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    • 1. 发明申请
    • ANALOG ITERATIVE DECODER WITH EARLY-TERMINATION
    • 具有早期终止的模拟迭代解码器
    • US20100281337A1
    • 2010-11-04
    • US12431917
    • 2009-04-29
    • Ming Yam LoWai Ho MowWing Hung Ki
    • Ming Yam LoWai Ho MowWing Hung Ki
    • H03M13/05G06F11/10
    • H03M13/11H03M13/6597
    • An iterative decoder comprising a transconductance amplifier, a sampler, a Min-Sum decoder, and an early determination module is provided. The transconductance amplifier outputs a current proportional to the voltage of the coded bit stream. The sampler converts the amplified current into a plurality of currents and stores the sampled currents in a plurality of buffers. The Min-Sum decoder receives parallel currents, wherein currents represent the message of each variable node. The Min-Sum decoder exchanges the message of variable nodes and check nodes iteratively and outputs a set of decode codewords according to the possibilities. The early terminating module stops the iterative decoding when the decoded codeword converged.
    • 提供了包括跨导放大器,采样器,最小和解码器和早期确定模块的迭代解码器。 跨导放大器输出与编码比特流的电压成比例的电流。 采样器将放大的电流转换成多个电流并将采样的电流存储在多个缓冲器中。 最小和解码器接收并行电流,其中电流表示每个变量节点的消息。 Min-Sum解码器迭代地交换变量节点和校验节点的消息,并根据可能性输出一组解码码字。 当解码的码字收敛时,早期终接模块停止迭代解码。
    • 2. 发明授权
    • Analog iterative decoder with early-termination
    • 具有早期终止的模拟迭代解码器
    • US08291298B2
    • 2012-10-16
    • US12431917
    • 2009-04-29
    • Ming Yam LoWai Ho MowWing Hung Ki
    • Ming Yam LoWai Ho MowWing Hung Ki
    • G06F11/00
    • H03M13/11H03M13/6597
    • An iterative decoder comprising a transconductance amplifier, a sampler, a Min-Sum decoder, and an early determination module is provided. The transconductance amplifier outputs a current proportional to the voltage of the coded bit stream. The sampler converts the amplified current into a plurality of currents and stores the sampled currents in a plurality of buffers. The Min-Sum decoder receives parallel currents, wherein currents represent the message of each variable node. The Min-Sum decoder exchanges the message of variable nodes and check nodes iteratively and outputs a set of decode codewords according to the possibilities. The early terminating module stops the iterative decoding when the decoded codeword converged.
    • 提供了包括跨导放大器,采样器,最小和解码器和早期确定模块的迭代解码器。 跨导放大器输出与编码比特流的电压成比例的电流。 采样器将放大的电流转换成多个电流并将采样的电流存储在多个缓冲器中。 最小和解码器接收并行电流,其中电流表示每个变量节点的消息。 Min-Sum解码器迭代地交换变量节点和校验节点的消息,并根据可能性输出一组解码码字。 当解码的码字收敛时,早期终接模块停止迭代解码。
    • 3. 发明授权
    • Polyphase sequences for wireless communications
    • 用于无线通信的多相序列
    • US08699956B2
    • 2014-04-15
    • US13482732
    • 2012-05-29
    • Wai Ho MowJianhua Sun
    • Wai Ho MowJianhua Sun
    • H04B1/02
    • H04J13/10H04L27/2613H04L27/2655
    • Polyphase sequence generation is provided for sequences having good aperiodic correlation properties. The sequences can allow lengths not attainable by other types of sequences (such as Frank sequences) and can yield increase merit factors and more desirable peak-to-side-peak ratios (and therefore decreased sidelobe energy) than other sequences (such as Chu sequences). Perfect root-of-unity sequences of lengths up to 32, achieving the minimum phase alphabets and the maximum merit factors and/or peak-to-side-peak ratios, are searched, and the results are tabulated. Comparing the merit factors and peak-to-side-peak ratios of the best search results to other sequences, a common construction pattern of the improved sequences of length 2m2 are obtained. The improved sequences can be utilized in a variety of configurations, including spread spectrum communication, radar, channel estimation, system identification, and/or the like.
