CONTENTS

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
Appendix 1 to Annex 1� Procedure for estimation of the minimum usable field strength
�2���� Receiver sensitivity
�3���� Other factors to be considered
Appendix 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
Appendix 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
Appendix 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
Appendix 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
Appendix 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� Measured RF protection ratios for IBOC (in band on-channel) DSB system in the MF band
�1���� Introduction
�2���� RF protection ratios
�3���� Channel spacing
�4���� Night-time and considerations for sky-wave protection
�5���� Conclusion