Hello, I have three signals routed to the Gnuradio Polyphase Channelizer Block. The system operates at a sample rate of 90 kHz with 3 channels spaced 25 kHz apart. One channel is centered around DC and the other two at +/-25 kHz. The 3 waveforms are routed into a Gnuradio Streams to Stream Block, so that a simple concatenated stream flows into the Gnuradio Polyphase Channelizer. I also set the Channelizer Block to use 120 Taps and provide 3-outputs. Here are my questions on observing the outputs
Q1. I was expecting each output (block set to 3 outputs) to be at the sample rate (90 kHz/3 =) 30 kz in each of the 3-plots. The plots show a sample rate based on the original rate of 90 kHz. Why is this? Q2. I expected each output waveform to be centered around DC, but they were instead centered around -25 kHz. Why? Q3. The output bandwidth for each waveform seems a little bigger than the input, why? I will appreciate any help that assists to point me in the right direction. Regards, George
