Cavalcanti
Fco. Rodrigo P. Cavalcanti, Fortaleza - Ce BR
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20110128997 | Tensor-Based Receiver for Separating Component Signals in a Composite Signal - A receiver separates multiple component signals carried in a composite signal that have been spread over time and frequency. Multiple diversity branches receive the composite signal. A tensor generation circuit arranges samples of that signal along time, frequency, and diversity dimensions to obtain a composite signal tensor. A set of cascaded least squares estimators then separates the component signals by fitting a constrained tensor model of the composite signal to the composite signal tensor in an alternating least squares estimation process, alternating during any given iteration of the process between fitting different unfolded representations of the constrained tensor model to corresponding unfolded representations of the composite signal tensor. The tensor model models the composite signal as a linear combination of rank-one tensors associated with the component signals, and is constrained in the sense that each rank-one tensor remains constrained according to the spreading of its associated component signal over time. | 06-02-2011 |
Francisco Porto Cavalcanti, Fortaleza-Ce BR
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20100150088 | METHOD AND ARRANGEMENT FOR RESOURCE ALLOCATION - A method for resource allocation in a wireless communication system, having a set of connected terminals, comprises allocating of transmission resources and assigning of transmission resources. The allocating in turn comprises estimating of a requirement value representing an amount of required transmission resources for satisfying a minimum quality of service during a next transmission time interval for respective connected terminal. An allocation subset is generated by including unsatisfied connected terminals so that the sum of the requirement values of the included connected terminals of the allocation subset equals available transmission resources. The generation of the allocation subset is performed by including connected terminals in an order according to the respective requirement values, starting with the lowest requirement value. The assigning of transmission resources is thereafter performed by assigning transmission resources of the next transmission time interval to connected terminals of the allocation subset. | 06-17-2010 |
Francisco Rodrigo P. Cavalcanti, Fortaleza BR
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20130252654 | DYNAMIC RESOURCE SELECTION TO REDUCE INTERFERENCE RESULTING FROM DIRECT DEVICE TO DEVICE COMMUNICATIONS - Systems and methods are disclosed for selecting resources for direct device to device communications in a cellular communication network. Preferably, resources for the direct device to device communications are selected to minimize, or at least substantially reduce, interference that results from the direct device to device communications in the cellular communication network. In one embodiment, a downlink resource of the cellular communication network is selected as a resource for a direct device to device communication link between a first wireless device and a second wireless device if at least one of the first and second wireless devices is less than a predefined threshold radio distance from a closest base station in the cellular communication network. Otherwise, an uplink resource of the cellular communication network is selected as a resource for the direct device to device communication link between the first and second wireless devices. | 09-26-2013 |
20130294296 | DYNAMIC BAND SELECTION FOR INTERFERENCE MINIMIZATION IN DIRECT DEVICE TO DEVICE COMMUNICATIONS - Systems and methods are disclosed for selecting resources for direct device to device (D2D) communications in a cellular communication network. Preferably, resources for the direct D2D communications are selected to minimize, or at least substantially reduce, interference that results from the direct D2D communications in the cellular communication network. In general, either an uplink resource or a downlink resource of the cellular communication network is selected for a direct D2D communication link between a first wireless device and a second wireless device in order to minimize, or at least substantially reduce, interference caused to a third wireless device that uses the same uplink and downlink resources in the same and/or a neighboring cell of the cellular communication network. | 11-07-2013 |
Francisco Rodrigo Porto Cavalcanti, Fortaleza BR
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20130252621 | DYNAMIC RESOURCE SELECTION TO REDUCE INTERFERENCE THAT RESULTS FROM DIRECT DEVICE TO DEVICE COMMUNICATIONS - Systems and methods are disclosed for selecting resources for direct device to device (D2D) communications in a cellular communication network. In one embodiment, a downlink resource is selected as a resource for a direct D2D communication link between a first wireless device and a second wireless device if a base station serving each of the first and second wireless devices is equipped with an interference cancellation receiver and both the first and second wireless devices are less than a predefined threshold radio distance from their serving base station. An uplink resource is selected as a resource for the direct D2D communication link if the base station serving each of the first and second wireless devices is equipped with an interference cancellation receiver and at least one of the first and second wireless devices is more than the predefined threshold radio distance from its serving base station. | 09-26-2013 |
20140133453 | Resource Allocation for Minimum Satisfaction Guarantees in Multi-Service and Multi-Antenna Networks - Radio resource allocation techniques for MIMO systems are disclosed, wherein SDMA groups that should be multiplexed on each frequency chunk in order to maximize the total downlink data rate are selected, while guaranteeing that a specified minimum number of flows from each service have their instantaneous QoS demands fulfilled. The disclosed techniques include an unconstrained maximization procedure, in which resources are initially allocated to data flows for each of several data services, followed by a reallocation procedure in which resources are reallocated to satisfy minimum satisfaction constraints for each data service. | 05-15-2014 |
Francisco R.p. Cavalcanti, Fortaleza BR
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20120294224 | Amplify-and-Forward Relaying in Communication Systems - Improved amplify-and-forward relaying in a communication network is described, including an example network of multiple single-antenna mobile stations, a multi-antenna relay station, and a multi-antenna base station. Bi-directional communication with improved transmission efficiency is enabled by suitable transmit/receive processing at the relay station without drawbacks of current relaying techniques. Linear transmit and receive processing matrices are disclosed, and it is shown that the numbers of antennas at the relay station and the base station can be substantially the same without reducing network capacity, closely matching the performance for low and high signal to noise ratios of current techniques that require the relay station to have twice as many antennas as the base station. | 11-22-2012 |
Francisco R. P. Cavalcanti, Fortaleza BR
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20130267239 | Dynamic Clustering for Coordinated Transmission in Wireless Communication Systems - Systems and methods provide for applying a clustering based assignment algorithm (CbAA) in a telecommunication system. A method includes: receiving strength information for transmission points belonging to an associated Coordinated Multi-Point (CoMP)-cell; determining the clustering subsets, wherein the step of determining the clustering subsets includes: applying a k-means algorithm to the strength information to form K clusters; identifying the cluster associated with each UE; associating a cluster to each transmission point in accordance to a pre-defined rule; and selecting the UEs to be serviced; and reporting the clustering formations. | 10-10-2013 |
Mario Luis Gomes Cavalcanti, Copenhagen DK
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20130272679 | Video Generator System - A computer implemented method and a video generator system (VGS) for generating a video are provided. The VGS acquires video templates from one or more sources and identifies one or more customizable elements in each video template. The VGS presents the video templates to a user device via an interactive interface for enabling selection and individual customization of each video template. The VGS acquires a selection of one or more video templates from the user device and renders the identified customizable elements of the selected video templates to the user device via the interactive interface. The VGS acquires media content for each rendered customizable element of the selected video templates from the user device via the interactive interface. The VGS generates the video by modifying each rendered customizable element of the selected video template using the acquired media content and collating the modified customizable elements of the selected video template. | 10-17-2013 |