[Discuss-gnuradio] Combining filters

[Marcus D. Leech]

I have an application that's running on some fairly "spartan" hardware,
so I'm trying to find ways to make the
  flow-graph more computationally efficient, so that I have more
headroom for inevitable feature creep.

Part of my flow-graph has a FIR bandpass filter, which is followed
immediately by an FFT filter.  The FIR bandpass is simply
  to define my passband of interest (I bring in 1MHz, but only need/want
700KHz in the middle), and the FFT filter is designed
  to allow me to dynamically notch-out narrowband interferers.   Is
there an efficient way to combine these two into a single
  filter, that will be more computationally efficient than two filters
in series?

-- 
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org