Summary of Contents for ARIB 8495B
- Page 1 ARIB STD-T91 ENGLISH TRANSLATION UWB (ULTRA-WIDEBAND) RADIO SYSTEMS ARIB STANDARD ARIB STD-T91 Ver. 1.0 Established on December 12 , 2006 Association of Radio Industries and Businesses (ARIB)
- Page 2 The ARIB Standards and ARIB Technical Reports are usually written in Japanese and approved by the ARIB Standard Assembly. This document is a translation into English of the approved document for the purpose of convenience of users. If there are any discrepancies in the content, expressions, etc., between the Japanese original and...
- Page 3 Association of Radio Industries and Businesses (ARIB) defines basic technical requirements for standard specifications of radio equipment, etc. as an “ARIB STANDARD” in the field of various radio systems. In conjunction with national technical standards which are intended for effective spectrum...
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Page 5: Table Of Contents
ARIB STD-T91 Contents Introduction Chapter 1 General Descriptions ......................1 1.1 Outline ........................... 1 1.2 Scope of the Standard ......................1 1.3 Reference regulations ......................1 Chapter 2 Standard System ......................3 2.1 System Overview........................3 2.2 System Configurations......................3 Chapter 3 Technical Requirements for Radio Equipment .............. -
Page 7: Chapter 1 General Descriptions
ARIB STD-T91 Chapter 1 General Descriptions 1.1 Outline The standard defines requirements of the radio equipment of ultra-wideband radio stations stipulated in item 2 of paragraph 2, Article 4.4 of Regulations for Enforcement of Radio Law (This refers to the radio stations that mainly handle data transmissions with the required frequency bandwidth of 450 MHz or more and uses 0.001 W or less for the antenna input power... - Page 8 ARIB STD-T91 Technical Conditions Compliance Approval etc. for Terminal Equipment, “NT” refers to a Notification of the Ministry of Posts and Telecommunications if issued in 2000 or earlier, and a Notification of the Ministry of Internal Affairs and Communications (MIC) if issued in 2001 or...
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Page 9: Chapter 2 Standard System
ARIB STD-T91 Chapter 2 Standard System 2.1 System Overview UWB Radio System is a radio system that spreads electric power over a very wide bandwidth. On the other hand, the standard does not specify a protocol layer. 2.2 System Configurations... - Page 10 ARIB STD-T91 (2) The case of radio equipment not connected to the AC mains power supply which transmits signals to another radio equipment connected to the AC mains power supply: If a radio equipment is not connected to the AC mains power supply, it can emit radio waves only after it detects a signal from another radio equipment which is connected to the AC mains power supply.
- Page 11 ARIB STD-T91 (3) The case of radio equipment not connected to the AC mains power supply which transmits signals to another radio equipment not connected to the AC mains power supply: If a radio equipment is not connected to the AC mains power supply and transmits...
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Page 12: Chapter 3 Technical Requirements For Radio Equipment
ARIB STD-T91 Chapter 3 Technical Requirements for Radio Equipment 3.1 General Conditions (1) Contents of communications (RERL, Article 4.4) Content of communication shall primarily be for data transmissions. (2) Communication methods (ORE, Article 49.27) Communication methods shall be either simplex operation, full duplex operation or half duplex operation. - Page 13 ARIB STD-T91 Peak power per 50MHz bandwidth shall be 0 dBm or less. As an interim measure until December 31, 2008, the following condition shall apply: Of radio equipment with use of frequency from 3.4 GHz to 4.8 GHz, those without an interference mitigation function stipulated in 3.4 (2) shall have...
- Page 14 ARIB STD-T91 Frequency band Permissible values for unwanted emission intensity Average power per 1 MHz Peak power per 1 MHz bandwidth bandwidth Less than 1,600 MHz -90 dBm or less -84 dBm or less From 1,600 MHz to 2,700 MHz...
- Page 15 ARIB STD-T91 Permissible values for unwanted emission intensity Provision by average power Provision by peak power Antenna power density Frequency [GHz] 1) With an interference mitigation function Permissible values for unwanted emission intensity Provision by average power Provision by peak power...
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Page 16: Receiver
ARIB STD-T91 Permissible values for unwanted emission intensity Provision by average power Antenna power density Provision by peak power Frequency [GHz] Figure 3-2 Permissible values for unwanted emission intensity (when using frequency from 7.25 GHz to 10.25 GHz) 3.3 Receiver (1) Limit on Secondary Radiated Emissions, etc. - Page 17 ARIB STD-T91 Antenna power density Frequency [GHz] 1) With an interference mitigation function Antenna power density Frequency [GHz] 2) Without an interference mitigation function (until December 31, 2008) Figure 3-3 Limit on Secondary Radiated Emissions (when using frequency from 3.4 GHz to 4.8 GHz)
- Page 18 ARIB STD-T91 Antenna power density Frequency [GHz] Figure 3-4 Limit on Secondary Radiated Emissions (when using frequency from 7.25 GHz to 10.25 GHz) As an interim measure until December 31, 2008, the following conditions shall apply: For radio equipment using radio with frequency from 3.4 GHz to 4.8 GHz, those without an interference mitigation function stipulated in 3.4 (2) shall have the limit on...
