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    • 7. 发明申请
    • METHOD AND APPARATUS FOR CANCELING PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM
    • 在无线通信系统中取消导频干扰的方法和装置
    • WO2002099992A1
    • 2002-12-12
    • PCT/US2002/018133
    • 2002-06-06
    • QUALCOMM INCORPORATED
    • LEVIN, Jeffrey, A.WILBORN, Thomas, B.BUTLER, Brian, K.BENDER, Paul, E.
    • H04B1/707
    • H04B1/7107H04B2201/70701
    • Techniques for canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence to provide the estimated plot interference. The pilot interference estimates due to all interfering multipaths are combined to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.
    • 用于在无线(例如CDMA)通信系统中消除导频干扰的技术。 在一种方法中,最初处理包括多个信号实例(每个包括导频)的接收信号以提供数据样本。 每个信号实例的导频干扰可以通过用信号实例的扩展序列解扩数据样本来估计,对解扩数据进行信道化以提供导频符号,对导频符号进行滤波以估计信号实例的信道响应,并将估计信道 响应与扩展序列提供估计的图干扰。 由于所有干扰多径导致的导频干扰估计被组合以导出总导频干扰,其从数据样本中减去以提供导频取消的数据样本。 然后处理这些样本以便为接收信号中的至少一个(期望的)信号实例中的每一个导出解调数据。
    • 10. 发明申请
    • METHOD AND SYSTEM FOR NON-ORTHOGONAL NOISE ENERGY BASED GAIN CONTROL
    • 基于非正弦噪声能量的增益控制方法与系统
    • WO1997008848A1
    • 1997-03-06
    • PCT/US1996013653
    • 1996-08-23
    • QUALCOMM INCORPORATED
    • QUALCOMM INCORPORATEDBENDER, Paul, E.EDMONSTON, Brian, E.
    • H04B07/005
    • H04W52/24H04B1/707
    • A novel and improved method and system for processing multiple instances of data using noise energy based gain control is described. A signal (100) is transmitted from a base station and is received along with associated noise energy by a subscriber unit (104). The non-orthogonal noise energy associated with a signal (100) transmitted to a subscriber unit (104) is measured, and the gain of that signal is adjusted such that the non-orthogonal noise energy is set to a predetermined level. If multiple instances of the signal (100) are received by the subscriber unit (104), the signals are isolated and the non-orthogonal noise associated with each signal is measured separately. In the preferred embodiment the non-orthogonal noise measurement is performed by demodulation (308) of a low energy channel within a forward link signal (100) processed in accordance with code division multiple access signal processing techniques. A reference value is then divided by the result of this demodulation (308) to calculate a control signal (320) which is used to adjust the gain of a signal associated with a second, higher energy, channel within the forward link signal. The reference value may be generated via the use of stored information (319), or via measurement of another signal that has previously been adjusted to a more optimal energy level.
    • 描述了使用基于噪声能量的增益控制来处理多个数据实例的新颖和改进的方法和系统。 从基站发送信号(100),并由用户单元(104)与相关联的噪声能量一起被接收。 测量与发送到用户单元(104)的信号(100)相关联的非正交噪声能量,并且调整该信号的增益,使得非正交噪声能量被设置为预定水平。 如果用户单元(104)接收到信号(100)的多个实例,则信号被隔离,并且分别测量与每个信号相关联的非正交噪声。 在优选实施例中,通过根据码分多址信号处理技术处理的前向链路信号(100)内的低能量信道的解调(308)来执行非正交噪声测量。 然后将参考值除以该解调结果(308),以计算用于调整与前向链路信号内的第二较高能量信道相关联的信号的增益的控制信号(320)。 参考值可以通过使用存储的信息(319)生成,或者通过先前被调整到更优化的能级的另一个信号的测量产生。