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There are two major factors restricting current loop bandwidth, switching frequency and digital delay. Digital delay includes A/D sampling time and PWM duty cycle update. The calculating delay is the major source of delay in the loop. The bandwidth expansion strategy was proposed. Double stator current sampling and double PWM duty cycle update were achieved in a carrier period. This paper chooses...
This paper presents an ultra-wideband (UWB) bandpass filter for UWB applications and notch filter for the purpose of reducing interference from the WLAN (802.11a) when it coexist with UWB radio system. The bandpass filter consists of a hexagonal shaped multiple mode resonator (MMR) with interdigital coupling at both sides. The notch filter consists of four identical open ended stubs nearby the MMR...
Traditional congestion control algorithms exhibit low convergence speed to equilibrium in high BDP (Bandwidth Delay Product) networks. The Fast Max-Min Kelly Control (FMKC) is a new and promising protocol that performs well especially in fairness convergence speed. FMKC utilizes packet loss to switch temporarily into a fairing mode and thereby improve the fairness convergence speed. In this paper,...
It has been widely recognized that the multipath routing can be fundamentally more efficient than the traditional approach of routing along single path. A self-adaptive traffic splitting algorithm, called Dynamic Weighted Round-Robin (DWRR), has been developed to distribute traffic fairly in term of the weight so as to obtain good performance of network load balance. In addition, DWRR can get lower...
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