Methods, structures and computer program products for digital sample rate conversion are presented. An input digital sample with a first frequency is converted to an output sample with a second frequency. A sample rate conversion circuit is provided which provides an enhanced transposed farrow structure that enables an optimised trade-off between noise levels and computational complexity. Each output sample is derived by convolution of a continuous time interpolation kernel with a continuous time step function representing the input sample stream. In a sample rate conversion structure, there is a trade-off between the quality and the computational complexity. The quality is defined as a ratio between the (wanted) signal power and the (unwanted) noise power. The computational complexity may be defined as the average number of arithmetic operations that are required to generate one output sample. A higher computational complexity will generally lead to a higher power consumption and larger footprint.

A system includes a wireless device having a radio frequency (RF) receiver, an RF transmitter, and means for producing sensory feedback to a user of the wireless device. A position-tracking system includes at least three antennae. The position-tracking system computes a multi-dimensional position of the wireless device using triangulation or trilateration based on time of arrival information from radio signals transmitted by the RF transmitter of the wireless device and received by each of the at least three antennae. A processor receives the multi-dimensional position of the wireless device determined by the position-tracking system, correlates the multi-dimensional position to a point of interest registered with an interactive software program that produces a virtual reality environment, and generates, in response to the multi-dimensional position correlated with the registered point of interest, data configured to activate the sensory feedback producing means of the wireless device.

The switch device includes a control switch that turns on/off an electrical connection between an apparatus and the power supply, a condition judging circuit that judges conditions of driving the control switch, an electric wave reception circuit that receives an electric wave, and a power supply circuit that generates power from the electric wave received by the electric wave reception circuit. An electric wave transmission device that transmits an electric wave for making the switch device operate is arranged in a space, whereby the electric wave can be received by the electric wave reception device in the specific space. The switch device controls the control switch to be turned off/on when the electric wave is received. Alternatively, when the electric wave is not received, the switch device turns on/off the control switch.

An apparatus for communication in a wireless communication network comprises a coder that encodes a set of data symbols to produce a set of coded symbols; a modulator that modulates the coded symbols onto a set of subcarrier frequencies to generate a time-domain signal comprising a sum of a set of modulated pulse waveforms; and a transmitter configured for transmitting the time-domain signal in the wireless communication network. The coder employs a matrix of spreading codes, wherein each column of the matrix multiplies a different one of the data symbols, which causes the modulator to produce a corresponding one of the set of modulated pulse waveforms. Each column of the matrix of spreading codes comprises a set of linearly increasing phases, which provides a time offset to the corresponding modulated pulse waveforms.

A method is implemented by a computing device to monitor the performance of packet processing in an in-line service chain. The computing device is in communication with a plurality of network devices forming a software defined network (SDN) and the in-line service chain. The SDN includes a controller implemented by the computing device to configure the plurality of network devices. The plurality of devices includes a set of switches monitoring packets traversing the in-line service chain including at least one service.

A computer-implemented method comprises discovering, by a client device, an available host computing device implementing a radio receiver, wherein the host computing device is identified from a decentralized shared database; establishing, by the client device, a relationship with the host computing device based on discovering the host computing device from the decentralized shared database; receiving, by the client device, application data from the host computing device based on establishing the relationship, wherein the application data is associated with radio signals received by the radio receiver from a single transmitter; and storing, outputting, or displaying, by the client device, the application data.

Disclosed is a cognitive radio, CR, communication device, including a CR transceiver and a digital twin of the CR transceiver. The CR transceiver includes a radio scene analyser for analysing state information of a radio scene involving the CR communication device, and a cognitive engine for controlling a radio performance of the CR communication device. The cognitive engine includes a radio performance analyser for analysing a radio performance of the CR transceiver or a radio performance of the digital twin; a radio performance optimizer for optimizing the radio performance of the CR transceiver or the radio performance of the digital twin in accordance with the radio performance analyser and the radio scene analyser; and a radio configurator for configuring the CR transceiver or the digital twin in accordance with the radio performance optimizer.

Systems and methods for remotely monitoring liquids that are stored in containers in a storage facility are provided. A radiating cable that is in communication with a receiver is routed through the storage facility. Liquid monitoring systems are associated with each container and broadcast signals that are received by the radiating cables. Various aspects of the liquid can be monitored, such as volume level, atmospheric pressure, humidity, and temperature via sensors of the liquid monitoring system.

A correlating mixed signal spectrum analyzer receiver is provided that automatically correlates signals in a mixed-signal environment with a large number of waveforms having different characteristics corresponding to different protocols and modulation types, with the receiver utilizing either parallel correlators or sequential correlations to automatically accommodate the different waveforms such that in any given testing cycle, the spectrum analyzer runs through a comprehensive list of waveforms to detect the existence of corresponding signals. Frequency drift compensation and the utilization of multiple receivers for providing time difference of arrival calculations is described.

Methods, structures and computer program products for digital sample rate conversion are presented. An input digital sample with a first frequency is converted to an output sample with a second frequency. A sample rate conversion circuit is provided which provides an enhanced transposed farrow structure that enables an optimised trade-off between noise levels and computational complexity. Each output sample is derived by convolution of a continuous time interpolation kernel with a continuous time step function representing the input sample stream. In a sample rate conversion structure, there is a trade-off between the quality and the computational complexity. The quality is defined as a ratio between the (wanted) signal power and the (unwanted) noise power. The computational complexity may be defined as the average number of arithmetic operations that are required to generate one output sample. A higher computational complexity will generally lead to a higher power consumption and larger footprint.