Division 3 UWB DEVICES INSTALLED IN MOTOR AND RAILWAY VEHICLES

United Kingdom

Technical requirements
The LDC mitigation technique and its limits are defined in clauses 4.5.3.1, 4.5.3.2 and 4.5.3.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
The DAA mitigation technique and its limits are defined in clauses 4.5.1.1, 4.5.1.2 and 4.5.1.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
The Transmit Power Control (‘TPC’) mitigation technique and its limits are defined in clauses 4.7.1.1, 4.7.1.2 and 4.7.1.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
The exterior limit (e.l.) ≤ – 53,3 dBm/MHz is required. The exterior limit is defined in clauses 4.3.4.1, 4.3.4.2 and 4.3.4.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
Frequency range	Maximum mean power spectral density (e.i.r.p.)	Maximum peak power (e.i.r.p.)(defined in 50 MHz)
f ≤ 1,6 GHz	– 90 dBm/MHz	– 50 dBm
1,6 < f ≤ 2,7 GHz	– 85 dBm/MHz	– 45 dBm
2,7 < f ≤ 3,1 GHz	– 70 dBm/MHz	– 36 dBm
3,1 < f ≤ 3,4 GHz	– 70 dBm/MHz or – 41,3 dBm/MHz using LDC^f1 + e.l.^f2 or – 41,3 dBm/MHz using TPC^f3+ DAA^f4 + e.l.	– 36 dBm or ≤ 0 dBm or ≤ 0 dBm
3,4 < f ≤ 3,8 GHz	– 80 dBm/MHz or – 41,3 dBm/MHz using LDC + e.l. or – 41,3 dBm/MHz using TPC+DAA + e.l.	– 40 dBm or ≤ 0 dBm or ≤ 0 dBm
3,8 < f ≤ 4,8 GHz	– 70 dBm/MHz or – 41,3 dBm/MHz using LDC + e.l. or – 41,3 dBm/MHz using TPC+DAA + e.l.	– 30 dBm or ≤ 0 dBm or ≤ 0 dBm
4,8 < f ≤ 6 GHz	– 70 dBm/MHz	– 30 dBm
6 < f ≤ 8,5 GHz	– 53,3 dBm/MHz or – 41,3 dBm/MHz using LDC + e.l. or – 41,3 dBm/MHz using TPC + e.l.	– 13.3 dBm or ≤ 0 dBm or ≤ 0 dBm
8,5 < f ≤ 9 GHz	– 65 dBm/MHz or – 41,3 dBm/MHz using TPC+DAA + e.l.	– 25 dBm or ≤ 0 dBm
9 < f ≤ 10,6 GHz	– 65 dBm/MHz	– 25 dBm
f > 10,6 GHz	– 85 dBm/MHz	– 45 dBm

Technical requirements to be used within the bands 3,8-4,2 GHz and 6-8,5 GHz for vehicular access systems using trigger-before-transmit are defined in the following table.

Technical requirements
Frequency range	Maximum mean power spectral density (e.i.r.p.)	Maximum peak power (e.i.r.p.)(defined in 50 MHz)
3.8 < f ≤ 4,2 GHz	– 41,3 dBm/MHz with trigger-before-transmit operation and LDC ≤ 0,5 % (in 1h)	0 dBm
6 < f ≤ 8,5 GHz	– 41,3 dBm/MHz with trigger-before-transmit operation and LDC ≤ 0,5 % (in 1h) or TPC	0 dBm

‘Trigger-before-transmit’ mitigation is defined as a UWB transmission that is only initiated when necessary, specifically where the system indicates that UWB devices are nearby. The communication is either triggered by a user or by the vehicle. The subsequent communication can be considered as ‘triggered communication’. The existing LDC mitigation applies (or alternatively TPC in the 6 GHz to 8,5 GHz range). An exterior limit requirement must not be applied when using the trigger-before-transmit mitigation technique for vehicular access systems.

Trigger-before-transmit mitigation techniques that provide an appropriate level of performance in order to comply with the essential requirements of Directive 2014/53/EU shall be used for vehicular access systems. If relevant techniques are described in harmonised standards or parts thereof the references of which have been published in the Official Journal of the European Union under Directive 2014/53/EU, performance at least equivalent to these techniques shall be ensured. These techniques shall respect the technical requirements of this Decision.

Annotations

Footnotes

f1: The LDC mitigation technique and its limits are defined in clauses 4.5.3.1, 4.5.3.2 and 4.5.3.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
f2: The exterior limit (e.l.) ≤ – 53,3 dBm/MHz is required. The exterior limit is defined in clauses 4.3.4.1, 4.3.4.2 and 4.3.4.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
f3: The Transmit Power Control (‘TPC’) mitigation technique and its limits are defined in clauses 4.7.1.1, 4.7.1.2 and 4.7.1.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.
f4: The DAA mitigation technique and its limits are defined in clauses 4.5.1.1, 4.5.1.2 and 4.5.1.3 of ETSI Standard EN 302 065-3 V2.1.1. Alternative mitigation techniques may be used if they ensure at least an equivalent performance and level of spectrum protection in order to comply with the corresponding essential requirements of Directive 2014/53/EU and respect the technical requirements of this Decision.