I'm new in this forum. I need help understanding and solving the following problems:

1. The digital massage signal of bandwidth B = 100kHz is transmitted through the bandpass AWGN channel and it has been received in the input of ideal demodulator with ratio Sin/Nin = 20dB. For error free detection of this signal the sufficient ratio Sout/Nout in output of ideal demodulator is 10dB.
a) Determine the sufficient transmission bandwidth for error free communication.
b) Propose some digital modulation scheme for this transmission if full width pulses are transmitted.

2. Consider 32-PSK transmission system.
a)Find the gap between real and theoretical values Eb/N0 to provide error.

Any help would be greatly appreciated. Thanks in advance.