·目錄1. Radio signals on the move 12. Antenna basics 193. Wire, connection, grounds, and all that 494. Marconi and other unbalanced ANTENNAs 695. Doublets, dipoles, and other Hertzian ANTENNAs 876. Limit
上傳時間： 2013-06-14
上傳用戶：lingduhanya
Radio Frequency Identifi cation (RFID) technology usesradiated and refl ected RF power to identify and track avariety of objects. A typical RFID system consists of areader and a transponder (or tag). An RFID reader containsan RF transmitter, one or more ANTENNAs and an RFreceiver. An RFID tag is simply an uniquely identifi ed ICwith an antenna.
上傳時間： 2013-10-17
上傳用戶：lepoke
ofdm信道特性 Channel transmission simulator Channel transmission simulator ％ ％ inputs: ％ sig2 - noise variance ％ Mt - number of Tx ANTENNAs ％ Mr - number of Rx ANTENNAs ％ x - vector of complex input symbols (for MIMO, this is a matrix, where each column ％ is the value of the antenna outputs at a single time instance) ％ H - frequency selective channel - represented in block-Toeplitz form for MIMO transmission ％ N - number of symbols transmitted in OFDM frame ％ ％ outputs: ％ y - vector of channel outputs (matrix for MIMO again, just like x matrix) ％ create noise vector sequence (each row is a different antenna, each column is a ％ different time index) note: noise is spatially and temporally white
標簽： transmission simulator Channel inputs
上傳時間： 2016-07-22
上傳用戶：kelimu
RECOMMENDATION ITU-R M.1678，Adaptive ANTENNAs for mobile systems
標簽： RECOMMENDATION ITU-R 1678
上傳時間： 2016-10-21
上傳用戶：tb_6877751
A paper that I presented on Supervisory Control and Data Acquisition (SCADA) won the second prize at the symposium conducted by the Electrical and Electronics Engineering department of the SRM University. Other topics on which I presented papers were Performance enhancement of wireless sensor networks using directional ANTENNAs, Smart card application and wireless communication. Also my research idea titled “Wavelet Based Image Compression Using SPIHT Algorithm “secured third prize in a technical festival.
標簽： Supervisory Acquisition presented Control
上傳時間： 2014-01-12
上傳用戶：zhouli
Homogeneous Partitioning of the Surveillance Volume discusses the implementation of the first of three sequentially complementary approaches for increasing the probability of target detection within at least some of the cells of the surveillance volume for a spatially nonGaussian or Gaussian “noise” environment that is temporally Gaussian. This approach, identified in the Preface as Approach A, partitions the surveillance volume into homogeneous contiguous subdivisions.
標簽： Receivers Adaptive ANTENNAs and
上傳時間： 2020-05-26
上傳用戶：shancjb
This book gives a comprehensive overview of the technologies for the advances of mobile radio access networks. The topics covered include linear transmitters, superconducting filters and cryogenic radio frequency (RF) front head, radio over fiber, software radio base stations, mobile terminal positioning, high speed downlink packet access (HSDPA), multiple antenna systems such as smart ANTENNAs and multiple input and multiple output (MIMO) systems, orthogonal frequency division multiplexing (OFDM) systems, IP-based radio access networks (RAN), autonomic networks, and ubiquitous networks.
標簽： Advances Networks Access Mobile Radio in
上傳時間： 2020-05-26
上傳用戶：shancjb
This book has grown out of my teaching and research at the University of Surrey and out of my previous experiences in companies such as Philips, Ascom and Motorola. It is primarily intended for use by students in master’s level and enhanced final-year under- graduate courses who are specialising in communication systems and wish to understand the principles and current practices of the wireless communication channel, including both antenna and propagation aspects
標簽： Propagation ANTENNAs
上傳時間： 2020-05-26
上傳用戶：shancjb
Employing multiple transmit and receive ANTENNAs, namely using multi-input multi-output (MIMO) systems, has proven to be a major breakthrough in providing reliable wireless communication links. Since their invention in the mid-1990s, transmit diversity, achieved through space-time coding, and spatial multiplexing schemes have been the focus of much research in the area of wireless communications.
標簽： Communication Systems Coding MIMO for
上傳時間： 2020-05-26
上傳用戶：shancjb
The rapid growth in mobile communications has led to an increasing demand for wide- band high data rate communications services. In recent years, Distributed Antenna Systems (DAS) has emerged as a promising candidate for future (beyond 3G or 4G) mobile communications, as illustrated by projects such as FRAMES and FuTURE. The architecture of DAS inherits and develops the concepts of pico- or micro-cell systems, where multiple distributed ANTENNAs or access points (AP) are connected to and con- trolled by a central unit.
標簽： Distributed Antenna Systems
上傳時間： 2020-05-27
上傳用戶：shancjb
