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    • 118. 发明授权
    • Method and apparatus for computing SIR of time varying signals in a wireless communication system
    • 用于在无线通信系统中计算时变信号的SIR的方法和装置
    • US07974365B2
    • 2011-07-05
    • US12535018
    • 2009-08-04
    • Philip J. Pietraski
    • Philip J. Pietraski
    • H03K9/00H04L27/00
    • H04L1/206H04B17/336
    • A method and apparatus for correcting symbols of a common pilot channel (CPICH) to generate an accurate signal-to-interference ratio (SIR) estimate in a wireless communication system are disclosed. In one embodiment, a non-stationary mean of a group of the CPICH symbols is estimated, the CPICH symbols are delayed, and the CPICH symbols are corrected by dividing the delayed CPICH symbols by the estimated non-stationary mean of the group of CPICH symbols. In another embodiment, a signal power estimate is generated based on the magnitude of CPICH symbols, a noise power estimate is generated by subtracting the signal power estimate from a total power estimate based on the magnitude of the CPICH symbols, and a SIR estimate is generated for symbols that have undergone a time varying gain by dividing the signal power estimate by the noise power estimate.
    • 公开了一种用于校正公共导频信道(CPICH)的符号以在无线通信系统中生成准确的信号干扰比(SIR)估计的方法和装置。 在一个实施例中,估计一组CPICH符号的非平稳平均值,CPICH符号被延迟,并且通过将延迟的CPICH符号除以CPICH符号组的估计非平均平均值来校正CPICH符号 。 在另一个实施例中,基于CPICH符号的大小产生信号功率估计,通过基于CPICH符号的幅度从总功率估计中减去信号功率估计来产生噪声功率估计,并且产生SIR估计 对于通过将信号功率估计除以噪声功率估计而经历了时变增益的符号。
    • 119. 发明授权
    • Method and apparatus for selecting link adaptation parameters for CDMA-based wireless communication systems
    • 用于基于CDMA的无线通信系统选择链路自适应参数的方法和装置
    • US07903614B2
    • 2011-03-08
    • US11740504
    • 2007-04-26
    • Philip J. Pietraski
    • Philip J. Pietraski
    • H04B7/216
    • H04W72/085H04J13/00H04J13/16H04L1/0003H04L1/0015H04L1/0025H04L1/0026H04L1/0066
    • A method and apparatus enhance the selection of transport block set size (TBSS), number of spreading codes, and modulation type, referred to collectively as transport format resource combination (TFRC), in a medium access control (MAC) layer for transmission of data in a code division multiple access (CDMA) wireless communication system, preferably a Universal Mobile Telecommunications Systems (UMTS) high speed downlink packet access (HSDPA) communication system. The maximum number of spreading codes available for transmission and the set of possible TFRCs are preferably determined based on a channel characteristics provided in part by a channel quality indicator (CQI). For each TBSS value in the set of possible TFRCs, a TFRC is selected with the largest number of spreading codes within the maximum number of spreading codes for which the corresponding coding rate is preferably at least ⅓. The corresponding code rate for each selected TFRCs is compared to a threshold to select a corresponding type of modulation. One of the selected TFRCs is selected to be provided to the PHY layer that best matches the CQI and preferably has a maximum TBSS.
    • 方法和装置在用于传输数据的介质访问控制(MAC)层中增强传输块集大小(TBSS),扩展码数量和调制类型的选择,统称为传输格式资源组合(TFRC) 在码分多址(CDMA)无线通信系统中,优选地是通用移动电信系统(UMTS)高速下行链路分组接入(HSDPA)通信系统。 可用于传输的扩展码的最大数量和可能的TFRC的集合优选地基于由信道质量指示符(CQI)部分提供的信道特性来确定。 对于可能的TFRC集合中的每个TBSS值,在扩展码的最大数目内具有最大数量的扩展码的TFRC被选择,其中对应的编码率优选地至少为1/3。 将每个所选TFRC的相应码率与阈值进行比较以选择相应类型的调制。 选择所选择的TFRC中的一个被提供给与CQI最佳匹配的PHY层,并且优选地具有最大TBSS。