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    • 12. 发明授权
    • Apparatus and method for optimally compensating for imbalance between in-phase and quadrature-phase in a zero-IF OFDM receiver
    • 用于最佳地补偿零中频OFDM接收机中的同相和正交相位之间的不平衡的装置和方法
    • US07609772B2
    • 2009-10-27
    • US11148179
    • 2005-06-09
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • H04L27/28
    • H04L27/2649H04L25/061H04L2027/0016
    • An optimum I/Q imbalance compensating apparatus and method in a zero-IF OFDM receiver. In the apparatus, a first compensator generates a first symbol by removing interference from a second distorted symbol on an (Ns−m+1)th subcarrier from a first distorted symbol on an mth subcarrier by a first compensation coefficient in an OFDM FFT signal of Ns subcarriers. A first hard decider generates a first compensated symbol by hard-decision on the first symbol, an error calculator generates an error symbol by subtracting the first received symbol from the first compensated symbol. A second compensator generates a second symbol by eliminating interference from the first distorted symbol from the second distorted symbol using a second compensation coefficient. A second hard decider generates a second compensated symbol by hard-decision on the second symbol, and an adaptive controller updates the first compensation coefficient using the error symbol and the second compensation symbol.
    • 零中频OFDM接收机中的最佳I / Q不平衡补偿装置和方法。 在该装置中,第一补偿器通过在第(Ns-m + 1)个子载波上从第N个副载波上的第一失真符号中的第二失真符号除去干扰,产生第一符号,第一补偿系数在OFDM FFT信号中的第一补偿系数 Ns副载波。 第一硬判决器通过对第一符号进行硬判决来生成第一补偿符号,误差计算器通过从第一补偿符号减去第一接收符号来生成误差符号。 第二补偿器通过使用第二补偿系数消除来自第二失真符号的来自第一失真符号的干扰来产生第二符号。 第二硬判定器通过第二符号上的硬判决产生第二补偿符号,并且自适应控制器使用误差符号和第二补偿符号来更新第一补偿系数。
    • 13. 发明申请
    • Apparatus and method for improving channel change speed in digital broadcasting reception terminal
    • 数字广播接收终端提高频道切换速度的装置及方法
    • US20070195204A1
    • 2007-08-23
    • US11588579
    • 2006-10-27
    • Ji-Won Ha
    • Ji-Won Ha
    • H04N5/50
    • H04N5/50H04N5/4401H04N21/434H04N21/4348H04N21/4384H04N21/64315
    • Disclosed are an apparatus and a method for decreasing a channel change time in a digital broadcasting reception terminal. Starting time information of at least one non-reference channel is selected. When the user selects a non-reference channel, broadcast data thereof is received by using the collected starting time information. The apparatus extracts time offset values between a starting time of a current reference channel and that of each at least one non-reference channel, and then obtains the starting time of each non-reference channel by using the extracted time offset values. When a channel change is performed, the starting time of the non-reference channel is established to receive broadcast data based on the starting time according to a corresponding time offset value. Hence, a time period required for a channel change is significantly reduced.
    • 公开了一种减少数字广播接收终端中的频道改变时间的装置和方法。 选择至少一个非参考信道的开始时间信息。 当用户选择非参考频道时,通过使用所收集的开始时间信息来接收其广播数据。 该装置提取当前参考信道的起始时间和每个至少一个非参考信道的起始时间之间的时间偏移值,然后通过使用提取的时间偏移值来获得每个非参考信道的开始时间。 当执行频道改变时,建立非参考频道的开始时间,以根据相应的时间偏移值根据开始时间接收广播数据。 因此,频道改变所需的时间段显着减少。
    • 17. 发明授权
    • Apparatus and method for receiving packet data control channel in a mobile communication system
    • 用于在移动通信系统中接收分组数据控制信道的装置和方法
    • US07487430B2
    • 2009-02-03
    • US10397522
    • 2003-03-27
    • Se-Hyoung KimWoo-Sang HongJi-Won HaSang-Min BaeJin-Woo HeoSoo-Bok Yeo
    • Se-Hyoung KimWoo-Sang HongJi-Won HaSang-Min BaeJin-Woo HeoSoo-Bok Yeo
    • H03M13/00H03M13/03H03D1/00
    • H04L1/0046H04L1/0054H04L1/0068H04L1/0071H04L1/08H04L1/1812
    • An apparatus and method for receiving control information transmitted from a transmitter using one of a plurality of slot lengths in a high-speed packet transmission mobile communication system is provided. The apparatus and method includes a decoder adapted to receive symbols by the slot, and generate at least one bit stream by decoding as many symbols of at least one possible slot length among a plurality of slot lengths according to a previous decoding result. An error checker adapted to perform error checking on the bit stream from the decoder. A controller is adapted to provide symbols of one more consecutive slot to the decoder, if the error checking failed, and acquire control information from the error checking-passed bit stream, if the error check passed. The decoder is further adapted to output at least one frame quality metric for the bit stream along with the bit stream. If the number of error checking-passed bit streams is larger than or equal to 2, the controller compares frame quality metrics for the bit streams and selects one bit stream having the maximum frame quality metric in order to acquire the control information.
