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The Journal of Law and Economics, Vol. 41, No. s2. (October 1998), pp. 523-528, doi:10.1086/467401
posted to property-rights spectrum
by pierredv
on 2013-05-23 03:01:24
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No. ECC/REC/(11)06.
Abstract
Block Edge Masks (BEM) are being developed as a new regulatory approach for the definition of a set of “common and minimal (least restrictive) technical conditions” optimised for, but not limited to, fixed/mobile communications networks. In this regulatory approach BEMs have been set into effect in order to provide a certain level of protection for wireless systems in adjacent frequency blocks and to reduce the necessity for coordination between the operators. BEMs are not intended to replace or relax limits set ...
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No. QINETIQ/06/00420 Issue 1.1. (February 2007)
posted to cognitive-radio cr ofcom qinetiq
by pierredv
on 2013-05-13 23:31:36
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No. QinetiQ/D&TS/COM/PUB0603673/Version 1.0. (March 2006)
Abstract
This document provides an evaluation of software defined radio (SDR). In an SDR, some or all of the signal path and baseband processing is implemented by software. That is, the term SDR refers to how the lower layer functionality is implemented. Crucially, the low level functionality of the radio in an SDR can be altered through changes to the software, without any physical changes to the hardware. SDRs represent a significant step in the evolution of radio. This document is the ...
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Abstract
Cognitive radios are expected to work in bands below about 3.5 GHz and may be used for a variety of applications, e.g., broadband fixed wireless access, mobile and nomadic access, etc. Cognitive radio system designers must have access to a wide range of channel models covering a wide span of operating frequencies, carrier bandwidths, deployment conditions, and environments. This paper provides a comprehensive overview of the propagation channel models that will be used for the design of cognitive radio systems. We ...
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(July 2012)
posted to sharing spectrum
by pierredv
on 2013-05-13 23:03:42
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posted to commons economics sharing spectrum
by pierredv
on 2013-05-11 00:16:01
Abstract
Ongoing regulatory reforms have led to several novel spectrum sharing models under the general umbrella of dynamic spectrum sharing. The private commons model introduced by FCC in 2004 allows spectrum licensees to provide secondary access to spectrum on an opportunistic basis while retaining ownership. Since wireless communication systems are typically overprovisioned in order to deliver service-level guarantees to (primary) users under short-term load variations, this model bears significant potential by facilitating utilization of temporal and spatial surplus of capacity through serving ...
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posted to policy sharing spectrum
by pierredv
on 2013-05-10 23:32:32
Abstract
There has been considerable effort to let more wireless devices operate in white space spectrum, that is within frequency bands and geographic areas where no wireless devices are active. Making white space available is certainly useful, but there are other sharing opportunities as well, some of which have been obscured by dangerous misconceptions about the concept of unused spectrum. This paper discusses allowing more devices to operate safely in gray space spectrum, that is spectrum that is actively being used in ...
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posted to economics experiment method
by pierredv
on 2013-05-08 21:26:59
Abstract
The methodological ideal of experimentalists, E, is easily stated: derive a testable hypothesis, H, from a well-specified theory, T; implement experiments with a design; implicitly in the latter are auxiliary hypotheses, A, that surface in the review/discussion of completed research reports (payoffs are 'adequate,' Ss are 'relevant,' instructions, context are 'clear,' etc.). We want to be able to conclude, if statistical test outcomes support not-H, that T is 'falsified.' But this is not what we do; rather we ask if there ...
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Abstract
In this paper we present results from the first application of robust geostatistical modeling techniques to radio environment and coverage mapping of wireless networks. We perform our analysis of these methods with a case study mapping the coverage of a 2.5 GHz WiMax network at the University of Colorado, Boulder. Drawing from our experiences, we propose several new methods and extensions to basic geostatistical theory that are necessary for use in a radio mapping application. We also derive a set of ...
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No. NTIA TR- 99-361. (December 1999)
posted to interference ntia radar satellite
by pierredv
on 2013-05-02 00:28:06
Abstract
The objectives of this report were to: 1) identify operational characteristics of representative Government radars operating in the 3.1-3.7 GHz frequency band, 2) outline a procedure for assessing the potential for EMI from these radars to adjacent-band FSS earth station receivers, and 3) identify methods for mitigating any received EMI. ...
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posted to extreme-value-theory statistics
by pierredv
on 2013-05-01 20:17:47
Abstract
<slide deck presented at (?) Concordia College> ...
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No. Number 99. (July 2011)
Abstract
Extreme value theory is concerned with the study of the asymptotical distribution of extreme events, that is to say events which are rare in frequency and huge with respect to the majority of observations. Statistical methods derived from this theory have been increasingly employed in finance, especially in the context of risk measurement. The aim of the present study is twofold. The first part delivers a critical review of the theoretical underpinnings of extreme value theory. The second part provides a ...
