Jong Heon
Jong Heon Kim, Yongsan-Gu KR
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20080284509 | N-WAY DOHERTY DISTRIBUTED POWER AMPLIFIER - A power amplifier using N-way Doherty structure for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, the present invention uses a dual-feed distributed structure to an N-way Doherty amplifier to improve the isolation between at least one main amplifier and at least one peaking amplifier and, and also to improve both gain and efficiency performance at high output back-off power. Hybrid couplers can be used at either or both of the input and output. In at least some implementations, circuit space is also conserved due to the integration of amplification, power splitting and combining. | 11-20-2008 |
20090285194 | Efficient Peak Cancellation Method for Reducing the Peak-To-Average Power Ratio in Wideband Communication Systems - An efficient peak cancellation method for reducing the peak-to-average power ratio in wideband communication systems uses repeated clipping and frequency domain filtering to achieve a desired peak-to-average power ratio for wideband code division multiple access and orthogonal frequency division multiplexing signals. The maximum magnitude of the filtered pulse is determined by a scaling factor which permits eliminating several iterations while still achieving convergence to the targeted peak-to-average power ratio, thereby reducing computational load and saving hardware resources. This results in improved performance in terms of error vector magnitude, adjacent channel leakage ratio and peak-to-average power ratio. | 11-19-2009 |
Jong Heon Kim, Seoul KR
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20080265996 | Digital Hybrid Mode Power Amplifier System - A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available. | 10-30-2008 |
20090130986 | METHOD OF TRANSMITTING CHANNEL QUALITY INFORMATION IN MOBILE COMMUNICATION SYSTEM - A method of exchanging channel quality information between a base station and a user equipment in a mobile communication system is disclosed. A method of transmitting channel quality information in a mobile communication system which transmits channel quality information from a user equipment to a base station comprises transmitting channel quality information, which is measured based on a signal received from the base station, to the base station, receiving feedback information of the channel quality information from the base station, and transmitting difference information to the base station, the difference information for matching the channel quality information transmitted from the user equipment with channel quality information received by the base station based on the feedback information. | 05-21-2009 |
20120147993 | METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS - In some embodiments, a method of reducing adjacent channel power ratio and compensating memory effects of multi-channel wideband communication systems using multiplexing modulation techniques is provided. The method includes generating an address from samples of a baseband input signal of a communication system. The method also includes retrieving from a memoryless lookup table an entry in accordance with the address. The method further includes pre-equalizing the baseband input signal, the pre-equalization depending on one or more magnitudes of the input signal. The method still further includes multiplying the pre-equalized baseband input signal and the lookup table entry. | 06-14-2012 |
20130315291 | METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS - An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers, to reduce the computational complexity and numerical instability for desired linearity performance with memory effects compensation for wideband transmitter systems. Therefore, the present invention could reduce the computational load, which saves hardware resources in an implementation and improve performance, in terms of adjacent channel power ratio. | 11-28-2013 |
20140327481 | DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM - A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available. | 11-06-2014 |
20150092830 | METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS - An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers. | 04-02-2015 |
Jong Heon Kim, Seongnam-Si KR
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20080203583 | SEMICONDUCTOR PACKAGE AND FABRICATION METHOD THEREOF - There is provided a semiconductor package comprising: a multilayer thin film structure including a plurality of dielectric layers and at least one or more redistribution layers; a semiconductor chip positioned at one side of the multilayer thin film structure and electrically connected to the redistribution layer; and a solder bump formed at the other side of the multilayer thin film structure. The multilayer thin film structure functions as the substrate for the semiconductor package and realizes the light, thin, short and small BGA package without any additional substrate. A plurality of the packages can be simultaneously formed at wafer level or carrier level, to simplify the process and to be favorable for mass production. After the semiconductor chips are formed at wafer level, only the semiconductor chips having the excellent operation characteristic through the test are selectively bonded to the multilayer thin film structure, to provide the high quality package products in which the fault rate is maximally reduced. The light, thin, short and small BGA package according to the present invention enables small and slim communication devices, displayers and other diverse electronic devices, to be contributed to the increase of the competitiveness of the products to which the BGA package is applied. | 08-28-2008 |
Jong Heon Lee, Hwaseong-Si KR
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20110083295 | WIPER BLADE FOR VEHICLE - A wiper blade for a vehicle may include a secondary lever including a lever rivet hole, an adapter including a guide rib formed in the longitudinal direction thereof, a locking projection formed at the rear thereof, and an adapter rivet hole, a primary cover including a guide groove formed in the longitudinal direction thereof and into which the guide rib of the adapter is inserted, and a locking groove into which the locking projection of the adapter is inserted, and a hinge member penetrating the lever rivet hole and the adapter rivet hole and pivotally coupling the adapter and secondary lever. | 04-14-2011 |
