Apparatus and method for transmitting and receiving side information of a partial transmit sequence in an OFDM communication system
    2.
    发明申请
    Apparatus and method for transmitting and receiving side information of a partial transmit sequence in an OFDM communication system 有权
    在OFDM通信系统中发送和接收部分发送序列的侧信息的装置和方法

    公开(公告)号:US20030202460A1

    公开(公告)日:2003-10-30

    申请号:US10423560

    申请日:2003-04-25

    IPC分类号: H04J011/00

    CPC分类号: H04L27/2621

    摘要: An OFDM (Orthogonal Frequency Division Multiplexing) communication system that multiplexes data with a plurality of orthogonal sub-carrier frequencies, which includes a transmitter for converting a serial data stream into parallel data, and segmenting the parallel data into a plurality of blocks having a plurality of data blocks; inserting reference data having information representing a phase value and a position into which the reference symbol is inserted, into each of the segmented blocks; IFFT (Inverse Fast Fourier Transform)-transforming the respective blocks into time-based signals where sub-carrier frequencies are separately assigned to the data blocks; and determining phase factors of the IFFT-transformed time-based signals to reduce a peak-to-average power ratio (PAPR) where non-linear distortion occurs due to coincidence of phases of the data blocks IFFT-transformed with the sub-carrier frequencies, and phase-rotating the IFFT-transformed signals according to the determined phase factors before transmission.

    摘要翻译: 一种OFDM(正交频分复用)通信系统,其将数据与多个正交副载波频率进行复用,所述OFDM系统包括用于将串行数据流转换为并行数据的发射机,并将该并行数据分割为具有多个 的数据块; 将具有表示相关值的信息和参考符号插入的位置的参考数据插入到每个分段块中; IFFT(逆快速傅立叶变换) - 将各个块转换为基于时间的信号,其中副载波频率被分配给数据块; 以及确定IFFT变换的基于时间的信号的相位因子,以减少由于与子载波频率IFFT变换的数据块的相位的一致而发生非线性失真的峰均功率比(PAPR) 并且根据所确定的相位因子在传输之前相位旋转IFFT变换的信号。

    Apparatus and method for minimizing PAPR in an OFDM communication system
    3.
    发明申请
    Apparatus and method for minimizing PAPR in an OFDM communication system 有权
    用于使OFDM通信系统中的PAPR最小化的装置和方法

    公开(公告)号:US20040136314A1

    公开(公告)日:2004-07-15

    申请号:US10746572

    申请日:2003-12-24

    IPC分类号: H04J004/00

    CPC分类号: H04L27/2618

    摘要: A signal transmission apparatus for minimizing a PAPR in an OFDM communication system. A subband divider divides L information data subcarrier signals into M subband signals. An additional information inserter inserts into the L information data subcarrier signals P additional information subcarrier signals having a sign bit indicating insertion of a dummy sequence and an address bit indicating a position of a dummy sequence-inserted subband. A dummy sequence inserter inserts the dummy sequence into a subband in the position. An IFFT block initially generates a first OFDM symbol signal by IFFT-transforming the P additional information subcarrier signals and M dummy sequence-free subband signals, and thereafter generates a second OFDM symbol signal by IFFT-transforming the P additional information subcarrier signals and M dummy sequence-inserted subband signals. A controller determines a sign bit value and an address bit value of the additional information when a PAPR value of the first OFDM symbol signal exceeds a predetermined PAPR threshold, and then performs a control operation of inserting the dummy sequence into a subband in a position corresponding to the address bit value so that the second OFDM symbol signal is transmitted over a downlink.

    摘要翻译: 一种用于使OFDM通信系统中的PAPR最小化的信号发送装置。 子带分配器将L个信息数据副载波信号分成M个子带信号。 附加信息插入器插入到L个信息数据副载波信号P中,附加信息副载波信号具有指示插入哑序列的符号位和表示虚拟序列插入子带位置的地址位。 虚拟序列插入器将虚拟序列插入该位置的子带中。 IFFT块首先通过对P个附加信息子载波信号和M个无码序列子带信号进行IFFT变换来产生第一OFDM符号信号,然后通过对P个附加信息副载波信号进行IFFT变换和M个伪码产生第二个OFDM符号信号 序列插入子带信号。 当第一OFDM符号信号的PAPR值超过预定的PAPR阈值时,控制器确定附加信息的符号位值和地址位值,然后执行将虚拟序列插入到相应位置的子带中的控制操作 到地址位值,使得第二OFDM符号信号通过下行链路传输。

    Apparatus and method for reducing PAPR in an OFDM mobile communication system
    4.
    发明申请
    Apparatus and method for reducing PAPR in an OFDM mobile communication system 有权
    OFDM移动通信系统中减少PAPR的装置和方法

    公开(公告)号:US20030142754A1

    公开(公告)日:2003-07-31

    申请号:US10290950

    申请日:2002-11-08

    IPC分类号: H04K001/10 H04L027/28

    CPC分类号: H04L27/2614

    摘要: Disclosed is an apparatus and method for reducing a peak-to-average power ratio (PAPR) due to multiple subcarriers in an OFDM (Orthogonal Frequency Division Multiplexing) mobile communication system. In the OFDM mobile communication system, a transmitter pre-emphasizes an output signal of an IFFT (Inverse Fast Fourier Transform) block, and a receiver de-emphasizes a received signal before FFT (Fast Fourier Transform), thereby efficiently reducing PAPR due to multiple subcarriers.

