Policy on Intellectual Property Right (IPR)
Annex 1 – Minimum usable field strengths for digital sound broadcasting (DSB)
(Digital Radio Mondiale (DRM) system) at frequencies below 30 MHz
1 Introduction
2 Relevant transmission parameters
2.1 DRM robustness modes
2.2 Spectrum occupancy types
2.3 Modulation and protection levels
3 Computation of minimum usable field strength
4 Further remarks
Attachment 1 to Annex 1 – Procedure for estimation of the minimum usable field
strength
2 Receiver sensitivity
3 Other factors to be considered
Attachment 2 to Annex 1 – Required S/N ratios for DRM reception
1 Introduction
2 S/N values for LF/MF bands
3 S/N values for HF bands
Attachment 3 to Annex 1 – Prediction and modelling of radiowave propagation
for DSB at frequencies below 30 MHz
1 Introduction
2 Prediction of HF sky-wave propagation
3 Prediction of MF ground- and sky-wave propagation
4 Modelling of propagation channels
Annex 2 – RF protection ratios for DSB (DRM system) at frequencies below 30 MHz
1 Introduction
2 RF protection ratios
3 RF power reduction for DSB
Attachment 1 to Annex 2 – Calculated RF protection ratios for DSB (DRM
system) at frequencies below 30 MHz
1 Introduction
2 Calculation parameters
2.1 Analogue signal
AM transmitter
AM modulation
AM receiver
2.2 DRM signal
Transmitter for digital signals
Receiver/demodulator for digital signals
3 RF protection ratios
Attachment 2 to Annex 2 – Method of measurements and determination of RF
protection ratios
1 Method of measurements in accordance with Recommendation ITU-R BS.559
1.1 Calculation method
1.2 RF power relationship AM/digital
1.3 Receiver characteristics
1.3.1 AM receiver selectivity curve
1.3.2 Digital receiver: required S/I
1.4 Use of the DRM spectrum mask
1.5 Frequency separations
2 Determination of RF protection ratios for DSB in the broadcasting bands
below 30 MHz
2.1 Introduction
2.2 Calculation model
2.2.1 Calculation method
2.3 Transmitter model
2.4 Receiver model
2.5 Future extension of the calculation model
3 Assumed system parameters
3.1 Spectrum masks
3.2 AM transmitter (Figs 5 to 8)
3.3 AM modulation (Figs 5 to 7)
3.4 AM receiver (Figs 11a and 11b)
3.5 Transmitter for digital signals
3.6 Digital modulation (Figs 9a and 9b)
3.7 Receiver for digital signals (Fig. 9a)
4 Verification of calculation method
5 Application for digitally modulated signals
6 Summary
Attachment 3 to Annex 2 – Calculated RF protection ratios for DSB (DRM system)
using 18 and 20 kHz bandwidths at frequencies below 30 MHz
1 Background
2 Basic parameters - Reminders
2.1 DRM bandwidths
2.2 Spectrum mask
2.3 DRM Signal
2.4 True values and relative values of protection ratios
3 Method to derive protection ratios for 18 and 20 kHz DRM signals
3.1 AM interfered with by DRM
3.1.1 Mode DRM_A2_9 kHz
3.1.2 Mode DRM_A3_10 kHz
3.1.3 Mode B2_9 kHz
3.1.4 Mode B3_10 kHz
3.1.5 Mode DRM_C3_10 kHz
3.1.6 Mode DRM_D3_10 kHz
3.2 DRM interfered with by DRM, identical modes
3.2.1 Mode DRM_A2_9 kHz
3.2.2 Mode DRM_A3_10 kHz
3.2.3 Mode DRM_B2_9 kHz
3.2.4 Mode DRM_B3_10 kHz
3.2.5 Mode DRM_C3_10 kHz
3.2.6 Mode DRM_D3_10 kHz
3.3 DRM interfered with by AM
3.3.1 Proposed method
3.3.2 Calculation
3.3 Digital (64-QAM, protection level No. 1) interfered with by
digital
3.3.1 Mode DRM_B0_4.5 kHz interfered with by B4_18 kHz
3.3.2 Mode DRM_B0_4.5 kHz interfered with by B5_20 kHz
3.3.3 Mode DRM_B1_5 kHz interfered with by B4_18 kHz
3.3.4 Mode DRM_B1_5 kHz interfered with by B5_20 kHz
3.3.5 Mode DRM_B2_9 kHz interfered with by B4_18 kHz
3.3.6 Mode DRM_B2_9 kHz interfered with by B5_20 kHz
3.3.7 Mode DRM_B3_10 kHz interfered with by B4_18 kHz
3.3.8 Mode DRM_B3_10 kHz interfered with by B5_20 kHz
3.3.9 Mode DRM_B4_18 kHz interfered with by B0_4.5 kHz
3.3.10 Mode DRM_B4_18 kHz interfered with by B1_5 kHz
3.3.11 Mode DRM_B4_18 kHz interfered with by B2_9 kHz
3.3.12 Mode DRM_B4_18 kHz interfered with by B3_10 kHz
3.3.13 Mode DRM_B4_18 kHz interfered with by B5_20 kHz
3.3.14 Mode DRM_B5_20 kHz interfered with by B0_4.5 kHz
3.3.15 Mode DRM_B5_20 kHz interfered with by B1_5 kHz
3.3.16 Mode DRM_B5_20 kHz interfered with by B2_9 kHz
3.3.17 Mode DRM_B5_20 kHz interfered with by B3_10 kHz
3.3.18 Mode DRM_B5_20 kHz interfered with by B4_18 kHz
4 Summary
4.1 AM interfered with by DRM
4.2 DRM interfered with by DRM, identical modes
4.3 DRM interfered with by AM
4.4 DRM interfered with by DRM, different modes
Annex 3 – Minimum usable field strengths for digital sound broadcasting (DSB)
IBOC system at frequencies 525 kHz – 1 705 kHz
1 Introduction
2 IBOC system configurations
2.1 Operating modes and parameters
3 Minimum usable field strength
3.1 Noise level related audio protection minimum usable field
strength (Legacy method)
3.2 Integrated receiver practice related minimum usable field
strength
Attachment 1 to Annex 3 – Procedure for estimation of the minimum usable field
strength
1 Spectrum management considerations and control
2 Field strength considerations
3 Background for calculating the actual noise factor at the receiver input
3.1 Determining the minimum usable field strength using ITU noise
related data
3.2 Determining the minimum usable field strength using receiver
practice integrated method
Attachment 2 to Annex 3 – Carrier to noise ratio for digital sound broadcast
(DSB) IBOC System
1 Reception level
1.1 Minimum C/N
Attachment 3 to Annex 3 – Conversion of C/N0 to SNR
for IBOC signals
Annex 4 – RF protection ratios for DSB (IBOC system) at frequencies between 525
kHz and 1 705 kHz
1 Introduction
2 IBOC system spectral mask
3 RF protection levels
3.1 Calculation methodology for interference involving analogue AM
3.2 Protection tables
Attachment 1 to Annex 4 – Calculation methodology for interference
1 Calculation methodology for interference involving analogue AM
2 IBOC Interference into analogue and protection
2.1 Desired AM signal interfered by IBOC hybrid
2.2 AM signal interfered by IBOC Digital