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公开(公告)号：US20170141482A1
公开(公告)日：2017-05-18
申请号：US15209951
申请日：2016-07-14
Inventor： Gwang Moon PARK , Haeng Sook RO , Sang In CHO , Yong Seok CHOI
Abstract: Disclosed are a variable antenna and an apparatus for detecting a radio signal. The variable antenna includes: a first receiving unit including at least one liquid metal antenna element; a second receiving unit including at least one liquid metal antenna element having a length different from a length of the first receiving unit; and a gain control unit configured to electrically adjust lengths of the liquid metal antenna elements for one of the first receiving unit and the second receiving unit according to the frequency of a received signal, wherein each antenna array realized by the liquid metal antenna elements of the first receiving unit and the second receiving unit is arranged in a single bay.
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2.发明申请APPARATUS AND METHOD OF CALCULATING AVAILABLE CHANNELS CONSIDERING PRIORITY IN TVWS 有权计算TVWS中优先考虑的可用通道的装置和方法
公开(公告)号：US20140171072A1
公开(公告)日：2014-06-19
申请号：US13898863
申请日：2013-05-21
Inventor： Kyu Min KANG , Sang In CHO , Jae Cheol PARK , Byung Jang JEONG
IPC: H04W48/16
Abstract: Disclosed are an apparatus and a method of calculating available channels considering a priority in a TVWS. An apparatus for calculating available channels considering a priority in a TVWS according to the present invention includes: a communication module configured to receive a request for information on usable available channels from a TV Band Device (TVBD); an available channel calculation unit configured to calculate one or more available channels usable by the TVBD based on one or more predetermined reference parameters according to the request; a priority assignment unit configured to assign a priority to each of the calculated available channels, generate an available channel list including the available channels to which the priorities are assigned, and provide the TVBD with the generated available channel list; and a database configured to store the available channels, to which the priorities are assigned, calculated for each TVBD.
Abstract translation: 公开了考虑TVWS中的优先级来计算可用信道的装置和方法。 根据本发明的考虑TVWS中的优先级的可用信道的计算装置包括：通信模块，被配置为从TV频带设备（TVBD）接收关于可用可用信道的信息的请求; 可用信道计算单元，被配置为根据所述请求计算基于一个或多个预定参考参数的TVBD可用的一个或多个可用信道; 优先级分配单元，被配置为为每个所计算的可用信道分配优先级，生成包括优先级被分配到的可用信道的可用信道列表，并向TVBD提供生成的可用信道列表; 以及被配置为存储为每个TVBD计算优先级被分配到的可用信道的数据库。
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公开(公告)号：US20230074122A1
公开(公告)日：2023-03-09
申请号：US17554364
申请日：2021-12-17
Inventor： Hyung Jung KIM , Min Soo KANG , Sang In CHO
IPC: G01S7/28 , G01S13/933 , G01S13/42
Abstract: Disclosed is a method and apparatus for generating a radar signal, in which performance of radar detection is ensured while increasing a spectrum efficiency in a radar network. The method comprises generating a set of frequency-modulation waveforms, generating an orthogonal code set, generating a set of coded frequency-modulation waveforms through element operation between the set of frequency-modulation waveforms and the orthogonal code set, calculating an objective function for the set of frequency-modulation waveforms with regard to a different set of coded frequency-modulation waveforms and previous sets of coded frequency-modulation waveforms, and selecting a current polyphase code set as an optimized polyphase code set when a result of current calculation is better or smaller than a result of previous iteration, and performing phase perturbation by replacing an element randomly selected in the current polyphase code set selected as the optimized polyphase code set with another admissible-phase element.
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公开(公告)号：US20150257017A1
公开(公告)日：2015-09-10
申请号：US14599733
申请日：2015-01-19
Inventor： Sang In CHO , Kyu Min KANG , Jae Cheol PARK , Byung Jang JEONG
IPC: H04W24/02
CPC classification number: H04W16/18
Abstract: Disclosed is a method for calculating a radio coverage in a wireless device for calculating a protective distance so as not to allow a secondary user sharing a frequency with a primary user to have an effect of radio interference on the primary user, the method including: calculating a transmission power of a wireless signal transmitted through the frequency by the secondary user; determining a region affected by the wireless signal based on the transmission power of the secondary user; calculating an average ground clearance of the determined region; calculating a height of an installation place of an antenna of the secondary user from the average ground clearance; and calculating the height of the antenna from the average ground clearance by adding a length of the antenna of the secondary user to the calculated height and calculating the radio coverage based on the height from the average ground clearance.
