The present disclosure includes ingestible devices. In some examples, an ingestible device is presented that includes a framework, a control device secured to the framework, and a partial power source. The partial power source may include a first digestible material secured to the framework and electrically coupled to the control device, and a second digestible material electrically isolated from and dissimilar to the first digestible material, electrically coupled to the control device, and secured to the framework. The partial power source may be configured to provide power to the control device when the first and second digestible materials come in contact with a conductive fluid. The control device, after being provided power by the first and second digestible materials, may be configured to alter conductance between the first and second digestible materials to produce a current signature through the conductive fluid that is detectable by a receiver.

A method for recognising a user whose body is capable of re-transmitting an electromagnetic signal in the form of an electromagnetic wave. The method is implemented on a transceiver device and includes the following steps on the device: transmitting an electromagnetic pulse signal; obtaining a re-transmitted signal when the user is in the vicinity of the device, the signal depending on the transmitted pulse signal; comparing the re-transmitted signal with at least one reference signal of the user; and recognising the user if the re-transmitted signal is close to the reference signal.

Systems, methods, and computer-readable media are disclosed for secured intrabody networks and interfaces for IoT and ultrasound wideband. Example devices may include a wearable device in contact with a surface of a human body, the wearable device including an ultrasonic wave generator configured to transmit ultrasonic waves, and an external receiver configured to receive the ultrasonic waves and determine data encoded in the ultrasonic waves. The ultrasonic waves may encode a single bit of data in multiple pulses through a pseudorandom time hopping scheme.

A transmitter for a magnetic body area network includes a power oscillator that directly uses a body coil as a resonant element. Shunt transistor circuitry is between the power oscillator and the body coil, the shunt transistor circuitry selectively shunts current from the body coil in response to a data signal provided to the transmitter. Power injection circuitry is synchronized to the power oscillator to selectively inject power into the body coil in response to the data signal. A tuning capacitor array is disposed to tune frequency in the body coil. A frequency-locked-loop responds to a frequency in the body coil and tunes the tuning capacitor array to lock to a carrier frequency. Very high Q coils can be used while achieving high data transmission rates of 5 mbps to 10 mbps. Transmitters and methods are applicable to on-off-key modulation, frequency-shift modulation and amplitude-shift modulation.

According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for: obtaining a propagation profile for wireless signals transmitted between at least two devices via a creeping wave along a user's skin; causing transmission of electromagnetic radiation towards a plurality of locations on a target user's body to obtain dielectric properties of their skin at the plurality of locations based on an amount of the electromagnetic radiation reflected from each location; determining whether the propagation profile correlates with a realizable creeping wave along the target user's skin, the realizability being based on the obtained dielectric properties of their skin; and forming an association between the target user and the at least two devices based on a strength of correlation between the propagation profile and a realizable creeping wave.

Provided is and electrode selection device communicating with a capsule endoscope. The device includes an analog front end configured to recover first data based on first signals transmitted from the capsule endoscope to a first electrode and a second electrode, recover second data based on second signals transmitted from the capsule endoscope to the first electrode and a third electrode, and recover third data based on third signals transmitted from the capsule endoscope to the second electrode and the third electrode, and a digital receiver configured to calculate a first correlation value between the first and second electrodes, a second correlation value between the first and third electrodes, and a third correlation value between the second and third electrodes based on the first to third data. The digital receiver calculates first to third correlation sums, and selects a receiving electrode pair based on the first to third correlation sums.

Provided are an ultrasonic human body communication method and a device thereof, the method including dividing serial information into blocks, and each information block includes modulation bits and index bits; each transmission frame is divided into multiple groups; performing an index modulation on the groups of each transmission frame, determining activated group sequence numbers; performing a digital modulation on the modulation bits of each information block, and mapping the digitally modulated modulation bits to activated groups; for the multiple information blocks processed in parallel, performing a parallel/serial conversion, a pulse shaping, and an ultrasonic conversion in sequence to obtain a transmission signal, and transmitting the transmission signal in a human body through a transmission frame; on a receiving node, receiving a received transmission signal propagated by the human body, and demodulating the received transmission signal to obtain the index bits and the modulation bits.

A method for low power communication links between wireless devices is described. The method includes establishing, by a first wireless device, a first magnetic communication link to a source wireless device through a human body. The method also includes establishing, by a second wireless device, a second magnetic communication link to the source wireless device through the human body. The method also includes receiving, by the first wireless device via the first magnetic communication link and the second wireless device via the second magnetic communication link, communications from the source wireless device through the human body.

A method and apparatus for providing a communication method comprising: receiving at a first communication device, a signal from a second communication device over a first communication channel, said signal comprising first information; transmitting a response from said first communication device to said second communication device, said response being dependent on said signal received from said second communication device, wherein one of said first and second communication channels is a body coupled communication channel and the other of said first and second communication channels is a radio frequency channel.

Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include controlling communication pulse parameter(s) of one or more communication pulses (produced by pulse generator(s)) based on accelerator output(s) indicative of the orientation of the IMD. The communication pulse parameter(s) that is/are controlled can be, e.g., communication pulse amplitude, communication pulse width, communication pulse timing, and/or communication pulse morphology. Such embodiments can be used to improve conductive communications between IMDs whose orientation relative to one another may change over time, e.g., due to changes in posture and/or due to cardiac motion over a cardiac cycle.