Channel state feedback plays an important role to the improvement of link performance in current wireless communication systems, and even more in the next generation. The feedback information, however, consumes the uplink bandwidth and thus generates overhead. In this paper, we investigate the impact of channel state feedback and propose an improved scheme to reduce the overhead in practical co...

the research was aimed at finding out the effects of the implementation of writing feedback techniques and students’ writing anxiety on students’ writing ablity. experimental method of 3x2 factorial design was employed in the research. there were three experimental groups of students who were taught by using teacher feedback, peer feedback and the combination of peer and teacher feedback writin...

This paper presents a new scalable buffer-management scheme for IP Differentiated Services. The scheme consists of a Differentiated Random Drop (DRD) algorithm using feedback from a virtual scheduler. DRD choses a queue to perform an early packet drop to avoid congestion according to a specific probability function. First it will be shown that DRD in conjunction with first-come firstserved sche...

A modified frequency compensation technique is proposed for low-power area-efficient three-stage amplifiers driving medium to large capacitive loads. Coined hybrid cascode feedforward compensation (HCFC), the total compensation capacitor is divided and shared between two internal high-speed feedback loops instead of only one loop as is common in prior art. Detailed analysis of this technique sh...

ATELLITE networks will have a crucial role for global s multicast services due to their large coverage area, abundant bandwidth particularly at higher frequency, and rapid network setup. As in terrestrial reliable multicasting cases, however, feedback implosion 141, [6], [9] is identified as a major problem in satellite multicast. The feedback implosion occurs when a large number of receivers s...

In this paper, we propose a novel adaptive modulation and coding (AMC) algorithm dedicated to reduce the feedback frequency of the channel state information (CSI). There have been already plenty of works on AMC so as to exploit the bandwidth more efficiently with the CSI feedback to the transmitter. However, in some occasions, frequent CSI feedback is not favorable in these systems. This work c...

Positive joint torque feedback (JTF) can compensate the detrimental effects of load torques on position tracking performance. However, with (real world) nonideal torque sources, simple unity gain positive torque feedback can actually deteriorate the performance, or even result in instability. In this work, a new joint torque feedback approach is proposed which takes into account the actuator’s ...

This paper discusses some issues and possibilities for more eeective ABR (Available Bit Rate) traac management which arise from a careful consideration of various time scales present in an ATM networking environment. Since the ABR applications will typically use the remaining resources after CBR (Constant Bit Rate) and VBR (Variable Bit Rate) applications have been accommodated, the ABR rate sh...

19 The goal of this study was to investigate the human ability to stabilize the trunk in space during pelvic 20 tilt. Upper body sway was evoked in kneeling-seated healthy subjects by angular platform perturbations with a 21 rotation around a virtual low-back pivot point between the L4 and L5 vertebrae. To investigate motor control 22 modulation, variations in task instruction (balance naturall...

We experimentally study a semiconductor laser subject to two optical feedbacks in free space setup. show that control over the feedback phase is essential adjust time delay signature chaotic output intensity while affecting also bandwidth. By optimizing phase, can be reduced by factor of more than 2 maintaining large