公开(公告)号：EP0726658A2

公开(公告)日：1996-08-14

申请号：EP96300850.3

申请日：1996-02-08

申请人： NOKIA MOBILE PHONES LTD.

发明人： Ostman, Kjell

IPC分类号： H04B1/707 ,  H04J3/06

CPC分类号： H04B1/7085 ,  H04B1/70735 ,  H04L7/042 ,  H04L7/043

摘要： A digital radio communication system includes a receiver for receiving a signal stream that includes data frames, each frame including a data signal sequence and a synchronizing signal sequence. The communication system synchronizes the receiver by employing the signal stream and comprises: a sampling circuit for sampling symbol levels in the synchronizing signal sequence; cross correlation circuitry for comparing values derived from the sampled symbol levels with an expected set of values and producing an error value output; and correction circuitry that is responsive to the error output and produces a sample control output to the sample circuitry to alter the times of sampling of the symbol levels so as to reduce the error output and achieve time synchronization with the received synchronizing signal sequence. A further embodiment of the invention is described in relation to a CDMA receiving system.

摘要翻译： 数字无线电通信系统包括用于接收包括数据帧的信号流的接收机，每个帧包括数据信号序列和同步信号序列。 通信系统通过采用信号流同步接收机，并包括：用于对同步信号序列中的符号电平进行采样的采样电路; 互相关电路，用于将从采样符号级别导出的值与期望的值集合进行比较并产生误差值输出; 以及校正电路，其响应于所述误差输出并且产生对所述采样电路的采样控制输出，以改变所述符号电平的采样次数，以便减少所述误差输出并实现与所接收的同步信号序列的时间同步。 关于CDMA接收系统描述本发明的另一实施例。

公开(公告)号：EP0726658A3

公开(公告)日：2001-08-08

申请号：EP96300850.3

申请日：1996-02-08

申请人： NOKIA MOBILE PHONES LTD.

发明人： Ostman, Kjell

IPC分类号： H04B1/707 ,  H04J3/06

CPC分类号： H04B1/7085 ,  H04B1/70735 ,  H04L7/042 ,  H04L7/043

摘要： A digital radio communication system includes a receiver for receiving a signal stream that includes data frames, each frame including a data signal sequence and a synchronizing signal sequence. The communication system synchronizes the receiver by employing the signal stream and comprises: a sampling circuit for sampling symbol levels in the synchronizing signal sequence; cross correlation circuitry for comparing values derived from the sampled symbol levels with an expected set of values and producing an error value output; and correction circuitry that is responsive to the error output and produces a sample control output to the sample circuitry to alter the times of sampling of the symbol levels so as to reduce the error output and achieve time synchronization with the received synchronizing signal sequence. A further embodiment of the invention is described in relation to a CDMA receiving system.

公开(公告)号：EP0617532A1

公开(公告)日：1994-09-28

申请号：EP94302041.2

申请日：1994-03-22

申请人： NOKIA MOBILE PHONES LTD.

发明人： Tiittanen, Erkki ,  Mattila, Heikki ,  Rautava, Tapio ,  Matero, Jorma ,  Ostman, Kjell ,  Halttunen, Mikko

IPC分类号： H04L27/20

CPC分类号： H04L27/364 ,  H03C3/406 ,  H04B1/0475 ,  H04L27/2071

摘要： Method and system, for calibrating a vector modulator that does not require a network analyzer, are disclosed which are incorporated in a vector modulation system comprising a standard vector modulator circuit including means for shifting phase to adjust the relative phases of the I and Q components of the modulated RF carrier. Means for attenuating are included in the I and Q modulation system to adjust the relative amplitude of the modulation signals. The disclosure describes a technique wherein the microwave transmitter's I and Q phase difference is measured by measuring the power levels of selected frequencies of the RF output signal. The power levels are compared and a correction value is stored in a read-only memory to compensate for the error. More particularly, the error compensation is achieved by first determining amplitude error or unbalance by I and Q signal power measurement and an amplitude compensation signal is stored, then a power measurement is carried out for phase compensation and a phase compensation signal is stored.

摘要翻译： 公开了用于校准不需要网络分析器的矢量调制器的方法和系统，其被并入矢量调制系统中，该矢量调制系统包括标准矢量调制器电路，包括用于移相的装置，以调整I和Q分量的相对相位 调制的RF载波。 在I和Q调制系统中包括用于衰减的装置，以调整调制信号的相对幅度。 本公开描述了一种技术，其中通过测量RF输出信号的选定频率的功率电平来测量微波发射器的I和Q相位差。 功率电平进行比较，校正值存储在只读存储器中以补偿误差。 更具体地，通过首先通过I和Q信号功率测量来确定振幅误差或不平衡来存储误差补偿，并且存储幅度补偿信号，然后执行功率测量以进行相位补偿，并且存储相位补偿信号。

公开(公告)号：EP1176732A2

公开(公告)日：2002-01-30

申请号：EP01117093.3

申请日：2001-07-13

申请人： NOKIA MOBILE PHONES LTD.

发明人： Niva, Ilkka ,  Jansen, Kaj ,  Ostman, Kjell

IPC分类号： H04B1/707

CPC分类号： H04B1/7117 ,  H04B1/7073 ,  H04B1/7085

摘要： The present invention provides a method and a device in which two or more fingers of a RAKE receiver can locked to a multipath received signal in a situation of fat finger impulse response. One embodiment of the present invention assigns two RAKE fingers to an impulse response so that one finger is tracking the impulse response with Early-Ontime DLL method and the other finger is tracking the impulse response with Ontime-Late DLL method. The method comprises detecting the delay between the received signal and its delayed version, comparing the delay with a pre-determined threshold and in the case when the delay falls below the threshold, changing the tracking method of the delayed version of the received signal to a second tracking method.

摘要翻译： 本发明提供一种方法和装置，其中RAKE接收机的两个或更多个手指可以在胖指脉冲响应的情况下锁定到多径接收信号。 本发明的一个实施例将两个RAKE手指分配给脉冲响应，使得一个手指利用Early-Ontime DLL方法跟踪脉冲响应，另一个手指利用Ontime-Late DLL方法跟踪脉冲响应。 该方法包括检测接收信号与其延迟版本之间的延迟，将延迟与预定阈值进行比较，并且在延迟低于阈值的情况下，将接收信号的延迟版本的跟踪方法改变为 第二跟踪方法。