Abstract: A large-scale radio frequency signal information processing and analysis system that provides advanced signal analysis for telecommunication applications, including band capacity and geographical density determinations and detection, classification, identification, and geolocation of signals across a wide range of frequencies and across broad geographical areas. The system may utilize a range of novel algorithms for bin-wise processing, Rayleigh distribution analysis, telecommunication signal classification, receiver anomaly detection, transmitter density estimation, transmitter detection and location, geolocation analysis, telecommunication activity estimation, telecommunication utilization estimation, frequency utilization estimation, and data interpolation.

Abstract: A system and method for detecting and identifying emitted electromagnetic signals, comprising wideband radio frequency sensors, at least one wide band radio frequency receiving antenna and accompanying electronics, a platform for hosting multiple antennas and sensor mounts, and processing algorithms for detection and identification of electromagnetic (EM) signals. Various algorithms and implementations are employed to detect and identify, over a wide frequency range, narrow or wide bandwidth EM signals having low signal levels, time-varying, and/or time-intermittent characteristics.

Abstract: Described herein are methods and apparatus monitoring a patient. In one example, a sensor that is configured to detect physiological changes in a patient is driven at a first current level and a subsequent sensor voltage is measured. Thereafter the current is varied to a second current level, and a next sensor voltage is measured. A next sensor voltage is projected based on the sensor voltage and the subsequent sensor voltage, and a third current level is identified that could produce the next sensor voltage. The third current level is compared to a threshold, and an alarm is produced in response thereto. The apparatus further includes elements in the sensor that facilitate the method.

Abstract: A system is provided including a cardiac output monitor configured to be operatively connected to a detection module that obtains electrocardiogram (ECG) signals from the patient. The monitor includes an axis analysis module and a cardiac output module. The axis analysis module is configured to obtain ECG axis information including information corresponding to at least one ECG axis of a patient. The axis analysis module is also configured to determine ECG axis change information corresponding to a change in the ECG axis information of the patient. The cardiac output analysis module is configured to determine a change in cardiac output using the ECG axis change information.

Abstract: A system is provided including a cardiac output monitor configured to be operatively connected to a detection module that obtains electrocardiogram (ECG) signals from the patient. The monitor includes an axis analysis module and a cardiac output module. The axis analysis module is configured to obtain ECG axis information including information corresponding to at least one ECG axis of a patient. The axis analysis module is also configured to determine ECG axis change information corresponding to a change in the ECG axis information of the patient. The cardiac output analysis module is configured to determine a change in cardiac output using the ECG axis change information.