Hi, I am developing an application which changes between the QPSK and BPSK modulations based on the signal level. My transmitter path is set as follows.
File source --> Packet Encoder --> Constellation modulator --.> USRP sink. Initially, the constellation of the 'Constellation modulator' is set to a QPSK Constellation Rect. Object. To change the modulation to BPSK I change the Constellation Rect. Object to BPSK. Everything works fine for the change from QPSK to BPSK. But when I try to change back to QPSK from BPSK I get the following error. sched: <block pfb_arb_resampler_ccf (12)> is requesting more input data than we can provide. ninput_items_required = 13525 max_possible_items_available = 8191 If this is a filter, consider reducing the number of taps. I appreciate if you could help me to solve this problem. Thank you Damindra -- Damindra Savithri Bandara, Ph.D. in Information Technology (Candidate) George Mason University, Fairfax, Virginia
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