[Discuss-gnuradio] number of taps in pfb filter??

[gsmandvoip]

hello list,

when I am trying to channelize a baseband with following specs:

sample rate: 2MHz

bandwidth for low pass filter: 145kHz

transition bandwidth: 10 kHz

number of channels: 10

pfb decimation: 4

When I see number of channels is 91 taps/channel, but I think its too much, please guide me how to reduce taps/channel