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Page 19: Controller
ARIB STD-T91 3.4 Controller A controller shall have the following devices and functions, and meet each of the following conditions. (1) Interference prevention function (RERL, Article 6.2 / ORE Article, 9.4) The radio equipment of the radio station shall mainly be used in the same premises. It shall automatically transmit identification signs or receive them. -
Page 20: Antenna
ARIB STD-T91 disconnect the channel when the communication quality is degraded, the judgment may be replaced by checking the operating condition of the channel. 3.6 Antenna (1) Antenna structures There is no specific provision for the antenna structure. (2) Gain of the transmitting antenna (ORE, Article 49.27) Absolute gain of the transmitting antenna shall be 0 dBi or less. -
Page 21: Chapter 4 Measurement Methods
ARIB STD-T91 Chapter 4 Measurement Methods Measurement methods shall be in accordance with TELEC-T406 (“Characteristics Test Methods for Radio Equipment Used for Radio Station of Ultra-Wideband Radio System”) issued by Telecom Engineering Center (TELEC) Foundation commissioned by the paragraph 2 of MIC Ordinance No. - Page 22 ARIB STD-T91 -16-...
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Page 23: Radio Equipment
Specified Radio Equipment (OTRCC, Appendix 1) Test items in relation to the technical regulation conformity certification for radio equipment of radio stations of UWB (Ultra-Wideband) radio system are as follows: See ARIB STD-T91 Chapter 4 for details. (1) Transmitter Frequency Occupied bandwidth... -
Page 24: Annex 2 Operational Guidelines For Uwb Radio Systems
ARIB STD-T91 Annex 2 Operational Guidelines for UWB Radio Systems 1 Summary 1.1 Objectives The Operational Guidelines are aimed at avoiding harmful radio interference to other radio equipment, and ensuring users’ convenience as well as achieving effective spectrum utilization, for operating UWB (Ultra-wideband) radio systems. - Page 25 ARIB STD-T91 The frequency band used for the UWB radio function is also used for radio equipment of other radio systems. 1. The use of equipment with UWB radio function shall be limited to indoors, i.e. within environments such as houses, apartments, buildings, etc.
- Page 26 ARIB STD-T91 UWB : Do not use outdoors Do not use UWB radio function outdoors Notes: 1) Show that the equipment is UWB radio equipment. 2) Show that the equipment shall only be used indoors. 3) Show that the equipment is UWB radio equipment, and that UWB radio function shall only be used indoors .
- Page 27 ARIB STD-T91 request by the user. Vendors should voluntarily execute a preliminary survey even if such a request is not issued. 4 Cooperation 4.1 Cooperation for interference avoidance In the case that harmful radio interference is caused to radio equipment other than UWB...
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Page 28: Annex 3 Design Guidelines For Uwb Radio Equipment
Table A3-1.In case permissible values for unwanted emission intensity of the frequency band are not shown in Table A3-1, then ARIB STD-T91 shall apply. Table A3-1 Permissible values for unwanted emission intensity for protecting broadcast receiver... - Page 29 ARIB STD-T91 The design guideline is subject to change depending on the VHF and UHF bands usage scenarios for the future planned termination of terrestrial analog broadcasting on July 24, 2011. 1.2 Indirect Measurement Method for Unwanted Emission Intensity 1.2.1 Use of an indirect measurement method for unwanted emission intensity The permissible values for unwanted emission intensity shown in Table A3-1 are at the measuring limit comparable with thermal noise at an ordinary temperature.
- Page 30 ARIB STD-T91 UWB Radio Spectrum Equipment Analyzer Figure A3-1 A measurement schematic diagram used for the measurement example (2) Equipment for an experiment A list of equipment used for the measurement experiment is shown in Table A3-2: Table A3-2 Equipment for experiment...
- Page 31 ARIB STD-T91 LPF input signal (AMP output signal) -(AMP gain) +(LPF insertion loss) Figure A3-2 Transmission characteristics of signals when combining LPF and AMP (A display example from a spectrum analyzer) (4) Characteristics of AMP Gain and noise figure (NF) of AMP at 600 MHz in the measurement example are shown in Table A3-3.
- Page 32 ARIB STD-T91 Table A3-4 Measurement parameters of a spectrum analyzer Item Set value Resolution bandwidth (RBW) 1 MHz Video bandwidth(VBW) Auto Sweep time (SWP) Attenuation (ATT) 0 dB Data points (Point) 1001 Detection (Detect) Average count(Average) Frequency span(SPAN) 10 MHz...
- Page 33 ARIB STD-T91 From Equation (1) and (2), can be obtained by making as in the Equation (3). ⎧ ⎫ ⎛ ⎞ α − − ⎜ ⎟ ⎨ ⎬ ⎝ ⎠ ⎩ ⎭ As shown in the Equation (3), can be calculated when AMP gain (G) and noise figure (F) are obtained.
- Page 34 ARIB STD-T91 omitted in the Figure A3-3. transmitter Filter Figure A3-3 A configuration of UWB radio equipment using a filter The following descriptions are a design example of indirect measurements of unwanted emission intensity of UWB radio equipment, based on the Figure A3-3.
- Page 35 ARIB STD-T91 (3) Measurement of characteristics of an antenna Connect a signal source and a measured antenna as well as a measurement device and a standard antenna as shown in Figure A3-6 in an environment such as a radio anechoic chamber, and measure the absolute gain of the antenna.
- Page 37 (Please describe your proposal or present your questions or comments in concrete terms.) Sections to be completed by secretariat (Response) Date of receipt － Ref. No. Classification: Remarks Please send your ARIB Standard-related question in this format. If you complete this form in English, please provide Japanese translation alongside the English.
- Page 39 UWB (Ultra-wideband) Radio Systems ARIB STANDARD ARIB STD-T91 VERSION 1.0 Version 1.0 December 2006 Published by Association of Radio Industries and Businesses Nittochi Bldg. 11F 1-4-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-0013, Japan TEL 81-3-5510-8590 FAX 81-3-3592-1103 All rights reserved...
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