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This document discusses improving the bit error rate of OFDM transmission using turbo codes. It provides an overview of OFDM and its benefits, including its ability to combat multipath interference. However, OFDM results in burst errors that can degrade coding efficiency. The document proposes using turbo codes with OFDM since turbo codes can achieve performance close to the Shannon limit. It reviews the basic principles of turbo code design and encoding/decoding. The rest of the document outlines simulations done to test the performance of a turbo code combined with OFDM over AWGN and impulsive noise channels.

Nt ip brochure

Marleni Pedraza

This document provides information on the NT1 Plus network termination for ISDN. It allows connection of analogue phones and fax machines to an ISDN network, providing standard ISDN services. The NT1 Plus has dual POTS interfaces for connecting analogue devices, an So interface for up to 8 digital terminals, and supports pulse/DTMF dialling and standard supplementary services. It can be configured locally or remotely via DTMF commands and has diagnostic features accessible via the network.

Hiperlink optical 05 Ghz-lanrtx

The document describes an optical 5 GHz wireless system that uses fiber optic cables for input data, providing immunity to electromagnetic interference. It can be configured in a point-to-multipoint or point-to-point setup and has applications for wireless ISPs, security, and more. The system offers features like VPN, encryption, remote management and a IP67 waterproof casing for outdoor installation.

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This document describes the design and implementation of a wideband digital down converter (DDC) on an FPGA. It discusses the theoretical blocks of a DDC including a numerically controlled oscillator (NCO), mixer, cascaded integrate-comb (CIC) filter, compensation FIR filter, and programmable FIR filter. It also describes implementing each block using advanced methods and testing the design on an FPGA using Xilinx software and a Chip Scope Pro Analyzer tool. Simulation results showing the output at each DDC block are presented.

270 273

This document summarizes issues related to medium access control (MAC) protocols for wireless ad hoc networks. It discusses common MAC protocols like ALOHA, Slotted ALOHA, CSMA, and their variants. It also covers protocols specific to wireless networks like MACA, MACAW, and CSMA/CA. Additional topics covered include Bluetooth, wireless mesh networks, mobile ad hoc networks, and wireless sensor networks. Simulation tools for modeling wireless ad hoc networks are also mentioned.

Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Envi...

tipanagiriharika

The document proposes a scheme for ubiquitous content transfer in a hybrid networking environment. It addresses two key challenges: the heterogeneous network environment with differing coverage and access technologies, and a single user owning multiple devices that can directly connect. Existing solutions like MIP/NEMO are inefficient for local content transfer between devices. The proposed scheme uses a Personal Distributed Environment based on a Personal Distributed Manager to implement ubiquitous content transfer. It can improve performance by combining the advantages of MIP/NEMO and ad hoc modes for both intra- and inter-personal area network communication scenarios.

HIPERLINK 05G backhaul - IRTX

This document describes a 5 GHz point-to-point outdoor wireless backhaul system that provides high-speed wireless connectivity over long distances. It has integrated or external antennas, encryption, and throughput up to 108 Mbps. It is a robust and weather-resistant solution suitable for use by telecom carriers, integrators, and others to wirelessly connect networks or devices in a variety of environments and applications.

International Journal of Computational Engineering Research(IJCER)

ijceronline

This document discusses the implementation of an OFDM kernel for WiMAX systems. It begins with an introduction to OFDM and how it is used in WiMAX networks. It then provides an overview of the key components in the WiMAX physical layer, including bit-level processing, OFDMA symbol-level processing, and digital intermediate frequency processing blocks. It specifically focuses on the OFDM kernel, which includes the inverse fast Fourier transform, cyclic prefix insertion, fast Fourier transform, and cyclic prefix removal blocks. Finally, it discusses how FPGAs are well-suited for implementing OFDM kernels due to their high speed complex multiplication capabilities.

