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calculated from the transmission power and adjusted based on the Tx gain
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of the transmitter, Rx gain of the receiver, and any path loss propagation |
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of the transmitter, Rx gain of the receiver, and any path loss propagation |
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model in effect. |
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model in effect. |
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The packet reception occurs in two stages. First, an event is scheduled |
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The packet reception occurs in three stages. First, an event is scheduled |
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for when the PLCP header has been received. PLCP header is often transmitted |
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for when PHY preamble has been detected. This decides whether the preamble |
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can be detected, by calling a preamble detection model. In case there is no |
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preamble detection model attached to the PHY, it assumes preamble is always detected. |
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Currently, there is only a simple threshold-based preamble detection model in ns-3, |
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called ``ThresholdPreambleDetectionModel``. If PHY preamble has been successfully detected, |
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it schedules a second event for when PHY header has been received. PHY header is often transmitted |
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at a lower modulation rate than is the payload. The portion of the packet |
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at a lower modulation rate than is the payload. The portion of the packet |
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corresponding to the PLCP header is evaluated for probability of error |
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corresponding to the PLCP header is evaluated for probability of error |
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based on the observed SNR. The InterferenceHelper object returns a value |
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based on the observed SNR. The InterferenceHelper object returns a value |