Hybrid-ARQ (HARQ) with scrambler
    61.
    发明授权
    Hybrid-ARQ (HARQ) with scrambler 有权
    混合ARQ(HARQ)与扰频器

    公开(公告)号:US08392781B2

    公开(公告)日:2013-03-05

    申请号:US12686929

    申请日:2010-01-13

    IPC分类号: G08C25/02 H03M13/00

    摘要: Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.

    摘要翻译: 本发明的实施例提供了一种混合自动重传请求(HARQ)处理的系统和方法。 维特比解码器耦合到并跟随解扰器。 在信号被解除加扰之后,如果需要与另一个数据包重新组合,则可将其存储在存储器中。 这意味着每个发送的比特的对数似然比LLRs使用有限数量的比特(例如,在4比特和12比特之间)存储在存储器中。 如果当前处理的分组包含重发信息,则可以将包含相同信息的先前分组存储的去加扰输出加载并与当前分组组合。

    Systems and methods for low-complexity MIMO detection using leaf-node prediction via look-up tables
    62.
    发明授权
    Systems and methods for low-complexity MIMO detection using leaf-node prediction via look-up tables 有权
    用于通过查找表使用叶节点预测的低复杂度MIMO检测的系统和方法

    公开(公告)号:US08306139B2

    公开(公告)日:2012-11-06

    申请号:US12016921

    申请日:2008-01-18

    IPC分类号: H04B7/02

    CPC分类号: H04L27/2601 H04L25/0202

    摘要: Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least one parameter corresponding to at least one predicted best leaf node candidate for the given channel realization. A MIMO engine receives the at least one parameter and enumerates at least one list of candidate vectors corresponding to the leaf nodes specified by the generated at least one parameter. Some embodiments simulate a MIMO detector over many channel realizations, track channel metric and parameter values used for each channel realization resulting from such simulating, and store, in a look-up table, best values of the tracked values used for a particular channel metric.

    摘要翻译: 用于提供多输入多输出(MIMO)检测的系统和方法,包括用于接收经处理的通信流的叶节点预测器,为给定的信道实现计算对应于通信流的至少一个信道度量,以及生成至少一个 参数对应于给定信道实现的至少一个预测的最佳叶节点候选。 MIMO引擎接收所述至少一个参数,并且列举与由所生成的至少一个参数指定的叶节点相对应的候选向量的至少一个列表。 一些实施例通过许多信道实现来模拟MIMO检测器,跟踪信道度量和用于每个信道实现的参数值,由这样的模拟和存储在查找表中,用于特定信道度量的跟踪值的最佳值。

    Primary and secondary synchronization codes from first, second, third sequences
    63.
    发明授权
    Primary and secondary synchronization codes from first, second, third sequences 有权
    来自第一,第二和第三序列的主和次同步码

    公开(公告)号:US08144747B2

    公开(公告)日:2012-03-27

    申请号:US12949413

    申请日:2010-11-18

    IPC分类号: H04B1/69 H04B1/707 H04B1/713

    摘要: A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a secondary synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences in the plurality of sequences. The third sequence comprises a subset of bits from the first sequence.

    摘要翻译: 无线通信系统。 该系统包括发射机电路(BST1),该发射机电路包括用于传输多个帧(FR)的编码器电路(50)。 多个帧中的每一个包括主同步码(PCS)和辅同步码(SSC)。 编码器电路包括用于响应于第一序列(32)提供主同步码的电路(501)。 编码器电路还包括用于响应于第二序列(54)和第三序列(56)提供辅助同步码的电路(502)。 第二序列从多个序列中选择。 多个序列中的每一个相对于多个序列中的所有其他序列是正交的。 第三序列包括来自第一序列的比特的子集。

    TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM
    64.
    发明申请
    TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM 审中-公开
    基于变换的系统和用于重构MIMO-OFDM系统中的转向矩阵的方法

    公开(公告)号:US20120045017A1

    公开(公告)日:2012-02-23

    申请号:US13286405

    申请日:2011-11-01

    IPC分类号: H04L27/00

    摘要: Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known.