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(1987)
posted to environment pollution statistics
by pierredv
on 2013-05-01 19:44:42
Abstract
This book discusses a broad range of statistical design and analysis methods that are particularly well suited to pollution data. It explains key statistical techniques in easy-to-comprehend terms and uses practical examples, exercises, and case studies to illustrate procedures. Dr. Gilbert begins by discussing a space-time framework for sampling pollutants. He then shows how to use statistical sample survey methods to estimate average and total amounts of pollutants in the environment, and how to determine the number of field samples and ...
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Abstract
Recommendations to protect against harmful effects in human beings exposed to electromagnetic fields in the frequency range from 3 kHz to 300 GHz are provided in this standard. These recommendations are intended to apply in controlled environments and for general population exposure. These recommendations are not intended to apply to the exposure of patients by or under the direction of physicians and medical professionals. ...
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Accepted by Duke Law & Technology Review (forthcoming 2013) (2013)
posted to commons gps lightsquared property
by pierredv
on 2013-05-01 17:54:58
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Abstract
This application note discusses the different kinds of interference that operators will encounter in both current and new wireless environments. It introduces efficient and effective measurement techniques and instrument requirements for testing interference using modern highperformance spectrum analyzers such as Agilent FieldFox analyzers, which have the versatility and durability to make accurate measurements quickly in the field in harsh conditions and hard-to-reach locations. The classifications for different types of interference including in-band, co-channel, out-of-band and adjacent channel interference will also be discussed. ...
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(March 2013)
posted to ntia relocation
by pierredv
on 2013-04-30 16:55:14
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posted to path-loss propagation rf
by pierredv
on 2013-04-29 23:12:24
Abstract
In this paper we provide a thorough and up to date survey of path loss prediction methods, spanning more than 60 years of fairly continuous research. These methods take a variety of approaches to modeling the signal attenuation between wireless transceivers: purely theoretical models, empirically fitted (often statistical) models, deterministic ray-optical models, and measurement-directed methods. Our work here extends and updates excellent, but now dated prior surveys of this important field. We provide a new taxonomy for reasoning about the similarities ...
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No. JSC-PR-03-024.
posted to dod interference-analysis uav
by pierredv
on 2013-04-28 18:03:23
Abstract
Prepared for Air Combat Command UAV Special Mission Office (ACC/DR-UAV) The Predator Unmanned Aerial Vehicle (UAV) line-of-sight (LOS) command link (CL) and return link (RL) frequency assignments permit simultaneous operations of four General Atomics Aeronautical Systems Predator air vehicles at Indian Springs Air Force Auxiliary Field (ISAFAF). With increased operations of RQ-1/MQ-1 Predator and the introduction of MQ-9 Hunter-Killer (Predator B) operations, the requirement was identified for simultaneous operations of seven Predator UAVs at ISAFAF and an eighth set of frequencies for ...
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(22 January 2013)
posted to csmac interference satellite
by pierredv
on 2013-04-21 22:20:10
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(7 February 2011)
posted to spectrum uk use
by pierredv
on 2013-04-20 19:27:52
Abstract
CRFS conducted a mobile signal strength measurement campaign in the county of Devon for Ofcom in September and October 2010. We carried out a survey over a period of seven weeks, aiming to cover as many roads in Devon as possible and with a particular emphasis on rural roads given the potentially greater likelihood of 2G or 3G coverage issues in those areas. Overall, the majority of roads (62% of the road network) was surveyed, a high percentage given the rural ...
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posted to london spectrum use
by pierredv
on 2013-04-20 19:21:27
Abstract
In this paper we present results from a week long measurement campaign on spectrum use in London (UK). The measurements were conducted in order to understand the characteristics and especially the variability in spectrum use over different types of areas in a major metropolitan area. Three spectrum analyzers were used in the measurement campaign, one used for long-term measurements at a single location in a given area, with the other two used to sample spectrum use around the stationary measurement point. ...
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In Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), 2012 7th International ICST Conference on (June 2012), pp. 24-29
posted to europe spectrum use
by pierredv
on 2013-04-20 19:16:35
Abstract
In this paper we report on spectrum use measurements carried out synchronously over the period of 48+ hours in seven European cities. Special care has been placed on harmonizing the measurement settings and equipment so as to obtain as comparable data as possible. We describe in detail the measurement setup, including the coordinated preparation activities carried out across the different measurement sites. We present preliminary analysis of the obtained data set, and particularly highlight similarities and differences in spectrum use between ...
