Intel Corporation

Nokia Solutions and Networks Oy

Nokia Corporation

Nokia Technologies Oy

Omnipoint Corporation

Jrc Canada

Nokia Siemens Networks Oy

Japan Radio Co., Ltd.

Xircom Wireless, Inc.

Darrell W Barabash

Russell A Morris

Ramasamy Gopalan

Joseph Smetana, Jr

Kodanda R Engala

Mehdi Alijan

Abhijit Ghose

Russell Morris

A method, apparatus and computer program product are provided disable one or more antennas of an antenna array in order to achieve a predefined objective while selectively utilizing the remainder of the antennas of the antenna array. The one or more antennas to be disabled are selected in a manner to avoid appreciable impact to the fidelity of the resulting array radiation pattern. For example, the method, apparatus and computer program product may disable certain antenna elements based upon the distance of the antenna elements from a predefined location relative to the antenna array, such as the distance from the center of the antenna array, and may selectively utilize the remainder of the antenna elements such that an active portion of the antenna array approximates a circular array which results in an array radiation pattern for which the fidelity is maintained.

Method and apparatus to selectively utilize antennas of an antenna array

Method, apparatuses, and computer program product for beam steering to support beam dithering in high aspect ratio antenna arrays are provided. One method may include applying a beam steering phase shift to a plurality of antenna array elements in an antenna array. The method may also include applying a non-uniform phase offset to each of the antenna array elements in addition to the beam steering phase shift. In addition, the method may include shifting a beam angle of the antenna array based on a combination of the beam steering phase shift and the non-uniform phase offset at each of the antenna array elements. The non-uniform phase offset may be a minimum phase increment.

Beam steering resolutions enhancement

According to an aspect, there is provided a printed circuit board-based resistive device. The resistive device comprises, arranged on a substrate of the printed circuit board of the printed circuit board: a first conductive pad; a second conductive pad; a resistive patch having a first longitudinal end connected to the first conductive pad and a second longitudinal end connected to the second conductive pad, wherein a width of the resistive patch varies along a length of the resistive patch and has a maximum at a point between the first and second longitudinal ends.

Resistive device

Systems, methods, apparatuses, and computer program products for array antenna adaptive digital pre-distortion with Bayesian observation analysis are provided. One method may include selecting a plurality of patch elements from an array antenna of a network element. The method may also include determining an accuracy confidence value for each patch element. A set of coefficients of the antenna array may be generated. In addition, an ensemble of non-linear forward models may be generated using the accuracy confidence value and the set of coefficients. Further, an array of pre-distortion signals may be generated using the ensemble of non-linear forward models, and each antenna of the array antenna may be configured with a corresponding pre-distortion signal from the array of pre-distortion signals.

Array antenna adaptive digital pre-distortion with bayesian observation analysis

In accordance with some embodiments, an apparatus, comprising at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to transmit at least one data packet according to a link budget. The apparatus may further adjust at least one antenna beam steering angle in 3-dimensions according to an optimum dither angle or plurality of dither angles. The apparatus may further adjust at least one antenna pattern according to a predetermined tilt.

Active antenna array dithering to improve scanning efficiency and reduce beam indices

Methods, apparatus, and computer program products using spectrum analysis or cross correlation techniques to discriminate against interference. These approaches are straight forward if both the forward and reflected signals contain complex or quadrature (I and Q) samples. But, if only single axis samples are available as is often the case to reduce the sampling rate, the resulting samples could represent the I component, the Q component or, more likely, some combination of the two. This generally requires some type of time alignment procedure to ensure proper phase. Assuming that the transmitted signal exists in complex form, this signal can be mathematically rotated in phase and then single axis sampled for comparison against the single axis reflected signal. If the rotation is done over equally spaced intervals that spans one complete cycle, the average of the absolute value all such return loss ratios will approach the actual return loss ratio and the interference will be suppressed. The resultant can be compared to a threshold value and trigger an alarm.

Method and apparatus for VSWR estimation using cross-correlation and real sampling without the need for time alignment

A method includes determining a total forward power using a frequency domain version of a forward signal transmitted over a cable/connector system to one or more antennas. The method includes determining a total reflected power using a frequency domain version of a reflected signal including a reflected version of the forward signal. The method also includes determining a condition of the cable/connector system using the total forward power and the total reflected power. The method may include determining an estimated reflection coefficient based on the total forward power and the total reflected power and associating the estimated reflection coefficient with the condition of the cable/connector system. Apparatus, program products, and software are also disclosed.

