Designing high-order FIR filters

Often there are linear phase filtering applications where it is necessary to design very high performance (very narrow passband widths, and/or very high attenuation) nonrecursive FIR filters. Consider the possibility that you’ve used the equation below ( in which attn is the stopband attenuation) or some other algorithm, to determine that you need to implement a 2000-tap linear phase FIR …