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Technology White Papers

3G White Papers


An Analysis of the Benefits of Uplink MIMO in Mobile WiMAX Systems - SEQUANS Communications

This paper discusses the improvements that uplink MIMO brings to Mobile WiMAX network deployments and introduces a new technique based on uplink MIMO, tile switched diversity (TSD). Uplink MIMO (UL-MIMO) provides extended coverage (up to 41 percent cell radius increase), and can also be used to reduce power consumption (up to 750 mW power savings) and greatly ease design constraints for high output power CPEs. Maximum performance is obtained when UL-MIMO is implemented both at the mobile station and the base station, but this analysis shows that significant gains can be achieved with UL-MIMO implemented at the mobile station only.

The Application of Land Use/Land Cover (Clutter) Data to Wireless Communication System Design - EDX

WiMAX White Paper from EDX

Land use/land cover (LULC) data can play a significant of role in designing wireless communication systems. It can be used to improve predictions of signal attenuation and other radio propagation effects and to assist in finding the optimal location of network base stations and other wireless system transmitters. It can also be utilized when projecting usage (traffic) trends in any type of mobile or nomadic system.

Go Green With The Evolution Series And FlatPack2 HE - Hutton Communications

WiMAX White Paper from Hutton Communications

The global telecom industry is a significant and rapidly growing consumer of energy. About 1% of total global energy is used by this industry. This is more than 160 billion kWh and over 118 million tons of CO2 and equivalent to about 16 million homes or 22 million cars. With the ongoing new deployment rate and capacity expansions needed for broadband, it is expected that the global energy need for this industry will increase by 50% within 5 years. Poor energy conservation and heavy pollution emissions have led to poor air quality in many countries and a real threat of global warming.

Tranzeo’s EnRoute500 Performance Analysis and Prediction - Tranzeo

Tranzeo has developed the EnRoute500 product family to provide an optimum balance between price and performance for wireless broadband mesh networks for public and private use. This white paper describes the aggregate network throughput and latency that an EnRoute500-based mesh network provides to WiFi clients that connect to it. Tranzeo offers a multi-layer solution to maximize the usable bandwidth available to the mesh in a given environment. Reductions in available bandwidth, due to noise or interference at the PHY layer, inefficiencies of the MAC layer such as perceived channel usage, or perceived congestion at the transport layer, all contribute to the degradation in performance and ability of a mesh network to scale. The EnRoute500 incorporates a tiered approach to ensure optimal use of available bandwidth resources.

A Comprehensive WiMAX™ Operator Business Case Process - WiMAX 20|20

WiMAX White Paper from WiMAX 20|20

Developing a WiMAX business case could be a complex and time-consuming process. Yet the need to determine the CapEx, OpEx and ROI is critical to any deployment. Promptly analyzing over 250 input variables, easily modifying these variables, testing key assumptions, and instantly visualizing their impact on a WiMAX business plan are invaluable capabilities. This white paper provides a step-by-step guide to a comprehensive WiMAX operator business case process and describes WiMAX 20/20’s WiROI™ Business Case Analysis Tool, which offers a range of capabilities to simplify and accelerate the process of building WiMAX business cases.

Improving Reliability for WiMAX Antenna Sites - Asentria

WiMAX White Paper from Asentria

Herbert’s insight into the importance of support devices holds up just as well in the twenty-first century world of communications as it did when first quoted in the seventeenth century world of warfare by horse. In the high-stakes battle of Internet providers, WiMAX represents the latest up-and-comer to challenge DSL and cable technologies. This new wireless technology is gaining attention for its ability to provide high-speed, high-throughput broadband connections over distances of up to 30 miles instead of a few hundred feet. Exhibiting a surprising amount of utility, WiMAX can be used for a number of different applications, including “last mile” broadband connections, cellular backhaul, and high-speed enterprise connections for businesses.

New Challenges For Spectrum Analyzers - Berkeley Varitronics Systems

WiMAX White Paper from Berkeley Varitronics Systems

The basic measurements performed by the spectrum analyzer, component loss or gain, power output, intermodulation, frequency response, phase noise and endless combinations of these have been around as long as the RF engineer. The explosion in use of cellular/wireless phones created new demands on analyzers. Now, in addition to the basic measurements, there was a need for measurements such as spectral regrowth, adjacent and alternate channel power, power amplifier turn on time, and vco switching speed, to name a few. Since time is money, automatically performing these measurements became a very useful feature as well as the ability to perform them outdoors.

