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    • 2. 发明申请
    • APPARATUS AND METHOD FOR VARIABLE FAST FOURIER TRANSFORM
    • 用于可变快速傅立叶变换的装置和方法
    • US20100011046A1
    • 2010-01-14
    • US12517781
    • 2007-06-18
    • Young-Jin MoonHyun-Jae KimKi-Seok KimYoung-Il Kim
    • Young-Jin MoonHyun-Jae KimKi-Seok KimYoung-Il Kim
    • G06F17/14
    • G06F17/142
    • The present invention relates to an apparatus and method for variable fast Fourier transform. According to an embodiment of the present invention, two n-point fast Fourier transform (FFT) processors are used to generate two n-point FFT output data or one 2n-point FFT output data. The one 2n-point input data is alternately input to the two n-point FFT processors. Each of the two n-point FFT processors selects a twiddle factor for the n-point input data or the 2n-point input data and performs fast Fourier transform. A butterfly operation is performed on signals obtained by performing fast Fourier transform on the 2n-point input data signal, and the processed signals are aligned in an output order. According to this structure, it is possible to realize a fast Fourier transform hardware engine that selectively performs multi-frequency allocation in a base station system that supports the multi-frequency allocation.
    • 本发明涉及一种用于可变快速傅里叶变换的装置和方法。 根据本发明的实施例,使用两个n点快速傅里叶变换(FFT)处理器来产生两个n点FFT输出数据或一个2n点FFT输出数据。 一个2n点输入数据交替地输入到两个n点FFT处理器。 两个n点FFT处理器中的每一个为n点输入数据或2n点输入数据选择旋转因子,并执行快速傅里叶变换。 对通过对2n点输入数据信号执行快速傅里叶变换获得的信号执行蝶形运算,并且处理的信号以输出顺序对准。 根据该结构,能够实现在支持多频分配的基站系统中选择性地进行多频分配的快速傅里叶变换硬件引擎。
    • 3. 发明授权
    • Apparatus and method for variable fast fourier transform
    • 用于可变快速傅里叶变换的装置和方法
    • US08510362B2
    • 2013-08-13
    • US12517781
    • 2007-06-18
    • Young-Jin MoonHyun-Jae KimKi-Seok KimYoung-II Kim
    • Young-Jin MoonHyun-Jae KimKi-Seok KimYoung-II Kim
    • G06F17/14
    • G06F17/142
    • The present invention relates to an apparatus and method for variable fast Fourier transform. According to an embodiment of the present invention, two n-point fast Fourier transform (FFT) processors are used to generate two n-point FFT output data or one 2n-point FFT output data. The one 2n-point input data is alternately input to the two n-point FFT processors. Each of the two n-point FFT processors selects a twiddle factor for the n-point input data or the 2n-point input data and performs fast Fourier transform. A butterfly operation is performed on signals obtained by performing fast Fourier transform on the 2n-point input data signal, and the processed signals are aligned in an output order. According to this structure, it is possible to realize a fast Fourier transform hardware engine that selectively performs multi-frequency allocation in a base station system that supports the multi-frequency allocation.
    • 本发明涉及一种用于可变快速傅里叶变换的装置和方法。 根据本发明的实施例,使用两个n点快速傅里叶变换(FFT)处理器来产生两个n点FFT输出数据或一个2n点FFT输出数据。 一个2n点输入数据交替地输入到两个n点FFT处理器。 两个n点FFT处理器中的每一个为n点输入数据或2n点输入数据选择旋转因子,并执行快速傅里叶变换。 对通过对2n点输入数据信号执行快速傅里叶变换获得的信号执行蝶形运算,并且处理的信号以输出顺序对准。 根据该结构,能够实现在支持多频分配的基站系统中选择性地进行多频分配的快速傅里叶变换硬件引擎。
    • 4. 发明授权
    • Method and apparatus for determining timing for initial ranging of user equipment using ranging of adjacent pieces of user equipment in multi-hop mobile relay system
    • 用于使用多跳移动中继系统中的相邻用户设备的测距来确定用户设备的初始测距的定时的方法和装置
    • US08345589B2
    • 2013-01-01
    • US12518246
    • 2007-10-31
    • Hyun-Jae KimYoung-Il Kim
    • Hyun-Jae KimYoung-Il Kim
    • H04B7/14
    • H04W56/002H04B7/2606H04W16/26H04W24/10H04W92/18
    • Provided is a method and apparatus for determining timing for initial ranging of user equipment by using ranging of adjacent pieces of user equipment in a multi-hop mobile relay (MMR) system, and more particularly, a method and apparatus for determining timing for initial ranging of user equipment in which a power value and a timing value for periodic ranging of adjacent pieces of user equipment are measured so as to minimize an uplink timing error of a base station. In the MMR system, user equipment transmits an initial ranging code to the base station with irregular timing while not knowing an exact start point of an uplink of the base station. In particular, if the user equipment attempts the initial ranging at the same time as when adjacent pieces of user equipment attempt the periodic ranging and the handover ranging, an error occurs between transmission timing of the initial ranging and uplink timing, thereby acting as an inter-symbol interference (ISI) and inter-channel interference (ICI) of different ranging. As a result, the initial ranging acts as an interference signal in a ranging process of adjacent pieces of user equipment. However, the apparatus and method can minimize a timing error of the initial ranging code of user equipment by avoiding the initial ranging acting as the interference signal.
    • 提供了一种用于通过使用多跳移动中继(MMR)系统中的相邻用户设备的测距来确定用户设备的初始测距的定时的方法和装置,更具体地,用于确定初始测距的定时的方法和装置 测量用于相邻用户设备的周期性测距的功率值和定时值的用户设备,以使基站的上行链路定时误差最小化。 在MMR系统中,用户设备以不规则的定时向基站发送初始测距码,而不知道基站的上行链路的确切起点。 特别地,如果用户设备在相邻的用户设备尝试周期性测距和切换测距的同时尝试初始测距,则在初始测距和上行链路定时的传输定时之间出现错误, 符号干扰(ISI)和不同范围的信道间干扰(ICI)。 结果,初始测距在相邻的用户设备的测距过程中充当干扰信号。 然而,该装置和方法可以通过避免作为干扰信号的初始测距来最小化用户设备的初始测距码的定时误差。