Approaching Shannon's capacity via geometric shaping has usually been regarded as challenging due to modulation and demodulation complexity, requiring look-up tables store the constellation points bit labeling. To overcome these challenges, in this article, we study lattice-based geometrically shaped formats multidimensional Euclidean space. We describe evaluate fast low complexity algorithms t...

In this paper, the effect of the impulse response of pulse shaping filters on a fractional sampling orthogonal frequency division multiplexing (FS OFDM) system is investigated. FS achieves path diversity with a single antenna through oversampling and subcarrier-based maximal ratio combining (MRC). Though the oversampling increases diversity order, correlation among noise components may deterior...

We demonstrate inhibition of the sidelobes of the axial point spread function in optical coherence tomography by shaping the power spectrum of the light source with a remaining power of 4.54 mW. A broadband amplified spontaneous emission source radiating at 1565 +/- 40 nm is employed in a free-space optical coherence tomography system. The axial point spread functions before and after optical s...

Shaping can be an effective method for improving the learning rate in reinforcement systems. Previously, shaping has been heuristically motivated and implemented. We provide a formal structure with which to interpret the improvement afforded by shaping rewards. Central to our model is the idea of a reward horizon, which focuses exploration on an MDP's critical region, a subset of states with th...

background and aim: the purpose of this study was to evaluate the effect of autoclave sterilization on the fracture rate of protaper instruments (ex vivo). materials and methods: one hundred shaping and finishing protaper instruments were used in a crown – down technique for cleaning and shaping the mesial canals of extracted mandibular molars using 5.25% naocl for irrigation. in the experiment...

in this article wee seek to suggest an analytical model for explaining the israeli foreign policy. to do this, we must, on the one hand, survey briefly the main theories of foreign polcy and, on the other, to review the literature about the israeli foreign policy. the major question this paper would ask is: what are the main factors shaping the israeli foreign policy and which one might be said...

A primary limitation on crane operations is the difficulty of controlling payload oscillations. Given the significance of cranes, it is not surprising that a large amount of research has been dedicated to eliminating crane payload oscillation. Numerous feedbackbased control methods have been proposed. Command-shaping is another method that has received significant attention. This paper compares...

Traffic shaping in high speed networks, including VDSL networks, occurs when congestion builds up in the outgoing VDSL network. Shaping mechanisms want smooth traffic. We used a leaky bucket too achieve traffic shaping. But leaky buckets still have a lot of non-conforming frames. However, as one way to solving this problem, we purpose a double-leaky bucket as the traffic shaping mechanism that ...

Present paper deals with the simulation and implementation of two functional units, parse-to-shaping-frame and differential encoder, for spectral shaping in 56Kbps digital modem transmitter. The idea behind spectral shaping is to adapt the shape of the transmitted signal, to conform to the shape or spectral limitations of the channel, without changing the basic pulse shape or peak-to-average-ra...

The sway motion of crane can be successfully suppressed by properly shaping the reference command. Input shaping is a one type of feed-forward shaping method that is based on linear superposition. In this paper, we present the impact of double pendulum type overhead crane (DPTOC) system on the effectiveness of input shaping. An unshaped bang-bang input force is used to determine the characteris...