20130146248 | HVAC ASSEMBLY FOR VEHICLE - An HVAC assembly for a vehicle is provided that does not require an outward protruding structure so as to form a console vent duct, thus achieving a more compact design, improving a mounting ability on the vehicle, improving a manipulation feeling when selecting each outlet for discharging air, and enhancing sealability between the respective outlets, therefore eventually significantly improving marketability of the vehicle. | 06-13-2013 |
20140134937 | AIR CONDITIONING APPARATUS FOR VEHICLES - An air conditioning apparatus includes an air conditioning housing and a mode door. The air conditioning housing has a discharge chamber through which conditioned air is discharged out of the air conditioning housing. The discharge chamber includes a defrost vent, a main vent, floor vents and a rear seat vent. The floor vents are formed on opposite sides of a rear portion of the air conditioning housing. The rear seat vent is formed between the floor vents. The mode door has a front opening hole which is formed in a front portion of the mode door, a pair of main opening holes which are formed in a rear portion of the mode door at positions spaced apart from each other, and a rear-end opening hole which is formed behind a first portion provided between the main opening holes. | 05-15-2014 |
Jong Heon Lee, Daegu KR
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20100139027 | Wiper Blade - A wiper blade includes a wiper strip for contacting a windshield glass of a vehicle, a lever assembly supporting the wiper strip to squeeze onto the windshield glass, and a cover member containing the lever assembly, wherein the lever assembly includes, a pair of first levers, each with both ends engaged with and point-supporting the wiper strip to form an engaging portion on the wiper strip respectively, and a pair of the second levers, each with one end hinge-coupled to a corresponding one of the first levers and with the other end coupled with the cover member and the wiper strip. | 06-10-2010 |
Jong Heon Lee, Suwon-Si KR
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20120085115 | AIR CONDITIONER FOR VEHICLE - An air conditioner for a vehicle may include an evaporator core, a heater core allowing air which has passed through the evaporator core to selectively pass therethrough, a defrost outlet, a vent outlet formed adjacent to the defrost outlet, a floor outlet formed adjacent to the vent outlet, and a sliding door sliding between the defrost outlet, the vent outlet and the floor outlet in series, thus selectively opening or closing the defrost outlet, the vent outlet and the floor outlet. | 04-12-2012 |
20150183383 | LOW-MELTING ADHESIVE FILM - A low-melting adhesive film may include a first adhesive layer made of a material comprising thermoplastic polyurethane, a second adhesive layer made of a material comprising aromatic-based hot-melt thermoplastic polyurethane capable of being applied to low temperature adhesion at a temperature of 60° C. or higher, and a polyethylene (PE)-based protective film layer. The low-melting adhesive film may be used to adhere a carpet fabric to a sound absorbing material and thus produce an integrated sound absorbing and proofing composite carpet. | 07-02-2015 |
Jong Heon Lee, Seongnam Si KR
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20130260359 | APPARATUS AND METHOD FOR DIAGNOSING LEARNING ABILITY - The present disclosure relates to an apparatus and method for diagnosing a learning ability. The apparatus for diagnosing learning ability includes a receiving unit configured to receive from a terminal chapter-related information or problem-related information which is desirably diagnosed by a learner, and a semantic information generator configured to generate, responsive to each piece of problem information included in the chapter-related information or problem-related information, semantic information with structural information of the problem information, the problem information having subject-specific problem information distinguished from the semantic information. | 10-03-2013 |
Jong Heon Park, Seoul KR
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20130160224 | PARTIALLY AND FULLY EARTH-ANCHORED CABLE-STAYED BRIDGES USING MAIN-SPAN PRESTRESSING UNIT AND METHOD OF CONSTRUCTING THE SAME - Provided are partially and fully earth-anchored cable-stayed bridges, each of which uses a prestressing unit including anchor units and a prestressing member from deck segments installed at its main span such that the prestressing unit serves as a conventional windproof cable and can simultaneously introduce a tensile stress. Thereby, a magnitude of the maximum compressive stress acting on a cross section of each main-span deck segment is reduced, so that it is possible to reduce a cross-sectional area of each main-span deck segment and thus to ensure economical construction. All or part of the compressive stress generated at the main span can be offset by the tensile stress caused by the prestressing member. | 06-27-2013 |
20140149419 | COMPLEX EVENT PROCESSING APPARATUS FOR REFERRING TO TABLE WITHIN EXTERNAL DATABASE AS EXTERNAL REFERENCE OBJECT - Provided is a complex event processing apparatus referring to a table within an external database as an external reference object. The complex event processing apparatus includes a query language analysis unit; a meta information management unit; a query language generation unit; a query language storage unit; and an external interface unit. | 05-29-2014 |
Jong Heon Shim, Gangwon-Do KR
Jong Heon Shin, Daejeon KR
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20100168222 | NOVEL USE OF SARGACHROMENOL - The present invention relates to novel use of sargachromenol, and more particularly, the present invention relates to novel use of sargachromenol for destroying and/or lysing hyperproliferating keratinocyte. Accordingly, since sargachromenol of the present invention has activity in destroying and/or lysing keratinocyte, it may be useful for keratinocyte lysing agents in the skin area where the keratinocytes are hyperproliferating or peeling agents. | 07-01-2010 |