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Jose Paulino Soria Oliveros

The document analyzes the performance of LDPC coded WLAN physical layer under BPSK and 16-QAM modulation. It finds that an LDPC encoded WLAN system with a code rate of (48,46) performs best under BPSK modulation in an AWGN channel, achieving the lowest bit error rate. Simulation results show LDPC coding improves performance by reducing bit error rates compared to without coding. The best performing configuration provides power efficiency through lower transmitted power requirements for a given bit error rate.

IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...

IJERD Editor

The document analyzes the performance of a turbo coded WiMAX system over different communication channels, including AWGN, Rayleigh, and Rician channels. It describes the key components of the WiMAX physical layer, including randomization, forward error correction, interleaving, symbol mapping, and encoding of turbo codes. Simulation results are presented comparing the performance of the different channels, with AWGN showing better performance at higher numbers of turbo code iterations. With convolution coding alone performance was weaker, but turbo coding provided about a 7dB enhancement.

10 fn s26

Scott Foster

The document discusses requirements for efficient mobile backhaul with carrier Ethernet to support LTE networks. It covers: - LTE network architecture and how it impacts transport network requirements, including the need for multiservice capability, low cost per bit transport, and support for a transition to packet-based networks. - Key transport network requirements created by LTE like powerful OAM, fast protection switching, strong QoS support, security, and interoperability with the packet core. - How MPLS-TP can fulfill these requirements through features like VPN support, bearer provisioning across interfaces, coordinated tunnel setup, comprehensive OAM tools, and protection switching capabilities.

Widyatama.lecture.applied networking.iv-week-13.future internet networking

Djadja Sardjana

The document discusses future directions for internet architecture to accommodate emerging wireless and sensor networking needs. It proposes evolutionary, overlay, and revolutionary strategies. Evolution involves extending IP to support mobility and wireless scenarios. Overlays create new optimized networks working across the internet. Revolution specifies a new "beyond IP" network for mobile/wireless applications. All approaches aim to revise networking assumptions and design for new capabilities.

Analog to-digital conversion, 2e

Springer

This chapter discusses characterization and measurement techniques for analog-to-digital converters. It describes how converters are specified based on key parameters like integral nonlinearity (INL), differential nonlinearity (DNL), harmonic distortion, and more. Proper test hardware and methods are needed to accurately measure these parameters. The histogram method uses a sine wave input to statistically determine INL and DNL by comparing the measured code hit distribution to the theoretical distribution. At least 10×π2N samples are needed to specify INL and DNL to 0.1 LSB accuracy. Fourier analysis of the output samples measures harmonic distortion and requirements like coherent testing are discussed to avoid issues like frequency leakage.

Service Density By Xelerated At Linley Seminar

Xelerated

This document discusses carrier Ethernet service density and the Xelerated HX family of network processors. It defines service density as the amount of network services simultaneously supported by a packet processing device at wire speed. The two key components that determine service density are service processing and service classification/lookups. The presentation examines Xelerated's evolution in these areas over time and how its new HX330 and HX320 network processors achieve the highest levels of service density and efficiency in the industry. Details are provided on the architecture and capabilities of these 100Gbps HX processors.

Gg2612711275

IJERA Editor

This document summarizes the porting and optimization of the ITU-T G.729.1 speech coding algorithm to the SC3850 DSP core. The authors modified the reference G.729.1 code to fix-point C and optimized it for the SC3850 architecture through techniques like replacing functions with intrinsics, inlining small functions, and restructuring loops and memory accesses. They achieved over 90% improvement in cycles per second (MCPS) through these optimizations while maintaining bit-exact accuracy against the ITU test vectors. The G.729.1 codec is an 8-32 kbps scalable wideband speech codec standardized by ITU, useful for applications like VoIP, audio conferencing, and

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Aon Vs. Pon

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Active optical networks have advantages over passive optical networks in terms of bandwidth. With AONs, bandwidth allocation is flexible and each subscriber can be allocated from 100 Mbps to 1 Gbps. In contrast, PON bandwidth is determined by the splitting factor, with each subscriber receiving less bandwidth depending on the number of subscribers on the network. Upgrading bandwidth is also simpler with AONs, as subscribers can be upgraded by changing fiber optic leads or boards. However, PONs allow for higher subscriber counts due to their point-to-multipoint topology.

