A wearable wireless audio device includes a support, an electronics circuit, and a speaker. The support includes a first ear stem and an orbital, and is configured to support at least one lens in a wearer's field of view. The electronics circuit is supported by the support and is configured to receive at least one digital audio file and generate an audio signal indicative of the at least one digital audio file. The speaker is supported by the support, and is directed toward at least one of the wearer's ears. The speaker is configured to convert the audio signal into sound. The speaker has a speaker face, and the speaker is configured to rotate from a first position in which the speaker face is substantially parallel to a yz-plane to a second position in which the speaker is inclined at an angle with respect to the yz-plane. The speaker is coupled to the support with a speaker pivot, and is configured to rotate about the speaker pivot while maintaining the speaker face substantially parallel to a yz-plane. The speaker is configured to move along an axis substantially parallel to a z-axis with respect to the support.

Wireless interactive headset

A cellular communications system comprising a space based system comprising a first set of cells, and a ground based system comprising a second set of cells. The space and ground systems can optionally function substantially autonomously, with each using spectrum from at least one predetermined frequency band.

Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis

Antenna switching circuitry in a multi-transceiver mobile terminal 10 , which features a first switching unit (SW 1 ) which controllably couples a first transceiver port (P 1 ) to either a first antenna port (P A1 ) or a second antenna port (P A2 ); and a second switching unit (SW 2 ) which controllably couples the second antenna port (P A2 ) to either the first transceiver port (P 1 ), through the first switching unit (SW 1 ), or to an input/output port (P I/O ) of a second transceiver ( 12 ). According to this scheme, the second antenna port is coupled to the input/output port of the second transceiver ( 12 ) in a mode in which the second transceiver ( 12 ) is operational, the first transceiver port (P 1 ) being decoupled from the second antenna port at this time, wherein the first transceiver port is coupled to the first antenna port and the input/output port of the second transceiver ( 12 ) is decoupled from the second antenna port, when the first transceiver is in a transmit mode, and wherein the first transceiver port is coupled to either of the first and second antenna ports, when the first transceiver ( 11 ) is in a receiving mode and the input/output port of the second transceiver ( 12 ) is decoupled from the second antenna port.

Antenna sharing switching circuitry for multi-transceiver mobile terminal and method therefor

A system and method of operation for efficiently reusing and/or sharing at least a portion of the frequency spectrum between a first satellite spot beam and a second satellite spot beam, and/or an underlay terrestrial network associated with a second satellite spot beam. The spectrum is efficiently reused and/or shared between respective spot beams and/or associated underlay terrestrial systems in a manner minimizes interference between the respective satellite and terrestrial systems.

Coordinated satellite-terrestrial frequency reuse

A data input management system is disclosed, for allowing a user to select one or more data sources, to be placed either simultaneously or one at a time into electrical communication with a single user interface. The user interface may comprise a wearable support, such as an eyeglass frame, adapted to carry one or more of speakers, microphone and video display, depending upon the desired functionality. Source electronics may be carried by the support or carried remotely, and in wireless communication with the support using Bluetooth protocols or other data transmission technology.

Data input management system for wearable electronically enabled interface

A dual-radio communication apparatus has a first radio device, such as a Bluetooth radio, for use in a first frequency band, and a second radio device, such as a Globalstar satellite radio, for use in a second frequency band, which is proximate to the first frequency band. The communication apparatus also has a controller coupled to the first and second radio devices. The first radio device may comprise a frequency-hopping spread-spectrum transmitter. Moreover, the first radio device has a first operating mode employing a first frequency range. The first radio device also has a second operating mode employing a second frequency range, which is smaller than the first frequency range. The controller is adapted to set the first radio device in its second operating mode, when the second radio device is in operation, and otherwise set the first radio device in its first operating mode.

Dual-radio communication apparatus, and an operating method thereof

In a radio communications unit with several transceivers communicating in different frequency bands, a signal parameter of a selected channel is monitored in order to detect interference due to intermodulation products. The select channel is for example used by a long range radio communications link and the interfering channel on a short range radio link. Once the channel causing interference has been identified, transmissions on it are prevented.

Interference prevention in a radio communications system

There is described a radio communications system, including a unit which is able to communicate over a radio communications network such as a satellite or cellular system, and is also able to communicate with a device such as a portable handset over a short range radio link. In order to avoid potentially troublesome interference on the communications path with the communications network, the unit is able to detect the strength of signals received on the short range radio link, and alert the user if those signals are such as to be a potential source of interference.

Radio communications unit

A method and apparatus (200) for modulating I and Q signals to compensate for phase error between the quadrature outputs of a local oscillator (126) of a quadrature modulator(s). The error in the quadrature outputs of the local oscillator is effectively compensated by pre-processing (201) incoming I(t) and Q(t) baseband signals to generate composite signals adding (102) and subtracting (108) scaled (202, 210, 204, 214) I(t) and Q(t). These composite signals form the input (19, 21) of quadrature modulator(s), the method comprising the steps of : applying a first scaling factor to an input I signal; applying a second scaling factor to an input Q signal; adding the scale I and Q signals; subtracting the scale I and Q signals; and quadrature modulating the added and subtracted signals.

Method and apparatus for quadrature modulation

A reference frequency generator circuit for a radio frequency transmit and receive apparatus comprises: a first voltage controlled oscillator which is operable to produce a first reference frequency signal, a second voltage controlled oscillator which is operable to produce a second reference frequency signal, a switchable set of dividers, connected to receive the first and second reference frequency signals, and operable to produce a set of output reference frequency signals therefrom, a first subset of the set of output reference frequencies being derived from the first reference frequency, and a second subset of the set of output reference frequencies being derived from the second reference frequency, wherein the first and second reference frequency signals are not equal in frequency to the output reference frequency signals in the set of output reference frequency signals.

Robert Owen Bristow

Papers

Dual-radio communication apparatus, and an operating method thereof

Interference prevention in a radio communications system

Radio communications unit

Method and apparatus for quadrature modulation

Frequency generator with multiple voltage-controlled oscillators