Abstract: Systems and methods for antenna selection in a wireless terminal with two radios are provided. Signals received using first and second antennas are demodulated by first and second modems according to first and second protocols. A receive path between the second antenna and the second modem can be controlled to receive signals according to the first protocol. A performance measure of demodulating, according to the first protocol, a signal received using the second antenna is determined. The performance measure may be determined using a mirror module in the second modem or using a search module in the first modem. The wireless terminal switches antennas so that the first modem demodulates a signal received using the second antenna, if the performance measure for using the second antenna is such that the switch would improve performance of the first modem.

Abstract: A technique to open a single receiving window to perform scanning and initiating operations in a Bluetooth Low Energy compliant device, instead of using two separate receiving windows to perform the equivalent operations. The combining of the scanning and initiating operations in one receiving window, instead of two separate windows, reduces power consumption and provides for bandwidth efficiency.

Abstract: Information is acquired from a geographically-distributed sensor network using a scalable wireless geocast protocol. Geographically distributed networks of unattended sensors are placed at desired locations to collect various types of information, such as, for example, environmental parameters, temperature, humidity, rainfall, heat signatures, video, audio, seismic activity, and/or wind conditions. To acquire information, a query is provided to the geographic area at which the sensors are located utilizing the geocast protocol. Delivery of the query is based on a physical location of a region in which a sensor network is located, the type of information being queried, and/or temporal conditions. Each sensor that receives a query determines if all requirements/conditions are satisfied. If so, the query is accepted and processed by the recipient sensor, and responded to accordingly. Responses to queries are provided via the geocast protocol.

Abstract: A compatible communication device includes an analog front end, a baseband communication unit, a wireless radio frequency module, a power line communication front end and a control unit. The analog front end is connected to each of the baseband communication unit, the wireless radio frequency module and the power line communication front end. The baseband communication unit transmits baseband signals. The analog front end performs signal conversion between digital domain and analog domain. The control unit selects, based on the channel quality for signal transmission, one or two of the power line communication front end and the wireless radio frequency module for communication. The signal receiving or transmission is performed through a power line if the power line communication front end is selected for communication. Or, the signal receiving or transmission is performed through a wireless channel if the wireless radio frequency module is selected for communication.

Abstract: A regenerative selective logarithmic detector amplifier (LDA) can have integrated FM demodulation capabilities. It can receive a wired or wireless FM modulated signal and amplify or demodulate it with high sensitivity, high skirt ratio and minimized noise when compared to the prior art. When used in conjunction with other circuits such as a PLL or mixer, it can improve interference rejection and frequency selectivity and be locked on a precise channel in frequency and phase. The LDA produces intermittent oscillations that are self-quenched when reaching a given threshold. It also embeds the circuitry to perform direct FM discrimination. FM demodulation process is completed by a simple analog or digital frequency to voltage converter. This plus the fact that the instantaneous regeneration gain is low-medium permit to detect signals of small amplitudes buried in the noise.

Abstract: A mobile wireless communications device includes a housing an antenna, and radio frequency (RF) circuitry. A transceiver is connected to the antenna and a processor is operative with the RF circuitry. The transceiver includes an In-phase and Quadrature (I/Q) Modulation and Power Amplification circuit having an In-phase (I) circuit with a modulator mixer and power amplifier circuit. A Quadrature (Q) circuit includes a modulator mixer and power amplifier circuit. A power combiner receives the separately amplified In-phase and Quadrature signals and sums and outputs the signals as a combined I and Q signal. The I and Q circuits are isolated from the combined I and Q signal to enhance antenna matching and transmitted radiated power (TRP) and reduce harmonic emission from the power amplification circuits.

Abstract: Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.

Abstract: A conformal antenna system comprising one or more proximate antenna elements for very reliable localized reception and transmission of radiowave energy and power particularly in frequency controlled VHF, UHF and microwave spectrum is described. The system incorporates effective angle or proximity dependent interference mitigation for conventional transmitters/receivers or master controlled constellations of wireless devices, and is suitable for temporary or permanent installation and use in a variety of outdoor and in-building locations. The antenna elements are configured and optimized for close proximity but unobtrusive positioning near the point of use on stages, in concert halls, movie studios, houses-of-worship, and convention centers, and are configured to be relatively unaffected by people or furniture in very close proximity. Methods for manufacturing and using close proximity antennas are disclosed, as are systems and methods for the generation and control of signals thereto.

Abstract: The present disclosure provides for a method and a communication device comprising an Electric Field, EF, sensor and a communication circuitry for initiating situational based communication actions in the communication device. The method comprises detecting a change in the electric field surrounding the communication device using the EF sensor, determining that the change in the electric field has a predetermined characteristic and activating the communication circuitry depending on the determination.

Abstract: A transceiver for near field communication may include: a resonance circuit coupled between a first node and a second node, the resonance circuit having a resonance frequency and being configured to emit an electromagnetic wave to communicate data with an external device; a first capacitor coupled between the first node and a third node; a second capacitor coupled between the second node and a fourth node; and/or a filter coupled among a first transmission electrode, a second transmission electrode, the third node, and the fourth node in an asymmetrical structure to provide a first frequency response and a second frequency response to the first transmission electrode and the second transmission electrode, respectively, the first frequency response being different from the second frequency response, the filter being configured to receive the data through the first transmission electrode and the second transmission electrode.