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No. Recommendation M.1635.
posted to cellular imt-2000 interference
by pierredv
on 2013-04-20 17:44:49
Abstract
Consideration of the potential for interference between IMT-2000 and systems beyond IMT-2000 and other services is essential for administrations in planning the use of frequency bands where the mobile service exists on a co-primary basis with other services. Networks of IMT-2000 and systems beyond IMT-2000 are likely to accommodate significant numbers of cellular customers and hence networks will require significant transmission capacity, involving the deployment of high-density infrastructures. This needs to be considered in analysis to assess sharing between IMT-2000 and systems beyond ...
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Abstract
We analyze data from NIST field tests in which radio-propagation channel path-loss values were measured at approximately the same physical locations where the performance of various RF-based firefighter distress beacons were tested. These side-by-side tests were made in two key representative emergency responder environments: a New York subway station and the Empire State Building. These environments contain propagation features that may impair radio communications, including stairwells, tunnels, and rooms deep within buildings. The goal of this work is to determine appropriate ...
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(June 2010)
posted to interference ofcom plt radio
by pierredv
on 2013-04-20 00:18:49
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In ITS India Conference 2012 (February 2012)
posted to broadband mobile spectrum value
by pierredv
on 2013-04-15 08:29:03
Abstract
This paper analyses the marginal value of spectrum through a focus on mobile broadband and with a case of Sweden and India. Radio spectrum is an essential asset and resource for mobile network operators as it determine the cost structure as well as ability to provide high capacity broadband services. With more spectrum, i.e. wider bandwidth, operators can offer higher capacity and data rates. Larger bandwidths means that capacity can be provided with fewer base station sites, i.e. with lower cost. ...
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No. TS 25.104.
posted to 3gpp specification umts
by pierredv
on 2013-04-14 18:32:48
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posted to cellular spectrum traffic
by pierredv
on 2013-04-14 15:02:41
Abstract
Data rates of mobile communications have increased dramatically during the last decade. The industry predicts an exponential increase of data traffic that would correspond to a 1000-fold increase in traffic between 2010 and 2020. These figures are very similar to ones reported during the last Internet boom. In this article we assess the realism of these assumptions. We conjecture that wireless and mobile Internet access will emerge as a dominant technology. A necessary prerequisite for this development is that wireless access ...
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No. M.1464-1 (06/03). (2003)
posted to characteristics itu-r radar
by pierredv
on 2013-04-06 15:22:26
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No. TR 25.942 V11.0.0 (2012-09). (September 2012)
posted to interference radio umts
by pierredv
on 2013-04-02 16:59:36
Abstract
The present document discusses system scenarios for UTRA operation primarily with respect to the radio transmission and reception. To develop the UTRA standard, all the relevant scenarios need to be considered for the various aspects of operation and the most critical cases identified. The process may then be iterated to arrive at final parameters that meet both service and implementation requirements. ...
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posted to networking user-experience
by pierredv
on 2013-03-25 23:14:47
Abstract
Quantifiable quality measures are necessary for VoIP service providers in order to offer services and be sure to keep users for their services. Existing methods used for evaluating the Quality of Experience (QoE) mostly rely on user survey and scores from the user, which are too subjective and need much processing time and cost. This paper proposes a pentagram model for measuring QoE. The model consists of five factors, including integrality, retainability, availability, usability, and instantaneousness. The experiments show that the ...
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Abstract
Strong jamming signals from colocated transmitters can cause intermodulation and desensitization in receiver circuits. Cancellation circuits can remove interference but generate noise and distortion of their own. We analyze such a system using a signal-to-interference-and-noise ratio (SINR) measure. We show that the cancellation coupler can be optimized to maximize the SINR. The optimum coupler value is proportional to the expected level of the jammers. A hardware prototype reduced the jammers by 46 dB in a controlled experiment and by 25 dB ...
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Abstract
In recent years, the quality of experience notion has become a major research theme within the telecommunications community. QoE is an assessment of the human experience when interacting with technology and business entities in a particular context. A communication ecosystem encompasses various domains such as technical aspects, business models, human behavior, and context. For each aspect of a communication ecosystem, various models have been developed. However, few models have been designed to integrate all aspects of a communication ecosystem to understand ...
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In Advanced Information Networking and Applications (WAINA), 2011 IEEE Workshops of International Conference on (March 2011), pp. 837-842, doi:10.1109/waina.2011.58
posted to networking user-experience
by pierredv
on 2013-03-25 17:24:29
Abstract
Service delivery and customer satisfaction are strongly related items for a correct commercial management platform. Technical aspects targeting this issue relate to QoS parameters that can be handled by the platform, at least partially. Subjective psychological issues and human cognitive aspects are typically unconsidered aspects and they directly determine the Quality of Experience (QoE). These factors finally have to be considered as key input for a successful business operation between a customer and a company. In our work, a multi-disciplinary approach ...
