Apparatus and method for transmitting/receiving pilot signals in an OFDM communication system
    112.
    发明申请
    Apparatus and method for transmitting/receiving pilot signals in an OFDM communication system 审中-公开
    在OFDM通信系统中发送/接收导频信号的装置和方法

    公开(公告)号:US20050094550A1

    公开(公告)日:2005-05-05

    申请号:US10978814

    申请日:2004-11-01

    IPC分类号: H04J11/00 H04L27/26

    摘要: A radio communication system divides an entire frequency band into a plurality of subcarrier bands, forms a symbol with signals on the subcarrier bands, forms a frame with a plurality of symbols, transmits a pilot signal within symbols in a predetermined position of the frame, and transmits a data signal within symbols other than the symbols for transmitting the pilot signal. A transmitter allocates subcarriers through which the reference signal is transmitted, wherein the subcarriers are allocated to have an exclusive relation with subcarriers through which reference signals of other transmitters are transmitted, generates the pilot signal, performs an inverse fast Fourier transform (IFFT) on the pilot signal by applying an IFFT size which is less than or equal to an IFFT size applied to the data signal, and transmits the IFFT-processed reference signal to a receiver.

    摘要翻译: 无线电通信系统将整个频带划分为多个子载波频带,在子载波频带上形成具有信号的符号,形成具有多个符号的帧,在帧的预定位置的符号内发送导频信号,以及 在除了用于发送导频信号的符号之外的符号内发送数据信号。 发射机分配通过其发送参考信号的子载波,其中子载波被分配为与其他发射机的参考信号通过其发送的子载波具有排他关系,产生导频信号,在该载波上执行快速傅立叶逆变换(IFFT) 通过应用小于或等于应用于数据信号的IFFT尺寸的IFFT尺寸的IFFT尺寸的导频信号,并将IFFT处理的参考信号发送到接收机。

    LDPC decoding apparatus and method based on node memory
    114.
    发明授权
    LDPC decoding apparatus and method based on node memory 有权
    基于节点存储器的LDPC解码装置和方法

    公开(公告)号:US07886208B2

    公开(公告)日:2011-02-08

    申请号:US11702015

    申请日:2007-02-02

    IPC分类号: H03M13/00

    摘要: An apparatus is provided for decoding a Low-Density Parity Check (LDPC) code in a communication system. In the LDPC decoding apparatus, an edge memory stores a message delivered through an edge between a variable node and a check node. A node memory stores a node value. A node processor performs a node processing operation using information stored in at least one of the node memory and the edge memory, stores a check node value generated by performing the node processing operation in the node memory, and stores a message generated by performing the node processing operation in the edge memory. A switch switches outputs of the node memory and the node processor through a permutation operation. A parity check verifier parity-checks an output from the node memory. A controller provides a control signal for controlling the node processor.

    摘要翻译: 提供了一种用于对通信系统中的低密度奇偶校验(LDPC)码进行解码的装置。 在LDPC解码装置中,边缘存储器存储通过可变节点和校验节点之间的边缘递送的消息。 节点存储器存储节点值。 节点处理器使用存储在节点存储器和边缘存储器中的至少一个中的信息执行节点处理操作,将通过在节点存储器中执行节点处理操作生成的校验节点值存储,并存储通过执行节点生成的消息 边缘存储器中的处理操作。 A交换机通过置换操作来切换节点存储器和节点处理器的输出。 奇偶校验验证器奇偶校验 - 检查节点存储器的输出。 控制器提供用于控制节点处理器的控制信号。

    Partial iterative detection and decoding apparatus and method in MIMO system
    116.
    发明申请
    Partial iterative detection and decoding apparatus and method in MIMO system 有权
    MIMO系统中的部分迭代检测和解码设备和方法

    公开(公告)号:US20070150797A1

    公开(公告)日:2007-06-28

    申请号:US11638785

    申请日:2006-12-14

    IPC分类号: H03M13/00

    摘要: A partial iterative detection and decoding apparatus in a Multiple Input Multiple Output (MIMO) system includes a detector for detecting signals received through at least one receive antenna to generate a first soft decision value, a decoder for decoding the first soft decision value to generate a second soft decision value, and a reliability determiner for determining a signal to be iteratively detected and decoded by using the second soft decision value. Accordingly, the complexity of the receiver is reduced and the number of iterations limited due to the complexity is increased, thereby improving the performance of the receiver.

