Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering
    8.
    发明授权
    Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering 有权
    在OFDM系统中有效利用使用IFFT的数字上采样进行更简单的模拟滤波

    公开(公告)号:US09042461B2

    公开(公告)日:2015-05-26

    申请号:US11373001

    申请日:2006-03-09

    IPC分类号: H04N7/18 H04L27/26

    CPC分类号: H04L27/2644

    摘要: Systems and methods are provided for transmitting OFDM information via IFFT up-sampling components that transmit data at a higher sampling rate than conventional systems to simplify filter requirements and mitigate leakage between symbols. In one embodiment, an NL point IFFT is performed on a zero inserted set of frequency domain symbols. In another embodiment, the NL point IFFT is further optimized by exploiting the fact that (N−1) L of the frequency domain symbols are zero. This enables an embodiment that consists of a pre-processor that multiplies the input samples by complex phase factors, followed by L point IFFTs.

    摘要翻译: 提供了系统和方法,用于通过IFFT上采样组件传输OFDM信息,该组件以比常规系统更高的采样速率传输数据,以简化滤波器要求并减轻符号之间的泄漏。 在一个实施例中,对零插入的频域符号组执行NL点IFFT。 在另一个实施例中,通过利用频域符号的(N-1)L为零的事实进一步优化NL点IFFT。 这使得能够由预处理器组成的实施例,该预处理器将输入样本乘以复相位因子,随后是L点IFFT。