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GB 13616-2009: [GB/T 13616-2009] Electromagnetic environment protection requirements for digital radio-relay stations
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[GB/T 13616-2009] Electromagnetic environment protection requirements for digital radio-relay stations
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Electromagnetic environment protection requirements for microwave relay stations
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PDF similar to GB 13616-2009
Basic data | Standard ID | GB 13616-2009 (GB13616-2009) | | Description (Translated English) | [GB/T 13616-2009] Electromagnetic environment protection requirements for digital radio-relay stations | | Sector / Industry | National Standard | | Classification of Chinese Standard | M04 | | Classification of International Standard | 33.100 | | Word Count Estimation | 16,147 | | Date of Issue | 2009-05-05 | | Date of Implementation | 2010-07-01 | | Older Standard (superseded by this standard) | GB 13616-1992 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 6, 2009 (No. 146 overall) | | Issuing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 Chinese standard specifies the digital microwave relay stations allowed values ??of electromagnetic interference environment, the antenna front clearance zone requirements as well as digital microwave relay stations electromagnetic environment testing. This standard applies to working frequency of 1 GHz ~ 40 GHz digital microwave radio relay transmission systems sight stations. This standard does not apply to tropospheric scatter microwave stations. | GB 13616-2009: [GB/T 13616-2009] Electromagnetic environment protection requirements for digital radio-relay stations
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Electromagnetic environment protection requirements for digital radio-relay stations
ICS 33.100
M04
National Standards of People's Republic of China
Replacing GB 13616-1992
Digital microwave radio relay station electromagnetic environment protection requirements
Posted 2009-05-05
2010-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 1 source of interference
5 allows interference value 1
6 digital microwave radio relay station electromagnetic environment Test Method 2
7 front of the antenna Clearance Requirements 2
Appendix A (normative) digital microwave radio relay station electromagnetic environment testing methods 4
Annex B (informative) interference level calculation formula of the major 6
Space Annex C (informative) antenna aperture at the interference signal power flux-density conversion 8
Relations Annex D (informative) BER and SNR 9
Annex E (informative) digital microwave radio relay station siting requirements 10
References 11
1 antenna front clearance zone 3
Figure A. 1 Test System 4
Table 1 interference from geostationary satellite communication system to allow the value of 2
Table A. 1 spectrum analyzer sensitivity index requirements 4
Foreword
All the technical contents of this standard is mandatory.
This standard replaces GB 13616-1992 "microwave relay station electromagnetic environment protection requirements."
This standard compared with GB 13616-1992 main changes are as follows.
--- Changing the name of the standard;
--- Updated the standard normative references;
--- Update the technical requirements to allow interference values;
--- The original Appendix A has been modified. changes A. 1, A. 3. Delete A. 2, modified as a new Appendix B;
--- Appendix B of the original has been modified. rewritten B. 1, and as a new Appendix A; the original B. 1.3.4 modified the original
B. 3 merge as a new Appendix C; delete the original B. 2;
--- Appendix C of the original has been modified, and the modification is to move the body;
--- Adds a new appendix. Appendix D.
The standard reference method and the corresponding calculation error related to the performance of assigned ITU Recommendation given in digital microwave radio relay system
And other technical parameters, combined with the technical features of our current relevant industry technical specifications and digital microwave radio relay station.
Appendix A of this standard is a normative appendix, Appendix B, Appendix C, Appendix D and Appendix E is an informative annex.
This standard by the National Standardization Technical Committee on Radio Interference (SAC/TC79) and focal points.
This standard was drafted. SRMC.
The main drafters of this standard. Liu Bin, Lijing Chun, Tan Haifeng, ZHOU Xing-guo, Huang Biao, Party arrows.
This standard replaces the standards previously issued as follows.
--- GB 13616-1992.
Digital microwave radio relay station electromagnetic environment protection requirements
1 Scope
This standard specifies the digital microwave radio relay station electromagnetic interference environment to allow the value of the antenna in front of the clear zone requirements, and digital microwave relay station power
Magnetic environmental testing methods.