Abstract translation: 公开了一种用于计算无线设备中用于计算保护距离的无线电覆盖的方法，以便不允许与主用户共享频率的次要用户对主用户具有无线电干扰的影响，该方法包括：计算 通过次要用户通过频率发送的无线信号的发送功率; 基于所述次要用户的发送功率来确定受所述无线信号影响的区域; 计算确定区域的平均离地间隙; 从平均离地间隙计算二次用户的天线的安装位置的高度; 以及通过将所述次要用户的天线的长度与计算出的高度相加来计算所述天线的高度，并且基于距所述平均离地间隙的高度计算所述无线电覆盖。
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5.发明申请AVAILABLE CHANNEL INFORMATION SHARING SYSTEM AND AVAILABLE CHANNEL INFORMATION SHARING METHOD 有权可用的频道信息共享系统和可用的频道信息共享方法
公开(公告)号：US20150312770A1
公开(公告)日：2015-10-29
申请号：US14694196
申请日：2015-04-23
Inventor： Kyu Min KANG , Jae Cheol PARK , Byung Jang JEONG , Sang In CHO
Abstract: Disclosed are an available channel information sharing system and an available channel information sharing method, and an available channel information sharing system and an available channel information sharing method based on positional information and area information.The available channel information sharing system sharing available channel information for each unit region includes: a server; a white band device placed in the unit region; and a white band sensing device creating positional information and transmitting the created positional information to the server, receiving unit region information corresponding to the positional information from the server, and transmitting first available channel information based on channel information of a sensed broadcasting signal to the white band device.
Abstract translation: 公开了一种可用的信道信息共享系统和可用的信道信息共享方法，以及基于位置信息和区域信息的可用信道信息共享系统和可用信道信息共享方法。 每个单元区域可用的信道共享系统共享可用信道信息包括：服务器; 放置在单元区域中的白带装置; 以及白带感测装置，其创建位置信息并将所创建的位置信息发送到服务器，从服务器接收与位置信息相对应的接收单元区域信息，并且基于感测到的广播信号的信道信息向白色发送第一可用信道信息 带设备。
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6.发明申请
公开(公告)号：US20140179247A1
公开(公告)日：2014-06-26
申请号：US14140595
申请日：2013-12-26
Inventor： Sang In CHO , Kyu Min KANG , Jae Cheol PARK , Byung Jang JEONG
IPC: H04B1/04
CPC classification number: H04B1/04 , H04B1/0067 , H04H20/61 , H04N5/38 , H04N21/43637 , H04W52/242
Abstract: Provided is an apparatus and method for controlling a transmission output of a radio device using a television (TV) band based on a frequency band, the apparatus including a frequency band selecting unit to select frequency bands to be compared, a radio wave attenuation calculation unit to calculate a radio wave attenuation for each of the selected frequency bands, and a transmission output control unit to automatically control the transmission output of the radio device using a TV band based on a difference value among the calculated attenuation values. According to an example embodiment, it is possible to extend a service area while sufficiently protecting a service being provided in the TV band, thereby realizing an efficient use of frequency resources.
Abstract translation: 提供一种用于基于频带来控制使用电视（TV）频带的无线电设备的发送输出的装置和方法，该装置和方法包括：频带选择单元，用于选择要比较的频带;无线电波衰减计算单元 以计算每个所选频带的无线电波衰减;以及发送输出控制单元，用于基于所计算的衰减值中的差值自动控制使用TV频带的无线电设备的发送输出。 根据示例实施例，可以在充分保护在TV频带中提供的服务的同时扩展服务区域，从而实现频率资源的有效利用。
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公开(公告)号：US20240125893A1
公开(公告)日：2024-04-18
申请号：US18078690
申请日：2022-12-09
Inventor： Hyung Jung KIM , Min Soo KANG , Sang In CHO
IPC: G01S7/02
CPC classification number: G01S7/0232
Abstract: The present disclosure provides a radar apparatus capable of suppressing a radar-to-radar in-band interference caused by a signal derived from another radar apparatus in a radar system in which a plurality of radar apparatuses share frequency resource to increase a frequency utilization efficiency. The radar apparatus includes: a receiver configured to acquire a received signal; a plurality of matched filters arranged in parallel to filter the receive signal, each corresponding to respective one of the plurality of radar apparatus to use a transmit signal of a corresponding radar apparatus as a reference signal; and a signal reconstructor configured to select a matched filter most adequate for an interference suppression based on outputs of the plurality of matched filters, subtract the reference signal of a selected matched filter at least partially from the receive signal, and reconstruct a desired echo signal to be used to determine a target.
