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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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