Patent application number | Description | Published |
20080205502 | APPARATUS FOR MEASURING IQ IMBALANCE - The present general inventive concept relates to apparatuses and/or methods for measuring an IQ imbalance. In one embodiment, a detector can measure an error caused by an IQ imbalance using a first IQ signal including a desired signal and a corresponding image signal by the IQ imbalance. The detector can include a derotator to derotate the first IQ signal by a first angular frequency to obtain a second IQ signal and derotate the first IQ signal by a second angular frequency to obtain a third IQ signal, a DC estimator to obtain a fourth IQ signal corresponding to a DC component of the second IQ signal and a fifth IQ signal corresponding to a DC component of the third IQ signal and a controller can determine a gain error or a phase error from the fourth IQ signal and the fifth IQ signal. | 08-28-2008 |
20080212662 | APPARATUS FOR MEASURING IQ IMBALANCE - The present general inventive concept relates to apparatuses and/or methods for measuring an IQ imbalance. In one embodiment, a signal generator can provide a first IQ signal of a DC component during a first period and the first IQ signal of a first angular frequency during a second period, an IQ up-conversion mixer can up-convert the first IQ signal by a second angular frequency during the first period and up-convert the first IQ signal by a third angular frequency during the second period to output a second IQ signal, an IQ down-conversion mixer can down-convert the second IQ signal by the third angular frequency to output a third IQ signal and an IQ imbalance detector can obtain a first IQ imbalance (e.g., Rx IQ imbalance) from the third IQ signal during the first period and a second IQ imbalance (e.g., Tx/Rx IQ imbalance) during the second period. | 09-04-2008 |
20080252377 | Low noise amplifier having improved linearity - Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor having a first terminal coupled to a second terminal of the first transistor, an envelope detector to output a control signal corresponding to a characteristic of the input signal and an envelope amplifier to amplify the control signal to be applied to a control terminal of the second transistor. | 10-16-2008 |
20080252383 | Phase locked loop and method for compensating temperature thereof - Embodiments of a phase lock loop and a method for compensating a temperature thereof can output an initial tuning digital value for a voltage controlled oscillator configured to output a desired phase lock loop frequency compensated according to a temperature change. Embodiments of a phase lock loop and a method for compensating a temperature thereof can simultaneously perform a digital coarse tuning and an analog fine tuning to compensate for a temperature in a limited time. | 10-16-2008 |
20080253277 | OFDM receiving circuit having multiple demodulation paths using oversampling analog-to-digital converter - Embodiments according to the application relates to an OFDM (orthogonal frequency division multiplexing) receiving circuit and methods thereof configured to have a plurality of demodulation paths for an oversampling ADC, which can increase or improve an overall performance of the circuit. | 10-16-2008 |
20080253470 | OFDM receiving circuit having multiple demodulation paths - Embodiments according to the application relate to an OFDM (orthogonal frequency division multiplexing) receiving circuit and methods thereof configured to have a plurality of demodulation paths, which can increase or improve a performance of an ADC and/or a filter. | 10-16-2008 |
20090028231 | APPARATUS FOR MEASURING IQ IMBALANCE - The present invention relates to an apparatus and a method for measuring an IQ imbalance. One embodiment according to the present general inventive concept can provide a method for measuring a Tx IQ imbalance generated in an IQ up-conversion mixer and an Rx IQ imbalance generated in an IQ down-conversion mixer, that includes measuring a first IQ imbalance corresponding to a first combination of the Rx IQ imbalance with the Tx IQ imbalance, measuring a second IQ imbalance corresponding to a second combination of the Rx IQ imbalance with the Tx IQ imbalance and obtaining the Tx IQ imbalance and the Rx IQ imbalance from the first IQ imbalance and the second IQ imbalance. | 01-29-2009 |
20140112418 | RECEIVER USING IMPEDANCE SHAPING - A receiver includes a mixer configured to convert a radio frequency (RF) signal into a baseband, an impedance shaping unit configured to shape a magnitude of load impedance seen in an output terminal of the mixer in a frequency band of an interference signal converted into the baseband so as to reduce the magnitude of the load impedance, and a trans-impedance amplifier configured to amplify the signal converted into the baseband. | 04-24-2014 |
20140223232 | MOBILE TERMINAL AND METHOD FOR MANAGING THE FILE SYSTEM THEREOF - A mobile terminal and a method for managing a file system thereof are provided. The method of managing a file system of a mobile terminal having a battery cover and a battery cover coupling unit includes sensing an interruption of contact at a portion of a contact area between the battery cover and the battery cover coupling unit, generating a metadata list including metadata on data to be synchronized from among data cached in a volatile memory, after the sensing of the interruption of contact at the preset portion, sensing an interruption of contact at another portion of the contact area between the battery cover and the battery cover coupling unit after the previous sensing, and storing the metadata of the metadata list in a non-volatile memory, if the interval between the sensing operations is less than or equal to a threshold value. | 08-07-2014 |
20140359184 | METHOD AND APPARATUS FOR ALLOCATING INTERRUPTIONS - The present disclosure relates to a method and an apparatus for allocating interruptions in a multi-core system. A method for allocating interruptions in a multi-core system according to one embodiment of the present disclosure comprises: an interrupt load extraction step of extracting interrupt loads of each interruption type; a step of extracting task loads of each core; a weighting factor determination step of determining weighting factors using a difference between task loads of the cores; a step of reflecting weighting factors to extract a converted value of the interrupt load; and an interruption allocation step of allocating interruption types to the cores such that the sums of the converted values of the interrupt loads allocated to each core and the allocated task loads are uniform. According to one embodiment of the present disclosure, interruptions can be allocated such that both task processing and interruption processing can be performed in an efficient manner. | 12-04-2014 |
20150019196 | ARITHMETIC UNIT INCLUDING ASIP AND METHOD OF DESIGNING SAME - In order to achieve tasks, according to an embodiment of the present invention, an arithmetic unit including one or more ASIPs includes two or more processors, and an execution unit that is connected to the two or more processors and executes instructions received from the processors. According to an embodiment of the present invention, it is possible to provide a low-power, high-integration, high-performance arithmetic unit through resource sharing using the arithmetic unit including the one or more ASIPs, and it is possible to provide a method of designing an arithmetic unit that may be applied to a specific application. | 01-15-2015 |
20150269051 | DEVICE AND METHOD FOR EVALUATING SYSTEM PERFORMANCE - A device and a method for evaluating the performance of a system on the basis of a user experience are disclosed. To this end, experience information of a user according to the driving of an embedded system is collected on the basis of a predetermined or preset condition, and a scenario selection condition is set in order to select a scenario for evaluating the performance of the embedded system. An experience pattern of the user is analyzed by requisite experience information obtained from the collected experience information on the basis of the set scenario selection condition, and an optimal scenario for evaluating the performance of the embedded system is selected among a plurality of available scenarios on the basis of the results according to the analysis, thereby evaluating the performance of the embedded system using the selected scenario. | 09-24-2015 |