In the square-root Nyquist transmit-filtered single-carrier (SC) transmission, increasing the roll-off factor can reduce the peak-to-average power ratio (PAPR) of the transmit signal. Furthermore, since the signal bandwidth becomes wider, larger frequency diversity gain can be achieved. In our previous work, we proposed joint minimum mean square error frequency-domain equalization (MMSE-FDE) & ...

A new family of Nyquist pulses for coherent optical single carrier systems is introduced and is shown to increase the nonlinearity tolerance of dual-polarization (DP)-QPSK and DP-16-QAM systems. Numerical investigations for a single-channel 28 Gbaud DP-16-QAM long-haul system without optical dispersion compensation indicate that the proposed pulse can increase the reach distance by 26% and 19%,...

The paper is based upon the performance of various w indows in designing FIR Filter. The cosine hyperbolic w indow has been used to design a better FIR Filter in terms of ripple ratio, side-lobe roll off ratio and main-lobe w idth w ith its advantages of no power series expansion in frequency domain hence need less hardware. The spectral characteristic of cosh window is compared with other wind...

Roll stabilization (damping) is an important problem of ship motion control since excessive roll motion may cause motion sickness of human occupants and damage fragile cargo. This problem becomes especially non-trivial in situations where the same actuators are used for the vessel’s roll and yaw stabilization. To keep the “trade-off” between the concurrent goals of accurate course steering and ...

Root raised cosine roll-off (RRC) filter is one of the most fundamental elements in modern digital communications. This paper proposes a new method to efficiently realize the RRC filter. The method employs cubic Hermite interpolation to obtain a piecewise-polynomial approximation for the impulse response of the RRC filter. Then, the approximated impulse response is efficiently realized by using...

Abstract: The formula of the Generalized Ambiguity Function (GAF) of passive bistatic SAR 11 system using the non-cooperative illuminators which transmit PSK modulating signals is derived 12 to analyze the spatial resolution of the system. The average GAF is introduced to remove the effect 13 of particular sequence of symbols on resolution because the particular sequence of symbols is 14 usuall...

This review article summarizes the results of space research on eye movements and subjective perception during vestibular stimulation. Inflight and postflight changes in reflex eye movements gain are described for head angular rotation (yaw, pitch, and roll), linear acceleration, off-vertical axis rotation, and optokinetic stimulation. There is evidence that changes in eye movements in microgra...

Electrically driven organic lasers are among the best lasing devices due to their rich variety of emission colors as well as other advantages, including printability, flexibility, and stretchability. However, electrically driven lasing in organic materials has not yet been demonstrated because of serious luminescent efficiency roll-off under high current density. Recently, we found that the org...

The most important part of a Digital Signal Processing or DSP is a filter which passes the desired frequency components and rejects the unwanted signals as noise. So Digital filter play an important role in DSP based communication system. Digital filter has many advantages over the analog filter. FIR filter gives linear and stable performance as compare to IIR filter. In this paper Band reject ...

We have examined the spatiotemporal characteristics of postrotatory eye velocity after roll and pitch off-vertical axis rotations (OVAR). Three rhesus monkeys were placed in one of 3 orientations on a 3-dimensional (3D) turntable: upright (90 degrees roll or pitch OVAR), 45 degrees nose-up (45 degrees roll OVAR), and 45 degrees left ear-down (45 degrees pitch OVAR). Subjects were then rotated a...