This standard applies to working frequency of 1GHz ~ 40GHz horizon digital microwave radio relay transmission system station.
This standard does not apply to tropospheric scatter microwave stations.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB 4824-2004 industrial, scientific and medical (ISM) radio-frequency equipment - Electromagnetic disturbance characteristics - Limits and methods of measurement (CISPR11.
2003, IDT)
YD/T 5088-2005 SDH microwave relay systems engineering
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Since one or more emission, radiation, induction or a combination thereof unwanted energy reception in a radio communication system to produce a shadow
Sound, its performance as performance degradation, loss of information or misunderstanding, said the consequences if the existence of such unwanted energy, the result can be avoided.
4 sources of interference
Digital microwave radio relay station may be subject to radio interference are.
a) satellite communication systems transmit interference (including earth station and satellite launch);
b) with microwave, radar, radio, television and other radio transmission frequency, harmonics and spurious emission interference;
c) industrial, scientific and medical radio-frequency radiation interference device.
5 allows interference value
5.1 digital microwave relay systems with other business systems to share frequency interference when the permissible value
SDH microwave radio relay systems for each transmission channel group cluster group or groups over constant bit rate shared with other business systems with
A band, the inter-provincial trunk, trunk province, local access and microwave transmission Microwave transmission in any of these four basic channels for each direction of transmission
Ho month deterioration amount permissible interference from other services should not exceed 10% of the corresponding channel error performance indicators, from the fixed sector
The amount of traffic caused by the deterioration of partial interference should not exceed 89%, the amount of deterioration in other major businesses from common frequency caused should not exceed 10%
The amount of all other sources of interference from the deterioration caused by not more than 1%.
Note. The error performance indicators inter-provincial trunk, trunk province, local access and microwave transmission Microwave transmission channel based on the four basic YD/T 5088-
2005.
5.2 Interference from geostationary satellite communication systems allow value
Synchronous satellites operating in the same frequency band with its emission interference from the Earth's surface (including emission reflection satellite), digital microwave relay
The maximum interference power flux-density environment around the station, and under any conditions and modulation, shall not exceed the permissible values specified in Table 1.
Table 1 interference from geostationary satellite communication systems allow value
Band /
GHz
Reference bandwidth
The maximum interference power flux density /
dB (W/m2)
θ≤5 ° 5 ° < θ≤25 ° 25 ° < θ≤90 °
2.5 to 2.69 according to any one 4kHz -152 -152 + 0.75 × (θ-5) -137
3.4 to 4.2 either 4kHz -152 -152 + 0.5 × (θ-5) -142
4.5-4.8 any 4kHz -152 -152 + 0.5 × (θ-5) -142
6.825 ~ 7.705 either 4kHz -154 -154 + 0.5 × (θ-5) -144
8.025 to 8.5 either 4kHz -150 -150 + 0.5 × (θ-5) -140
12.2 ~ 12.75 any 4kHz -148 -148 + 0.5 × (θ-5) -138
17.7 ~ 19.7 either 1MHz -115 -115 + 0.5 × (θ-5) -105
31.0 ~ 31.3 either 1MHz -115 -115 + 0.5 × (θ-5) -105
37 to 38 according to any one 1MHz -125 -125+ (θ-5) -105
37.5 to 40 either 1MHz -127
5 ° < θ≤20 °
-127+ (4/3) × (θ-5)
20 ° < θ≤25 °
-107 + 0.4 × (θ-20)
-105
Note. θ is the angle of arrival above the horizon.
Interference from 5.3 MW, television broadcasting, shortwave broadcast allowable value
a) from medium wave and (interference emission 1-5) channel broadcasting in digital microwave radio relay station electric field intensity surrounding environment should not
Greater than 125dB (μV/m);
b) emission interference from shortwave broadcast, electric field strength in digital microwave radio relay station surroundings shall be no greater than 105dB (μV/m).