10 gpon information technology interfaces, 2007. iti 2007. 29th internationa...

ngoctrampnt

Gigabit Passive Optical Network (GPON) is defined by ITU-T recommendations and has enhanced capabilities compared to earlier PON technologies. GPON uses only active equipment at the Optical Line Termination (OLT) located at the central office and Optical Network Units (ONU) located at user sites. It can transport Ethernet, ATM, TDM and PSTN traffic using the GPON Encapsulation Method (GEM). The paper provides an overview of GPON network architecture, transmission mechanisms such as forward error correction and dynamic bandwidth allocation, and analyzes the power budget in GPON systems.

Gponfundamentals short

This document provides an overview and analysis of GPON (Gigabit-capable Passive Optical Network) standards and technologies. It describes the basic concepts of PON networks including network architecture, upstream and downstream data transmission principles, and frame structures. It also analyzes key GPON standards from standards bodies like ITU-T and compares GPON to EPON. The document aims to give the reader an understanding of GPON networks, standards, and technologies.

Passive Optical Networks

fanttazio

Passive optical networks (PONs) provide fiber connectivity to multiple end users using a point-to-multipoint architecture and passive splitters to reduce costs. PONs use a single fiber to the premises, with a passive optical splitter used to feed multiple end users. This allows for fiber-based connectivity at costs similar to copper. Common PON types include GPON, EPON, and BPON. PONs employ wavelength division duplexing with different wavelengths for downstream and upstream traffic and time division multiple access for upstream transmissions.

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Introduction to LTE

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Nt ip brochure

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Ubiquitous Personal Content Transfer in a Heterogeneous Wireless Network Envi...

tipanagiriharika

HIPERLINK 05G backhaul - IRTX

International Journal of Computational Engineering Research(IJCER)

ijceronline

115 118

Jose Paulino Soria Oliveros

IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...

IJERD Editor

10 fn s26

Scott Foster

Widyatama.lecture.applied networking.iv-week-13.future internet networking

Djadja Sardjana

Analog to-digital conversion, 2e

Springer

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Xelerated

Gg2612711275

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HIPERLINK 05G backhaul - IRTX

International Journal of Computational Engineering Research(IJCER)

115 118

IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...

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Widyatama.lecture.applied networking.iv-week-13.future internet networking

Analog to-digital conversion, 2e

Service Density By Xelerated At Linley Seminar

Gg2612711275

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The document discusses the challenges of future packet networks and fiber-to-the-home (FTTH) deployment alternatives. It argues that next generation access networks will be based on fiber deployments using Gigabit-capable Passive Optical Network (GPON) technology. GPON is presented as the best candidate due to its pragmatic and simple approach in addressing all services while requiring less space and equipment at lower costs than other alternatives. The document also summarizes how GPON Doctor can help monitor and analyze GPON network traffic and performance.

Active Technologies, The Sky is the limit

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The needs of fixed access operators are expanding beyond just providing more bandwidth. There are various other drivers for optical access, with different timeframes of need. Some of these can be met with existing fiber technologies, and some will require new technologies. The industry is considering several next generation PON architectures, each addressing the needs and timeframes to varying degrees. Authors: Ed Harstead & Michael Peeters

Rpl telecom bretagne

Pascal Thubert

The document discusses the fringe of the Internet, which includes low power lossy networks (LLNs) connected by radio links. It describes characteristics of LLNs like highly constrained devices, small frame sizes, and energy efficiency requirements. The routing protocol for LLNs needs to be adapted to these types of links. The document outlines different approaches for connecting LLNs to the Internet, including mesh under, route over, and overlay models. It introduces RPL as an IETF routing protocol designed for routing over radio in LLNs.

