It is shown in [17-19] that the performance of a cognitive radio network can be improved by utilizing the double threshold detector
for local detection.
A simple amplitude threshold detector
in previous JRC system can demodulate the EBPSK modulated pulse echoes, resulting in a simple receiver structure.
A threshold detector
automatically sends an interrupt to the processor if the average power level of any DDC core falls below or exceeds a programmable threshold.
This situation, which is caused by the presence of bias in the coherence estimate especially for low values , degrades considerably the detection performance of the sample threshold detector
(see Section 5).
* An EnOcean STM 110C solar powered sensor transmitter (STM) module--the STM module integrates a wireless sensor, a low-power radio, a solar cell power generator, a microcontroller, an ultra low-power sleep timer and a threshold detector
for energy management.
Receiver circuits for serial digital signals consist of an input signal conditioning, a clock recovery circuit and a threshold detector
. The clock recovery circuits are designed to track low rate variations in the incoming data frequency.
Voltage threshold detector
set at 0.8 volts to detect '1's
If the A/C input is set low, the operation will be dependent upon the status of the threshold detector
. If the RF input signal level is below the set threshold, the device will be armed, ready to initiate a conversion (with delay) after the threshold is exceeded, at which point a single conversion will take place.
It has a threshold detector
to eliminate faulty discharge counts and a touch-panel display including a keypad for parameter setting and control showing functional and test data.
To monitor the signal level in an RF path, a switch is used to divert the signal at the monitoring point to the threshold detector
. Continuous monitoring of the signal level is accomplished by using a directional coupler to divert a portion of the signal to the threshold detector
, allowing the remaining signal to continue along the signal processing chain, as shown in Figure 5.
A new line of coaxial threshold detectors
designed for microwave and millimeter wave applications can be used for analyzing radar performance, leveling pulsed signal sources, and making AM noise measurements.