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公开(公告)号：US20150245170A1
公开(公告)日：2015-08-27
申请号：US14601376
申请日：2015-01-21
Inventor： Sang In CHO , Sung Jin YOO , Byung Jang JEONG
CPC classification number: H04W4/029
Abstract: Disclosed are an apparatus and a method for securing an available frequency that secure a frequency in a communication area set so as not to overlap with a service protection area of a primary user as an available frequency to prevent interference with the primary user even in the case of communicating with a frequency sharing wireless apparatus without a positioning function.To this end, the apparatus for securing an available frequency includes: a storage unit storing positional information regarding a primary user protection area and information on a frequency for each communication area; a positioning unit measuring a current position; and a control unit calculating a spacing distance from the primary user protection area based on the current position measured by the positioning unit and securing a frequency which does not exceed the calculated spacing distance as an available frequency.
Abstract translation: 公开了一种用于确保可用频率的装置和方法，其将通信区域中的频率设置为不与主用户的服务保护区域重叠为可用频率，以防止对主用户的干扰，即使在这种情况下 与无定位功能的频率共享无线装置进行通信。 为此，用于确保可用频率的装置包括：存储单元，其存储关于主用户保护区域的位置信息和关于每个通信区域的频率的信息; 测量当前位置的定位单元; 以及控制单元，基于由所述定位单元测量的当前位置计算与所述主用户保护区域的间隔距离，并将不超过所计算的间隔距离的频率确保为可用频率。
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9.发明申请METHOD OF ALLOCATING RADIO RESOURCES AND APPARATUS OF ALLOCATING RADIO RESOURCES IN COGNITIVE RADIO SMALL-CELL NETWORKS 有权分配无线电资源的方法和在无线电小型网络中分配无线电资源的设备
公开(公告)号：US20150208422A1
公开(公告)日：2015-07-23
申请号：US14268582
申请日：2014-05-02
Inventor： Jae Cheol PARK , Kyu Min KANG , Sang In CHO , Dong Hun LEE , Byung Jang JEONG
CPC classification number: H04W72/082 , H04W16/16 , H04W52/241 , H04W52/243 , H04W52/244 , H04W52/265 , H04W52/267 , H04W52/346
Abstract: Disclosed is a method of allocating radio resources, including: acquiring available channel information of a cognitive radio small cell; analyzing a channel characteristic based on the available channel information and dividing a required transmission rate of the cognitive radio small cell into required transmission rates for each available channel; and performing a power control for each available channel based on the divided required transmission rates for each available channel. The method of allocating radio resources may be performed under an interference environment in which a plurality of cognitive radio small cells is present and the plurality of cognitive radio small cells shares an available channel.
Abstract translation: 公开了一种分配无线电资源的方法，包括：获取认知无线电小区的可用信道信息; 基于所述可用信道信息分析信道特性并将所述认知无线电小区的所需传输速率划分为每个可用信道的所需传输速率; 并且基于每个可用信道的所划分的所需传输速率对每个可用信道执行功率控制。 分配无线电资源的方法可以在其中存在多个认知无线电小小区并且多个认知无线电小区分享可用信道的干扰环境下执行。
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公开(公告)号：US20130184025A1
公开(公告)日：2013-07-18
申请号：US13717685
申请日：2012-12-17
Inventor： Sang In CHO , Kyu Min KANG , Byung Jang JEONG
IPC: H04W72/04
CPC classification number: H04W72/0453 , H04L27/0006 , H04W16/14 , H04W52/244 , H04W52/283 , H04W72/00
Abstract: Provided is a white space use system using a connection recognition signal, which is associated with technology that enables white space devices to search for and to use an available frequency band in a digital broadcasting system. In particular, provided is a white space use system using a connection recognition signal that enables even devices incapable of autonomously searching for an available channel to safely use a white space in interaction with white space devices.
Abstract translation: 提供了一种使用连接识别信号的白色空间使用系统，其与能够使空白设备在数字广播系统中搜索和使用可用频带的技术相关联。 特别地，提供了一种使用连接识别信号的白色空间使用系统，其能够使得能够自主地搜索可用信道的装置能够安全地使用与空白设备交互的空白空间。
