会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明申请
    • TIME MULTIPLEXED NON-COHERENT MULTIPATH SEARCH METHOD AND APPARATUS
    • 时间多重非相干多路径搜索方法和设备
    • WO2007018534A1
    • 2007-02-15
    • PCT/US2005/027698
    • 2005-08-05
    • THOMSON LICENSINGZHANG, BenyuanKNUTSON, Paul, GothardGAO, Wen
    • ZHANG, BenyuanKNUTSON, Paul, GothardGAO, Wen
    • H04B1/707
    • H04B1/7113H04B1/7095H04B1/7117H04B2201/70711
    • An apparatus for performing a multipath search including a plurality of time-multiplexed chip correlators, wherein each of the plurality of time-multiplexed chip correlators has a pipeline, and further wherein each of the plurality of time-multiplexed chip correlators has a accumulation time is described. A method is described for performing a multipath search including performing multipath search slot processing, determining if a current multipath searching slot is a last multipath searching slot, if the current multipath searching slot is not the last multipath searching slot, then repeating the performing step, if the current multipath searching slot is the last multipath searching slot, then initializing a multipath searching slot index, determining if an non-coherent accumulation has been completed if the accumulation has not been completed then repeating all steps and if the accumulation has been completed, then search results are sorted to locate energy peaks corresponding to multipath locations.
    • 一种用于执行包括多个时分多路复用芯片相关器的多路径搜索的装置,其中所述多个时分多路复用芯片相关器中的每一个具有流水线,并且其中所述多个时分多路复用芯片相关器中的每一个具有累加时间 描述。 描述了一种用于执行多路径搜索的方法,包括执行多路径搜索时隙处理,确定当前多径搜索时隙是否是最后的多路径搜索时隙,如果当前多路径搜索时隙不是最后的多路径搜索时隙,则重复执行步骤, 如果当前的多路径搜索时隙是最后的多路径搜索时隙,则初始化多路径搜索时隙索引,如果积累尚未完成则确定是否已经完成了非相干累积,然后重复所有步骤,并且如果累积已经完成, 然后搜索结果被排序以定位与多路径位置相对应的能量峰值。
    • 4. 发明申请
    • MULTIPATH SEARCHER RESULTS SORTING METHOD
    • 多路径搜索器结果分类方法
    • WO2007001288A1
    • 2007-01-04
    • PCT/US2005/022366
    • 2005-06-24
    • THOMSON LICENSING S.A.ZHANG, BenyuanKNUTSON, Paul, Gothard
    • ZHANG, BenyuanKNUTSON, Paul, Gothard
    • H04B1/707
    • H04B1/7113H04B1/7117
    • A method and apparatus for identifying valid multipath energy peaks are described including locating an energy peak in a profile of energy peaks, categorizing the located energy peak based on a plurality of thresholds and processing energy peaks in at least one of the categories of located energy peaks. The method and apparatus further includes removing a direct current value component from each value in the profile of energy peaks, calculating a noise floor for a multipath searching window and determining a first threshold and a second threshold. The step and means for categorizing further includes determining if the located energy peak exceeds the first threshold, labeling the located energy peak as a false alarm, if the located energy peak does not exceed the first threshold, determining if the located energy peak exceeds the second threshold and labeling the located energy peak as confident, if the located energy peak exceeds the second threshold.
    • 描述了用于识别有效多径能量峰值的方法和装置,包括将能量峰值定位在能量峰值分布中,基于多个阈值对定位的能量峰值进行分类,并且处理能量峰值在至少一个定位的能量峰值类别中 。 所述方法和装置还包括从能量峰值分布图中的每个值中去除直流电流值分量,计算多路径搜索窗口的本底噪声并确定第一阈值和第二阈值。 用于进一步分类的步骤和手段包括确定所定位的能量峰值是否超过第一阈值,如果定位的能量峰值不超过第一阈值,则将定位的能量峰值标记为假警报,确定所定位的能量峰值是否超过第二阈值 如果定位的能量峰值超过第二阈值,则将所定位的能量峰值置于可信度上。
    • 5. 发明申请
    • BIT INTERLEAVED LDPC CODED MODULATION AND PHYSICAL LAYER SIGNALING
    • 位切换LDPC编码调制和物理层信号
    • WO2010005470A2
    • 2010-01-14
    • PCT/US2009/003578
    • 2009-06-16
    • THOMSON LICENSINGLEI, JingGAO, WenKNUTSON, Paul, GothardCHEN, Hou-shin
    • LEI, JingGAO, WenKNUTSON, Paul, GothardCHEN, Hou-shin
    • H04L1/00H03M13/27H03M13/35H03M13/25
    • H04L1/0041H04L1/0057H04L1/007H04L1/0071
    • A proposal for a DVB-C2 baseline system, mainly focused on the channel coding and bit interleaving modules for spectrally efficient modulation is described. Due to the implementation simplicity of the low density parity check (LDPC) codes standardized in the DVB-S2 specification, it is proposed to extend their application to cable channels and choose the subset with long block length ( L = 64800 ) and medium to high rates ( 2/5 ≤ R ≤ 9/10 ) as the forward error correction (FEC) codes of DVB-C2 systems. Due to the non-uniform bitwise error protection inherent to high-order modulations (e.g. 256-QAM, 1024-QAM) and irregular LDPC codes (e.g. DVB-S2 codes), there exists a mismatch between the modulation and the channel coding in general if the two modules are developed independently but concatenated directly. To match the error resilience of a finite-length channel code and a given constellation, the principles described herein design a bit interleaver and insert it between the channel encoder and the modulator. As a result, a better tradeoff between bandwidth-efficiency and power-efficiency can be achieved with a minor increase of hardware complexity.
    • 描述了主要关注用于频谱高效调制的信道编码和比特交织模块的DVB-C2基线系统的提议。 由于在DVB-S2规范中标准化的低密度奇偶校验(LDPC)码的实现简单性,提出将其应用扩展到有线信道,并选择长块长度(L = 64800)和中到高的子集 速率(2/5 = R = 9/10)作为DVB-C2系统的前向纠错(FEC)码。 由于高阶调制(例如256-QAM,1024-QAM)和不规则LDPC码(例如DVB-S2代码)固有的不均匀的逐位错误保护,一般在调制和信道编码之间存在不匹配 如果两个模块是独立开发的,但是直接连接。 为了匹配有限长度信道码和给定星座的错误弹性,本文描述的原理设计了一个比特交织器,并将其插入到信道编码器和调制器之间。 因此,可以通过轻微增加硬件复杂性来实现带宽效率和功率效率之间更好的权衡。