10.2 BER vs. (in 1.5 MHz) in a Rayleigh channel simulated in urban environment S/N Measurements of BER vs. were made on the data channels, using a fading channel simulator. S/N The Rayleigh channel simulations correspond to Fig. 5 in Cost 207 documentation (typical urban area, 0-0.5 and the receiver travelling at a speed of 15 km/h. s) The results are shown in Figs 10 and 11. FIGURE 10 BER vs. S/N for System A (Transmission Mode I, 226 MHz) FIGURE 11 BER vs. S/N for System A (Transmission Mode II, 1 480 MHz) 10.3 BER vs. (in 1.5 MHz) in a Rayleigh channel simulated in rural environment S/N Measurements of BER vs. were made on the data channels using a fading channel simulator. S/N The Rayleigh channel simulations correspond to Fig. 4 in Cost 207 documentation (rural area, nonhilly, 0-5 and the receiver travelling at 130 km/h. The results are shown in Figs 12 and 13. s) FIGURE 12 BER vs. S/N for System A (Transmission Mode I, 226 MHz) FIGURE 13 BER vs. S/N for System A (Transmission Mode II, 1 480 MHz) 10.4 Sound quality versus RF S/N A number of subjective assessments have been performed in to evaluate the sound quality versus the The transmission path included equipment for establishing the in a Gaussian S/N. S/N channel and, using a fading channel simulator, in a Rayleigh channel. Two different simulation were used in the case of a Rayleigh channel, the same as those described in §§ 10.2 “models” and 10.3. In each case a listening test was conducted in which the average was reduced in 0.5 dB steps to S/N establish, in sequence, the following two conditions: the onset of impairment, which is the point at which the effects of errors start to become – noticeable. This was defined as the point where 3 or 4 error-related events could be heard in a period of about 30 s; the point of failure, which is the point at which a listener would probably stop listening to – the programme because it became unintelligible or because it no longer provided the
10.2 BER vs. S/N (in 1.5 MHz) in a Rayleigh channel simulated in urban environment Measurements of BER vs. S/N were made on the data channels, using a fading channel simulator. The Rayleigh channel simulations correspond to Fig. 5 in Cost 207 documentation (typical urban area, 0-0.5 s) and the receiver travelling at a speed of 15 km/h. The results are shown in Figs 10 and 11. FIGURE 10 BER vs. S/N for System A (Transmission Mode I, 226 MHz) FIGURE 11 BER vs. S/N for System A (Transmission Mode II, 1 480 MHz) 10.3 BER vs. S/N (in 1.5 MHz) in a Rayleigh channel simulated in rural environment Measurements of BER vs. S/N were made on the data channels using a fading channel simulator. The Rayleigh channel simulations correspond to Fig. 4 in Cost 207 documentation (rural area, nonhilly, 0-5 s) and the receiver travelling at 130 km/h. The results are shown in Figs 12 and 13. FIGURE 12 BER vs. S/N for System A (Transmission Mode I, 226 MHz) FIGURE 13 BER vs. S/N for System A (Transmission Mode II, 1 480 MHz) 10.4 Sound quality versus RF S/N A number of subjective assessments have been performed in to evaluate the sound quality versus the S/N. The transmission path included equipment for establishing the S/N in a Gaussian channel and, using a fading channel simulator, in a Rayleigh channel. Two different simulation “models” were used in the case of a Rayleigh channel, the same as those described in §§ 10.2 and 10.3. In each case a listening test was conducted in which the average S/N was reduced in 0.5 dB steps to establish, in sequence, the following two conditions: – the onset of impairment, which is the point at which the effects of errors start to become noticeable. This was defined as the point where 3 or 4 error-related events could be heard in a period of about 30 s; – the point of failure, which is the point at which a listener would probably stop listening to the programme because it became unintelligible or because it no longer provided the
R-REC-BS.1114-8-201406-S!!MSW-E.docx