1、The Teleconmiunications Industry Association represents the conmiunications sector of NOTICE TIAIEIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improv
2、ement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TIAIEIA from manufacturing or selling products not confor
3、ming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TIAIEIA members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by TIAIEIA in accord
4、ance with the American National Standards Institute (ANSI) patent policy. By such action, TIAIEIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. TIA STANDARDS TIA Standards contain information deemed to b
5、e of technical value to the industry, and are published at the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the development of a TIAIEIA Standard. TIA Standards should be reviewed on an annual b
6、asis by the formulating Committee and a decision made on whether to proceed to develop a TIAIEIA Standard on this subject. TIA Standards must be cancelled by the Committee and removed from the TIAIEIA Standards Catalog before the end of their third year of existence. Publication of this TIA Standard
7、 for trial use and comment has been approved by the Telecommunications Industry Association. Distribution of this TIA Standard for comment shall not continue beyond 60 months from the date of publication. It is expected that following this 36 month period, this TIA Standard, revised as necessary, wi
8、ll be submitted to the American National Standards Institute for approval as an American National Standard. Suggestions for revision should be directed to: Standards for systems where more than one earth station is expected to transmit simultaneously in the same bandwidth, e.g., CDMA systems, N is t
9、he likely maximum number of simultaneously transmitting cofrequency earth stations in the receive beam of the satellite; N=l for TDMA and FDMA systems. The values given in 1) and 2) may be exceeded by 3 dB for values of -lo“, provided that the total angular range over which this occurs does not exce
10、ed 20“ when measured along both sides of the GSO arc. GSO/FSS earth station antenna off-axis EIW spectral density for cross-polarized signals shall not exceed the values given in Table 3.1.2-3 in all directions, relative to the GSO arc, under clear sky conditions. 13 Earth Terminal Requirements TIA-
11、904 Spectral Density 8.5-2510g(8) - 1 Olg(N) -12.63-1 Olg(N) 1 Units Off-Axis Angle dBW/40 kHz for 2.0“ I 8 I 7“ dBW/40 kHz for 7“ 8 I 9.23“ 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 where 8 is the angle in degrees from the axis of the main lobe; f
12、or systems where more than one earth station is expected to transmit simultaneously in the same bandwidth, e.g., CDMA systems, N is the likely maximum number of simultaneously transmitting cofrequency earth stations in the receive beam of the satellite; N=l for TDMA and FDMA systems. 5) For earth st
13、ations employing uplink power control, the values in i), 2), and 4) may be exceeded by up to 20 dB under conditions of uplink fading due to precipitation. The amount of such increase in excess of the amount of monitored excess attenuation over clear sky propagation conditions shall not exceed 1.5 dB
14、 or 15% of the actual amount of monitored excess attenuation in dB, whichever is larger, with a confidence level of 90 %, except over transient periods accounting for no more than 0.5% of the time during which the excess is no more that 4.0 dB. 3.2 Limitations on Earth Terminal Harmonics and Spuriou
15、s Emissions (Applicable Reference: 4) 3.2.1 Earth Terminal Off-Axis SDurious Radiation The specification of this parameter covers all kinds of unwanted emission in the frequency range, from 30 MHz to 40 GHz, emitted by terminals operating in the 28.35-28.6 GHz and 29.5-30.0 GHz frequency bands. All
16、directions are considered except for a cone around the transmit axis with an opening of 7“. The purpose of this specification is to limit interference into other services, e.g., fixed links but also satellite services. 14 TIA-904 Frequency range MHz 30 MHz to 230 MHz 8 9 Quasi-peak limits d BpV/m 30