    摘要翻译: 实施例提供了一种用于表示多输入多输出正交频分复用(MIMO-OFDM)系统的发射波束成形中的导引矩阵的基于变换的方法。 波束形成实施例为已知信道信息的子载波的至少一个子集生成导向矩阵的基于变换的表示。 在一些实施例中,波束形成器能够接收用于信道子载波的至少子集的变换矩阵信息,并且生成相应的信道子载波导引矩阵。 在将变换矩阵信息发送到波束形成器之前,波束形成器的一些实施例能够将信道子载波导引矩阵的至少一个子集映射到对应的变换矩阵信息。 波束形成器的其他实施例能够接收信道的子载波的至少一个子集的信道信息,并且为已知信道信息的每个子载波计算导频矩阵的基于变换的表示。

    Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities
    65.
    再颁专利
    Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities 有权
    具有发射机的无线系统具有多个发射天线并组合开环和闭环发射分集

    公开(公告)号:USRE42681E1

    公开(公告)日:2011-09-06

    申请号:US11124595

    申请日:2005-05-05

    IPC分类号: H03C7/02 H04B1/02 H04B7/02

    摘要: A wireless communication system (40). The system comprises transmitter circuitry (42) comprising encoder circuitry (44) for receiving a plurality of symbols (Si). The system further comprises a plurality of antennas (AT1-AT4) coupled to the transmitter circuitry and for transmitting signals from the transmitter circuitry to a receiver (UST), wherein the signals are responsive to the plurality of symbols. Further, the encoder circuitry is for applying open loop diversity and closed loop diversity to the plurality of symbols to form the signals.

    摘要翻译: 一种无线通信系统(40)。 该系统包括发射机电路(42),包括用于接收多个符号(Si)的编码器电路(44)。 该系统还包括耦合到发射机电路的多个天线(AT1-AT4),并用于将信号从发射机电路传输到接收机(UST),其中信号响应于多个符号。 此外,编码器电路用于向多个符号施加开环分集和闭环分集以形成信号。

    Parameterized sphere detector and methods of using the same
    66.
    发明授权
    Parameterized sphere detector and methods of using the same 有权
    参数化球面探测器及其使用方法

    公开(公告)号:US07961826B2

    公开(公告)日:2011-06-14

    申请号:US11928863

    申请日:2007-10-30

    IPC分类号: H04B7/10 H04L1/02

    摘要: A Multiple-input Multiple-Output (MIMO) receiver is provided. The MIMO receiver comprises a parameterized sphere detector having two search modes. During a first search mode, the parameterized sphere detector enumerates a number of best candidate vectors up to a fixed parameter value. During a second search mode, the parameterized sphere detector enumerates additional candidate vectors using a greedy search until a predetermined number of candidate vectors have been enumerated.

    摘要翻译: 提供多输入多输出(MIMO)接收机。 MIMO接收机包括具有两个搜索模式的参数化球体检测器。 在第一搜索模式期间,参数化球体检测器枚举多达一个固定参数值的最佳候选向量。 在第二搜索模式期间,参数化球体检测器使用贪婪搜索枚举附加候选向量,直到已经列举了预定数量的候选向量。

    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing
    67.
    发明授权
    Versatile system for dual carrier transformation in orthogonal frequency division multiplexing 有权
    用于正交频分复用的双载波变换的多功能系统

    公开(公告)号:US07889635B2

    公开(公告)日:2011-02-15

    申请号:US12685404

    申请日:2010-01-11

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2602 H04B1/7176

    摘要: The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

    摘要翻译: 本发明提供了一种用于在正交频分复用(OFDM)系统,特别是超宽带(UWB)系统内的多个载波路径上选择性地扩展载波数据的通用系统。 本发明提供一种将数据传递给随机发生器的数据输入。 数据然后传递到卷积码功能,其输出由穿孔功能打孔。 交织器功能接收穿孔码数据,并与映射器元件协作操作以通过IFFT准备用于预传输转换的编码数据。 映射器元件包括双载波调制功能,其将两个穿孔码数据元素相关联并变换为用于在两个分离的信号音调上传输的格式。

    Handover for DVB-H
    69.
    发明申请
    Handover for DVB-H 有权
    DVB-H的切换

    公开(公告)号:US20080273497A1

    公开(公告)日:2008-11-06

    申请号:US11800703

    申请日:2007-05-04

    IPC分类号: H04Q7/00

    摘要: A method of wireless handover in a broadcast network (FIGS. 5 and 8) is disclosed. A wireless receiver (FIG. 4) receives a first signal (N) from a first transmitter (f1). The receiver measures a signal strength (RSSI) of the first signal. The strength of the first signal is compared to a first threshold (T0). The receiver receives a second signal (N+3) from a second transmitter (f3) in response to the step of comparing. The first and the second signals are sent to an application processor (120). The wireless receiver continues to receive the first and second signals until the application processor terminates receiving one of the first and second signals.

    摘要翻译: 公开了广播网络中的无线切换的方法(图5和图8)。 无线接收器(图4)从第一发射机(f 1> 1)接收第一信号(N)。 接收机测量第一信号的信号强度(RSSI)。 将第一信号的强度与第一阈值(T 0> 0)进行比较。 响应于比较步骤,接收机从第二发射机(f 3> 3)接收第二信号(N + 3)。 第一和第二信号被发送到应用处理器(120)。 无线接收机继续接收第一和第二信号,直到应用处理器终止接收第一和第二信号之一。