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    Coding scheme for a wireless communication system
    1.
    发明申请
    Coding scheme for a wireless communication system 有权
    无线通信系统的编码方案

    公开(公告)号：US20050276344A1

    公开(公告)日：2005-12-15

    申请号：US11208263

    申请日：2005-08-18

    申请人： Fuyun Ling ,  Nagabhushana Sindhushayana ,  Jay Walton ,  Mark Wallace ,  Ivan Fernandez

    发明人： Fuyun Ling ,  Nagabhushana Sindhushayana ,  Jay Walton ,  Mark Wallace ,  Ivan Fernandez

    IPC分类号： H04J11/00 ,  H04B7/04 ,  H04J99/00 ,  H04L1/00 ,  H04L27/26 ,  H04L1/02 ,  H04B7/10 ,  H04K1/10

    CPC分类号： H04B7/0417 ,  H04B7/0632 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/03171 ,  H04L27/3488

    摘要： Coding techniques for a (e.g., OFDM) communication system capable of transmitting data on a number of “transmission channels” at different information bit rates based on the channels' achieved SNR. A base code is used in combination with common or variable puncturing to achieve different coding rates required by the transmission channels. The data (i.e., information bits) for a data transmission is encoded with the base code, and the coded bits for each channel (or group of channels with the similar transmission capabilities) are punctured to achieve the required coding rate. The coded bits may be interleaved (e.g., to combat fading and remove correlation between coded bits in each modulation symbol) prior to puncturing. The unpunctured coded bits are grouped into non-binary symbols and mapped to modulation symbols (e.g., using Gray mapping). The modulation symbol may be “pre-conditioned” and prior to transmission.

    摘要翻译： 能够基于信道实现的SNR以不同的信息比特率在多个“传输信道”上发送数据的（例如，OFDM）通信系统的编码技术。 基本码与公共或可变的打孔组合使用以实现传输信道所需的不同的编码速率。 针对数据传输的数据（即，信息比特）用基本码进行编码，并且针对每个信道（或具有相似传输能力的信道组）的编码比特被打孔以实现所需的编码率。 在穿孔之前，编码比特可以被交织（例如，以抵消衰落并消除每个调制符号中的编码比特之间的相关性）。 未经穿孔的编码比特被分组成非二进制符号并映射到调制符号（例如，使用灰色映射）。 调制符号可以是“预调节”并且在传输之前。

    Method and apparatus for adaptive linear equalization for walsh covered modulation
    4.
    发明授权
    Method and apparatus for adaptive linear equalization for walsh covered modulation 有权

    公开(公告)号：US06522683B1

    公开(公告)日：2003-02-18

    申请号：US09636008

    申请日：2000-08-10

    申请人： John E. Smee ,  Ahmad Jalali ,  Fuyun Ling ,  Mark Wallace

    发明人： John E. Smee ,  Ahmad Jalali ,  Fuyun Ling ,  Mark Wallace

    IPC分类号： H04B169

    CPC分类号： H04B1/7097 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477

    摘要： A receive filter receives signals from a communication channel. The received signals correspond to original Walsh covered chip sequences transmitted by a transmit filter through the communication channel to the receive filter. The received signals are processed by an equalizer to generate a soft estimate of chip sequences corresponding to the original Walsh covered chip sequences. An N chip Walsh decover is then utilized to generate a soft estimate of code symbols corresponding to the soft estimate of the chip sequences. A number of symbol slicers are then used in parallel to produce a hard estimate of the code symbols corresponding to the soft estimate of code symbols generated by the N chip Walsh decover. Thereafter an N chip Walsh cover is used as part of a scheme to generate a hard estimate of chip sequences corresponding to the hard estimate of the code symbols generated by the symbol slicers. The hard estimate of the chip sequences generated with the aid of the N chip Walsh cover, and the soft estimate of the chip sequences generated by the equalizer, are used to generate a tracking mode error signal to adapt the response of the equalizer to the received signals.