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| Q. |
Which of the following is the ratio of signal energy per bit to noise power spectral density? |
| A. | bandwidth efficiency |
| B. | spectral density |
| C. | power efficiency |
| D. | power density |
| Answer» C. power efficiency | |
| Explanation: power efficiency is often expressed as the ratio of signal energy per bit to noise power spectral density required at the receiver input for a certain probability of error. power efficiency is a measure of how favourably the trade-off between fidelity and signal power is made. | |
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