GB/T 14617.3-2012 English PDFUS$1219.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 14617.3-2012: Propagation characteristics in land mobile service and fixed service -- Part 3: Propagation characteristics of line-of-sight radio-relay communications systems Status: Valid GB/T 14617.3: Historical versions
Basic dataStandard ID: GB/T 14617.3-2012 (GB/T14617.3-2012)Description (Translated English): Propagation characteristics in land mobile service and fixed service -- Part 3: Propagation characteristics of line-of-sight radio-relay communications systems Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: M30 Classification of International Standard: 33.060.60 Word Count Estimation: 55,579 Older Standard (superseded by this standard): GB/T 14617.3-1993 Quoted Standard: GB/T 14617.2 Regulation (derived from): National Standards Bulletin No. 41 of 2012 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the circuit design used for calculation of parameters such as clearance and Fresnel radius calculations, gas absorption and rain attenuation calculations, wave refraction, diversity reception, analog microwave fading probability an GB/T 14617.3-2012: Propagation characteristics in land mobile service and fixed service -- Part 3: Propagation characteristics of line-of-sight radio-relay communications systems---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS33.060.60 M30 National Standards of People's Republic of China Replacing GB/T 14617.3-1993 Land mobile service and fixed service propagation characteristics Part 3. sight radio relay communication The propagation characteristics of the system Part 3. Propagationcharacteristicsofline-of-sight Issued on. 2013-06-01 2012-12-31 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Table of ContentsIntroduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 main propagation factors and parameters 2 4.1 Several major wave propagation equation 2 4.2 The main parameters hop 3 4.3 Diffraction loss is calculated 6 4.4 gas absorption and rain attenuation 6 4.5 Refraction and classification 7 4.6 reflection 9 4.7 Cross-polarization discrimination (XPD) forecast 9 5 diversity reception of the parameters calculated 9 5.1 space diversity antenna spacing calculation 9 5.2 space diversity improvement of 9 Improve the degree of frequency diversity 10 5.3 6 and interrupt probability forecast decline rate of 11 6.1 analog microwave fading probability prediction method 11 6.2 Digital Microwave interrupt rate prediction method 11 Appendix A (normative) China rainfall intensity and water vapor density 12 A.1 Overview 12 A.2 Data sources and statistical methods 12 A.3 rainfall intensity contours and rain climatic zoning 14 A.4 typical rainfall intensity cumulative distribution site 18 A.5 different integration time rain intensity conversion relationship 19 A.6 worst month of rain intensity distribution 20 A.7 scale rain 20 A.8 rain attenuation rate and the contour map 21 A.9 rain reflectivity factor and the contour map 27 A.10 vapor density contour map 27 OK 31 Annex B (informative) distribution of rainfall intensity and decay rate parameters B.1 rain attenuation rate parameters k and q is determined 31 B.2 rain intensity R0.01 National Distribution 31 Annex C (normative) radio-meteorological data base 33 C.1 annual mean surface refractive index Ns contour maps and the average sea level contour maps of the refractive index N0 33 C.2 equivalent Earth radius factor in the value of the contour map 33 C.3 refractive index gradient near the ground 33 C.4 ground waveguide probability of occurrence of 33 Annex D (normative) cross-polarization discrimination (XPD) predicted 41 D.1 Scope 41 D.2 deterioration due to multipath fading caused by cross-polarization discrimination (XPD) 41 Due to deterioration caused by rain D.3 XPD (XPD) 41 Annex E (informative) analog microwave fading probability forecast 43 Two prediction methods E.1 China 43 Two calculation methods E.2 ITU-R 43 E.3 K1Q other countries and regions of the world, B, C value 44 Annex F (informative) digital microwave interrupt rate prediction methods 46 F.1 Scope 46 F.2 Method 1. a combination of fading Reserve Act (compositefademargin) 46 F.3 Method 2. linear amplitude dispersion method (lineramplitudedispersion) (LAD) 48 F.4 Method 3. Characteristic Curve (signature) 49 References 50ForewordGB/T 14617 "land mobile service and fixed service propagation characteristics" is divided into three parts. --- Part 1. Propagation characteristics in land mobile service; Part --- Article 2. 