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    Multicarrier transmitter for multiple-input multiple-output communication systems and methods for puncturing bits for pilot tones
    112.
    发明申请
    Multicarrier transmitter for multiple-input multiple-output communication systems and methods for puncturing bits for pilot tones 失效
    用于多输入多输出通信系统的多载波发射机和用于对导频音进行删截比特的方法

    公开(公告)号：US20070071119A1

    公开(公告)日：2007-03-29

    申请号：US11234972

    申请日：2005-09-26

    Applicant: Alexei Davydov ,  Qinghua Li

    Inventor： Alexei Davydov ,  Qinghua Li

    IPC: H04K1/10

    CPC classification number: H04L1/0041 ,  H04L1/0068 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2626

    Abstract: Embodiments of a transmitter and methods for puncturing bits are generally described herein. Other embodiments may be described and claimed. In some embodiments, a multicarrier transmitter performs bit puncturing for pilot subcarriers in two operations. The first operation may uniformly removes bits from an encoded bit stream to achieve a predetermined code rate reserving space for pilot subcarriers of a predetermined number of antennas. The second operation may remove bits from each spatial data stream after interleaving in a manner to achieve approximately equal spacing between the punctured bits before interleaving. In this way, a conventional interleaver may be used. The second operation reserves space for pilot subcarriers when a greater number of antennas than the predetermined number are used.

    Abstract translation: 发射机的实施例和穿孔比特的方法一般在此描述。 可以描述和要求保护其他实施例。 在一些实施例中，多载波发射机在两个操作中对导频子载波执行比特删截。 第一操作可以均匀地从编码比特流中移除比特以实现预定数量的天线的导频子载波的预定码率预留空间。 第二操作可以在交织之后从每个空间数据流中移除比特，以便在交织之前在穿孔比特之间实现大致相等的间隔。 以这种方式，可以使用常规的交织器。 当使用比预定数量更多的天线时，第二操作为导频子载波保留空间。

    Increased discrete point processing in an OFDM communication system
    114.
    发明申请
    Increased discrete point processing in an OFDM communication system 有权
    在OFDM通信系统中增加离散点处理

    公开(公告)号：US20060115012A1

    公开(公告)日：2006-06-01

    申请号：US11291800

    申请日：2005-11-30

    Applicant: John Sadowsky ,  Alexander Maltsev ,  Vadim Sergeyev ,  Alexei Davydov

    Inventor： John Sadowsky ,  Alexander Maltsev ,  Vadim Sergeyev ,  Alexei Davydov

    IPC: H04K1/10

    CPC classification number: H04L27/2602 ,  H04L27/2607

    Abstract: Methods and apparatus provide increased symbol length with more subcarriers in a fixed-bandwidth system. The subcarriers spacing may be reduced to provide increased symbol length and enable higher throughput. In one implementation, a system compatible with the IEEE P802.11n proposal can use 128 subcarriers in 20 MHz operation to provide increased throughput in lower-bandwidth channel operation.

    Abstract translation: 方法和装置在固定带宽系统中提供具有更多子载波的增加的符号长度。 可以减小子载波间隔以提供增加的符号长度并实现更高的吞吐量。 在一个实现中，与IEEE P802.11n提议兼容的系统可以在20MHz操作中使用128个子载波来在较低带宽信道操作中提供增加的吞吐量。

    Method and adaptive bit interleaver for wideband systems using adaptive bit loading
    117.
    发明申请
    Method and adaptive bit interleaver for wideband systems using adaptive bit loading 有权
    使用自适应位加载的宽带系统的方法和自适应比特交织器

    公开(公告)号：US20050135493A1

    公开(公告)日：2005-06-23

    申请号：US10740170

    申请日：2003-12-18

    Applicant: Alexander Maltsev ,  Ali Sadri ,  Alexei Davydov

    Inventor： Alexander Maltsev ,  Ali Sadri ,  Alexei Davydov

    IPC: H04L1/00 ,  H04L27/26 ,  H04K1/10

    CPC classification number: H04L1/0071 ,  H04L1/0042 ,  H04L27/2608 ,  H04L27/2628

    Abstract: An adaptive interleaver for wideband orthogonal frequency division multiplexed (OFDM) communications permutes a variable number of coded bits per OFDM symbol (Ncbps). The variable number of coded bits is calculated based on individual subcarrier modulation assignments for orthogonal subcarriers of a wideband channel. The interleaver matrix size may be based on the variable number of coded bits per OFDM symbol and the number of subchannels that comprise the wideband channel. The interleaver may add padding bits to the interleaver matrix to fill any remaining positions, and after performing an interleaving operation, the interleaver may prune the padding bits to provide a sequence of interleaved bits for subsequent modulation on the orthogonal subcarriers. A receiver may include an adaptive deinterleaver to reverse the process.

    Abstract translation: 用于宽带正交频分复用（OFDM）通信的自适应交织器将每OFDM符号的可变数量的编码比特（Ncbps）置换。 基于宽带信道的正交子载波的各个子载波调制分配来计算编码比特的可变数目。 交织器矩阵大小可以基于每OFDM符号的可变数量的编码比特和构成宽带信道的子信道的数量。 交织器可以向交织器矩阵添加填充比特以填充任何剩余的位置，并且在执行交织操作之后，交织器可以修剪填充比特以提供交织的比特序列以用于正交子载波上的后续调制。 接收机可以包括自适应解交织器来反转该过程。

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