This paper investigates the impact of chip duty factor (DF) in DS-UWB system with Rake receiver over AWGN and UWB indoor multipath environment corresponding to system parameters such as spreading bandwidth and chip length. Manipulating DF in DS-UWB system offers several advantages over multipath channel and thus, capable of improving system performance for better quality of communication. Altho...

In this paper, an adaptive co-channel interference suppression technique for multi-user MIMO MC DS/CDMA system is envisaged. MC DS/CDMA offers many advantages like flexibility, robustness, low PAPR and spectral efficiency. In spite of these advantages, performance of MC DS/CDMA system is greatly impaired by interference. Common interferences, which degrade the performance of the system, are MAI...

The conventional Direct sequence DS, and the frequency hopping FH are the common spread spectrum methodologies. The new trend in the spread spectrum communication systems is to use the combined hybrid techniques. The use of a hybrid systems attempt to capitalize upon the advantages of a particular method while avoiding the disadvantages. The paper presents general closed form of the system bit ...

System Dynamics evolved from Dynamic Systems often associated with classical mechanical engineering. However, today System Dynamics (SD) and Dynamic Systems (DS) are differentiated in theory and application. We believe that the link between SD and DS shall be reemphasized if not re-established in certain fields in order to advance system development and understanding. In some regulatory environ...

PERFORMANCE ANALYSIS OF DPSK/DS-CDMA SIGNALS OVER NAKAGAMI RADIO FADING CHANNELS by Ali A. Jamous Chairman: Dr. Ibrahim Ghareeb Direct sequence (DS) based code division multiple access (CDMA) with differential phase shift keying (DPSK) modulation is an active area of research and has taken on a significant role in recent cellular and personal communication systems. Two basic problems are of maj...

The distribution systems (DS) reconfiguration problem is formulated in this paper as a multi-objective mixed-integer linear programming (MILP) multi-period problem, enforcing that the obtained topology is radial in order to exploit several advantages those configurations offer. The effects of distributed generation (DG) and energy storage systems (ESS) are also investigated. To address the mult...

In this pa�, we suggest marry ing Dempster-Shafer (DS) theory w1th Knowledge Representation (KR). Born out of this marr iage is the defmition of "Dempster-Shafer Belief Bases", abstract data types representing uncertain knowledge that use DS theory for representing strength of belief about our knowledge, and the linguistic structures of an arbitrary KR system for representing the knowledge itse...