1、 International Telecommunication Union ITU-T G.9901TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2014) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Access networks In premises networks Narrowband orthogonal frequency division multiplexing power line communication tran
2、sceivers Power spectral density specification Recommendation ITU-T G.9901 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEM
3、S G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND L
4、INE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.199
5、9 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 Metallic access networks G.9700G.9799 Optical line systems for local and access networks G.9800G.9899 In premises networks G.9900
6、G.9999For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.9901 (04/2014) i Recommendation ITU-T G.9901 Narrowband orthogonal frequency division multiplexing power line communication transceivers Power spectral density specification Summary Recommendation ITU-T G.9901
7、 specifies the control parameters that determine spectral content, power spectral density (PSD) mask requirements, a set of tools to support the reduction of the transmit PSD, the means to measure this PSD for transmission over power line wiring, as well as the allowable total transmit power into a
8、specified termination impedance. It complements the system architecture, physical layer (PHY) and data link layer (DLL) specifications in Recommendations ITU-T G.9902 (G.hnem), ITU-T G.9903 (G3-PLC) and ITU-T G.9904 (PRIME). This Recommendation uses material from Recommendation ITU-T G.9955 includin
9、g Amendment 1; specifically material from the main body of the text, and Annexes A, B and E. This edition integrates material from the 2012 version of this Recommendation with its corresponding Amendment 1, plus the following additional modifications: removal of optional FCC-1.a and FCC-1.b bandplan
10、s in Annex B. clarifications on the use of frequency notching in Annex B. History Edition Recommendation Approval Study Group Unique ID*1.0 ITU-T G.9901 2012-11-20 15 11.1002/1000/11827 1.1 ITU-T G.9901 (2012) Amd. 1 2013-07-12 15 11.1002/1000/11895 2.0 ITU-T G.9901 2014-04-04 15 11.1002/1000/12089
11、_ *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.9901 (04/2014) FOREWORD The International Telecommunication Union (ITU) is
12、 the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing
13、Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics.
14、 The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Ad
15、ministration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and
16、 compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommenda
17、tion is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of clai
18、med Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommenda
19、tion. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2014 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, with
20、out the prior written permission of ITU. Rec. ITU-T G.9901 (04/2014) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 PSD related specifications relating to
21、 CENELEC bands (9-148.5 kHz) 2 Annex A PSD specifications for G.hnem transceivers . 3 A.1 Frequency band specifications . 3 A.2 Transmit PSD mask 5 A.3 Electric specification 6 Annex B PSD specifications for G3-PLC transceivers . 8 B.1 CENELEC band specifications 8 B.2 FCC band specifications . 8 B.
22、3 PSD mask specifications (notching) . 9 Annex C PSD specifications for PRIME transceivers 12 C.1 Introduction 12 C.2 PHY parameters 12 C.3 Preamble parameters 13 C.4 Electrical specification of the transmitter . 13 Rec. ITU-T G.9901 (04/2014) 1 Recommendation ITU-T G.9901 Narrowband orthogonal freq
23、uency division multiplexing power line communication transceivers Power spectral density specification 1 Scope This Recommendation specifies the control parameters that determine spectral content, power spectral density (PSD) mask requirements, a set of tools to support the reduction of the transmit
24、 PSD, the means to measure this PSD for the transmission over power line wiring, as well as the allowable total transmit power into a specified termination impedance. It complements the system architecture, physical layer (PHY), and data link layer (DLL) specifications in Recommendations ITU-T G.990
25、2 (G.hnem), ITU-T G.9903 (G3-PLC) and ITU-T G.9904 (PRIME). 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All
26、 Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is reg
27、ularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.9902 Recommendation ITU-T G.9902 (2012), Narrowband orthogonal frequency division multiplexing power line communication transceivers for ITU-T
28、 G.hnem networks. ITU-T G.9903 Recommendation ITU-T G.9903 (2014), Narrowband orthogonal frequency division multiplexing power line communication transceivers for G3-PLC networks. ITU-T G.9904 Recommendation ITU-T G.9904 (2012), Narrowband orthogonal frequency division multiplexing power line commun
29、ication transceivers for PRIME networks. IEC 60050-161 IEC 60050-161 (1990), International Electrotechnical Vocabulary, Chapter 161: Electromagnetic compatibility. IEC 61334-5-1 IEC 61334-5-1 (2001), Distribution automation using distribution line carrier systems Part 5-1: Lower layer profiles The s
30、pread frequency shift keying (S-FSK) profile. CISPR 16-1 IEC CISPR 16-1 (1993), Specification for radio disturbance and immunity measuring apparatus and methods. Part 1: Radio disturbance and immunity measuring apparatus. CISPR 16-2 IEC CISPR 16-2 (1996), Specification for radio disturbance and immu