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Journal of Universal Computer Science, Vol. 14, No. 5. (2008), pp. 615-624
Abstract
Communications ecosystem covers a huge area from technical issues to business models and human behaviour. Due to this extreme diversity various societies need to discuss with each other, each of them using their own language. Engineers talk about network performance and quality of service, business people talk about average revenue per user and customer churn while behavioural scientists talk about happiness and experiences. Thus, everyone who wants to understand, or even analyze, the whole ecosystem, has to deal with all these diverse issues. ...
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posted to consciousness philosophy
by pierredv
on 2013-03-23 22:12:38
Abstract
The concept of consciousness has been the source of much confusion over the past two decades. Current orthodoxy in âconsciousness studiesâ has it that the key to understanding the concept of consciousness is to grasp the idea of qualia. But the appearance of mystery here is the product of conceptual confusion. There is nothing to âthe qualitative character of experienceâ beyond the individual character of a specific experience and how the subject felt in undergoing it, and here there are no ...
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posted to lte sharing
by pierredv
on 2013-03-19 21:58:02
Abstract
This paper investigates the feasibility and broad implications of the use of 3GPP LTE systems in license-exempt situations. License-exempt use can occur in traditional unlicensed bands or in secondary usage of white space spectrum. Various scenarios for license-exempt use are listed with a particular focus on spectrum access as a secondary user. Regulatory requirements devised by Federal Communications Commission (FCC) for TV white space usage are described and tabulated. General principles and recommendations for license exempt spectrum usage are proposed with ...
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(2011)
posted to filters receivers rf
by pierredv
on 2013-03-19 18:21:45
Abstract
Brief Description: Our miniature acoustic resonators perform RF filtering and frequency synthesis in nextgeneration wireless devices—offering higher performance in a smaller package with a lower price. ...
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(February 2012)
posted to ec sharing spectrum
by pierredv
on 2013-03-18 22:03:54
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posted to spectrum taxonomy
by pierredv
on 2013-03-16 18:39:16
Abstract
Current approaches to managing spectrum are polarized and inflexible. They underplay the value that license exemption and opportunistic access could deliver. This paper describes how new geolocation database technology could enable the use of hybrid models combining the advantages of licensing with those of license exemption. It considers how such models could help accelerate infrastructure investment for wireless broadband access, as well as facilitating innovation in wireless technology and services. ...
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posted to cognitive dsa radio sharing spectrum
by pierredv
on 2013-03-13 19:52:47
Abstract
Traditionally, interference protection is guaranteed through a policy of spectrum licensing, whereby wireless systems get exclusive access to spectrum. This is an effective way to prevent interference, but it leads to highly inefficient use of spectrum. Cognitive radio along with software radio, spectrum sensors, mesh networks, and other emerging technologies can facilitate new forms of spectrum sharing that greatly improve spectral efficiency and alleviate scarcity, if policies are in place that support these forms of sharing. On the other hand, new ...
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Social Science Research Network Working Paper Series (11 July 2012)
Abstract
Debates about the efcient use of radio spectrum are beset by a fundamental conundrum: although unlicensed spectrum has fostered tremendous innovation, is it plagued by a potential tragedy of the commons in which unfettered access renders it useless. There is disagreement if such tragedies occur and what, if anything can be done in technology and policy to delay or defuse such an effect. Surprisingly, given the heat of the debates, current evidence of a tragedy in the wireless commons is mostly ...
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(2003)
posted to itu-r radar standards
by pierredv
on 2013-03-07 22:11:34
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posted to efficiency spectrum
by pierredv
on 2013-03-06 21:58:25
Abstract
Achieving allocative and technically efficient spectrum management is a key aspect of deregulatory reforms in several OECD countries. However, reform legislation offers few clues as to how these objectives should rank when they conflict with one another. An ‘innocent’ prior acquisition of service-neutral spectrum at an efficiently run auction may prove allocative efficient but fail to be technically efficient if the spectrum is left fallow in the short term. Accountability for the productive usage of a public resource and pressures from ...
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(May 2011)
posted to management receivers spectrum
by pierredv
on 2013-03-05 22:30:25
Abstract
Radio frequency (RF) spectrum is a finite resource that is essential to many enterprises to include those of governments, militaries, businesses, and citizens. The broad utility of RF spectrum guarantees that demand for access will not wane and is likely to increase continuously. Obtaining greater utility from spectrum is universally beneficial. However, current trends to achieve greater utility have focused on prioritizing uses to those argued to be most beneficial or most effective, getting the most out of a particular use ...
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