Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. This scheme uses a number of sub-carriers and converts a frequency selective fading channel to a set of parallel flat fading channels. The OFDM signal is having a drawback that some signal values can be much higher than the average value. This results in high Squared Crest Fac...

We determine the relationship between the depolarization properties of inhomogeneous particles and the statistical parameters of their internal refractive-index distributions. Our analysis demonstrates that the linear depolarization ratio of backscattered light by an inhomogeneous particle is approximately proportional to both the squared standard deviation and the squared correlation length of...

Implantable devices capable of several modes of therapy will require differentiation of various ventricular tachyarrhythmias. Three methods of arrhythmia analysis, magnitude-squared coherence, ventricular rate, and irregularity of cycle length were performed for 45 episodes of induced ventricular tachyarrhythmia in 15 patients. Differentiation of monomorphic ventricular tachycardia from polymor...

We report on block-coding techniques for partial-response II. PRELIMINARY channels with transfer function (1 F Dm), m = 1,2, . . We consider various constructions of block codes with prescribed min imum Euclidean Let u = (x1,... ,un) andv = (VI,..., un) be two n-tuples over distance. Upper and lower bounds to the size of a code with min imum @ = {-l,l}. Define the difference vector e = (el,...,...

We analyze a blind channel impulse response identification scheme based on the cross correlation of blind symbol estimates with the received signal. The symbol estimates specified are those minimizing the Godard (or constant modulus) criterion, for which mean-squared symbol estimation error bounds have recently been derived. In this paper, we derive upper bounds for the average squared paramete...

Most measurements of ocean surface wave variations are made in the temporal domain, i.e wave height or slope as a function of time. By contrast, a synthetic aperture radar (SAR) is capable of measuring waves in the twodimensional spatial domain at essentially a single instant. As a consequence, SAR imagery affords us a unique opportunity to examine some of the non-linear features of ocean surfa...

This paper is concerned with off-line and on-line coverage of planar environments by an autonomous mobile robot of size D, under the constraint of a limited energy source such as a battery. Starting at S, the robot has to cover a planar environment containing obstacles, and return to S upon task completion. The robot may return to S at any time to recharge its battery. In the off-line case the ...

with the increasing installed capacity of desalination, the greenhouse gas emission for generating the required energy to power the desalination plants is also becoming the focus of attention in the world community. domestic reverse osmosis membranes have been very successful technology especially in the developing world to provide safe drinking water. the novel concept of photovoltaic powered ...

Recently, there has been a growing research interest in the analysis of dynamic regret, which measures the performance of an online learner against a sequence of local minimizers. By exploiting the strong convexity, previous studies have shown that the dynamic regret can be upper bounded by the path-length of the comparator sequence. In this paper, we illustrate that the dynamic regret can be f...