31、nity measuring apparatus and methods. Part 2: Methods of measurement of disturbances and immunity. EN50065-1 CENELEC EN 50065-1 (2011), Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 1: General requirements, frequency bands and electromagnetic distu
32、rbances. 2 Rec. ITU-T G.9901 (04/2014) ARIB STD-T84 ARIB STD-T84 Ver. 1.0 (2002), Power Line Communication Equipment (10 kHz-450 kHz). 3 Definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following term: 3.2.1 bandplan: A specific r
33、ange of the frequency spectrum where an NB-PLC device is operating. A bandplan is defined by a lower frequency and an upper frequency. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AMN Artificial Mains Network LISN Line Impedance Stabilization Networ
34、k LPM Limit PSD Mask NB-PLC Narrowband-Power Line Communications OFDM Orthogonal Frequency Division Multiplexing PHY Physical layer PLC Power Line Communications PMSC Permanently Masked Subcarriers PSD Power Spectral Density TN Termination Network 5 Conventions None. 6 PSD related specifications rel
35、ating to CENELEC bands (9-148.5 kHz) Clauses 6, 7, 8 and 9 of EN50065-1 shall apply. Rec. ITU-T G.9901 (04/2014) 3 Annex A PSD specifications for G.hnem transceivers (This annex forms an integral part of this Recommendation.) NOTE This annex includes the power spectral density (PSD) specifications r
36、elating to ITU-T G.9902. A.1 Frequency band specifications For compliance with this Recommendation it is mandatory to support at least one of the CENELEC bandplans or at least one of the FCC bandplans. A.1.1 CENELEC band When operating in the CENELEC band (3-148.5 kHz), a node shall use the control
37、parameters specified in Table A.1 (see clause 8.4.7 of ITU-T G.9902). Table A.1 OFDM modulator control parameters for the CENELEC band Notation Value N 128 FSC1.5625 kHzNGI-PL12 1, 2 bit mapping 24 3, 4 bit mapping NGI-HD0 NGI-CES 8 FUS64 FSCThe CENELEC band is divided into sub-bands, forming bandpl
38、ans A, B and CD described in the following subclauses. A.1.1.1 CENELEC-A bandplan Parameters for CENELEC-A bandplan are defined in Table A.2. Table A.2 Parameters for CENELEC-A bandplan Notation Value Note FSTART35.9375 kHz Lowest frequency of CENELEC-A bandplan (subcarrier number 23) FEND90.625 kHz
39、 Highest frequency of CENELEC-A bandplan (subcarrier number 58) PMSC indices 0 to 22, 59 to 127 Clause 8.4.2.1 of ITU-T G.9902 A.1.1.2 CENELEC-B bandplan Parameters for CENELEC-B bandplan are defined in Table A.3. 4 Rec. ITU-T G.9901 (04/2014) Table A.3 Parameters for CENELEC-B bandplan Notation Val
40、ue Note FSTART98.4375 kHz Lowest frequency of CENELEC-B bandplan (subcarrier number 63) FEND120.3125 kHz Highest frequency of CENELEC-B bandplan (subcarrier number 77) PMSC indices 0 to 62, 78 to 127 Clause 8.4.2.1 of ITU-T G.9902 A.1.1.3 CENELEC-CD bandplan Parameters for CENELEC-CD bandplan are de
41、fined in Table A.4. Table A.4 Parameters for CENELEC-CD bandplan Notation Value Note FSTART125 kHz Lowest frequency of CENELEC-CD bandplan (subcarrier number 80) FEND143.75 kHz Highest frequency of CENELEC-CD bandplan (subcarrier number 92) PMSC indices 0 to 79, 93 to 127 Clause 8.4.2.1 of ITU-T G.9
42、902 A.1.2 FCC bandplans When operating in the FCC band (9-490 kHz), a node shall use the control parameters specified in Table A.5 (see clause 8.4.7 of ITU-T G.9902). Table A.5 OFDM modulator control parameters for the FCC band Notation Value N 256 FSC3.125 kHz NGI24 1, 2 bit mapping 48 3, 4 bit map
43、ping NGI-HD0 NGI-CES 16 FUS128 FSCBandplans FCC, FCC-1 and FCC-2 defined over the FCC band are described in the following subclauses. Additional bandplans over the FCC band are for further study. Rec. ITU-T G.9901 (04/2014) 5 A.1.2.1 FCC bandplan Parameters for the FCC bandplan are defined in Table
44、A.6. Table A.6 Parameters for FCC bandplan Notation Value Note FSTART34.375 kHz Lowest frequency of FCC bandplan (subcarrier number 11) FEND478.125 kHz Highest frequency of FCC bandplan (subcarrier number 153) PMSC indices 0 to 10, 154 to 255 Clause 8.4.2.1 of ITU-T G.9902 A.1.2.2 FCC-1 bandplan Par
45、ameters for FCC-1 bandplan are defined in Table A.7. Table A.7 Parameters for FCC-1 bandplan Notation Value Note FSTART34.375 kHz Lowest frequency of FCC bandplan (subcarrier number 11) FEND137.5 kHz Highest frequency of FCC bandplan (subcarrier number 44) PMSC indices 0 to 10, 45 to 255 Clause 8.4.
46、2.1 of ITU-T G.9902 A.1.2.3 FCC-2 bandplan Parameters for FCC-2 bandplan are defined in Table A.8. Table A.8 Parameters for FCC-2 bandplan Notation Value Note FSTART150 kHz Lowest frequency of FCC bandplan (subcarrier number 48) FEND478.125 kHz Highest frequency of FCC bandplan (subcarrier number 15
47、3) PMSC indices 0 to 47, 154 to 255 Clause 8.4.2.1 of ITU-T G.9902 A.1.3 ARIB bandplan The ARIB bandplan shall follow the requirements set out in section 3.4 of ARIB STD-T84. When operating in the ARIB bandplan, a node shall use the parameters specified in clause A.1.2 with the following modificatio
48、n: tones 134-153 are defined as PMSC (see clause 8.4.2.1 of ITU-T G.9902 for the definition of PMSC tones). A.2 Transmit PSD mask A.2.1 Frequency notching ITU-T G.9902 supports frequency notching for regulatory and coexistence purposes. Notching shall apply to all components of a PHY frame (preamble
49、, PFH, CES, and payload) and to all PHY frames transmitted in the domain. 6 Rec. ITU-T G.9901 (04/2014) If frequency notching is implemented by masking subcarriers, masked subcarriers shall be determined using the following rules: A frequency region between any two consecutive subcarriers (FSC) is divided into 4 equally-spaced sections, which are further grouped into two equal regions: R1 that is around each subcar
