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    • 4. 发明申请
    • Efficient frame tracking in mobile receivers
    • 移动接收机中高效的帧跟踪
    • US20050197160A1
    • 2005-09-08
    • US11110164
    • 2005-04-20
    • Aykut BultanJohn HaimDonald Grieco
    • Aykut BultanJohn HaimDonald Grieco
    • H04B7/26H04B7/02
    • H04B1/7117H04B1/7073H04B1/70754H04B1/708H04B1/7095H04B2201/70701
    • A method for determining the validity of a most significant path in a wireless communication system wherein data is transmitted in frame units in a multipath environment begins by accumulating a correlated data sequence N times, each time at a frame offset apart from the previous time. A preliminary noise estimate (PNE) is calculated as an average of the accumulated data values. A preliminary noise threshold (PNT) is calculated according to the equation C1×PNE. A final noise estimate (FNE) is calculated as the average of accumulated data values below the PNT. A final noise threshold (FNT) is calculated according to the equation C2×FNE. The validity of the most significant path is determined if the most significant path value is greater than the FNT.
    • 用于确定无线通信系统中最重要路径的有效性的方法,其中以多路径环境中的帧为单位传输数据的开始是通过累积相关数据序列N次,每次与之前的时间相隔一帧偏移。 初步噪声估计(PNE)被计算为累积数据值的平均值。 根据等式C 1 xPNE计算初步噪声阈值(PNT)。 最终噪声估计(FNE)被计算为低于PNT的累积数据值的平均值。 根据等式C 2 xFNE计算最终噪声阈值(FNT)。 如果最显着的路径值大于FNT,则确定最重要路径的有效性。
    • 5. 发明申请
    • Efficient frame tracking in mobile receivers
    • 移动接收机中高效的帧跟踪
    • US20050070318A1
    • 2005-03-31
    • US10733952
    • 2003-12-10
    • Aykut BultanJohn HaimDonald Grieco
    • Aykut BultanJohn HaimDonald Grieco
    • H04B7/26H04B7/005
    • H04B1/7117H04B1/7073H04B1/70754H04B1/708H04B1/7095H04B2201/70701
    • A method for frame synchronization of a receiver in a wireless communication system wherein data is transmitted in frame units in a multipath environment begins by extracting data samples for a predetermined window size. A training sequence corresponding to a given cell parameter is generated. The data is correlated with the training sequence over different lags to locate the position of the first significant path, which defines the beginning of the frame. The correlated data is accumulated N times for each lag position to produce at least one accumulation vector. A most significant path value and position is determined that is the largest value among the accumulation vectors. A frame synchronization correction value is calculated based on the difference between the first significant path position and a constant called frame offset. The frame synchronization is adjusted based upon the frame synchronization correction value.
    • 一种在无线通信系统中的接收机的帧同步方法,其中数据在多路径环境中以帧为单位发送,通过提取预定窗口大小的数据样本开始。 产生与给定单元参数对应的训练序列。 数据与不同延迟的训练序列相关,以定位第一个有效路径的位置,其定义了帧的开始。 相关数据对于每个滞后位置累积N次以产生至少一个累加向量。 确定最重要的路径值和位置是累加向量中最大的值。 基于第一有效路径位置和称为帧偏移的常数之间的差来计算帧同步校正值。 基于帧同步校正值来调整帧同步。
    • 6. 发明申请
    • Method and apparatus for adaptively selecting sampling frequency for analog-to-digital conversion
    • 用于自适应地选择模数转换的采样频率的方法和装置
    • US20060045126A1
    • 2006-03-02
    • US11167341
    • 2005-06-27
    • Gerard KlahnFryderyk TyraJohn HaimTanbir Haque
    • Gerard KlahnFryderyk TyraJohn HaimTanbir Haque
    • H04J3/16
    • H04B1/28H04B1/0021
    • The present invention is related to a method and apparatus for adaptively selecting local oscillator (LO) and sampling frequencies for analog-to-digital conversion of a plurality of input signals for transmitting two or more services via two or more frequency bands. Each input signal carries a different service via a different frequency band. Each service is subject to a minimum signal-to-interference, noise and distortion ratio (SINAD) requirement. The input signals are converted to an intermediate frequency (IF) band signals by mixing the input signals with LO signals. The LO and sampling frequencies are adjusted such that the converted IF band signals of the input signals are spectrally adjacent or overlapping each other to some degree. SINAD of the services is measured at each of a plurality of spectrally overlapping conditions. The LO frequencies and the sampling frequency are then adjusted based on the SINAD measurement results.
    • 本发明涉及用于自适应地选择本地振荡器(LO)的采样频率和用于多个输入信号的模数转换的采样频率,用于经由两个或多个频带发送两个或多个服务。 每个输入信号经由不同的频带承载不同的服务。 每个服务都受到最小的信号干扰,噪声和失真比​​(SINAD)要求。 输入信号通过将输入信号与LO信号混合而转换成中频(IF)频带信号。 调整LO和采样频率使得输入信号的转换的IF频带信号在某种程度上彼此频谱相邻或重叠。 在多个频谱重叠条件中的每一个处测量服务的SINAD。 然后根据SINAD测量结果调整LO频率和采样频率。
    • 10. 发明申请
    • EFFICIENT JOINT DETECTION
    • 有效的联合检测
    • US20080062860A1
    • 2008-03-13
    • US11926534
    • 2007-10-29
    • Jaeyoung KwakJohn HaimAriela ZeiraJung-Lin Pan
    • Jaeyoung KwakJohn HaimAriela ZeiraJung-Lin Pan
    • H04J11/00
    • H04B1/71052H04B2201/70707
    • K data signals, or bursts, are transmitted over a shared spectrum in a code division multiple access communication format. A combined signal is received and sampled over the shared spectrum, as a plurality of received vector versions. The combined signal includes the K transmitted data signals. A plurality of system matrices and an associated covariance matrix using codes and estimated impulse responses of the K data signals is produced. Each system matrix corresponds to a received vector version. The system and covariance matrices are extended and approximated as block circulant matrices. A diagonal matrix of each of the; extended and approximated system and covariance matrices are determined by prime factor algorithm—fast Fourier transform (PFA-FFT) without division of the matrix. The received vector versions are extended. A product of the diagonal matrices and the extended received vector versions is taken. An inverse block discrete Fourier transform is performed by a PFA-FFT on a result of the product to produce the estimated data of the K data signals.
    • K个数据信号或脉冲串以码分多址通信格式通过共享频谱发送。 组合信号在共享频谱上被接收和采样,作为多个接收的矢量版本。 组合信号包括K个发送的数据信号。 产生多个系统矩阵和使用K个数据信号的代码和估计的脉冲响应的相关协方差矩阵。 每个系统矩阵对应于接收到的矢量版本。 系统和协方差矩阵被扩展和近似为块循环矩阵。 每个的对角矩阵; 扩展和近似系统和协方差矩阵通过素数因子算法 - 快速傅里叶变换(PFA-FFT)来确定,而不分割矩阵。 收到的矢量版本被扩展。 采用对角矩阵和扩展接收向量版本的乘积。 通过PFA-FFT对乘积的结果执行逆块离散傅里叶变换,以产生K个数据信号的估计数据。