Abstract: A rotor, for a compressor of a gas turbine, comprising a rotatable support for rotation about an axis of rotation and a plurality of blades. Each blade comprising a hub, a leading edge and a trailing edge and a chord is defined between the leading edge and the trailing edge. Each of the blades extends from its hub away from the rotatable support and at least one of the blades has a hub-thickness to chord ratio greater than 10 percent. The leading edge of the at least one of the blades at its hub is positioned at a leading-edge-hub-radius from a position of the axis of rotation and the trailing edge of the at least one of the blades is positioned at its hub at a trailing-edge-hub-radius from the position of the axis of rotation. The trailing-edge-hub-radius is greater than the leading-edge-hub-radius.

Abstract: A wireless communication signal in Long Term Evolution (LTE) may be interleaved in a manner which permits a partitioning of a received inter-column bit-reversed interleaved code block for improved de-interleaving. The code block may be divided into equal subportions which may be simultaneously de-interleaved both forward and backward, and in parallel with other subportions. An even number of subportions may be provided. Dividing a received code block in this manner may improve de-interleaving performance.

Abstract: Systems and methodologies are described that facilitate automatically generating interleaved addresses during turbo decoding. An efficient recursive technique can be employed in which layers of nested loops enable the computation of a polynomial and a modular function given interleaved parameters “a” and “b” from a look up table. With the recursive technique, interleaved addresses can be generated, one interleaved address per clock cycle which can maintain turbo decoding performance.

Abstract: Wireless communication receiver with hybrid equalizer and RAKE receiver. The receiver compares performance of the system for RAKE only and RAKE in combination with equalizer estimates. The receiver enables or disables the equalizer accordingly.

Abstract: A rotor, for a compressor of a gas turbine, comprising a rotatable support for rotation about an axis of rotation and a plurality of blades. Each blade comprising a hub, a leading edge and a trailing edge and a chord is defined between the leading edge and the trailing edge. Each of the blades extends from its hub away from the rotatable support and at least one of the blades has a hub-thickness to chord ratio greater than 10 percent. The leading edge of the at least one of the blades at its hub is positioned at a leading-edge-hub-radius from a position of the axis of rotation and the trailing edge of the at least one of the blades is positioned at its hub at a trailing-edge-hub-radius from the position of the axis of rotation. The trailing-edge-hub-radius is greater than the leading-edge-hub-radius.

Abstract: A method for characterising the surface profile of a component comprises the steps of a) dividing the surface into at least two regions; b) for each region, measuring the surface and selecting a number of measured points to define a co-ordinate dataset for the region; c) for each region, applying a curve-fitting algorithm to the dataset for the region to define the surface profile of the region; d) combining the defined surface profiles for the regions to produce a defined surface profile for the aerofoil surface. The characterization may be used in the design, analysis and manufacturing steps of product development, thereby decreasing the total time and work required.

Abstract: A method for defining the shape of an edge of an aerofoil comprises the following steps: obtaining a starting value for the thickness of the edge; defining a distance from the edge of the aerofoil in terms of the thickness; over the defined distance, defining a space S in terms of normalised camberline and normalised thickness; transforming the space S to a new space S?; parameterising the new space S? to obtain new values for normalised camberline and normalised thickness; defining a new shape for the edge using the new parameter values. In a preferred embodiment, the transforming step comprises applying a parabolic function to the space S.

Abstract: Certain aspects of the disclosure propose a unified channel estimation algorithm that combines two or more channel estimation algorithms in a single piece of hardware or software. The proposed unified channel estimation may dynamically switch, based on one or more metrics, between different modes of operation that utilize different channel estimation algorithms.

Abstract: Certain aspects of the disclosure propose parallel channel estimation and interference cancellation in a wireless communications system. For each common reference signal tone offset, interference cancellation and channel estimation may be performed independently. The proposed channel estimation method may increase performance of a system.

Abstract: An apparatus including a test circuit, an output circuit and a control circuit. The test circuit may be configured to generate test data in response to one or more test vectors. The output circuit may be configured to present data in a first mode and prevent presentation of data in a second mode. The output circuit may be configured to switch between the first mode and the second mode in response to a control signal. The control circuit may be configured to generate the control signal according to predetermined criteria for protecting secure data within the apparatus while allowing the test data to be presented.

