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?
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2. In binary FSK with coherent detection, how do you ensure orthogonality between the two tones in a symbol duration T?
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3. In PSK modulation, what is the key impact of using Gray coding in symbol mapping?
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4. A coherent BFSK system uses orthogonal frequencies. What is the minimum bit error probability in AWGN for equal energy signals?
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5. In an 8-PSK system, how many bits are affected on average per symbol error if Gray coding is not used?

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6. In non-coherent binary FSK, what causes the degradation in bit error rate compared to coherent FSK?
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7. In M-ASK with M > 2, what limits the minimum distance between signal levels for fixed average power?
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8. What is the peak-to-average power ratio (PAPR) concern in M-ASK compared to BPSK or BFSK?
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9. In M-PSK, why does increasing M increase the bit error rate at fixed SNR?
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10. In a binary ASK system with coherent detection, what kind of filter maximizes the SNR at the detector?
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