Aspects of the subject disclosure may include, for example, receiving, by a feed point of a dielectric antenna, electromagnetic waves from a dielectric core coupled to the feed point without an electrical return path, where at least a portion of the dielectric antenna comprises a conductive surface, directing, by the feed point, the electromagnetic waves to a proximal portion of the dielectric antenna, and radiating, via an aperture of the dielectric antenna, a wireless signal responsive to the electromagnetic waves being received at the aperture. Other embodiments are disclosed.

Method and apparatus for coupling an antenna to a device

A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.

Remote distributed antenna system

Aspects of the subject disclosure may include, for example, a device that facilitates transmitting electromagnetic waves along a surface of a wire that facilitates delivery of electric energy to devices, and sensing a condition that is adverse to the electromagnetic waves propagating along the surface of the wire. Other embodiments are disclosed.

Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves

Aspects of the subject disclosure may include, for example, a system for detecting a fault in a first wire of a power grid that affects a transmission or reception of electromagnetic waves that transport data and that propagate along a surface of the first wire, selecting a backup communication medium from one or more backup communication mediums according to one or more selection criteria, and redirecting the data to the backup communication medium to circumvent the fault. Other embodiments are disclosed.

Method and apparatus that provides fault tolerance in a communication network

Aspects of the subject disclosure may include, for example, a transmission device that includes a transmitter that generates a first electromagnetic wave to convey data. A coupler couples the first electromagnetic wave to a single wire transmission medium having an outer surface, to forming a second electromagnetic wave that is guided to propagate along the outer surface of the single wire transmission medium via at least one guided wave mode that includes an asymmetric or non-fundamental mode having a lower cutoff frequency. A carrier frequency of the second electromagnetic wave is selected to be within a limited range of the lower cutoff frequency, so that a majority of the electric field is concentrated within a distance from the outer surface that is less than half the largest cross sectional dimension of the single wire transmission medium, and/or to reduce propagation loss. Other embodiments are disclosed.

Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith

Generally, this disclosure provides systems and methods for a modular antenna array using radio frequency (RF) and baseband (BB) beamforming. A system may include a plurality of antenna modules, each of the antenna modules further including an array of antenna elements coupled to an RF beamforming circuit, the RF beamforming circuit to adjust phase shifts associated with the antenna elements to generate an antenna beam associated with the antenna module; and a central beamforming module coupled to each of the antenna modules, the central beamforming module to control the antenna beam associated with each of the antenna modules and to generate signal adjustments relative to each of the antenna modules, wherein the arrays of antenna elements of the antenna modules combine to operate as a composite antenna beamforming array.

Modular antenna array with rf and baseband beamforming

Some demonstrative embodiments include apparatuses, systems and/or methods of transmit power control for wireless communication. For example, an apparatus may include a controller to control a plurality of transmit powers of a plurality of directional beams formed by an antenna array to transmit a wireless communication. The controller may control the plurality of transmit powers based on at least first and second power limits, the first power limit including a power density limit corresponding to a power density of a directional beam of the plurality of directional beams, and the second power limit including a total transmit power limit corresponding to a total of the transmit powers.

Apparatus, system and method of transmit power control for wireless communication

Multiple antenna transceivers combined with MIMO signal processing offer the potential for increased data rates and/or range in wireless systems. This paper presents a fully integrated 5-GHz 2times2 MIMO WLAN transceiver RFIC implemented in 90-nm CMOS. The paper identifies the key MIMO integration issues and proposes techniques to optimize MIMO performance. It is shown that crosstalk between the multiple transceivers residing on the same die can degrade MIMO performance and has to be carefully minimized, especially when power amplifiers are integrated on-die. A shared LO generation and distribution network is designed to maximize MIMO phase noise immunity without introducing undesired crosstalk. The fabricated MIMO receiver achieves a sensitivity of -63 dBm while receiving 108Mb/s in MIMO spatial multiplexing mode in the presence of a 25-ns Rayleigh fading channel. The sensitivity of a single receiver in the presence of AWGN noise is -76 dBm. Linearized 3.3-V 5-GHz power amplifiers with P1dB=20.5 \ dBm deliver an average power of +13/+16 dBm each, in MIMO/SISO modes respectively (EVM=-27/-25 dB). The measured performance demonstrates the effectiveness of the isolation techniques employed. The system in a package includes an 18 mm2 die and microstrip front-end matching networks implemented on a flip-chip package

A 5-GHz 108-Mb/s 2 $\times$ 2 MIMO Transceiver RFIC With Fully Integrated 20.5-dBm ${\rm P}_{\rm 1dB}$ Power Amplifiers in 90-nm CMOS

In a portable communication device (100) operated in a speakerphone mode, when no speech is present in either the outbound signal received from a communication system, the speaker (114) of the communication device is muted and the microphone (120) activated. When speech is detected in an inbound signal (202, 204, 206), and speech is also subsequently detected in the outbound signal (214), the speaker is left inactivated and the microphone kept in an activated state. To determine if speech is present in the inbound signal, the inbound signal is voided, providing a succession of frames (206), each frame having a frame energy parameter and a background noise parameter (208). If the frame energy of a given frame sufficiently exceeds the an average background noise value for the given frame, then speech is declared present. To smooth this half duplex operation, a timer may be used so that brief periods of silence or fricative parts of speech do not result in a revocation of the declaration of speech in the inbound signal.

Method for suppressing speaker activation in a portable communication device operated in a speakerphone mode

Architectures including digital outphasing transmitters. Digital signal generation circuitry generates at least two base-band sinusoid signals. Bandpass modulation circuitry is coupled to receive the base-band sinusoid signals and generates at least two modulated digital signals. Power amplifiers are coupled to receive the modulated digital signals to amplify the modulated digital signals. The amplified modulated signals are combined and transmitted.

Richard B. Nicholls

Papers

Modular antenna array with rf and baseband beamforming

Apparatus, system and method of transmit power control for wireless communication

A 5-GHz 108-Mb/s 2 $\times$ 2 MIMO Transceiver RFIC With Fully Integrated 20.5-dBm ${\rm P}_{\rm 1dB}$ Power Amplifiers in 90-nm CMOS

Method for suppressing speaker activation in a portable communication device operated in a speakerphone mode

Digital outphasing transmitter architecture