Aspects of the present disclosure describe scrambling of information for wireless communications to prevent deciphering or altering by unintended recipients. An example method may include generating, by a first device, a scrambling key based on at least one of a freshness parameter or a private key. The private key is known by the first device and a second device. The method also includes scrambling a payload based on the scrambling key at a physical layer. A packet includes the payload for wireless transmission from the first device to the second device via a shared channel.

Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.

A method includes identifying, by an electronic device, one or more segments within a first audio recording that includes one or more non-speech segments and one or more speech segments. The method also includes generating, by the electronic device, one or more synthetic speech segments that include natural speech audio characteristics and that preserve one or more non-private features of the one or more speech segments. The method also includes generating, by the electronic device, an obfuscated audio recording by replacing the one or more speech segments with the one or more synthetic speech segments while maintaining the one or more non-speech segments, wherein the one or more synthetic speech segments prevent recognition of some content of the obfuscated audio recording.

The present invention addresses the problem of providing a signal process in which a countermeasure against eavesdropping over a physical layer in a wireless communication is performed. An optical signal generation unit 11 generates, as an optical signal, multivalued information that is in a multivalued state and is based on prescribed data. An E/O conversion unit 112 converts the optical signal to an electrical signal. An optical signal amplification unit 12 amplifies the optical signal. An O/E conversion unit 13 converts the optical signal to an electrical signal. A radio wave transmission unit 14 transmits, as a radio wave, the multivalued information converted into the electrical signal. The problem is solved thereby.

A system and method for applying noise to data is described. The system accesses a metric value of a metric of each user from a group of users of an application. The metric indicates a measure of an operation of the application by a corresponding user. The system generates noise values and defines a distribution of the noise values to the group of users. The system modifies the metric value of the metric of each user with a corresponding noise value from the noise values based on the distribution.

A system and method for applying noise to data is described. The system accesses a metric value of a metric of each user from a group of users of an application. The metric indicates a measure of an operation of the application by a corresponding user. The system generates noise values and defines a distribution of the noise values to the group of users. The system modifies the metric value of the metric of each user with a corresponding noise value from the noise values based on the distribution.

Embodiments of communication systems are disclosed for protecting communication between an implanted device ID and an external device ED. Optionally, the ID communicates over the TET channel by modulating a load on the channel. While the ID is communicating the ED optionally adds noise to the TET channel, inhibiting malicious interception of the communication. Using knowledge of the noise signal, the ED cleans the noise from the TET signal to recover the communication from the ID. In some embodiments, the TET link is used to pass an encryption key and/or to verify communications over a radio channel. The TET channel may be authenticated. For example, authentication may include a minimum energy and/or power transfer.

The present disclosure relates to an envelope tracking system that is configured to improve the performance of radio frequency power amplifier circuitry by compensating for errors that become more significant as modulation bandwidth increases. These errors include power amplifier collector-base capacitance, time delay between power amplifier stages, and interconnect distance between the baseband modulation source and the power amplifier collector.

The present invention improves data transmission safety and data transfer rate, and reduces an increase in costs when doing so. A map management unit 141 manages a map which defines a prescribed rule for dividing pseudorandom number data into two. On the basis of the rule defined by the map, a division unit 142 generates data obtained by dividing the pseudorandom number data into two as vertically irregular mapping input data and horizontally irregular mapping input data. A vertically irregular mapping unit 151 generates data obtained by subjecting the vertically irregular mapping input data to irregular mapping processing as vertical base reference point data. A horizontally irregular mapping unit 152 generates data obtained by subjecting the horizontally irregular mapping input data to irregular mapping processing as horizontal base reference point data. A base reference point information generation unit 133 decides on one base on the basis of the vertical base reference point data and the horizontal base reference point data.

The purposes of the present invention are to improve safety of data transmission and a data transfer rate and to reduce an increase in costs for the improvement. An encryption unit 111 of a transmission device 1 generates encrypted data that allow plain data thereof to be uniquely identified

A segmentation unit 121 segments the encrypted data into two types of basal signal point number information on the basis of map data provided by a map management unit 122. A basal signal point number generation unit 113 generates basal signal point number information used as information to be transmitted, on the basis of a set of the two types of information, i.e. horizontal basal signal point number information and vertical basal signal point number information.