ARIB STD-T91
Introduction
With participation of radio communication equipment manufacturers, broadcasting
equipment manufacturers, telecommunication operators, broadcasters and general equipment
users, 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
utilization and avoidance of interference with other spectrum users, an ARIB STANDARD is
intended as a standard for use by the private sector by compiling various voluntary standards
regarding the adequate quality of radio and broadcasting service, compatibility issues, etc. It
aims to enhance convenience for radio equipment manufacturers, telecommunication operators,
broadcasting equipment manufacturers, broadcasters and general users.
An ARIB STANDARD herein is published as “UWB (Ultra-Wideband) Radio Systems”. In
order to ensure fairness and transparency in the defining stage, the standard was decided by
consensus of the standard council with participation of interested parties including radio
equipment manufacturers, telecommunication operators, broadcasters, testing organizations,
general users, etc. with impartiality.
With the radio system described in the ARIB STANDARD herein, the electrical power
spreads over a wide bandwidth, and therefore it is necessary to avoid radio interference to
various radio systems in the band. In order to avoid harmful radio interferences to other radio
systems, “Operational Guidelines for UWB Radio Systems” and “Design Guidelines for UWB
Radio Systems” were also documented and attached hereto as a reference material.
It is our sincere hope that the standard would be widely used by radio equipment
manufacturers, testing organizations, general users, etc.