5.4 interference from industrial, scientific and medical radio-frequency equipment allowable value
Digital microwave radio relay station radiation interference surroundings, industrial, scientific and medical equipment in the 300MHz band interference signal in the following
Field strength shall comply with the provisions of GB 4824-2004. And digital microwave radio relay station in the same band, fall into digital microwave radio relay station receiver input
The end of the interfering signal power level should normally received signal power level is lower than the digital microwave relay station 30dB or more.
6 digital microwave radio relay station electromagnetic environment testing methods
Digital microwave radio relay station electromagnetic environment testing methods, see Appendix A.
7 front of the antenna Clearance Requirements
In front of digital microwave radio relay station antenna requires a certain open area (ie clear zone). Clearance requirements shown in Figure 1. In this range
There should be no forest, high trees, buildings, metal structures and other inner circle.
D --- antenna opening surface diameter in m (D≤4m);
λ --- operating wavelength, the unit is m;
F1 --- first Fresnel zone radius.
1 antenna front clearance zone
FIG F1 by the formula (1) to determine.
Where.
Note. digital microwave radio relay station other location requirements refer to Appendix E.
Appendix A
(Normative)
Digital microwave radio relay station electromagnetic environment testing methods
A. 1 testing purposes
Digital microwave radio relay station electromagnetic environment testing is to digital microwave radio relay station before the construction site, get to be selected at the radio station site
No. intensity, orientation and polarization, etc., as the decision to work at the sites to be selected in the existence of the digital microwave radio relay station
The impact of the radio signal reference.
A. 2 Test System
Composition test system (see Figure A.1).
a) adapted to digital microwave band metered spectrum analyzer;
b) digital microwave band directional antenna is suitable for testing;
c) adapted to digital microwave frequency band RF connection cable (feeder);
d) Option for testing digital microwave band (including low-noise amplifiers, attenuators, filters, etc.);
e) for a stable power supply test systems.
Figure A. 1 Test System
A. Basic requirements 3 Testing
a) shall be for the location of the digital microwave radio relay station antenna test antenna on principle; the test sensitivity of the device to meet the index requirement and leave a
Fixed margin to compensate for losses due to diffraction caused by the lack of height, the test may also be in the vicinity of the tall and relatively open sites
The top of the buildings;
b) All test equipment shall be calibrated and used within the approved and valid under normal operating conditions;
c) between the test antenna and good application properties testing equipment cables;
d) test options shall be adjusted according to need;
e) spectrum analyzer sensitivity indicators should meet or exceed Table A. 1 requirements.
Table A. 1 spectrum analyzer sensitivity index requirements
Frequency Range/GHz sensitivity/dBm
0.001 to 2.5 < -134
2 ~ 5.8 < -132
5.8 to 12.5 < -125
12.5 to 18.6 < -119
18.6 to 22 < -114
NOTE. Table A. 1 is a spectrum analyzer bandwidth of 10Hz when receiving sensitivity.
A. 4 Test Procedure
A. 4.1 Learn about the parameters to the station unit
Before digital microwave electromagnetic environment testing station unit to understand Proposed sites of location, frequency, signal bandwidth, transmit
Power, antenna parameters, modulation parameters, device parameters and permissible interference level indicators and other parameters. Ensure that the test system has sufficient sensitivity.
A. 4.2 Field Test
a) The proposed digital microwave radio relay station at the site, as shown in Figure A. 1 Connect test equipment;
b) measured by the GPS receiver latitude and longitude and altitude of the proposed earth station site to determine the magnetic north with a compass, according to the magnetic
North and true north angle deviation determining true north and true north as a reference 0 °;
c) boot, according to the instrument instruction manual preset meter function keys, adjust the feature set;
Sigint d) adjust the position and (or) elevation and polarization, according to a known position or comprehensive search test sites to be selected at the
Conditions, and record the maximum level value and the corresponding position signal.
A. 4.3 Test Data Processing
Test antenna aperture of the interference signal level value conversion formula as formula (A.1) as follows.
P'R = P'in-G '(φ) + Chou' - Chou "(A.1)
Where.