Abstract: Systems and methodologies are described that facilitate automatically generating interleaved addresses during turbo decoding. An efficient recursive technique can be employed in which layers of nested loops enable the computation of a polynomial and a modular function given interleaved parameters “a” and “b” from a look up table. With the recursive technique, interleaved addresses can be generated, one interleaved address per clock cycle which can maintain turbo decoding performance.

Abstract: Wireless communication receiver with hybrid equalizer and RAKE receiver. The receiver compares performance of the system for RAKE only and RAKE in combination with equalizer estimates. The receiver enables or disables the equalizer accordingly.

Abstract: A method for characterising the surface profile of a component comprises the steps of a) dividing the surface into at least two regions; b) for each region, measuring the surface and selecting a number of measured points to define a co-ordinate dataset for the region; c) for each region, applying a curve-fitting algorithm to the dataset for the region to define the surface profile of the region; d) combining the defined surface profiles for the regions to produce a defined surface profile for the aerofoil surface. The characterisation may be used in the design, analysis and manufacturing steps of product development, thereby decreasing the total time and work required.

Abstract: Wireless communication receiver with hybrid equalizer and RAKE receiver. The receiver compares performance of the system for RAKE only and RAKE in combination with equalizer estimates. The receiver enables or disables the equalizer accordingly.

Abstract: An apparatus including a test circuit, an output circuit and a control circuit. The test circuit may be configured to generate test data in response to one or more test vectors. The output circuit may be configured to present data in a first mode and prevent presentation of data in a second mode. The output circuit may be configured to switch between the first mode and the second mode in response to a control signal. The control circuit may be configured to generate the control signal according to predetermined criteria for protecting secure data within the apparatus while allowing the test data to be presented.

Abstract: Techniques to adjust the phase rotation of a modulated signal to compensate for the phase rotation introduced by circuit elements associated with the transmit signal path. In one implementation, at least one control signal is received, with each control signal being provided to adjust a particular characteristic (e.g., gain, bias current) of one or more circuit elements (e.g., VGA, PA) associated with the transmit signal path. The circuit elements can be located directly in, or operatively coupled to, the transmit signal path. A phase rotation corresponding to an operating state defined by the received control signal(s) is then determined, and the phase of the modulated signal is rotated by an amount related to the determined phase rotation. The phase rotation compensation can be performed at various locations along the transmit signal path by rotating either the data, the PN sequences used to spectrally spread the data, or the carrier signals used to modulate the data.

Abstract: Method for optimizing an equalizer at a receiver in a communication system by training virtual parallel equalizers. Multiple configurations are applied for training an equalizer, and a performance measurement or estimate determined. The performance measures of the multiple configurations are compared to determine the optimum configuration. The training and selection are performed at a rate sufficiently higher than the received sample rate as to allow optimization in between processing of data samples.

Abstract: A method and apparatus for encoding multiple bits in parallel wherein outputs are generated recursively. During each clock cycle, the encoder processes multiple bits and generates outputs consistent with those generated sequentially over multiple clock cycles in a conventional convolutional encoder. In one embodiment, input data is stored in multiple memory storage units, which are then each uniquely addressed to provide data to parallel encoders.

Abstract: Wireless communication receiver with hybrid equalizer and RAKE receiver. The receiver compares performance of the system for RAKE only and RAKE in combination with equalizer estimates. The receiver enables or disables the equalizer accordingly.

Abstract: A concatenated encoder capable of coding multiple data bits in parallel and including a first (outer) encoder, a memory, and a second (inner) encoder coupled in cascade. The first encoder receives and codes M data bits in parallel in accordance with a first coding scheme to generate MR code bits. The memory receives and stores unpunctured ones of the MR code bits from the first encoder. The second encoder receives and codes N code bits in parallel in accordance with a second coding scheme to generate coded data. M and N can be any values (e.g., M≧8, N≧4). Each encoder can be a (e.g., a rate ½) convolutional encoder that implements a particular polynomial generator, and can be implemented with one or more look-up tables, a state machine, or some other design.