公开(公告)号：US20050198092A1

公开(公告)日：2005-09-08

申请号：US10790205

申请日：2004-03-02

申请人： Jia-Pei Shen ,  Chien-Meen Hwang ,  Chih Hsueh ,  Orlando Canelones

发明人： Jia-Pei Shen ,  Chien-Meen Hwang ,  Chih Hsueh ,  Orlando Canelones

IPC分类号： G06F17/14 ,  G06F15/00

CPC分类号： G06F17/142

摘要： An FFT circuit is implemented using a radix-4 butterfly element and a partitioned memory for storage of a prescribed number of data values. The radix-4 butterfly element is configured for performing an FFT operation in a prescribed number of stages, each stage including a prescribed number of in-place computation operations relative to the prescribed number of data values. The partitioned memory includes a first memory portion and a second memory portion, and the data values for the FFT circuit are divided equally for storage in the first and second memory portions in a manner that ensures that each in-place computation operation is based on retrieval of an equal number of data values retrieved from each of the first and second memory portions.

摘要翻译： 使用基数-4蝶形元件和分区存储器来实现FFT电路，用于存储规定数量的数据值。 基数-4蝶形元件被配置为执行规定数量级的FFT运算，每个级包括相对于规定数量的数据值的规定数量的就地计算操作。 分区存储器包括第一存储器部分和第二存储器部分，并且以确保每个就地计算操作基于检索的方式将用于FFT电路的数据值均等地分配以存储在第一和第二存储器部分中 从第一和第二存储器部分中的每一个检索的相等数量的数据值。

公开(公告)号：US07251273B2

公开(公告)日：2007-07-31

申请号：US10367865

申请日：2003-02-19

申请人： Chien-Meen Hwang ,  Ping Hou ,  Jia-Pei Shen

发明人： Chien-Meen Hwang ,  Ping Hou ,  Jia-Pei Shen

IPC分类号： H03H7/30

CPC分类号： H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

摘要： A channel estimator, configured for supplying equalization coefficients to a frequency equalizer, is configured for determining equalizer coefficients for a received wireless signal based on a minimum equalization error-based estimation. The channel estimator is configured for identifying first and second long preambles from the received wireless signal, determining an equalization coefficient for a selected frequency based on a minimized cost function for the first and second long preambles relative to a prescribed preamble value for the selected frequency, and supplying the equalization coefficient for the selected frequency to a frequency equalizer for equalization of the received wireless signal.

摘要翻译： 配置用于向频率均衡器提供均衡系数的信道估计器被配置用于基于最小均衡误差估计来确定所接收的无线信号的均衡器系数。 信道估计器被配置用于从接收的无线信号识别第一和第二长前导码，基于针对所选频率的规定前导码，基于用于第一和第二长前导码的最小化成本函数来确定所选频率的均衡系数， 并将所选择的频率的均衡系数提供给频率均衡器，以便均衡所接收的无线信号。