LEADER 01683nam 2200481 450 001 9910466059403321 005 20200520144314.0 010 $a0-309-44060-2 035 $a(CKB)3710000000830185 035 $a(MiAaPQ)EBC4648299 035 $a(Au-PeEL)EBL4648299 035 $a(CaPaEBR)ebr11249403 035 $a(OCoLC)953999276 035 $a(EXLCZ)993710000000830185 100 $a20160906h20162016 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $2rdacontent 182 $2rdamedia 183 $2rdacarrier 200 00$aAdvancing the power of economic evidence to inform investments in children, youth, and families /$fEugene Steuerle and Leigh Miles Jackson, editors ; The National Academies of Sciences, Engineering, and Medicine 210 1$aWashington, District of Columbia :$cThe National Academies Press,$d2016. 210 4$d©2016 215 $a1 online resource (267 pages) 311 $a0-309-44059-9 320 $aIncludes bibliographical references at the end of each chapters. 606 $aChildren$zUnited States$vCongresses 606 $aFamilies$zUnited States$vCongresses 606 $aChildren$xGovernment policy$zUnited States$vCongresses 608 $aElectronic books. 615 0$aChildren 615 0$aFamilies 615 0$aChildren$xGovernment policy 676 $a301.4310973 702 $aSteuerle$b Eugene 702 $aJackson$b Leigh Miles 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910466059403321 996 $aAdvancing the power of economic evidence to inform investments in children, youth, and families$92043689 997 $aUNINA LEADER 05064nam 2200625 a 450 001 996206214603316 005 20230421053456.0 010 $a1-282-75644-3 010 $a9786612756443 010 $a0-470-93042-X 010 $a0-470-93226-0 035 $a(CKB)2670000000034257 035 $a(EBL)588871 035 $a(OCoLC)664572496 035 $a(SSID)ssj0000423304 035 $a(PQKBManifestationID)11280072 035 $a(PQKBTitleCode)TC0000423304 035 $a(PQKBWorkID)10441163 035 $a(PQKB)11315560 035 $a(MiAaPQ)EBC588871 035 $a(EXLCZ)992670000000034257 100 $a19921022d1993 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aMobile communications design fundamentals$b[electronic resource] /$fWilliam C.Y. Lee 205 $a2nd ed. 210 $aNew York $cWiley$dc1993 215 $a1 online resource (396 p.) 225 1 $aWiley series in telecommunications 300 $a"A Wiley-Interscience publication." 311 $a0-471-57446-5 320 $aIncludes bibliographical references and index. 327 $aMobile Communications Design Fundamentals; CONTENTS; Preface; Acknowledgments; Chapter 1 The Mobile Radio Environment; 1.1 Representation of a Mobile Radio Signal; 1.1.1 Description of a Mobile Radio Environment; 1.1.2 Field-Strength Representation; 1.1.3 Mobile Radio Signal Representation; 1.2 Causes of Propagation Path Loss; 1.3 Causes of Fading; 1.3.1 Long-Term Fading, m(t) or m(x); 1.3.2 Short-Term Fading, r0(t) or r0(x); 1.3.3 Classification of Channels; 1.3.4 Effects of Weather; 1.4 Reciprocity Principle; 1.5 Definitions of Necessary Terms and Their Applications; 1.5.1 Averages 327 $a1.5.2 Probability Density Function (pdf)1.5.3 Cumulative Probability Distribution (CPD); 1.5.4 Level-Crossing Rate (ler) and Average Duration of Fades (adf); 1.5.5 Correlation and Power Spectrum; 1.5.6 Delay Spread, Coherence Bandwidth, Intersymbol Interference; 1.5.7 Confidence Interval; 1.5.8 False-Alarm Rate and Word-Error Rate; References; Problems; Chapter 2 Prediction of Propagation Loss; 2.1 The Philosophy behind the Prediction of Propagation Loss; 2.2 Obtaining Meaningful Propagation-Loss Data from Measurements; 2.2.1 Determining the Length L 327 $a2.2.2 Determining the Number of Sample Points Required over 40?2.2.3 Mobile Path and Radio Path; 2.3 Prediction over Flat Terrain; 2.3.1 Finding the Reflection Point on a Terrain; 2.3.2 Classification of Terrain Roughness; 2.3.3 The Reflection Coefficient of the Ground Wave; 2.3.4 Models for Predicting Propagation Path Loss; 2.3.5 A Theoretical Model for Path Loss; 2.3.6 An Area-to-Area Path-Loss Prediction Model; 2.3.7 The Model of Okumura et al.; 2.3.8 A General Path-Loss Formula over Different Environments; 2.4 Point-to-Point Prediction (Path-Loss Prediction over Hilly Terrain) 327 $a2.4.1 Point-to-Point Prediction under Nonobstructive Conditions2.4.2 Point-to-Point Prediction under Obstructive Conditions-Shadow Loss; 2.5 Other Factors; 2.5.1 Foliage Effects; 2.5.2 Street Orientation Channel Effect; 2.5.3 The Tunnel and Underpass Effects; 2.6 The Merit of Point-to-Point Prediction; 2.7 Microcell Prediction Model; References; Problems; Chapter 3 Calculation of Fades and Methods of Reducing Fades; 3.1 Amplitude Fades; 3.1.1 Level-Crossing Rates; 3.1.2 Average Duration of Fades; 3.1.3 Distribution of Duration of Fades 327 $a3.1.4 Envelope Correlation between Two Closely Spaced Antennas at the Mobile Unit3.1.5 Power Spectrum; 3.2 Random PM and Random FM; 3.2.1 Random Phase ?r(t); 3.2.2 Random FM?r(t); 3.3 Selective Fading and Selective Random FM; 3.3.1 Selective Fading; 3.3.2 Selective Random FM; 3.4 Diversity Schemes; 3.4.1 Macroscopic Diversity (Apply on Separated Antenna Sites); 3.4.2 Microscopic Diversity (Apply on Co-located Antenna Site); 3.5 Combining Techniques; 3.5.1 Combining Techniques on Diversity Schemes; 3.5.2 Combining Techniques for Reducing Random Phase 327 $a3.6 Bit-Error Rate and Word-Error Rate in Fading Environment 330 $aRevised and enlarged version that discusses how to design a mobile communications system. 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