Tutorial Note4(2)

# Tutorial Note4(2) - ELEG 4503 Modern Communication Systems...

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ELEG 4503 Modern Communication Systems Tutorial 4 Sep 29, 2016

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Q1 M-ary Signaling (i) What is the symbol rate? (ii) What is the required channel bandwidth for data transmission? (iii) What is the maximum number of bit which can be transmitted by one symbol? (iii) Find ? 𝑏 &? 𝑏 (v) If we keep the symbol rate and required channel bandwidth unchanged while the amplitude changes to [-3, -1, 1, 3], will ? 𝑏 &? 𝑏 change? Why? 1 2 3 T 1 S
Q1 M-ary Signaling (i) What is the symbol rate? ? = 1 ? = 4??????/? (ii) What is the required channel bandwidth for data transmission? ? = 2? (????𝑖?? ???𝑒) 1 ? = 2? ? = 1 2? = 1 2 × 0.25 = 2𝐻? 1 2 3 T 1 S

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Q1 M-ary Signaling (iii) What is the maximum number of bit which can be transmitted by one symbol? ? = 2 𝑛 4 = 2 𝑛 ? = 2 (iv) Find ? 𝑏 &? 𝑏 ? = ?? 𝑏 ? 𝑏 = 1 2 × 0.25? = 0.125? ? 𝑏 = 1 ? 𝑏 = 8?𝑖?/? = ?? 1 2 3 T 1 S
Q1 M-ary Signaling (v) If we keep the symbol rate and required channel bandwidth unchanged while the amplitude changes to [-3, -1, 1, 3], will ? 𝑏 &? 𝑏 change? Why?

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