Fig. 6From: Adaptive filters: stable but divergentThe worst-case learning behavior of the Bipartite PNLMS algorithm (random matrix) under various conditions: FIR filter vs. linear combiner and bipolar vs. Gaussian input. The PNLMS algorithm is potentially unstable, but by restricting the filter structure to FIR and the input alphabet to BPSK, the algorithm can become l 2−stableBack to article page