P'R --- test antenna aperture at the signal level in units of dBW;
P'in --- spectrum analyzer level value in units of dBW;
Directional gain G '(φ) --- test antenna can be calculated by reference to Appendix B, the unit is dBi;
Chou '--- RF connector cable attenuation (when using the optional test should include attenuation option), in units of dB;
Chou "--- a low noise amplifier gain in dB.
Note 1. When the input signal is low, especially when the input signal level and spectrum analyzer sensitivity insufficient balance 10dB, noise is superimposed on the Spectrum
Analyzer readings will have a non-negligible error. Therefore, during the test, when the test case of low SNR, the response readings corrected.
Note 2. The unit antenna aperture at the interference signal conversion method can refer to Appendix C.
Note 3. The relationship between the bit error rate and the related formulas and SNR refer to Appendix D.
Appendix B
(Informative)
The main interference level calculation formula
B. 1 digital microwave radio relay station antenna aperture maximum allowable interference level calculation formula
Converted to digital microwave radio relay station antenna aperture maximum permissible interfering signal level is calculated as formula (B.1) as follows.
PR = Pin + Chou -G (φ) (B.1)
Where.
PR --- digital microwave radio relay station antenna aperture maximum allowable interference signal level in units of dBW;
Pin --- digital microwave radio relay station at the receiver input maximum allowable interference signal level in units of dBW;
G (φ) --- digital microwave radio relay station receiving antenna directivity gain in the direction of interference, the unit is dBi;
Feeder system Chou --- digital microwave radio relay stations loss in dB.
B. 2 antenna gain calculated
When calculating digital microwave radio relay station receiving antenna gain in the interfering signal direction, should adopt measured antenna pattern, and other related resources
material. Without this information, then the parabolic antenna, you can use the formula (B.2) ~ (B.14) is calculated.
B. Ratio of 2.1 digital microwave radio relay station receiving antenna diameter and the operating wavelength of less than 100 when formula
G (φ) = Gmax-2.5 × 10-
3 D
· () Φ 0 ° ≤φ < φm (B.2)
G (φ) = G1 φm ≤φ < 100λ/D (B.3)
G (φ) = 52-10lg (D/λ) -25lgφ 100λ/D≤φ < 48 ° (B.4)
G (φ) = 10-10lg (D/λ) 48 ° ≤φ≤180 ° (B.5)
Where.
G (φ) --- digital microwave radio relay station receiving antenna gain of the signal in the direction of the interference, the unit is dBi;
D --- antenna diameter in m;
the deviation angle φ --- antenna main beam central axis, in degrees (°);
--- wavelength [lambda], in units of m;
G1 --- first side lobe gain, the unit is dBi.
The value G1 by equation (B.6) calculated.
G1 = 2 + 15lg (D/λ) (B.6)
The value φm by formula (B.7) calculated.
φm =
20λ
D Gmax-G Sang 1
(B.7)
B. Ratio of 2.2 digital microwave radio relay station receiving antenna diameter and the operating wavelength is not less than 100 when formula
G (φ) = Gmax-2.5 × 10-
3 D
· () Φ 0 ° ≤φ < φm (B.8)
G (φ) = G1 φm ≤φ < φr (B.9)
G (φ) = 32-25lgφ φr≤φ < 48 ° (B.10)
G (φ) = - 10 48 ° ≤φ≤180 ° (B.11)
Where.
G (φ) --- digital microwave radio relay station receiving antenna gain of the signal in the direction of the interference, the unit is dBi;
D --- antenna diameter in m;
--- wavelength [lambda], in units of m;
G1 --- first side lobe gain, the unit is dBi;
Gmax --- main lobe antenna gain maximum value, the unit is dBi.
The value G1 by equation (B.12) is calculated.
G1 = 2 + 15lgD/λ (B.12)
The value φm by formula (B.13) is calculated.
φm =
20λ
D Gmax-G Sang 1
(B.13)
The value φr by equation (B.14) is calculated.
