Amplitude shift keying, Frequency Shift Keying, Binary Phase Shift Keying: Generation and Detection
1. In a binary ASK system over an AWGN channel, if the energy of symbol '1' is E_s and symbol '0' is represented by zero energy, what is the theoretical bit error probability?
2. In binary FSK with coherent detection, how do you ensure orthogonality between the two tones in a symbol duration T?
3. In PSK modulation, what is the key impact of using Gray coding in symbol mapping?
4. A coherent BFSK system uses orthogonal frequencies. What is the minimum bit error probability in AWGN for equal energy signals?
5. In an 8-PSK system, how many bits are affected on average per symbol error if Gray coding is not used?
6. In non-coherent binary FSK, what causes the degradation in bit error rate compared to coherent FSK?
7. In M-ASK with M > 2, what limits the minimum distance between signal levels for fixed average power?
8. What is the peak-to-average power ratio (PAPR) concern in M-ASK compared to BPSK or BFSK?
9. In M-PSK, why does increasing M increase the bit error rate at fixed SNR?
10. In a binary ASK system with coherent detection, what kind of filter maximizes the SNR at the detector?