公开(公告)号：US20070155354A1

公开(公告)日：2007-07-05

申请号：US11359524

申请日：2006-02-23

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04B7/00 ,  H04B1/10

CPC classification number: H04B17/3912 ,  H04B17/345 ,  H04L1/06 ,  H04L25/0305 ,  H04L2025/03477 ,  H04L2025/03605

Abstract: The invention relates to interference cancellation in a receiver in a radio system. The receiver receives at least two input data signals, and extracts an interference estimate signal specific to each input data signal. An interference estimate signal covariance matrix is calculated, and autoregressive parameters and covariance parameters are estimated from the covariance matrix. Interference is canceled from the at least two input data signals by finite impulse response filters using the estimated parameters as filter coefficients in the finite impulse response filters.

Abstract translation: 本发明涉及无线电系统中的接收机中的干扰消除。 接收器接收至少两个输入数据信号，并且提取对每个输入数据信号特有的干扰估计信号。 计算干扰估计信号协方差矩阵，并根据协方差矩阵估计自回归参数和协方差参数。 通过有限脉冲响应滤波器使用估计参数作为有限脉冲响应滤波器中的滤波器系数，从至少两个输入数据信号中消除干扰。

公开(公告)号：US06763010B1

公开(公告)日：2004-07-13

申请号：US09331994

申请日：1999-07-26

Applicant: Olli Piirainen ,  Kari Niemelä

Inventor： Olli Piirainen ,  Kari Niemelä

IPC: H04J300

CPC classification number: H04L5/12 ,  H04B7/2643 ,  H04L5/22

Abstract: The invention relates to a multiplexing method and a transceiver used in a TDMA radio system. The transceiver sets up a connection to another transceiver by transmitting modulated signals in time slots. The transceiver comprises coding means for channel-coding a signal that consists of bits and that is formed into a communication signal, and interleaving means for interleaving the bits of the channel-coded Signal into blocks of a predetermined size. The transceiver also comprises multiplexing means that receive blocks from the interleaving means and that multiplex the interleaved blocks of at least two channel-coded signals together. The transceiver further comprises modulation means for modulating the blocks multiplexed by the multiplexing means with at least four-level modulation before the modulated signal blocks are transmitted as a communication signal in a time slot, so that the transmission speed of the communication signal and the number of the connections to be established can be increased.

Abstract translation: 本发明涉及在TDMA无线电系统中使用的复用方法和收发机。 收发器通过在时隙中发送调制信号来建立与另一收发器的连接。 收发器包括用于对由比特构成并形成通信信号的信号进行信道编码的编码装置，以及用于将信道编码信号的比特交织成预定大小的块的交织装置。 该收发机还包括从交织装置接收块并将至少两个信道编码信号的交织块复用在一起的复用装置。 收发器还包括调制装置，用于在调制信号块作为通信信号在时隙中发送之前，用至少四级调制来调制由多路复用装置多路复用的块，从而通信信号的传输速度和数量 要建立的连接可以增加。

公开(公告)号：US06748031B1

公开(公告)日：2004-06-08

申请号：US09503016

申请日：2000-02-11

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03D100

CPC classification number: H04B7/005 ,  H04B7/01 ,  H04L25/0238

Abstract: The invention relates to a method for parameter estimation in a digital radio system receiver, and a receiver. The receiver comprises a detector generating a number describing the probability of a received symbol using soft decision metrics. Mean values of the numbers describing the received symbol probability by which an estimator generates a new channel estimate are generated. As the energy of different symbols varies the channel estimate to be generated is weighted by the symbol energy to be generated. The channel estimate change can be attenuated by averaging or by multiplying the change by a weighting value. The channel estimate of the invention can also be used in the estimation of other data communication parameters whereby, for example, the Doppler error can be corrected.