Understanding the Radio Technologies of Mobile WiMAX - Alvarion

WiMAX White Paper from Alvarion

The merits of various radio technologies, and specifically mobile WiMAX, is an on-going debate as these technologies have a direct bearing on the capacity, coverage, quality of service (QoS), and, most importantly, the types of broadband applications that can be supported. Ultimately, the performance of the radios has a direct impact on the service and financial success of a service provider. Ranging from OFDM and OFDMA to deployment trade-offs, smart antennas, radio resource management and handoffs; there are many advanced algorithms and technologies available to meet the challenges of providing carrier-class mobile broadband services and ensuring a winning business model for the service provider.

Reducing the Cost to Serve the First WiMAX™ Subscribers - WiMAX 20|20

WiMAX White Paper from WiMAX 20|20

As more and more mobile carriers start deploying broadband wireless networks such as WiMAX, they are faced with the capital expenditures of the access network to provide coverage and that of the core network to provide connectivity. For small to mid-size deployments, the cost of the core network (ASN gateway plus IMS network elements) represents a large percentage of the initial CapEx. A radically consolidated, scalable core network architecture based on a new generation of multi-core processor technology from Sun Microsystems significantly reduces the cost of the core network thereby reducing the cost to serve the first WIMAX subscriber.

Capturing customers today with WiMAX 802.16d: The business and technology case for fixed WiMAX - Solectek

WiMAX White Paper from Solectek

As a Principal Member of the WiMAX™ Forum with experience manufacturing wireless equipment since 1989, Solectek Corporation has researched the merits of the 802.16d standard for fixed broadband wireless and the forthcoming 802.16e standard for fixed and mobile applications. Solectek believes that 802.16d, which is proven in the field and available today, is the best option for operators to immediately enhance revenues by capturing readily available customers, and that 802.16d will remain the dominate fixed WiMAX solution to the end of the decade or longer.

Lightning Protection - Alvarion

WiMAX White Paper from Alvarion

Lightning is the visible discharge of static electricity within a cloud, between clouds, or between the earth and a cloud. Scientists still do not fully understand what causes lightning, but most experts believe that different kinds of ice interact in a cloud. Updrafts in the clouds separate charges, so that positive charges flow towards the top of the cloud and the negative charges flow to the bottom of the cloud. When the negative charge moves downwards, a ”stepped leader” is created. The leader rushes towards the earth in 150-foot discrete steps, producing an ionized path in the air. The major part of the lightning discharge current is carried in the return stroke, which flows along the ionized path.

An overview of the key technology concepts and drivers behind the ADAPTIX FastSwitching-OFDMA™ Architecture - ADAPTIX

WiMAX White Paper from Adaptix

The ADAPTIX® Technology Primer is intended to give readers an overview of the key technology concepts and drivers behind the ADAPTIX FastSwitching-OFMDA™ architecture, and its use in next-generation broadband wireless networks for both Greenfield and established service provider deployments worldwide. The FastSwitching-OFDMA architecture is the cornerstone of the ADAPTIX operating system, built into the line of NewHorizon™ user Terminals and network Base Stations.

This document outlines the building blocks of the technology and their seamless integration, resulting in one of the most promising breakthroughs in the enablement and delivery of rich broadband wireless services across a wide variety of public and private deployment scenarios.

Primary Voice Services over BreezeMAX™ - Alvarion

WiMAX White Paper from Alvarion

As the broadband wireless market leader with many years experience supporting telephony services on its systems, Alvarion now introduces primary voice services over BreezeMAX, the world’s most popular WiMAX system. Targeted for both incumbent carriers with V5.2 switches and ‘innovative challenger’ carriers—such as CLECs and WISPs—interested in building or expanding all IP networks, BreezeMAX enables operators to offer primary voice services, while enjoying the benefits of an all IP solution.

E8869 Mobile WiMAX Wireless Library - Agilent Technologies

WiMAX White Paper from Agilent Technologies

The IEEE 802.16e standard, often referred to as Mobile WiMAX, specifies air interfaces for BWA systems. The standard is expected to energize the BWA industry and open many opportunities to deploy systems in applications that were previously cost-prohibitive. Mobile WiMAX utilizes roaming and handoff to enable laptop and mobile phones operation.

