We consider the problem of target localization by a network of passive sensors. When an unknown target emits an acoustic or a radio signal, its position can be localized with multiple sensors using the time difference of arrival (TDOA) information. In this paper, we consider the maximum likelihood formulation of this target localization problem and provide EFFICIENT convex relaxations for this nonconvex optimization problem.We also propose a formulation for robust target localization in the presence of sensor location errors. Two Cramer-Rao bounds are derived corresponding to situations with and without sensor node location errors. Simulation results confirm the efficiency and superior performance of the convex relaxation approach as compared to the existing least squares based approach when large sensor node location errors are present.
標(biāo)簽： 傳感器網(wǎng)絡(luò)
上傳時(shí)間： 2016-11-27
上傳用戶：xxmluo
Libsvm is a simple, easy-to-use, and EFFICIENT software for SVM classification and regression. It solves C-SVM classification, nu-SVM classification, one-class-SVM, epsilon-SVM regression, and nu-SVM regression. It also provides an automatic model selection tool for C-SVM classification.
標(biāo)簽： LibSVM
上傳時(shí)間： 2019-06-09
上傳用戶：lyaiqing
The understanding of electrical system design has become increas- ingly important, not only to the electrical designer, but to safety, plant and project engineers as well. With the advent of high energy costs, plant and project engineers have needed to become more aware of electrical systems. Both safety and energy efficiency will be covered in this text along with practical application problems for industrial and commercial electrical design.
標(biāo)簽： Electrical EFFICIENT Handbook Systems Design
上傳時(shí)間： 2020-05-25
上傳用戶：shancjb
The contemporary view of the Smart City is very much static and infrastructure- centric, focusing on installation and subsequent management of Edge devices and analytics of data provided by these devices. While this still allows a more EFFICIENT management of the city’s infrastructure, optimizations and savings in different do- mains, the existing architectures are currently designed as single-purpose, vertically siloed solutions. This hinders active involvement of a variety of stakeholders (e.g., citizens and businesses) who naturally form part of the city’s ecosystem and have an inherent interest in jointly coordinating and influencing city-level activities.
標(biāo)簽： Internet Systems Cities People Things Smart The and of
上傳時(shí)間： 2020-05-26
上傳用戶：shancjb
From the transition of analog to digital communication along with seamless mobility and high computing power of small handheld devices, the wireless communications industry has seen tremendous changes leading to the integration of several telecommunication networks, devices and services over last 30 years. The rate of this progress and growth has increased particularly in the past decade because people no longer use their devices and networks for voice only, but demand bundle contents such as data download/streaming, HDTV, HD video , 3D video conferencing with higher efficiency, seamless connectivity, intelligence, reliability and better user experience. Although the challenges facing service providers and telecommunication companies differ by product, region, market size, and their areas of concentration but time to market, EFFICIENT utilization of their assets and revenue expansion, have impacted significantly how to manage and conduct their business while maintaining sufficient margin.
標(biāo)簽： Convergence Networks Beyond 4G of
上傳時(shí)間： 2020-05-26
上傳用戶：shancjb
Traditional modulation methods adopted by space agencies for transmit- ting telecommand and telemetry data have incorporated subcarriers as a sim- ple means of separating different data types as well ensuring no overlap between the radio frequency (RF) carrier and the modulated data’s frequency spectra.
標(biāo)簽： Bandwidth-EFFICIENT Modulation Digital
上傳時(shí)間： 2020-05-26
上傳用戶：shancjb
The book you’re holding, physically or electronically, is the result of a very interesting, challenging but also rewarding research project. The research was carried out in different contexts and cooperations but it was centered around the following question: how can we make the RF transmitters of our modern com- munication systems (WiFi, GSM, LTE, and so on) more flexible and more EFFICIENT at the same time.
標(biāo)簽： Continuous-Time Front-Ends Digital
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Engineers are professional inventors, researchers, and developers. Education imbues each engineer with discipline-specific knowledge. Combining the different disciplines allows engineers to solve more complex problems.
標(biāo)簽： Energy-EFFICIENT Communication Processors
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Providing QoS while optimizing the LTE network in a cost EFFICIENT manner is very challenging. Thus, radio scheduling is one of the most important functions in mobile broadband networks. The design of a mobile network radio scheduler holds several objectives that need to be satisfied, for example: the scheduler needs to maximize the radio performance by EFFICIENTly distributing the limited radio re- sources, since the operator’s revenue depends on it.
標(biāo)簽： Communications Future Mobile LTE
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Thisbookfocusesontheemergingresearchtopic‘green(energy-EFFICIENT)wirelessnetworks’ that has drawn huge attention recently from both academia and industry. This topic is highly motivated due to important environmental, financial and quality-of-experience (QoE) consid- erations.Duetosuchconcerns,varioussolutionshavebeenproposedtoenableEFFICIENTenergy usage in wireless networks, and these approaches are referred to as green wireless communi- cations and networking. The term ‘green’ emphasizes the environmental dimension of the proposed solutions. Hence, it is not sufficient to present a cost-effective solution unless it is eco-friendly.
標(biāo)簽： Green_Heterogeneous_Wireless_Netw orks
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
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