2Fonet GEPON Presentation

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This document discusses GEPON (Gigabit Ethernet Passive Optical Networks), a fiber access technology for point-to-multipoint broadband access. It provides an overview of GEPON components including OLT, ONU, POS, and ODN. GEPON uses single fiber WDM with downlink at 1490nm and uplink at 1310nm, and can provide up to 1Gbps symmetrical bandwidth over distances up to 20km. The advantages of GEPON include high speeds, long transmission lengths, supporting data/voice/video, low maintenance requirements, and compatibility with Ethernet standards. The document also describes 2Fonet's GEPON products including the OLT3000 which can connect to

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The document discusses EPON (Ethernet passive optical network) solutions provided by SUN Telecom. It provides an introduction to EPON technology, outlines the key benefits such as high bandwidth, lower costs, and longer transmission distances. It then describes SUN Telecom's EPON product line, including OLTs, ONUs, splitters, and EMS software. Typical applications that can benefit from EPON include FTTC, FTTB, and FTTH network deployments.

35992488 gpon-fundamentals-20070606-a

Truong_RFD

The document is about a training course on GPON fundamentals. It discusses the objectives of describing GPON network architecture, basic concepts, and applications. It outlines the contents which will cover an overview of optical access networks, basic PON concepts, GPON frame structure, key technologies, management, provisioning, and basic services over GPON. Standards referenced include ITU-T G.984.1 to G.984.4.

Gpon Fundamentals

mansoor_gr8

The document discusses key concepts and technologies of GPON (Gigabit-capable Passive Optical Networks), including: 1) The basic architecture of PON networks consisting of an OLT, ONUs, and a passive optical splitter. 2) Reasons for adopting the GPON standard such as supporting high-bandwidth transmission and long reach. 3) Key GPON technologies including ranging, equalization delay, dynamic bandwidth assignment (DBA), and wavelength division multiplexing (WDM) for upstream/downstream transmission.

Gpon Fundamentals

mansoor_gr8

This document provides an overview of GPON (Gigabit-capable Passive Optical Networks) technology. It describes the basic concepts and architecture of PON networks, including how they use passive splitters and wavelength division multiplexing. GPON is introduced as the choice for carriers due to its ability to support high-bandwidth, long-reach transmission over fiber for triple-play services. The document then covers GPON principles such as downstream broadcast and upstream TDMA transmission, as well as standards, performance parameters, and network protection modes.

Future of wire line access networks

Anuradha Udunuwara

This document discusses future access network technologies. It begins by introducing different access network architectures using copper or fiber connections to end users. The key criteria for designing access networks are meeting future bandwidth demands cost-effectively based on user forecasts. While copper remains an option if already deployed, fiber is more future-proof due to its vast bandwidth. Passive optical networks (PON) using fiber to the home/building are discussed as the most common fiber architecture. Different PON technologies like GPON, EPON, and upcoming WDM PON are summarized.

Hybrid fiber powerline communicatiion (hfpc)

Broto Santoso

The document discusses hybrid fiber powerline communication (HFPC) as a new solution to deliver internet services that combines fiber optics and powerline communication (PLC). HFPC uses aerial fiber optic cables on medium voltage poles for backhaul and PLC to connect to consumers over low voltage powerlines. This allows internet access through any electrical outlet in a home while reducing costs compared to all-fiber networks. The technology provides high bandwidth to support services like IPTV and allows for both PLC and direct fiber connections.

Discover Optical Ethernet V5

The document discusses how optical Ethernet can help telecommunications networks meet increasing bandwidth demands from new services like HD video. It describes how optical Ethernet provides gigabit capacity to multiple homes using fiber to the home infrastructure. It also summarizes how networks can smoothly migrate to optical Ethernet by upgrading existing DSL networks or migrating leased line services.

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