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    • 8. 发明申请
    • SPARSE CHANNEL ESTIMATION FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED SIGNALS
    • 正交频分多路复用信号的稀疏信道估计
    • US20070223610A1
    • 2007-09-27
    • US11750039
    • 2007-05-17
    • Eric Jacobsen
    • Eric Jacobsen
    • H04K1/10
    • H04L25/0234H04L27/2647
    • A computationally efficient channel estimation technique for use within an orthogonal frequency division multiplexing (OFDM) communication system determines coefficients of a channel transfer function by calculating the dot products of a pilot vector and a plurality of interpolation vectors. One dot product is preferably calculated for each subcarrier of interest within the system. The pilot vector is extracted from an OFDM symbol received from a communication channel. In a preferred approach, a number of interpolation vectors are precalculated and stored within a communication device for subsequent use during channel estimation and equalization operations. The technique is highly flexible and can be implemented using, for example, a variable user block size or a variable pilot vector size.
    • 在正交频分复用(OFDM)通信系统中使用的计算有效的信道估计技术通过计算导频矢量和多个插值向量的点积来确定信道传递函数的系数。 对于系统内的感兴趣的每个子载波,优选地计算一个点积。 从从通信信道接收的OFDM符号中提取导频向量。 在优选的方法中,预先计算多个内插向量并将其存储在通信设备中,以便在信道估计和均衡操作期间随后使用。 该技术是高度灵活的,并且可以使用例如可变用户块大小或可变导频矢量大小来实现。