5.2.2 BER Plots
In this section we have presented various BER vs. SNR plots for all the mandatory modulation and coding profiles as speci ied in the standard on same channel models. Figure 5.10, 5.11 and 5.12 show the performance on SUI1, 2 and 3 channel models
respectively. It can be seen from this igures that the scheme provides better performance with less SNR. This can look at their constellation mapping; larger distance between larger noise (which makes the point shift from the original
lower modulation and coding be easily visualized if we adjacent points can tolerate place) at the cost of coding
rate. By setting threshold SNR, adaptive modulation schemes can be highest transmission speed with a target BER. SNR required to attain BER are tabulated in Table 5.1.
used to l e v e l a t 1 0 3
Figure 5.10: BER vs. SNR plot for different coding profiles on SUI1 channel