    摘要翻译: 公开了一种用于在OFDM(正交频分复用)移动通信系统中减少由于多个子载波引起的峰均功率比(PAPR)的装置和方法。 在OFDM移动通信系统中,发射机预加强IFFT(快速傅里叶逆变换)块的输出信号,接收机在FFT(快速傅里叶变换)之前对接收信号进行去加强强调,从而有效地减少由于多个 副载波。

    Transmitting/receiving apparatus and method for reducing PAPR in an OFDM mobile communication system
    5.
    发明申请
    Transmitting/receiving apparatus and method for reducing PAPR in an OFDM mobile communication system 有权
    用于减少OFDM移动通信系统中的PAPR的发送/接收装置和方法

    公开(公告)号:US20040058701A1

    公开(公告)日:2004-03-25

    申请号:US10630216

    申请日:2003-07-30

    IPC分类号: H04B007/00

    CPC分类号: H04L27/2617

    摘要: A block coding apparatus and method in an OFDM mobile communication system are provided. They reduce PAPR to 3 dB or less, while increasing a traditional block coding rate by twice, by use of complementary sequences. Therefore, spectral efficiency is improved by twice, maintaining the traditional error correction capability, and thus decoding is facilitated.

    摘要翻译: 提供了一种OFDM移动通信系统中的块编码装置和方法。 它们通过使用互补序列将PAPR降低到3dB以下,同时将传统的块编码率提高了两倍。 因此,频谱效率提高了两倍,保持了传统的纠错能力,从而便于解码。

    Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system
    6.
    发明申请
    Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system 审中-公开
    在正交频分复用通信系统中发送和接收有关选择性映射的侧信息的装置和方法

    公开(公告)号:US20040008616A1

    公开(公告)日:2004-01-15

    申请号:US10614416

    申请日:2003-07-07

    IPC分类号: H04J011/00

    CPC分类号: H04L27/2621

    摘要: An apparatus and method for transmitting and receiving data having a smallest PAPR in an SLM scheme for PAPR reduction in an OFDM communication system using multiple carriers. To transmit the data having the smallest PAPR, input symbol sequences are duplicated to a plurality of data blocks. Phase-rotated data blocks are generated by multiplying the plurality of data blocks by different phase sequences. Side information for identifying the phase-rotated data blocks is inserted into a predetermined t position of the phase-rotated data blocks. IFFT is performed on the data blocks containing the side information. The data block having the smallest PAPR is selected among the inverse fast Fourier transformed data blocks.

    摘要翻译: 一种用于在使用多个载波的OFDM通信系统中发送和接收SLM方案中用于PAPR减少的具有最小PAPR的数据的装置和方法。 为了发送具有最小PAPR的数据,将输入符号序列复制到多个数据块。 通过将多个数据块乘以不同的相位序列来生成相位旋转的数据块。 用于识别相位旋转数据块的侧信息被插入相位旋转数据块的预定t位置。 对包含边信息的数据块执行IFFT。 具有最小PAPR的数据块在快速傅里叶逆变换数据块中选择。

    Apparatus and method for gating dedicated physical control 5 channel in a mobile communication system
    8.
    发明申请
    Apparatus and method for gating dedicated physical control 5 channel in a mobile communication system 有权
    在移动通信系统中门控专用物理控制5信道的装置和方法

    公开(公告)号:US20020082020A1

    公开(公告)日:2002-06-27

    申请号:US09887388

    申请日:2001-06-22

    IPC分类号: H04Q007/20

    摘要: The present invention relates to a system for gating a dedicated physical control channel in a mobile communication system. A UTRAN (UMTS Terrestrial Radio Access Network) transmits a gating start command or a gating end command to a UE (User Equipment) through a specific transport format combination indicator symbol according to whether there exists data transmitted over a downlink physical shared channel and a dedicated physical data channel, thereby to start or end gating the dedicated physical control channel.

    摘要翻译: 本发明涉及一种在移动通信系统中选通专用物理控制信道的系统。 UTRAN(UMTS陆地无线电接入网络)根据是否存在通过下行链路物理共享信道发送的数据和专用的传输格式组合指示符符号向UE(用户设备)发送门控开始命令或门控结束命令 物理数据通道,从而开始或结束选通专用物理控制通道。