Fig. 4From: Practical designs for out-of-band emission suppression and adjacent channel interference rejection for orthogonal frequency division multiplexing-based cognitive radiosSpectral containments. In the legends, for F(k), k is the filter length; for W(k), k is the windowing roll-off length; and for SP(R) and PMix(R), R is the redundancy length of the spectral precodingBack to article page