VSWR estimation using spectral analysis to suppress external interference

A method includes accessing sets of correlation values, each set corresponding to a correlation performed between a number of first samples and a same number of second samples. The sets of correlation values were determined by aligning the number of the first samples with selected second samples and sliding the number of first samples across the second samples to select different sets of the second samples. The first samples are samples of a forward signal transmitted over a cable/connector system to one or more antennas, and the second samples are samples of a reflected RF signal that comprises a reflected version of the forward signal. The method includes determining a maximum value from the plurality of sets of correlation values, and associating the maximum value with a return loss of the cable/connector system. Apparatus, computer programs, and program products are also disclosed.

VSWR estimation using correlation to suppress external interference

Communications equipment including communications equipment for wireless communications may benefit from power amplifier transistors having stabilized characteristics. For example, certain power amplifier transistors may benefit from having their characteristics stabilized during bias switching. An apparatus can include a power amplifier device. The apparatus can also include a voltage or current input to the power amplifier device. An input voltage or current to the voltage or current input can be configured to be controlled according to scheduled transmission in a slot. The apparatus can also include a gate bias insertion circuit provided at the bias input. The gate bias insertion circuit can be configured to provide a reduced input voltage or current as a power amplifier bias. The reduced input voltage or current can be configured to correspond to a threshold of a transistor of the power amplifier when transmission is not scheduled in a slot.

Power amplifier transistor characteristic stabilization during bias switching

A power amplifier architecture includes high and low power paths. The high power path may include a number of different amplifier structures. The low power path includes a switching element configured to short a signal line to ground or provide an open between the signal line and ground. The low power path and an output of the high power path are summed at a summing junction. Circuitry, responsive to one or more control signals, is configured in a high power mode to turn on amplifier(s) in the amplifier structure, route an input signal through a driver amplifier to the high power path and place the switching element in one of the open/closed positions; the circuitry is configured in a low power mode to turn off the amplifier(s), route the input signal through a driver amplifier to the low power path and place the switching element in the other position.

High efficiency power amplifier architecture for off-peak traffic hours

A forward error correction (FEC) method is provided including an FEC dynamic central station and a plurality of FEC dynamic remote stations that transmit bearer data and corresponding error correction data therebetween during a plurality of time frames. The error rate of the communication channel is measured and the amount of error correction data transmitted is accordingly and dynamically adjusted, so that the minimum amount of overhead required to effectively transmit the error correction data is used.

Dynamic forward error correction

A transreceiver allows efficient operation in a full or half-duplex TDD or FDD system. The preferred transreceiver includes a common set of filters used for both FDD (Frequency Division Duplex) and TDD (Time Division Duplex) operation in a given range of frequencies thereby reducing circuitry count and implementation costs. Thus, the transreceiver of the present invention can operate in FDD operation or TDD operation.

Filtering method to allow FDD and TDD operations in PCS transreceivers

The invention relates to a temperature compensating circuit for an amplifier. The circuit comprises a voltage regulator, a component arrangement and a resistor coupling of at least two resistor units. At least part of the output voltage of the temperature compensating circuit is adjustable. The component arrangement includes at least one component with a known temperature dependency of voltage. The resistor coupling forms a slope coefficient as a ratio of values of the resistors in the resistor coupling. The resistor coupling is coupled to the a component arrangement in order to provide the temperature compensating circuit with an output voltage having a temperature dependency which is a function of the slope coefficient and the known temperature dependency of the component arrangement.

Temperature compensating circuit

An integrated radiating enclosure is disclosed. The enclosure housing is formed from a dielectric material with a radiating element formed on the exterior surface of the housing and a groundplane material formed on the interior of the housing. The groundplane provides EMI shielding for the enclosed electronics. The three antenna elements are directly connected to the circuitry of a transceiver system, thereby integrating the transceiver antenna components directly into the transceiver enclosure.

Growing community of inventors

Grapevine, TX, United States of America

Darrell W Barabash