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
    • 3. 发明申请
    • DEMODULATION METHOD
    • 解调方法
    • WO2008035809A1
    • 2008-03-27
    • PCT/JP2007/068742
    • 2007-09-19
    • NEC CORPORATIONBUI, ThanhSIEW, Jiun
    • BUI, ThanhSIEW, Jiun
    • H04L27/00
    • H04L25/067H04L27/38H04L27/3845
    • A method of calculating at least one soft bit corresponding to a data symbol received by a radio receiver is described. In one form the method (300) includes, calculating an average amplitude at least one received data symbol. The method also includes calculating (304) at least one threshold amplitude in respect of the data symbol on the basis of the calculated average amplitude. Next a subset of constellation symbols is determined (310) at least partly on the basis of the at least one threshold, and for which a distance determination will be made. The distance between the position of the data symbol and each of the symbols in the subset of constellation symbols is determined (312) and then a soft bit corresponding to the received symbol is calculated (314) on the basis of said determined distances.
    • 描述了一种计算与由无线电接收机接收的数据符号相对应的至少一个软比特的方法。 在一种形式中,方法(300)包括:计算至少一个接收到的数据符号的平均幅度。 该方法还包括基于所计算的平均幅度来计算(304)相对于数据符号的至少一个阈值幅度。 接下来,至少部分地基于至少一个阈值确定(310)星座符号的子集(310),并且对其进行距离确定。 确定数据符号的位置与星座符号子集中的每个符号之间的距离(312),然后基于所确定的距离计算与接收符号相对应的软比特(314)。
    • 9. 发明申请
    • BLIND EQUALIZER FOR QUADRATURE AMPLITUDE MODULATION(QAM)
    • 用于平衡振幅调制的盲均衡器(QAM)
    • WO2007100348A1
    • 2007-09-07
    • PCT/US2006/030911
    • 2006-08-08
    • CHEN, Xiaopeng
    • CHEN, Xiaopeng
    • H03H7/30H03K5/159
    • H04L27/3845H04L25/03057H04L2025/0342H04L2025/03617
    • Methods and apparatuses for blind equalizers with multiple constant modules. In one embodiment, a circuit, includes: a filter to produce an output based on an input that represents a symbol being received, the symbol being one of a Quadrature Amplitude Modulation (QAM) constellation; a decision engine coupled to the filter to generate a result indicating one region of a plurality of regions in a QAM constellation diagram, the output of the filter being in the indicated region which includes a plurality of symbols of different radii in the constellation diagram; and an error reduction engine coupled to the decision engine and the filter to reduce a difference between a selected one of a plurality of constants and a modulus of the output; where each of the plurality of constants correspond to one of the plurality of regions; and the selected one of the plurality of constants is selected according to the result of the decision engine.
    • 具有多个恒定模块的盲均衡器的方法和装置。 在一个实施例中,电路包括:滤波器,用于基于表示正在接收的符号的输入产生输出,该符号是正交幅度调制(QAM)星座中的一个; 耦合到所述滤波器以产生指示QAM星座图中的多个区域的一个区域的结果的判定引擎,所述滤波器的输出在所述指示区域中,所述指示区域包括星座图中的不同半径的多个符号; 以及错误减少引擎,其耦合到所述决策引擎和所述过滤器,以减少所述多个常数中的所选择的一个和所述输出的模数之间的差; 其中所述多个常数中的每一个对应于所述多个区域中的一个; 并且根据判定引擎的结果选择多个常数中选择的一个。