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| Q. |
What is the radius of the circle in M-ary PSK on which message points are equaly spaced? |
| A. | √es |
| B. | √eb |
| C. | eb |
| D. | es |
| Answer» A. √es | |
| Explanation: the m-ary message points are equally spaced on a circle of radius √es centred at the origin. here es is energy per symbol. thus, mpsk is a constant envelope signal when no pulse shaping is used. | |
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