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    • 97. 发明申请
    • Interference Control, SINR Optimization and Signaling Enhancements to Improve the Performance of OTDOA Measurements
    • 干扰控制,SINR优化和信令增强,以提高OTDOA测量的性能
    • US20100317343A1
    • 2010-12-16
    • US12813221
    • 2010-06-10
    • Sandeep H. KrishnamurthyRobert T. LoveAljit NimbalkerKenneth A. StewartXiangyang Zhuang
    • Sandeep H. KrishnamurthyRobert T. LoveAljit NimbalkerKenneth A. StewartXiangyang Zhuang
    • H04W4/00
    • H04W24/10G01S1/30G01S5/0236G01S5/10H04L5/005H04L5/0094H04L27/2656H04L43/0852H04W64/00H04W72/044Y02D30/30
    • A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals. The wireless terminal can perform OTDOA measurements subsequent to the reception of the command on a carrier frequency different from the serving cell carrier frequency. A base station transmitter can jointly schedule a reference signal transmission from a plurality of base station transmitters for the purpose of OTD estimation enhancement, and transmit identical reference signals from the plurality of base station transmitters, the reference signals being identical both in the signal sequence and time-frequency resources used for transmission.
    • 无线终端接收属于至少一个具体指定的子帧中的参考信号传输的信令信息,所述信令信息包括列表,所述列表包括基站标识。 终端从列表中的至少一个基站标识确定与来自与所述一个基站相关联的发射基站的观测到达时间差(OTDOA)测量的参考信号传输相关联的时间 - 频率资源 身份 来自发射基站的传输相对于参考定时的到达时间被测量。 无线终端可以接收来自服务小区的命令,以在包含参考信号的频率层(不同于服务频率层的频率层,不包含定位参考信号的服务频率层)开始执行频率间OTDOA测量。 无线终端可以在与服务小区载波频率不同的载波频率上接收到该命令之后执行OTDOA测量。 为了OTD估计增强的目的,基站发射机可以共同安排来自多个基站发射机的参考信号传输,并且从多个基站发射机发送相同的参考信号,参考信号在信号序列和 用于传输的时频资源。
    • 98. 发明授权
    • Method and apparatus for multi-phase component downconversion
    • 多相组件下变频的方法和装置
    • US5422909A
    • 1995-06-06
    • US159399
    • 1993-11-30
    • Robert T. LoveKenneth A. StewartBryan Rapala
    • Robert T. LoveKenneth A. StewartBryan Rapala
    • H04L27/22H04B1/707H04L27/227H04L27/30H03H7/30
    • H04L27/2275H04B1/707
    • The present invention provides a downconverter method and apparatus for downconverting a multiphase modulated signal. The downconverter can be implemented in a multi-phase receiver such as a quadrature receiver. An analog-to-digital converter (103) converts an intermediate frequency signal to a digital signal at a sampling rate. A Hilbert transformation filter (104) and a delay element (105) connected in parallel provide respective passband quadrature and in-phase components of the digital signal. A digital translator (107) alters the passband quadrature and in-phase components based on a predetermined pattern to provide a baseband quadrature signal and a baseband in-phase signal. The digital translator (107) can be a pseudorandom sequence demodulator for demodulating a code division multiple access (CDMA) signal. Various types of DC estimation can also be provided in addition to automatic gain control.
    • 本发明提供一种用于下变频多相位调制信号的下变频器方法和装置。 下变频器可以在诸如正交接收机的多相接收机中实现。 模数转换器(103)以采样速率将中频信号转换为数字信号。 并联连接的希尔伯特变换滤波器(104)和延迟元件(105)提供数字信号的相应通带正交和同相分量。 数字转换器(107)基于预定模式改变通带正交和同相分量,以提供基带正交信号和基带同相信号。 数字转换器(107)可以是用于解码码分多址(CDMA)信号的伪随机序列解调器。 除了自动增益控制之外,还可以提供各种类型的直流估计。