17、 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 The following specifications apply to earth terminals transmitting at EIRP values up to and including EIRPmax: 1) The earth terminal shall not exceed the limits for radiated interference field strength over the frequency range from 30 MHz to 100
18、0 MHz, as specified in Table 3.2.1- 1. 1230 MHz to 1 O00 MHzI 37 The lower limits shall apply at the transition frequency. 2) When the earth terminal is in the Transmission Disabled state, the off-axis spurious radiation from the earth terminal, in any 100 kHz band, shall not exceed the limits in Ta
19、ble 3.2.1-2, for all off-axis angles greater than 7“. Table 3.2.1-2. Limits of Spurious Radiation - Transmission Disabled State 2.0 GHz-10.7 GHz 21.2 GHz-40 GHz The lower limits shall apply at the transition frequency 3) This specification applies outside the nominated bandwidth for earth terminals
20、transmitting in the 29.5-30.0 GHz band. For both the Carrier-On and Carrier-Off states, the off-axis spurious radiation in any 100 kHz band from the earth terminal, shall not exceed the limits shown in Table 3.2.1-3, for all off-axis angles greater than 7“. 15 Earth Terminal Requirements TIA-904 1 T
21、able 3.2.1-3. Limits of Spurious Radiation, 29.5-30.0 GHz Transmit Band Frequency band 1.0 GHz to 2.0 GHz 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 EIRP limit (dBpW) 43 2.0 GHz to 3.4 GHz 3.4 GHz to 10.7 GHz 49 55 10.7 GHz to 21.2 GHz 21.2 GHz to 29.350 GHz 61 67 The lowe
22、r limits shall apply at the transition frequency. 29.35 GHz to 29.5 GHz 30.00 GHz to 30.15 GHz 30.15 GHz to 40 GHz In the 21.2 GHz-29.35 GHz frequency band, for any 20 MHz band within which one or more spurious signals exceeding 67 dBpW are present, the power of each of those signals exceeding the l
23、imit shall be added in watts, and the sum shall not exceed 75 dBpW. 75 (note 1) 75 (note 1) 67 In the frequency bands of 29.35 GHz-29.5 GHz and 30.0 GHz- 30.15 GHz, for any 20 MHz band within which one or more spurious signals exceeding 75 dBpW are present, the power of each of those signals exceedi
24、ng the limit shall be added in watts, and the sum shall not exceed 78 dBpW. For earth terminals designed to transmit several different carriers (multicarrier operation) simultaneously, the limits given in Table 3.2.1-3 apply to each individual carrier when transmitted alone. 4) This specification ap
25、plies outside the nominated bandwidth for earth terminals transmitting in the 28.35-28.6 GHz band. For both the “Carrier-On” and “Carrier-Off states, the off-axis spurious radiation in any 100 kHz band from the earth terminal shall not exceed the limits in Table 3.2.1-4 for all off-axis angles great
26、er than 7”. 16 TIA-904 1 Table 3.2.1-4. Limits of Spurious Radiation, Transmit Band 28.35-28.6 GHz Freauencv band 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 EIRP limit (dBDW) 1.0 GHz to 2.0 GHz 2.0 GHz to 3.4 GHz 43 49 3.4 GHz to 10.7 GHz 10.7 GHz to 20.0 GHz 20.0 GHz to 28.2 GHz 55 6
27、1 67 28.2 GHz to 28.35 GHz 28.6 GHz to 28.75 GHz The lower limits shall apply at the transition frequency. 75 (note 1) 75 (note 1) In the 20.0 GHz-28.2 GHz frequency band, for any 20 MHz band within which one or more spurious signals exceeding 67 dBpW are present, the power of each of those signals
28、exceeding the limit shall be added in watts, and the sum shall not exceed 75 dBpW. 28.75 GHz to 40 GHz In the 28.2 GHz-28.35 GHz and 28.6 GHz-28.75 GHz frequency bands, for any 20 MHz band within which one or more spurious signals exceeding 75 dBpW are present, the power of each of those signals exc
29、eeding the limit shall be added in watts, and the sum shall not exceed 78 dBpW. 67 For earth terminals designed to transmit several different carriers (multicarrier operation) simultaneously, the above limits apply to each individual carrier when transmitted alone. 5) These limits are applicable to
30、the complete earth terminal equipment, which comprises the indoor and outdoor units with at least 1 O meters of cable connecting them. 17 Earth Terminal Requirements TIA-904 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 3.2.2
