Complex sentence: The DFB is efficiently implemented via an l-level tree-structured decomposition that leads to 2 ^ l subbands with wedge-shaped frequency partitioning as shown in Figure 6 (a).
Split into simpler sentences: The DFB is implemented via an l-level tree-structured decomposition. These decompositions lead to 2 ^ l subbands with wedge-shaped frequency partitioning as shown in Figure 6 (a).