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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: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 14617.2-2012 | English | 459 |
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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 14617.2-2012
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| GB/T 14617.2-1993 | English | 599 |
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Propagation characteristics in land mobile service and fixed service. Part 2: Propagation characteristics for the terrestrial fixed service in 100-1000 MHz
| Obsolete |
GB/T 14617.2-1993
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PDF similar to GB/T 14617.2-2012
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| M30 | | Classification of International Standard | 33.060.30 | | Word Count Estimation | 20,230 | | Older Standard (superseded by this standard) | GB/T 14617.2-1993 | | Quoted Standard | GB/T 14617.3-2012 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | |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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