100MHz ~ 1000MHz fixed service propagation characteristics; --- Part 3. sight radio relay communication system propagation characteristics. This is Part 3 GB/T 14617 in. Rules in this section in accordance with GB/T 1.1-2009 given draft. This Part replaces GB/T 14617.3-1993 "land mobile service and fixed service propagation characteristics of the third part. sight radio-relay The propagation characteristics, "this part of the communication system and GB/T 14617.3-1993 compared, in addition to editorial changes outside the main technical changes are as follows. --- Edit "Subject Matter and Scope 1" to "1" and (see Chapter 1, Chapter 1 of the 1993 edition); --- Edit "2 reference standard" is "2 Normative references", and modify the text description, and to increase the standard required in this standard references Name (see Chapter 2, Section 2 of the 1993 edition); --- Edit "3 The term" to "3 Terms and definitions" (see Chapter 3, Section 3 of the 1993 edition); --- Modify 1, and modify the corresponding text description (see 421, 1993 version 4.1.2.); --- Modify the formula (7), (8), (9), and modify the corresponding text description (see 423, 1993 edition of the 4.2.3.); --- Modify the formula (12) (see 4241, 1993 edition of the 4.2.4.1...); --- Modify the formula (21) and modify the corresponding text description (see 442, 1993 edition of the 4.4.2.); --- Increase in formula (22) (see 4.4.2); --- Increase pw%, p% defined (see 4.4.2); --- Increase in N0, Ns, definitions 4.5.1.3 B (see 4.5.1.3); --- Modify the formula (38), formula (39), and modify the corresponding text description (see 51, 1993 edition of the 5.1 and 5.2.1.); --- Modify the formula (40) (see 521, 1993 version 5.2.1.); --- Modify tables in Appendix A A.1 Notes (see Appendix A, 1993 edition of Appendix B); --- Modify the entire contents of Appendix D (see Appendix D, 1993 edition of Appendix F); --- Modify the entire contents E.2 in Appendix E (see Appendix E, 1993 edition of Appendix D); --- Modify the formula (F.12) and the entire contents F.4 "(see Appendix F, 1993 edition of Appendix E); --- Increased when used in this section refer to the preparation of 5 ITU-R standard reference. This part is proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part of the jurisdiction of the China Communications Standards Association. This section drafted by. Datang Telecom Technology and Industry Group. The main drafters of this section. Fan Yongjun, Liu Tianlun, Zhao Hongfeng, Xu Hongmei, Ma Chen Yuan. This section was first released in 1993, this is the first amendment. Land mobile service and fixed service propagation characteristics Part 3. sight radio relay communication The propagation characteristics of the system1 ScopeThis section GB/T 14617 requirements calculation circuit designs commonly used in the relevant parameters, such as the calculation of clearance and Fresnel radius, gas Calculate body absorption and rain attenuation, wave refraction, diversity reception, digital and analog microwave fading probability microwave circuit interruption prediction rate and dissemination Characteristics of the radio-meteorological data, etc., and also given where applicable range of each parameter. The overall design of this section applies to a variety of capacity-sight radio-relay communication system and each band-of-sight radio relay communication circuits Design and various design compatible system and electromagnetic wave propagation characteristics related to.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 14617.2 land mobile service and fixed service propagation characteristics of the second part. 100 ~ 1000MHz spread fixed service characteristic3 Terms and DefinitionsThe following terms and definitions apply to this document. 3.1 Free space propagation freespacepropagation Electromagnetic wave in full uniform over the dielectric, and that it is spread extends infinitely in all directions. 3.2 Fresnel zone fresnelzone Space receive the focus point of a series of ellipsoid surrounded each of the points on the spherical surface and a transceiver to send and receive point distance The shortest path difference is an integral multiple of a half wavelength, n is the number multiples Fresnel zone. 3.3 Fresnel radius fresnelradius Fn Section radius of the circle in the Fresnel zone is perpendicular to the point of connection of the transceiver. 3.4 The refractive index of refractivity It is used to describe temporal and spatial variation of the refractive index of a parameter, which has the following relationship with the refractive index nr. N = (nr-1) × 106. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 14617.3-2012_English be delivered?Answer: Upon your order, we will start to translate GB/T 14617.3-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 14617.3-2012_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 14617.3-2012_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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