The Mobile WiMAX wireless library provides preconfigured simulation setups, signal sources and fully coded BER analysis for simulation of the circuitry used in mobile BWA designs.

Getting from Base Station to Subscriber: Exploring the Planning Myths - ATDI

WiMAX White Paper from ATDI

The search for new propagation modelling methods for WiMAX networks is largely a waste of time and effort, this paper asserts. Claims by many vendors that existing knowledge of propagation modelling is not applicable to WiMax networks is a contention that does not stand scrutiny. Rather, this paper suggests, a greater understanding of vendor equipment (transmitter, receiver and antenna system) and how it operates in real, multipath environments is needed. Counter arguments outlined in this paper are developed from existing knowledge of propagation at frequencies of up to 10GHz over paths of up to about 50km. A brief contrast is made with propagation above 10GHz.

Implementing VoIP Service Over Wireless Network - Alvarion

WiMAX White Paper from Alvarion

Voice over Internet Protocol (VoIP) technology facilitates packet based IP networks to carry digitized voice. With VoIP, competitive carriers and service providers can offer telephony (voice and fax) services together with traditional data services over the same IP infrastructure, and by doing so, increase revenue stream and improve business models.

Constructing a VoIP telephony service over a wireless IP network requires understanding of VoIP technology and the unique characteristics of the wireless medium to maximize call quality and capacity.

AdaptRate™ Solutions - BridgeWave

WiMAX White Paper from BridgeWave

It is a law of physics that rain downpours attenuate RF signals by scattering energy off of the desired path. This is especially true for radios with operating frequencies of over 10GHz, where most high-capacity point-to-point links operate. To deploy reliable high-frequency radio links, it is necessary to provision the links with enough RF link margin to prevent outages during periods of severe rainfall. Traditionally, for a given path distance and a required level of link availability, the only tools available were antenna size and link data capacity. Larger antennas increase link budget by better focusing energy between the two link end points, but increase link installation cost and time, as well as providing poorer link esthetics. Reducing data capacity improves link budget by using narrower frequency channels and/or allowing for the use of lower-order modulation, but typically results in reduced application performance. For longer required link distances, there are sometimes no acceptable choices for antenna size and data capacity, without accepting frequent cloudburst outages.

Standards versus Proprietary Solutions - Alvarion

WiMAX White Paper from Alvarion

WiMAX is a standards-based wireless technology providing high-speed data and voice services in networks covering long distances and wide ranges. WiMAX can be used for a number of applications including last mile broadband access, hotspot and cellular backhaul for carrier infrastructure, and highspeed enterprise connectivity. WiMAX is designed to provide E1-level bandwidth to businesses and the equivalent of cable/DSL access for home users. WiMAX will enable carrier-class solutions to scale to support thousands of users with a single base station, while providing differentiated service levels. For areas poorly served by wired infrastructure, WiMAX is expected to enable service providers to reach new businesses and residential customers, while reducing service costs.

WiMAX System Performance Studies - EDX

WiMAX White Paper from EDX

There are several ways of quantifying the performance of a broadband system. This paper will address two pressing issues of WiMAX system design which are interference and capacity analysis. This paper considers the factors affecting these two performance measures and discusses how to properly take these effects into account. The manuscript starts with an overview of WiMAX with focus on the relevant aspects in the standard that are necessary for these studies. The sections of interference and capacity analysis follow.

Technological Leapfrogging via WiMAX - NSR

WiMAX White Paper from NSR

It is a widely known fact that an inextricable link exists between telecom modernization and economic growth. Similar to the role of railroads and trains in the age of the industrial revolution, modernization of the IT/telecom sector in today's information age promotes economic growth and helps sustain the wealth of nations

The Evolution of Wi-Fi: From Hot Spots to Hot Zones to Municipal Networks - Proxim

WiMAX White Paper from Proxim

Wi-Fi technology has experienced unprecedented growth for both consumer and enterprise use in a very short time. The first IEEE 802.11b based products became available in 1999. Not long after that, the first wireless LAN hot spot was borne. With the freedom of wireless becoming available at very low prices, the desire to have anytime, anywhere connectivity in places where it was never before possible quickly grew. Soon, businesses from coffee shops to hotels and airports were putting Wi-Fi access points up for their guests to use.