φr = 15.85 (D/λ) -
0.6 (B.14)
Appendix C
(Informative)
Space antenna aperture at the interference in terms of signal power flux density
C. 1 power flux density signal level conversion
Some tests need to use spatial signal power flux density at the antenna aperture, between it and the signal level can be converted by the formula (C.1).
Pr = 10lg (P'R/Se) (C.1)
Where.
Pr --- aperture antenna at space interference signal power flux density in dB (W/m2);
P'R --- antenna aperture of the interference signal power, in W;
Se = λ
4π
, Where λ is the wavelength.
C. 2 in terms of the power flux density and field strength
The space between the power flux-density signal with field strength by the formula (C.2) conversion.
P = 20lgE-10lgZ (C.2)
Where.
P --- spatial signal power flux density in dB (W/m2);
E --- spatial signal electric field strength, in units of V/m;
Z --- impedance of free space, is 377Ω.
C. Conversions 3 spectrum analyzer readings and electric field intensity
Then use the spectrum analyzer to measure the field strength, the field strength readings relationship formula (C.3) as follows.
E '= P + A + F (C.3)
Where.
E '--- electric field strength, in units of dB (μV/m);
P --- spectrum analyzer readings in dBm;
A --- antenna factor, dB (1/m);
F --- conversion coefficient, dB. When the spectrum analyzer input impedance of 50Ω, F = 107dB.
Appendix D
(Informative)
Relationship between BER and SNR
D. Relationship 1 MPSK modulation system BER and SNR
When M = 2, the
Pe≈2Q 2EbN Sang () 0 (coherent demodulation DPSK) (D.1)
Pe≈0.5exp (-Eb/N0) (non-coherent demodulation of DPSK) (D.2)
Pe≈Q 2EbN Sang () 0 (BPSK) (D.3)
When M > 2,
Pe≈2Q [2 (C/N) Sang 0sin (π/M)] (D.4)
log2 (MEb/N0) = (C/N) 0 (D.5)
Where.
Expression Q function is. Q (z) = ∫
2 Sang π
x0 e-
2/2d x0 (D.6)
M --- phasing number of phases;
Eb/N0 --- energy ratio signal bit to noise power spectral density;
(C/N) 0 --- corresponds to the theoretical value of the SNR in a bit error rate (such as 10-3 or 10-6), in units of dB.
D. 2 relationship MQAM modulation system BER and SNR
Pe = 2PL 1-12P () L (D.7)
PL ≈2
(L-1)
LQ
Sang M- 1 (C/N) () 0 (D.8)
Where.
PL --- MQAM modulation system is one of the two quadrature components of the baseband signal error rate;
L = Sang M.
Theory can be drawn from the above formula (C/N) 0.
Appendix E
(Informative)
Digital microwave radio relay station siting requirements
Digital microwave radio relay station site should meet the following requirements.
a) sites should be selected in easily accessible, reliable supply of places;
b) sites should avoid the often large vibration or noise of a strong place;
c) sites should be selected soil evenly, no collapse, landslide and dangerous rock in the lot;
d) sites should not be selected for distributing more dust and corrosive gases, corrosive emissions from nearby industrial enterprises in the production process;
e) sites should not be selected in the flammable and explosive material warehouses and airports as well as in the production process prone to fire, explosion
Nearby industrial enterprises;
f) sites should not be selected in the mining areas and areas liable to floods the flooded areas.
references
[1] GB/T 3383 telecommunications transmission decibels.
[2] GB/T 6113.104 radio disturbance and immunity measuring apparatus and methods - Part 1-4. Radio disturbance
And immunity measuring apparatus - Ancillary equipment - Radiated disturbances (GB/T 6113.104-2008, CISPR16-1-4.2005, IDT).
[3] GB/T 7615-1987 master antenna television system antenna portion.
[4] GB/T 13619 digital microwave relay systems interference calculation methods.
[5] GB 50016-2006 architectural design code for fire protection.
[6] ITU "RR" 2004 edition.
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