Energy Detection

Receiver Sensitivity

The transceiver must distinguish between ambient thermal noise and low-level radio signals. High receiver sensitivity enables the system to detect distant or weak transmitters, preventing collisions on the network. However, excessive noise within the receiver circuitry can trigger false detections, which unnecessarily delays the transmission of data packets.

Threshold Calibration

Setting the decision level requires a careful balance between false alarms and missed transmissions. Static thresholds are prone to failure as the background noise fluctuates, whereas adaptive mechanisms adjust the level based on real-time environmental measurements. This optimization is critical for maintaining high throughput in dense radio environments.

Channel Assessment

Sensing the medium before transmitting is mandatory in shared frequency bands. This quick scan ensures the device does not cause interference to other users. It serves as the foundation for listen-before-talk protocols.