DRM+ employs Orthogonal Frequency Division Multiplexing (OFDM) with Quadrature Amplitude Modulation (QAM). Details of the sub-carrier structure and modulation are in Table 1. 1 DRM+ Modulation scheme Modulation COFDM Number of sub-carriers 213 Sub-carrier spacing 444 Hz Modulation (data carriers) 4-QAM or 16-QAM Bandwidth 96 kHz The spectrum emission and transmitter masks for DRM+ are shown in Fig. 1 and Table 2 below. FIGURE 1 Spectrum mask for DRM+ and FM TABLE 2 Spectrum masks for FM and DRM+ ETSI mask for FM DRM+ mask Rel. level Rel. Level Offset Offset Attenuation (1 kHz) (1 kHz) kHz dB kHz dB dB –400 –85,0 –400,00 –85,0 –65,0 kHz dB kHz dB dB –300 –85,0 –300,00 –85,0 –65,0 kHz dB kHz dB dB –200 –80,0 –200,00 –80,0 –60,0 kHz 0,0 dB kHz dB dB –100 –100,00 –70,0 –50,0 100 kHz 0,0 dB kHz dB dB –70,00 –50,0 –30,0 200 kHz dB kHz dB 0,0 dB –80,0 –50,00 –20,0 300 kHz dB 50,00 kHz dB 0,0 dB –85,0 –20,0 400 kHz dB 70,00 kHz dB dB –85,0 –50,0 –30,0 100,00 kHz dB dB –70,0 –50,0 200,00 kHz dB dB –80,0 –60,0 300,00 kHz dB dB –85,0 –65,0 400,00 kHz dB dB –85,0 –65,0 The DRM+ signal can be offsets of multiples of 10 kHz from the nominal centre frequency. This feature can be further exploited by placing two DRM+ signals side by side, offset by kHz –50 and +50 kHz from the classical FM carrier frequency, so as to fill the nominal 200 kHz ETSI FM mask bandwidth. This DRM+” mask is shown in Fig. 2 and Table 3 below. “double
DRM+ employs Orthogonal Frequency Division Multiplexing (OFDM) with Quadrature Amplitude Modulation (QAM). Details of the sub-carrier structure and modulation are in Table 1. 1 DRM+ Modulation scheme Modulation COFDM Number of sub-carriers 213 Sub-carrier spacing 444 Hz Modulation (data carriers) 4-QAM or 16-QAM Bandwidth 96 kHz The spectrum emission and transmitter masks for DRM+ are shown in Fig. 1 and Table 2 below. 1 Spectrum mask for DRM+ and FM TABLE 2 Spectrum masks for FM and DRM+ ETSI mask for FM DRM+ mask Offset Rel. level (1 kHz) Offset Rel. Level (1 kHz) Attenuation –400 kHz –85,0 dB –400,00 kHz –85,0 dB –65,0 dB –300 kHz –85,0 dB –300,00 kHz –85,0 dB –65,0 dB –200 kHz –80,0 dB –200,00 kHz –80,0 dB –60,0 dB –100 kHz 0,0 dB –100,00 kHz –70,0 dB –50,0 dB 100 kHz 0,0 dB –70,00 kHz –50,0 dB –30,0 dB 200 kHz –80,0 dB –50,00 kHz –20,0 dB 0,0 dB 300 kHz –85,0 dB 50,00 kHz –20,0 dB 0,0 dB 400 kHz –85,0 dB 70,00 kHz –50,0 dB –30,0 dB 100,00 kHz –70,0 dB –50,0 dB 200,00 kHz –80,0 dB –60,0 dB 300,00 kHz –85,0 dB –65,0 dB 400,00 kHz –85,0 dB –65,0 dB The DRM+ signal can be offsets of multiples of 10 kHz from the nominal centre frequency. This feature can be further exploited by placing two DRM+ signals side by side, offset by –50 kHz and +50 kHz from the classical FM carrier frequency, so as to fill the nominal 200 kHz ETSI FM mask bandwidth. This “double DRM+” mask is shown in Fig. 2 and Table 3 below. FIGURE
R-REP-BS.2384-2015-MSW-E.docx