公开(公告)号：US09112607B1

公开(公告)日：2015-08-18

申请号：US13835027

申请日：2013-03-15

申请人： ViaSat, Inc.

发明人： Sameep Dave ,  Fan Mo ,  Yuri Zelensky ,  Eric Fowlie

IPC分类号： H04B10/2513 ,  H04B10/61 ,  H04J14/00 ,  H04J14/06

CPC分类号： H04B10/2513 ,  H04B10/25133 ,  H04B10/6161 ,  H04B10/6162 ,  H04J14/002 ,  H04J14/06

摘要： Methods, systems, and devices are described for filtering data from an optical signal to compensate for chromatic dispersion in an optical path. Samples of different polarizations are filtered in the frequency domain with a matched filter by time-sharing a conversion module. The conversion module first converts a set of samples to the frequency domain for filtering when in a Fast Fourier Transform (FFT) configuration and then converts the filtered set of samples back to the time domain when in an Inverse FFT (IFFT) configuration. The size of the FFT in the FFT configuration and of the IFFT in the IFFT configuration is the same as the size of the samples being processed by the conversion module to enable both configurations to be based on a set of constant multipliers. Both configurations may be based on a pipelined architecture to sequentially process the samples in an efficient manner.

摘要翻译： 描述了用于从光信号过滤数据以补偿光路中的色散的方法，系统和装置。 通过分时转换模块，通过匹配滤波器在频域中对不同极化的样本进行滤波。 当处于快速傅里叶变换（FFT）配置中时，转换模块首先将一组采样转换为频域以进行滤波，然后当处于反FFT（IFFT）配置时将滤波后的样本组转换回时域。 FFT配置中的FFT和IFFT配置中的IFFT的大小与转换模块正在处理的样本的大小相同，以使两个配置都可以基于一组常量乘法器。 两种配置可以基于流水线架构，以有效的方式顺序处理样品。