    • 提供一种用于在高速分组传输移动通信系统中接收从发射机发送的多个时隙长度之一的控制信息的装置和方法。 该装置和方法包括一个适于通过时隙接收符号的解码器,并且通过根据先前的解码结果解码多个时隙长度中的至少一个可能的时隙长度的多个符号来生成至少一个比特流。 一个错误检查器,适用于从解码器对比特流执行错误检查。 如果错误检查失败,则控制器适于向解码器提供一个连续时隙的符号,并且如果通过了错误检查,则从错误检查传递的比特流中获取控制信息。 解码器还适用于与位流一起输出比特流的至少一个帧质量度量。 如果错误检查传递的比特流的数量大于或等于2,则控制器比较比特流的帧质量度量并选择具有最大帧质量度量的一个比特流,以便获取控制信息。
    • 18. 发明申请
    • APPARATUS AND METHOD FOR HANDOVER OF DIGITAL BROADCASTING RECEPTION TERMINAL
    • 用于切换数字广播接收终端的装置和方法
    • US20080031195A1
    • 2008-02-07
    • US11835286
    • 2007-08-07
    • Ji-Won HA
    • Ji-Won HA
    • H04Q7/00
    • H04H20/22
    • Disclosed is a method for a handover of a digital broadcasting reception terminal employing a time division multiplexing scheme, which periodically receives broadcast data through each of one or more broadcasting channels provided in a predetermined frequency band, the method including the steps of: when broadcast data of a channel selected by a user in a current cell is received, detecting handover determination information from the received broadcast data; determining if it is necessary to perform a handover to an adjacent cell by using the handover determination information; searching channels provided by the cell to which the terminal will be handed over for a channel providing broadcast data equal to that provided by the selected channel, when it is determined that it is necessary to perform a handover; and when a channel providing broadcast data equal to that of the selected channel is found, performing a handover to a corresponding cell and receiving broadcast data of the found channel. Accordingly, the digital broadcasting reception terminal employing the time division multiplexing scheme can quickly and stably perform a handover, so that the user can view a seamless broadcast although he/she moves from a current cell to an adjacent cell which uses a frequency and/or broadcast data reception time point different from that of the current cell.
    • 公开了一种采用时分复用方式的数字广播接收终端的切换方法,该方式通过在预定频带中提供的一个或多个广播信道中的每一个周期性地接收广播数据,该方法包括以下步骤:当广播数据 接收当前小区中由用户选择的频道,从所接收的广播数据中检测切换确定信息; 确定是否需要通过使用切换确定信息来执行到相邻小区的切换; 当确定需要执行切换时,搜索由终端将切换到的小区提供的用于提供等于由所选择的信道提供的广播数据的信道的信道; 并且当找到提供与所选频道的广播数据相等的广播数据的频道时,执行切换到对应的小区并接收所找到的频道的广播数据。 因此,采用时分多路复用方式的数字广播接收终端可以快速且稳定地执行切换,从而即使他/她从当前小区移动到使用频率和/或频率的相邻小区,用户也可以观看无缝广播 广播数据接收时间点与当前小区不同。
    • 20. 发明申请
    • Synchronization method and apparatus of moving picture experts group transport stream for reducing initial delay
    • 运动图像专家组同步方法和装置,用于减少初始延迟
    • US20070064814A1
    • 2007-03-22
    • US11521599
    • 2006-09-15
    • Sung-Jin ParkJi-Won HaJin-Wook Han
    • Sung-Jin ParkJi-Won HaJin-Wook Han
    • H04B1/66
    • H04N21/4382H04L7/042H04N21/2389H04N21/4385
    • A method and apparatus for synchronization of a moving picture experts group (MPEG) transport stream, which minimizes an initial delay are provided. A packet synchronization unit and a mode of the packet synchronization unit to are initialized to “0”. Values of sync words are stored by shifting values of a sync word register when the sync words have been received and the received sync word is compared with predetermined code words As a result of the comparison, a determination is made as to whether a bit difference between the sync words and the predetermined code words exceeds a predetermined threshold value. A verification is then made as to whether all bits of the sync words correspond to all bits of the predetermined code words, when it is determined as a result of the determination that the bit difference is less than or equal to the predetermined threshold value and the MPEG transport stream is descrambled before returning to step of storing values of sync words by shifting values of a sync word register.
    • 提供了使初始延迟最小化的运动图像专家组(MPEG)传输流的同步的方法和装置。 分组同步单元和分组同步单元的模式被初始化为“0”。 同步字的值通过移位同步字寄存器的值而被存储,同步字已经被接收并且接收到的同步字与预定的码字进行比较作为比较的结果,确定是否有位差 同步字和预定码字超过预定阈值。 然后,当作为确定比特差小于或等于预定阈值的结果确定同步字的所有比特是否对应于预定码字的所有比特时进行验证,并且 在转移同步字寄存器的值的同步字存储值的步骤之前,将MPEG传输流解扰。