A downhole sensing system includes a casing connector configured to fluidly couple segments of a downhole conduit through which a fluid flows. The downhole sensing system includes a sensing device disposed in the casing connector and configured to measure one or more parameters. The downhole sensing system also includes a wireless communication device disposed in the casing connector and configured to wirelessly communicate one or more parameters.

A downhole sensing system includes a casing connector configured to fluidly couple segments of a downhole conduit through which a fluid flows. The downhole sensing system includes a sensing device disposed in the casing connector and configured to measure one or more parameters. The downhole sensing system also includes a wireless communication device disposed in the casing connector and configured to wirelessly communicate one or more parameters.

An apparatus comprises a transmitter that transmits a signal, a receiver, a multiplier, and a signal shifter included in one of the transmitter and the receiver. The receiver receives a reflected signal comprising an interferer signal with at least one of an amplitude noise or a phase noise and generates a baseband signal comprising a real portion and an imaginary portion. The multiplier multiplies the imaginary portion by a value β chosen based on a power difference α between the amplitude noise and the phase noise, resulting in a modified baseband signal. The signal shifter shifts the interferer signal and the modified baseband signal. An estimator can process the reflected signal and estimate a frequency and phase of the interferer signal for the signal shifter. The value β can be represented as: $\beta =\frac{1}{{\alpha }^2}$
where α represents the power difference between the amplitude noise and the phase noise.

An apparatus comprises a transmitter that transmits a signal, a receiver, a multiplier, and a signal shifter included in one of the transmitter and the receiver. The receiver receives a reflected signal comprising an interferer signal with at least one of an amplitude noise or a phase noise and generates a baseband signal comprising a real portion and an imaginary portion. The multiplier multiplies the imaginary portion by a value β chosen based on a power difference α between the amplitude noise and the phase noise, resulting in a modified baseband signal. The signal shifter shifts the interferer signal and the modified baseband signal. An estimator can process the reflected signal and estimate a frequency and phase of the interferer signal for the signal shifter. The value β can be represented as: $\beta =\frac{1}{{\alpha }^2}$
where α represents the power difference between the amplitude noise and the phase noise.

An apparatus for detecting sleep disorders, such as obstructive sleep apnea, includes a housing insertable into an ear canal of a subject. A sensor disposed within the housing measures a position of the subject's head relative to an axis of gravity. A transducer is responsive to the sensor and is capable of creating a stimulus detectable by the subject under certain conditions. In various embodiments, a controller receives signals corresponding to a pitch angle and a roll angle of the subject's head measured by the sensor, determines if the pitch and roll angles correspond to a sleep apnea inducing position, and causes the transducer to generate a stimulus upon determining that the subject's head is in the sleep apnea inducing position more than a predetermined threshold number of times. Various parameters of the stimulus may be modified with successive stimulus generation until a non-sleep apnea inducing position is detected.

A transmitter device includes a transmitter circuit, a voltage generator circuit, and a calibration circuit. The transmitter circuit is configured to selectively operate in a calibration mode or a normal mode in response to a first control signal, in which the transmitter circuit has a first output terminal and a second output terminal. The voltage generator circuit is configured to generate a bias voltage, in which the bias voltage has a first level in the calibration mode and has a second level in the normal mode, and the first level is different from the second level. The calibration circuit is configured to be turned on in the calibration mode according to the bias voltage and a second control signal, in order to calibrate a level of the first output terminal and a level of the second output terminal.

A transmitter device includes a transmitter circuit, a voltage generator circuit, and a calibration circuit. The transmitter circuit is configured to selectively operate in a calibration mode or a normal mode in response to a first control signal, in which the transmitter circuit has a first output terminal and a second output terminal. The voltage generator circuit is configured to generate a bias voltage, in which the bias voltage has a first level in the calibration mode and has a second level in the normal mode, and the first level is different from the second level. The calibration circuit is configured to be turned on in the calibration mode according to the bias voltage and a second control signal, in order to calibrate a level of the first output terminal and a level of the second output terminal.

Disclosed is a method for transferring data during power transfer in a wireless power transfer system (100). The wireless power transfer system (100) comprises a power transmit device (120) arranged to transfer power over an inductive wireless power transfer interface (105) operating at a transmit frequency to a power receive device (110). The wireless power transfer system (100) is adapted to transfer information at half duplex using Frequency Shift Keying, FSK, in one direction and Amplitude Shift Keying, ASK, in the other direction. The method comprises transferring, at the transmit frequency by the power transmit device (120), power to the power receive device (110) and, during the transferring transmitting, at the transmit frequency by one of the power transmit device (120) or the power receive device (110) a first data packet to the other of the power transmit device (120) or the power receive device (110) using one of two modulation types being FSK or ASK. The method further comprises, during the transmitting, determining, by the device (110, 120) transmitting the first data packet, if a signaling condition is fulfilled, and if the signaling condition is fulfilled, changing a data communication configuration of the device (110, 120) transmitting (311) the first data packet. Further to this, a power transmit device, a power receive device and a test system is disclosed.

The current invention relates to methods and systems for evaluating a filling state of a load bearing means by means of a monitoring system comprising a sensing module; said load bearing means adapted for being carried by a transport unit; said load bearing means comprising a loading space; said sensing module situated in proximity to said load bearing means and outside of said loading space; said sensing module comprising an emitter, a receiver, an evaluator and a memory comprising calibration data; said sensing module configured for carrying out a plurality of steps; wherein a spacing S between said emitter and said receiver does not exceed 200 mm; and wherein a maximum dimension M of said load bearing means is not smaller than 4 m.

The current invention relates to methods and systems for evaluating a filling state of a load bearing means by means of a monitoring system comprising a sensing module; said load bearing means adapted for being carried by a transport unit; said load bearing means comprising a loading space; said sensing module situated in proximity to said load bearing means and outside of said loading space; said sensing module comprising an emitter, a receiver, an evaluator and a memory comprising calibration data; said sensing module configured for carrying out a plurality of steps; wherein a spacing S between said emitter and said receiver does not exceed 200 mm; and wherein a maximum dimension M of said load bearing means is not smaller than 4 m.