GB/T 14617.2-2012 English PDF

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GB/T 14617.2-2012: Propagation characteristics in land mobile service and fixed service -- Part 2: Propagation characteristics for the terrestrial fixed service in 100 MHz~1 000 MHz
Status: Valid

GB/T 14617.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14617.2-2012	459	Add to Cart	4 days	Propagation characteristics in land mobile service and fixed service -- Part 2: Propagation characteristics for the terrestrial fixed service in 100 MHz~1 000 MHz	Valid
GB/T 14617.2-1993	599	Add to Cart	4 days	Propagation characteristics in land mobile service and fixed service. Part 2: Propagation characteristics for the terrestrial fixed service in 100-1000 MHz	Obsolete

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YD/T 3710   YD/T 3709   YD/T 3708   GB/T 45112   GB/T 14618   GB/T 14617.1   

Basic data

Standard ID: GB/T 14617.2-2012 (GB/T14617.2-2012)
Description (Translated English): Propagation characteristics in land mobile service and fixed service -- Part 2: Propagation characteristics for the terrestrial fixed service in 100 MHz~1 000 MHz
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M30
Classification of International Standard: 33.060.30
Word Count Estimation: 20,230
Older Standard (superseded by this standard): GB/T 14617.2-1993
Quoted Standard: GB/T 14617.3-2012
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 work at 100 MHz ~ 1 000 MHz fixed service related communication features, including sight transmission over the horizon propagation, interference analysis and forest spread calculation. This section applies to 100 MHz ~ 1 000 M

GB/T 14617.2-2012: Propagation characteristics in land mobile service and fixed service -- Part 2: Propagation characteristics for the terrestrial fixed service in 100 MHz~1 000 MHz

---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.
ICS33.060.30 M30 National Standards of People's Republic of China Replacing GB/T 14617.2-1993 Land mobile service and fixed service propagation characteristics Part 2. 100MHz ~ 1000MHz The propagation characteristics of fixed service Part 2. Propagationcharacteristicsfortheterrestrial fixedservicein100MHz ~ 1000MHz 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 Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 sight propagation 4.1 free-space transmission loss 2 Attenuation due to ground interference 4.2 2 4.3 Diffraction loss is calculated 3 Probability forecast decline of 4.4 6 4.5 Interference transmission loss forecast horizon 6 5 BVR spread 6 5.1 Classification path propagation mechanism 6 5.2 Diffraction propagation 7 5.3 tropospheric scatter propagation 8 5.4 long transmission path loss 10 6 Forest dissemination 11 7 BVR interference 12 7.1 Analysis of interference path 12 7.2 interfering signal level 13 7.3 interference path transmission loss under different propagation mechanisms 13 7.4 different transmission interference path loss 14 References 16

Foreword

GB/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 2 GB/T 14617 in. Rules in this section in accordance with GB/T 1.1-2009 given draft. This Part replaces GB/T 14617.2-1993 "land mobile service and fixed service propagation characteristics of the second part. 100 ~ 1000MHz fixed service propagation characteristics. "This part of GB/T 14617.2-1993 compared to the major technical changes in addition to editorial changes outside 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 increasing demand in this standard references The standard name (see Chapter 2, Section 2 of the 1993 edition); --- Edit "3 definition of" is "3 Terms and definitions" (see Chapter 3, Section 3 of the 1993 edition); --- Modify 4.2 h1, h2 definition (see 42, 1993 version 4.2.); --- 4.3 modify the formula (13), formula (15) to (23), and Figures 2, 3, and modify the corresponding text description (see 4.3, 1993 Version 4.3); --- 5.2.4 modify the formula (25) to (33), and modify the corresponding text description [see 5.2 4, 1993 edition of 5.2.1.1.3 Of formula (26) to (35)]; --- Increase in d, f definition 5.3.1 (see 524, 1993 edition 5.2.1.2.1.); --- Increase in d, f definition 7.3.3 (see 733, 1993 version 7.3.3.); --- Increased when used in this section refer to the preparation of 3 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, Xu Hongmei, Zhao Hongfeng, Xu Tong. This section was first released in 1993, this is the first amendment. Land mobile service and fixed service propagation characteristics Part 2. 100MHz ~ 1000MHz The propagation characteristics of fixed service

1 Scope

This section GB/T 14617 provisions of the propagation characteristics of the work in the 100MHz ~ 1000MHz fixed service, including line of sight Spread over the horizon propagation, interference analysis and dissemination of forest calculation. This section applies to 100MHz ~ 1000MHz within small and medium-capacity analog communication systems and digital communication systems.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. Undated version of the latest edition (including any amendments) applies to this document. GB/T 14617.3-2012 land mobile service and fixed service propagation characteristics - Part 3. Biography sight radio relay systems Broadcast properties

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Radio horizon radiohorizon Straight ray emitted from the radio point sources (taking into account the effects of refraction) track the Earth's surface and tangent points. 3.2 Sight propagation line-of-sightpropagation Direct line and obstacles on the ground there is sufficient clearance and negligible spread between its two o'clock diffraction effects. 3.3 BVR spread trans-horizonpropagation Tropospheric propagation near the ground transmitter and receivers beyond the horizon point between the radio. 3.4 Tropospheric scatter propagation troposphere-scatterpropagation By means of tropospheric refraction scattering inhomogeneity and discontinuities caused by the index formed by tropospheric radio wave propagation. 3.5 Equivalent Earth radius factor effectiveearth-radiusfactor The equivalent ratio of the radius of the Earth and the Earth's radius. The vertical gradient coefficient and refractive index of the radius of the Earth with a related real. ......

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