Broadband Interference Suppression using Volterra Filters ab 39.99 € als Taschenbuch: . Aus dem Bereich: Bücher, Wissenschaft, Technik,
Wireless networking ab 43.99 € als Taschenbuch: List of ad hoc routing protocols Wireless LAN Personal area network Wireless network Direct-sequence spread spectrum Packet analyzer Wireless broadband IP over Avian Carriers Intersymbol interference Wireless mobility management. Aus dem Bereich: Bücher, Ratgeber, Computer & Internet,
Broadband Interference Suppression using Volterra Filters ab 39.99 EURO
Ever Since the future fifth generation (5G) mobile networks broadband was introduced, many researchers, engineers, and technicians questioned the challenges and problems associated with this promising deployment of cellular networks. As Inter-Cell Interference (ICI) produced by the usage of the same spectrum which creates major issues by reducing the system output and network capacity as well as some other challenges which need to be addressed by the engineers. In this Book, we tackle the resource and power division problem in multiuser Orthogonal Frequency Division Multiple Access (OFDMA) networks such as 5G, LTE/LTE-A networks, and dense small cell networks. Also, we will provide a hybrid ICIC scheme as a negotiation between the integrated and the decentralized methodologies. For a cluster of adjacent cells, resource and power allocation decisions are made collectively. This book targets the academic researchers as well as the engineers and technicians who are interested in Fifth Generation (5G) networks and those who are interested in providing a solution for the problems mentioned above.
Femtocell is a low power, low cost, user installed small device which connects the mobile user to its core network directly by using the fiber optics or broadband connection to improve the coverage of mobile network inside home/offices. Femtocell is a best solution to improve coverage of mobile communication at indoors particularly. There are lots of challenges for implementing femtocell in real world. In this book, location management problem has been solved which is a basic problem in any mobile communication and tried to find out how, one can take advantage of femtocells technology in Green Technology which is a technology in which power consumption of any device or machine should be less but efficiency should be more compare to its old type. Hence, Femtocell is best suitable in Green Technology. Technique to reduce femtocells interference compared to macrocell is implemented as they both transmit the same frequencies and that's why a new mechanism of uplink power control for two-tier femtocells has been implemented in two tier CDMA network. Interference Analysis for femtocell Deployment in OFDMA Systems based on FFR (Fractional Frequency Reuse) is also covered in this book.
Radio transmissions have grown hugely since the early ontogeny in the late nineteenth and the starting of twenty centuries and immediately influenced the lives of users in every corner of the world. A. To satisfy and cater the escalating requirements, new broadband transmission technologies have been presented to utilize radio spectrum effectively. This research work explores beam forming and two-way relaying to alleviate the dual issues of the spectrum congestion and spectrum underemployment. These troubles can be relieved by the implementation of underlay cognitive radio networks. Nevertheless, their reliability, capacity or power, and coverage depend on bidirectional or abbreviated as primary-to-secondary or abbreviated as P2S and secondary-to primary or abbreviated as S2P interference constraints.
Wireless Mesh Networks (WMNs) are a special kind of ad hoc networks in which most of the nodes are static. Different from ad hoc networks, a mesh network introduces a hierarchy in the network architecture and provides broadband wireless Internet access to users. Recent studies have shown that nodes in a WMN are equipped with several radio interfaces for better performance. The aggregate capacity of WMNs can be significantly improved by providing each node with several Wireless Network Interface Cards (WNICs) and by using multiple channels. This is in order to minimize interference and to provide high performance. However, multiple WNICs in each node require a channel assignment planning. The channels have to be assigned in such a way that interferences decrease and the performance increases at the same time. Since the number of available channels is limited, it is desired to dynamically allocate channels on demand.In this research, we address the problem of assigning channels to nodes in WMNs. For this purpose, we introduce the Distributed Cluster Channel Assignment (CCA) algorithm with the objective of reducing network interferences to increase the overall performance of the network. This clustering approach is employed in order to simplify the method of solving the channel assignment problem in terms of complexity. One of the advantages of this approach is that the possibility to reuse the channels in different clusters. In addition, a dynamic channel assignment is proposed for the aforementioned problem. This approach is called Neighborhood Nodes Collaboration to Support QoS (NNCQ). NNCQ is adaptive to the load in WMNs and supports Quality of Service (QoS) routing. The algorithm adds or selects a channel for heavily loaded nodes based on the local information of the neighbor nodes. The selected or added channel minimizes interferences and ensures network connectivity.
The efficient utilisation of allocated spectrum for mobile and wireless communication systems has become an important issue due to the increasing number of users and services. Distortion and interference impedes high bit rate transmission and degrades spectrum efficiency by allowing fewer channels in the available bandwidth. Increasing the talk time of mobile equipment requires extending the battery life. The power amplifier is one of the most non- linear and power consuming parts in a transceiver. Extensive research has been carried out on several amplifier linearization schemes to force these devices to deliver maximum efficiency while generating less distortion. The importance of linearity has increased with the introduction of third generation systems and Software Defined Radio concept. These applications require excellent linearity together with broadband operation, which are contradictory properties and achieving one without compromising the other is a challenging task. This book presents harmonic injection and analog polynomial predistortion techniques as potential solutions to these challenges in RF/microwave amplifier design.
Today, the bottleneck for residential fast Internet communication and other broadband services lies in the access network, the last drop of cabling or wireless infrastructure connecting the individual subscribers with the network. Amongst the innovative access networks that are being deployed worldwide, the Passive Optical Network (PON) is one of the most promising technologies. Besides the high data capacity and strong immunity from the electronical interference proper to fibre, one of the big advantages of the PON system is that all active components between access node and the customer premises are eliminated, effectively creating a transparent glass pipe with a long projected lifetime and an enormous bandwidth capability. The Gigabit PON (GPON) is one of the most advanced PON protocols, offering multiple-service support with the richest possible set of Operation, Administration and Maintenance (OAM) features. This research includes two topics, the design and validation of a high-speed embedded control platform containing hardware and software and the study of channel coding in the upstream to improve the performance of the burst-mode GPON uplink physical layer.