| Q. |
The power efficiency of the M ary PSK decreases because of the |
| A. | freely packed constellation |
| B. | increment of bandwidth efficiency |
| C. | fixed null bandwidth |
| D. | densely packed constellation |
| Answer» D. densely packed constellation | |
| Explanation: bandwidth efficiency increases as the value of m increases. but at the same time, increasing m implies that the constellation is more densely packed. hence the power efficiency or noise tolerance is decreased. | |
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