31、Earth Terminal On-Axis Spurious Radiation 3.2.2.1 Car ri er-On State The following specification applies to the earth terminal transmitting at EIRP values UP to EIRPnom. For EIRPs above EIRPnom (when uplink power control is implemented), the following limits may be exceeded by the difference in dB b
32、etween the current EIRP and EIRPnom. In the 28.35-28.6 and 29.5 GHz-30.0 GHz bands, the EIRP spectral density of the spurious radiation outside the nominated bandwidth shall not exceed 4-10 log M dBW in any 100 kHz band. Note 1 : In order to avoid harmful interference to radio services using the sam
33、e satellite or collocated satellites, the satellite operator or the satellite network operator may require more stringent limits, e.g., depending on the size of the network and the size of the satellite coverage. In a bandwidth of 5 times the necessary bandwidth centered on the carrier center freque
34、ncy, the EIRP spectral density of the spurious radiation outside the nominated bandwidth shall not exceed 18-10 log M dBW in any 100 kHz band. M is the maximum number of earth terminals that are expected to transmit simultaneously in the same carrier frequency band. This number shall not be exceeded
35、 for more than 0.01 % of the time. The value of M and the operational conditions of the system shall be declared by the manufacturer. Note 2: Note 3: The on-axis spurious radiation outside the 28.35 GHz-28.6 GHz and 29.5 GHz-30.0 GHz bands is indirectly limited by subclause 3.2.1. Consequently no sp
36、ecification is needed. Intermodulation limits inside the bands 28.35 GHz-28.6 GHz and 29.5 GHz-30.0 GHz are to be determined by system design and are subject to satellite operator specifications. For earth terminals designed to transmit several different carriers (multicarrier operation) simultaneou
37、sly, the previously mentioned limits only apply to each individual carrier when transmitted alone. 18 TIA-904 i 3.2.2.2 Carrier-Off and Transmission Disabled State 2 3 4 5 6 7 8 9 10 11 In the 29.5 GHz-30.0 GHz band, the EIRP spectral density of the spurious radiation outside the nominated bandwidth
38、 shall not exceed -2 1 dBW in any 100 kHz band. Note 4: In order to avoid harmful interference to radio services using the same satellite or collocated satellites, the satellite operator or the satellite network operator may require more stringent limits, e.g., depending on the size of the network a
39、nd the size of the satellite coverage. 19 Earth Terminal Requirements TIA-904 1 4 SPACE STATION REQUIREMENTS This section provides the limitations on the two primary emissions from a space station that cause interference on terrestrial systems: 0 In-band flux density 0 Out-of-band emissions io 4.1 S
40、pace Station In-band Power Flux 11 Density (PFD) (Applicable Reference: I) 12 13 14 15 16 17 PFD at the Earths surface, which is produced by emissions from a space station for all conditions, including clear sky, and for all methods of modulation, shall not exceed a level of -118 dBW/m2/MHz in the b
41、ands 18.58-18.8 GHz and 19.7-20.2 GHz. 18 4 19 Em i ssi on s (Ap p I i ca b le Reference: 151) 2 Space Station Out-of-Band (OOB) 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 The OOB domain emissions of a station operating in the bands allocated to the FSS should be attenuated below the maximum po
42、wer spectral density, in a reference bandwidth of 1 MHz within the necessary bandwidth, by the following equation: where F is the frequency offset from the edge of the total assigned band, expressed as a percentage of necessary bandwidth. It is noted that OOB emission domain starts at the edges of t
43、he total assigned band. The out-of-band mask rolls off the spurious boundary or the point where it is equal to the ITU-R Radio Regulations appendix S3 spurious limit, whichever comes first. The spurious attenuation for space services is 19 + 10 log P or 36 dBc in a reference bandwidth of 1 MHz, whichever is less attenuation. 20
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