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    • 5. 发明申请
    • APPARATUS AND METHOD FOR FAST FOURIER TRANSFORM/INVERSE FAST FOURIER TRANSFORM
    • 快速傅里叶变换/反相快速傅里叶变换的装置和方法
    • US20100149963A1
    • 2010-06-17
    • US12543842
    • 2009-08-19
    • Hyoung Oh BAEDae Ho KIMYeong Jin KIM
    • Hyoung Oh BAEDae Ho KIMYeong Jin KIM
    • H04J11/00
    • G06F17/142
    • An FFT/IFFT apparatus and method are provided. The FFT/IFFT apparatus includes a storage unit, a first FFT/IFFT unit, a second FFT/IFFT unit, and a third FFT/IFFT unit. The storage unit has as many addresses as the number of bits of input data. The first FFT/IFFT unit sequentially stores half of the input data in the storage unit, performs a first-point FFT/IFFT operation while sequentially receiving the other half of the input data, and stores the first-point FFT/IFFT operation result in the storage unit. The second FFT/IFFT unit performs a second-point FFT/IFFT operation on the first-point FFT/IFFTed data, and stores the second-point FFT/IFFT operation result in the storage unit. The third FFT/IFFT unit performs a third-point FFT/IFFT operation on the second-point FFT/IFFTed data, and stores the third-point FFT/IFFT operation result in the storage unit.
    • 提供FFT / IFFT装置和方法。 FFT / IFFT装置包括存储单元,第一FFT / IFFT单元,第二FFT / IFFT单元和第三FFT / IFFT单元。 存储单元具有与输入数据的位数一样多的地址。 第一FFT / IFFT单元顺序地将输入数据的一半存储在存储单元中,在顺序地接收输入数据的另一半的同时执行第一点FFT / IFFT操作,并将第一点FFT / IFFT运算结果存储在 存储单元。 第二FFT / IFFT单元对第一点FFT / IFFT数据执行二点FFT / IFFT运算,并将第二点FFT / IFFT运算结果存储在存储单元中。 第三FFT / IFFT单元对第二点FFT / IFFTed数据执行第三点FFT / IFFT操作,并将第三点FFT / IFFT运算结果存储在存储单元中。
    • 7. 发明申请
    • RECEIVING APPARATUS IN OFDM SYSTEM AND RECEIVING METHOD
    • OFDM系统接收装置和接收方法
    • US20130243130A1
    • 2013-09-19
    • US13588361
    • 2012-08-17
    • Young Ha LEEHye Kyung JWADae Ho KIM
    • Young Ha LEEHye Kyung JWADae Ho KIM
    • H04L27/06
    • H04L27/2647H04L25/022H04L25/0222H04L25/0232
    • Disclosed are a receiving apparatus and a receiving method. More particularly, disclosed are a receiving apparatus and a receiving method in an OFDM system. The receiving apparatus in the OFDM system includes a receiver for receiving wireless signals transmitted through wireless channels, a transformer for transforming the wireless signals into signals of a frequency domain, an inverse transformer for inversely transforming reference signals into signals of a time domain based on a number of reference signals included in the signals of the frequency domain and an arrangement interval of the reference signals included in the signals of the frequency domain, and a determiner for determining a delay spread based on the inversely transformed signals of the time domain.
    • 公开了一种接收装置和接收方法。 更具体地,公开了OFDM系统中的接收装置和接收方法。 OFDM系统中的接收装置包括用于接收通过无线信道发送的无线信号的接收机,用于将无线信号变换为频域的信号的变换器,用于将参考信号反向变换为时域信号的逆变换器,其基于 包括在频域的信号中的参考信号的数量和包括在频域的信号中的参考信号的布置间隔,以及用于基于时域的逆变换信号确定延迟扩展的确定器。