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Mobile+and+Wireless+Communications

One of the very first books published on the social impact of the mobile phone was Timo Kopomaa’s The City in Your Pocket: Birth of the Mobile Information Society. The book, published in 2000, was based on research that Kopomaa had under- taken for Nokia and Sonera as part of his doctoral studies in the Centre for Urban and Regional Studies at the Helsinki University of Technology. The first line he writes in the book is peculiar: ‘Mobile communication is not a serious matter’. By this, we assume he is referring to a view of the world that would regard the mobile phone as little more than an unremarkable fact of everyday life – a simple play- thing for the young, or a productivity tool for the business executive and busy parent.

標(biāo)簽： Communications Wireless Mobile and

上傳時(shí)間： 2020-05-30

上傳用戶：shancjb
Ultra Wideband Signals and Systems 1st

In this book we focus on the basic signal processing that underlies current and future ultra wideband systems. By looking at signal processing in this way we hope this text will be useful even as UWB applications mature and change or regulations regarding ultra wideband systems are modified. The current UWB field is extremely dynamic, with new techniques and ideas being presented at every communications and signal-processing conference. The basic signal-processing techniques presented in this text though will not change for some time to come. Thus, we have taken a somewhat theoretical approach, which we believe is longer lasting and more useful to the reader in the long term than an up-to-the-minute summary that is out of date as soon as it is published.

標(biāo)簽： Wideband Signals Systems Ultra 1st

上傳時(shí)間： 2020-06-01

上傳用戶：shancjb
Fundamentals_of_Global_Positioning_System3

If one examines the current literature on GPS receiver design, most of it is quite a bit above the level of the novice. It is taken for granted that the reader is already at a fairly high level of understanding and proceeds from there. This text will be an attempt to take the reader through the concepts and circuits needed to be able to understand how a GPS receiver works from the antenna to the solution of user position.

標(biāo)簽： Fundamentals_of_Global_Positionin g_System

上傳時(shí)間： 2020-06-09

上傳用戶：shancjb
Feedback Control Theory

Striking developments have taken place since 1980 in feedback control theory. The subject has be- come both more rigorous and more applicable. The rigor is not for its own sake, but rather that even in an engineering discipline rigor can lead to clarity and to methodical solutions to problems. The applicability is a consequence both of new problem formulations and new mathematical solutions to these problems. Moreover, computers and software have changed the way engineering design is done. These developments suggest a fresh presentation of the subject, one that exploits these new developments while emphasizing their connection with classical control.

標(biāo)簽： Feedback Control Theory

上傳時(shí)間： 2020-06-10

上傳用戶：shancjb
Introduction to the Mathematical Theory 1

The purpose of this preface is twofold. Firstly, to give an informal historical introduction to the subject area of this book, Systems and Control, and secondly, to explain the philosophy of the approach to this subject taken in this book and to outline the topics that will be covered.

標(biāo)簽： Introduction Mathematical Theory the to

上傳時(shí)間： 2020-06-10

上傳用戶：shancjb
1 Seismic response control using electromagnetic

This paper presents a new type of electromagnetic damper with rotating inertial mass that has been devel oped to control the vibrations of structures subjected to earthquakes. The electromagnetic inertial mass damper (EIMD) consists of a ball screw that converts axial oscillation of the rod end into rotational motion of the internal flflywheel and an electric generator that is turned by the rotation of the inner rod. The EIMD is able to generate a large inertial force created by the rotating flflywheel and a variable damping force devel oped by the electric generator. Device performance tests of reduced-scale and full-scale EIMDs were under taken to verify the basic characteristics of the damper and the validity of the derived theoretical formulae. Shaking table tests of a three-story structure with EIMDs and earthquake response analyses of a building with EIMDs were conducted to demonstrate the seismic response control performance of the EIMD. The EIMD is able to reduce story drifts as well as accelerations and surpasses conventional types of dampers in reducing acceleration responses.

標(biāo)簽： electromagnetic response Seismic control using

上傳時(shí)間： 2021-11-04

上傳用戶：a1293065
基于STM32單片機(jī)的SPI雙機(jī)通信的Proteus仿真實(shí)現(xiàn)

以STM32F103單片機(jī)與STM32F103單片機(jī)之間進(jìn)行SPI雙機(jī)通信為例,直接使用DMA傳輸進(jìn)行數(shù)據(jù)的發(fā)送與接收,最后通過實(shí)驗(yàn)證明了DMA傳輸?shù)母咝Ш蜏?zhǔn)確性。with the SPI dual-MIC communication between STM32F103 MCU and STM32F103 MCU taken as an example,data transmission and reception are carried out directly by using DMA transmission to prove the efficiency and accuracy of DMA transmission by experiments.

標(biāo)簽： stm32 單片機(jī) spi 通信 proteus

上傳時(shí)間： 2022-03-27

上傳用戶：aben