Appendix B. Noise Figure Calculations for Link Budgets

Computing receiver noise and SNR at a receiver is important for determining coverage and quality of service in a wireless communication system.

As shown in Chapters 3, 6, and 7, SNR determines the link quality and impacts the probability of error in a wireless communication system. Thus, the ability to estimate SNR is important for determining suitable transmitter powers or received signal levels in various propagation conditions.

The signal level at a receiver antenna may be computed based on path loss equations given in Chapters 3 and 4. To compute the noise level of a receiver, it is necessary to know the gains (or losses) of each receiver stage, as well as the ambient noise temperature at ...

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