    • 为具有良好的非周期相关性质的序列提供多相序列产生。 这些序列可以允许其他类型的序列(例如Frank序列)不能获得的长度,并且可以产生比其他序列(例如Chu序列)增加优点因子和更期望的峰 - 侧峰比(并因此降低旁瓣能量) )。 搜索长达32个的完整的根长度序列,实现最小相位字母和最大优点因子和/或峰 - 峰比,并将结果列表。 将最佳搜索结果的优点因素和峰 - 峰比率与其他序列进行比较,得到长度为2m2的改进序列的常见构造模式。 改进的序列可以用于各种配置,包括扩频通信,雷达,信道估计,系统识别等。
    • 4. 发明授权
    • Spreading sequences with dual low correlation windows for quasi-synchronous code-division multiple-access communications
    • 扩展序列具有用于准同步码分多址通信的双低相关窗口
    • US08306092B2
    • 2012-11-06
    • US12370009
    • 2009-02-12
    • Wei Hsiang WuHo Yin ChanWai Ho Mow
    • Wei Hsiang WuHo Yin ChanWai Ho Mow
    • H04B1/00
    • H04J13/0007H04B1/7163H04J13/10
    • Sequence generation in wireless communication is provided for sequences having good aperiodic correlation properties. In particular, dual window quasi-Barker sequences are generated that possess at least some properties of Barker sequences. In addition, the sequences can be orthogonal to mitigate multiple access interference. Dual windowing allows the sequences even after being phase modulated by data to be recognized, provided that delay in transmission is large as compared to the correlation zone. In this regard, the sequences can be utilized in quasi-synchronous spread spectrum and/or code division multiple access (CDMA) signal communication to provide orthogonality while substantially eliminating inter-user and inter-symbol interference. In addition, unlike the single window low periodic correlation sequences, system overheads, such as cyclic prefix, need not be utilized in transmission as the data modulation effect can be accounted for by the dual windowing.
    • 为具有良好的非周期相关特性的序列提供无线通信中的序列生成。 特别地,生成具有Barker序列的至少一些性质的双窗口准巴克序列。 此外,序列可以是正交的,以减轻多址接入干扰。 即使在数据被相位调制之后,双窗口也允许序列被识别,只要传输延迟比相关区域大。 在这方面,这些序列可以用于准同步扩频和/或码分多址(CDMA)信号通信以提供正交性,同时基本上消除了用户间和符号间干扰。 另外,与单窗口低周期相关序列不同,系统开销(例如循环前缀)不需要在传输中使用,因为数据调制效应可以通过双窗口来解决。
    • 9. 发明授权
    • Soft forwarding for cooperative wireless communication
    • 软转发协作无线通信
    • US08787428B2
    • 2014-07-22
    • US13107603
    • 2011-05-13
    • Gao Yang DaiWai Ho Mow
    • Gao Yang DaiWai Ho Mow
    • H04B7/15H04L25/20
    • H04L1/0077H04B7/15521H04B7/15592H04L2001/0097
    • Providing for soft error decoding for wireless relay networks is described herein. By way of example, a wireless node in a wireless relay network can receive a direct signal from a source node, and can receive a forwarded version of the source signal from a relay node. An information flag included with the forwarded version is referenced to determine whether the relay node properly received the source signal. If the relay node received the source signal with an error and a destination node received the source signal with an error, soft decision information can be generated from the forwarded version of the source signal and employed to assist with decoding of the source signal at the destination node. The soft-decision information improves end-to-end performance of the wireless relay system, while mitigating complexity and bandwidth requirements for the relay node as compared with conventional signal decoding techniques.
    • 本文描述了为无线中继网络提供软错误解码。 作为示例,无线中继网络中的无线节点可以从源节点接收直接信号,并且可以从中继节点接收源信号的转发版本。 引用包含在转发版本中的信息标志来确定中继节点是否正确地接收到源信号。 如果中继节点接收到具有错误的源信号,并且目的地节点接收到具有错误的源信号,则可以从源信号的转发版本生成软判决信息,并且用于协助在目的地处解码源信号 节点。 与常规信号解码技术相比,软判决信息提高了无线中继系统的端到端性能,同时减轻了中继节点的复杂性和带宽要求。