Abstract: A mobile communication device may use sensor data to identify the current device state based on sensor data, device parameter values and/or device usage data. The mobile communication device may then measure the impedance value of a characteristic circuit, such as the antenna or the power amplifier. Responsive to determining that the measured impedance value differs from a pre-defined base impedance value by more than a certain threshold value, the mobile communication device may retrieve, from a memory, a set of envelope tracking (ET) parameter values corresponding to the current state of the communication device and the measured impedance value. The mobile communication device may calculate, using the retrieved ET parameter values, a target supply voltage to be applied to the power amplifier.

Abstract: In a first aspect the present invention relates to a method of compensating for propagation delay in a wireless communication system. A first base station is in communication with a first plurality of antenna units which are adapted to be in wireless communication with a first terminal. The first terminal having a terminal antenna. The first plurality of antenna units is spatially separated. The method according to the first aspect comprises the steps of determining relative propagation delay from each of the first plurality of antenna units to the terminal antenna and using the determined propagation delay to establish a delay profile to compensate for propagation delay from each of the antenna units to the first terminal and applying the delay profile to a transmission between the base station and the terminal. In a second aspect the present invention further relates to a system implementing the method according to the first aspect.

Abstract: In an exemplary embodiment, the communication device including an analog filter, where a digital signal processor sets the gain of the analog filter and the pole location of the filter simultaneously in order to maintain the filter pole location at a desired value or within a desired range. In further exemplary embodiments, the methodology to simultaneously set the gain and the pole location of the filters.

Abstract: A communication device is described comprising a plurality of receive paths, wherein each of the plurality of receive paths is configured to extract a multipath component of a received signal, a determiner configured to determine whether at least two of the plurality of receive paths fulfil a mutual interference correlation criterion among the plurality of receive paths and a processor configured, if at least two of the plurality of receive paths fulfil the interference correlation criterion among the plurality of receive paths, to determine the sent signal based on canceling or mitigating the interference between the multipath components of the received signal extracted by the at least two receive paths.

Abstract: A variable capacitance device includes: a first and second terminal for signals; a plural, even number of variable capacitance elements connected in-series between the first and second terminal; a third and fourth terminal for receiving a same voltage; a fifth and sixth terminal for grounding; a plurality of first resistors connected to either the third or fourth terminal on one end; and a plurality of second resistors connected to either the fifth or sixth terminal on one end. With respect to a series of successive nodes beginning with the first terminal and ending with the second terminal, respective other ends of a pair of the first resistors are connected to every other node, and respective other ends of a pair of the second resistors are connected to the remaining every other node, such that the pairs of first and second resistors are alternately connected to the series of successive nodes.

Abstract: A logarithmic detector amplifying (LDA) system is provided for use as a high sensitivity receive booster or replacement for a low noise amplifier in a receive chain of a communication device. The LDA system includes an amplifying circuit configured to receive an input signal having a first frequency and generate an oscillation based on the input signal, a sampling circuit coupled to the amplifying circuit and configured to terminate the oscillation based on a predetermined threshold to periodically clamp and restart the oscillation to generate a series of pulses modulated by the oscillation and by the input signal, and one or more resonant circuits coupled with the amplifying circuit and configured to establish a frequency of operation and to generate an output signal having a second frequency, the second frequency being substantially the same as the first frequency.

Abstract: A method for inductively coupled communications is described. The method includes generating a retransmitted modulated signal that is stronger than a received signal from a first device. The method also includes generating a suppressed carrier signal from the retransmitted modulated signal for retransmission to the first device. The method further includes filtering a superimposed signal of the suppressed carrier signal on the received signal to attenuate modulation sidebands. The method additionally includes synchronizing to the first device based on the filtered signal.

Abstract: A network device on a home-control network receives inputs from local sensors and physical actions from the user and determines whether to change its state.

Abstract: Example apparatuses and methods for cancellation of transmitter self-interference leakage in a transceiver are described. An example transceiver includes a multiport transformer that may be used as a part of the impedance matching network on the receiver side of the transceiver. One primary port of the multiport transformer may form a portion of a cancellation circuit that, along with other components in a cancellation path, provide amplitude and/or phase modulation to a cancellation signal. The cancellation circuit may tunable and may include only reactive components in some examples.

Abstract: Near Field Communication (NFC) supports server information handling system management through communication between a mobile information handling system and a baseboard management controller. Enhanced transfer by NFC of management information is provided by manipulating the NFC tag memory assigned for information transfer with the aid of a microcontroller coordinating NFC transfers at the baseboard management controller, such as with coordinated storage operations at a tag memory an supporting processors/microcontrollers. The microcontroller manages tag memory and/or system memory so that the portable information handling system writes and reads information beyond the capabilities of unaided tag memory.