Apparatus for generating 2D spreading code and method for the same
    21.
    发明授权
    Apparatus for generating 2D spreading code and method for the same 有权
    用于生成2D扩展码的装置及其方法

    公开(公告)号:US07586835B2

    公开(公告)日:2009-09-08

    申请号:US10995466

    申请日:2004-11-24

    IPC分类号: G04B5/24

    CPC分类号: H04J13/12 H04J13/0044

    摘要: An apparatus for generating a 2D spreading code and method for the same are proposed. The apparatus for generating the 2D spreading code includes a column counter, a row counter, a codeword selector, and a logic unit. The logic unit performs logic operations on the output of the column counter, the row counter, and the codeword selector to generate the 2D spreading code of desired order designated by the codeword selector. The 2D spreading code includes 4 2×2 initial matrixes for generating 4i codes for 4i users in the ith order. The apparatus for generating the 2D spreading code according to the present invention is advantageously used in OFDM system to increase the number of subscribers with reduced interference.

    摘要翻译: 提出了一种用于生成2D扩展码的装置及其方法。 用于生成2D扩展码的装置包括列计数器,行计数器,码字选择器和逻辑单元。 逻辑单元对列计数器,行计数器和码字选择器的输出执行逻辑运算,以生成由码字选择器指定的期望顺序的2D扩展码。 2D扩展码包括4个2x2初始矩阵,用于以第i个顺序为4i个用户生成4i码。 根据本发明的用于生成2D扩展码的装置在OFDM系统中有利地用于增加具有减小的干扰的用户数量。

    METHODS AND DEVICES FOR SCALABLE RECEPTION IN WIRELESS COMMUNICATION SYSTEMS
    22.
    发明申请
    METHODS AND DEVICES FOR SCALABLE RECEPTION IN WIRELESS COMMUNICATION SYSTEMS 有权
    无线通信系统中可扩展接收的方法和设备

    公开(公告)号:US20090147720A1

    公开(公告)日:2009-06-11

    申请号:US12325540

    申请日:2008-12-01

    IPC分类号: H04H20/71

    摘要: Methods and apparatuses for reception of point-to-multipoint (PTM) transmissions in a wireless communication system including a set of receiving devices. The method includes receiving location information respectively associated with each of a plurality of PTM data versions, and retrieving the plurality of PTM data versions using the location information. The method also includes combining the retrieved plurality of PTM data versions to generate a combined PTM data version, and decoding the combined PTM data version.

    摘要翻译: 在包括一组接收装置的无线通信系统中接收点对多点(PTM)传输的方法和装置。 该方法包括接收分别与多个PTM数据版本中的每一个相关联的位置信息,以及使用位置信息检索多个PTM数据版本。 该方法还包括组合检索的多个PTM数据版本以生成组合的PTM数据版本,以及对组合的PTM数据版本进行解码。

    Method of equalization in an OFDM system
    23.
    发明申请
    Method of equalization in an OFDM system 有权
    OFDM系统中的均衡方法

    公开(公告)号:US20050180461A1

    公开(公告)日:2005-08-18

    申请号:US10778087

    申请日:2004-02-17

    IPC分类号: H04J11/00 H04L25/03

    摘要: An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.

    摘要翻译: 一种适用于使用多个子载波的正交频分复用(OFDM)系统中的接收机中的均衡方法。 接收机包括用于解码的外部接收机。 所述均衡方法包括:接收包括包含训练序列的至少一个前导码符号的输入信号和包含串行串流样本的多个信息OFDM符号,以及对每个信息OFDM符号执行补偿。 每个信息OFDM符号的补偿包括将样本的串行流转换为并行采样,执行并行采样的快速傅里叶变换(FFT)以获得多个数据符号,每个数据符号对应于子载波,补偿 所述数据符号用于至少一个第一相位失真和至少一个第二相位失真,并且向所述外部接收器提供至少一个幅度失真因子。

    Apparatus of transmitter and receiver for MIMO MC-CDMA system
    24.
    发明申请
    Apparatus of transmitter and receiver for MIMO MC-CDMA system 有权
    MIMO MC-CDMA系统的发射机和接收机装置

    公开(公告)号:US20050111424A1

    公开(公告)日:2005-05-26

    申请号:US10868804

    申请日:2004-06-17

    摘要: The invention relates to an apparatus of transmitter and receiver for MIMO MC-CDMA systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. Upon the invention, the space, time, and frequency diversity can be explored.

    摘要翻译: 本发明涉及用于MIMO MC-CDMA系统的发射机和接收机的装置。 在发射机处,使用修正的正交发射分集(MOTD)编码器来增加空间和时间的传输分集。 P路组合器用于连接MOTD编码器和P多载波调制器。 每个调制器连接到一组天线。 在接收机处,每个多载波解调器具有幅度/相位补偿器,用于补偿每个子载波的失真。 类似地,组合器用于连接解调器和MOTD解码器。 根据本发明,可以探索空间,时间和频率多样性。