    摘要翻译: 多输入多输出(MIMO)系统中的部分迭代检测和解码装置包括用于检测通过至少一个接收天线接收的信号以产生第一软判决值的检测器,用于解码第一软判决值以产生 第二软判决值,以及用于通过使用第二软判决值来确定要迭代检测和解码的信号的可靠性确定器。 因此,接收机的复杂度降低,并且由于复杂性而限制的迭代次数增加,从而提高了接收机的性能。

    Apparatus and method for allocating channel and power in communication system
    118.
    发明授权
    Apparatus and method for allocating channel and power in communication system 有权
    通信系统中通道和功率分配的装置和方法

    公开(公告)号:US08478321B2

    公开(公告)日:2013-07-02

    申请号:US13018748

    申请日:2011-02-01

    IPC分类号: H04W72/04

    摘要: An apparatus and method for allocating a channel and power by a Base Station (BS) in a communication system are provided. The method includes, performing one of a first scheduling, which uses inter-cell cooperation information received from at least one neighboring BS and a data rate received from each User Equipment (UE), and a second scheduling, which uses both an average data rate for each subchannel computed by accumulating the data rates for a preset time period and the inter-cell cooperation information, selecting a UE to be allocated each subchannel in each subframe based on results of the performed scheduling, computing a power metric for each of the selected UE and a non-selected UE by using the inter-cell cooperation information, the average data rate, an amount of performance change of the selected UE, and the results of the performed scheduling; and allocating power to all UEs including the selected UE and the non-selected UE by preset subframe periods by using the computed power metric.

    摘要翻译: 提供了一种用于在通信系统中由基站(BS)分配信道和功率的装置和方法。 该方法包括执行使用从至少一个相邻BS接收到的小区间协作信息的第一调度和从每个用户设备(UE)接收的数据速率的第一调度中的一个,以及使用平均数据速率 对于通过在预设时间段内累积数据速率和小区间协作信息而计算的每个子信道,基于所执行的调度的结果,选择要在每个子帧中分配每个子信道的UE,计算所选择的每一个的功率度量 UE和未选择的UE,通过使用小区间协作信息,平均数据速率,所选择的UE的性能变化量以及所执行的调度的结果; 以及通过使用所计算的功率度量,通过预设的子帧周期向包括所选择的UE和未选择的UE的所有UE分配功率。

    LDPC decoding apparatus and method based on node memory
    119.
    发明申请
    LDPC decoding apparatus and method based on node memory 有权
    基于节点存储器的LDPC解码装置和方法

    公开(公告)号:US20070220398A1

    公开(公告)日:2007-09-20

    申请号:US11702015

    申请日:2007-02-02

    IPC分类号: H03M13/00

    摘要: An apparatus is provided for decoding a Low-Density Parity Check (LDPC) code in a communication system. In the LDPC decoding apparatus, an edge memory stores a message delivered through an edge between a variable node and a check node. A node memory stores a node value. A node processor performs a node processing operation using information stored in at least one of the node memory and the edge memory, stores a check node value generated by performing the node processing operation in the node memory, and stores a message generated by performing the node processing operation in the edge memory. A switch switches outputs of the node memory and the node processor through a permutation operation. A parity check verifier parity-checks an output from the node memory. A controller provides a control signal for controlling the node processor.

    摘要翻译: 提供了一种用于对通信系统中的低密度奇偶校验(LDPC)码进行解码的装置。 在LDPC解码装置中,边缘存储器存储通过可变节点和校验节点之间的边缘递送的消息。 节点存储器存储节点值。 节点处理器使用存储在节点存储器和边缘存储器中的至少一个中的信息执行节点处理操作,将通过在节点存储器中执行节点处理操作生成的校验节点值存储,并存储通过执行节点生成的消息 边缘存储器中的处理操作。 A交换机通过置换操作来切换节点存储器和节点处理器的输出。 奇偶校验验证器奇偶校验 - 检查节点存储器的输出。 控制器提供用于控制节点处理器的控制信号。

    Apparatus and method for receiving a signal in a communication system
    120.
    发明申请
    Apparatus and method for receiving a signal in a communication system 有权
    用于在通信系统中接收信号的装置和方法

    公开(公告)号:US20070183544A1

    公开(公告)日:2007-08-09

    申请号:US11650897

    申请日:2007-01-08

    IPC分类号: H03D1/04

    CPC分类号: H04B1/123 H04B7/0857

    摘要: In a communication system, information regarding a first modulation scheme applied to a frequency domain in a serving base station is received from the serving base station. A signal of the frequency domain is received. A second modulation scheme is set by estimating a modulation scheme applied to the frequency domain in at least one neighbor base station from the received signal. Channel state information is generated by estimating the received signal. An operation for selecting whether to use interference cancellation is performed using the channel state information, the first modulation scheme information and the second modulation scheme.

    摘要翻译: 在通信系统中,从服务基站接收关于服务基站中应用于频域的第一调制方式的信息。 接收频域的信号。 通过从接收到的信号估计在至少一个相邻基站中应用于频域的调制方案来设置第二调制方案。 通过估计接收信号来生成信道状态信息。 使用信道状态信息,第一调制方式信息和第二调制方式来执行用于选择是否使用干扰消除的操作。