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ch8_part2_passband - EEN 404 EEN Communication Systems Ch8...

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EEN 404 EEN 404 Communication Systems Communication Systems Ch8 Part II Ch8 Part II Passband Passband Data Transmission Data Transmission
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Three types of binary digital modulation • Amplitude-Shift Keying (ASK) • Phase-Shift Keying (PSK) • Frequency-Shift Keying (FSK)
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Amplitude-Shift Keying – On-off keying transmitter receiver matched filter threshold Error prob.
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Phase-Shift Keying transmitter Example: if m=0 antipodal signal
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transmitter Power in carrier Power in modulation
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matched filter threshold transmitter
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Error prob. When m=0
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Example 8.5 in the textbook Consider PSK with (a) By how many degrees does the modulated carrier shift in phase each time the binary data changes? (b) What percent of the total power is in the carrier, and what percent is in the modulation component? (c) What value of z=E b /N 0 is required to give P E = 10 -6
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Frequency-Shift Keying (FSK) transmitter threshold Bit energy error prob.
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