMs) have demo...

We introduce a novel photonic-assisted ultrabroadband radio-frequency arbitrary waveform generation setup capable of high-speed phase and amplitude modulation of the individual arbitrary waveforms. The waveform generator is based on an optical interferometer, within which a high-resolution optical pulse shaper and integrated optic phase and intensity modulators are placed, followed by frequency...

This paper studies the performance degradation of ultra wideband (UWB) radio system in intentionally interfered AWGN channel. Simulated UWB systems utilize pulse shape (PSM), pulse position (PPM) and pulse amplitude (PAM) data modulation schemes. All the modulation schemes are binary. The pulse waveforms used in the study are based on a Gaussian pulse, being its first four derivatives. Interfer...

The goal of the study was to compare pulse responses with sinusoidal temporal responsivity. The response of macaque ganglion cells was measured to brief luminance and chromatic pulses and to luminance or chromatic sinusoidal modulation. To make both positive and negative lobes of the pulse response visible, responses to pulses of opposite polarity were combined to yield a linearized pulse respo...

In this paper, the performance of various Pulse Position Modulation (PPM) schemes has been analysed for PIN and APD receivers in the presence of atmospheric turbulence. It is observed that the performance of the APD receiver is always better than that of the PIN receiver as expected. Among the various modulation schemes, the performance of Differential Amplitude PPM (DAPPM) scheme with more num...