Abstract translation: 本发明涉及数字无线电系统接收机和接收机中的参数估计方法。 该接收机包括检测器，该检测器使用软判决度量来描述接收到的符号的概率。 产生描述估计器产生新的信道估计的接收符号概率的数字的平均值。 随着不同符号的能量变化，要产生的信道估计被要产生的符号能量加权。 信道估计变化可以通过平均或乘以加权值来减弱。 本发明的信道估计也可以用于估计其他数据通信参数，从而例如可以校正多普勒误差。

公开(公告)号：US06473594B1

公开(公告)日：2002-10-29

申请号：US09155707

申请日：1998-10-02

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04Q720

CPC classification number: H04B7/01

Abstract: In a mobile communication system, signals which are transmitted from mobile stations moving relative to a base station are subject to a Doppler effect. A technique is described for compensating for that Doppler effect in the received signal, depending on the channel conditions for the received signal. Thus, the Doppler shift compensation is implemented only or mainly in good enough channel conditions.

Abstract translation: 在移动通信系统中，从相对于基站移动的移动台发送的信号受到多普勒效应。 描述了根据接收信号的信道条件来补偿接收信号中的多普勒效应的技术。 因此，多普勒频移补偿仅实现或主要在足够好的通道条件下实现。

公开(公告)号：US06425105B1

公开(公告)日：2002-07-23

申请号：US09550676

申请日：2000-04-17

Applicant: Olli Piirainen ,  Arto Savuoja

Inventor： Olli Piirainen ,  Arto Savuoja

IPC: H04L102

CPC classification number: H04L1/1835 ,  H04L1/0002 ,  H04L1/1803 ,  H04L1/1806 ,  H04L1/1809 ,  H04L1/1819 ,  Y02D50/10

Abstract: An error control apparatus and method is disclosed, wherein a control message is used to request a retransmission of a received erroneous digital signal transmitted in a first direction via a transmission medium. The control message is transmitted in a second direction of said transmission medium, wherein the transmission rate of the control method is controlled in dependence on a usage of the transmission medium in the second direction and/or an amount of available memory in a receiving means (5) for receiving said digital signal. Thereby, the overall data throughout in the first and second direction can be optimized by changing the rate of the control message.

Abstract translation: 公开了一种误差控制装置和方法，其中使用控制消息来经由传输介质请求在第一方向上发送的接收到的错误数字信号的重传。 所述控制消息在所述传输介质的第二方向上发送，其中控制方法的传输速率根据传输介质在第二方向上的使用和/或接收装置中可用存储器的量（ 5）用于接收所述数字信号。 因此，可以通过改变控制消息的速率来优化整个在第一和第二方向上的整体数据。

公开(公告)号：US06385256B1

公开(公告)日：2002-05-07

申请号：US09355748

申请日：1999-10-13

Applicant: Olli Piirainen ,  Kari Niemelä

Inventor： Olli Piirainen ,  Kari Niemelä

IPC: H04L2712

CPC classification number: H04L27/2007

Abstract: The invention relates to a method and arrangement for modulating a signal to be transmitted, the arrangement comprising an encoder and a frequency modulator. In order to enable high rate transmission in a flexible manner in a narrow frequency band, the encoder (104) is a differential encoder and before the frequency modulator, the arrangement comprises means for multiplying the signal to be transmitted by a factor of the form &pgr;/(2m), where m is a positive integer greater than one.

Abstract translation: 本发明涉及一种用于调制要发射的信号的方法和装置，该装置包括编码器和频率调制器。 为了在窄频带中以灵活的方式实现高速率传输，编码器（104）是差分编码器，并且在频率调制器之前，该装置包括用于将待传输的信号乘以像素的形式的装置 /（2m），其中m是大于1的正整数。

公开(公告)号：US06192238B1

公开(公告)日：2001-02-20

申请号：US09029649

申请日：1998-03-02

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04Q720

CPC classification number: H04L1/20 ,  H04B1/1027 ,  H04B7/0857 ,  H04L1/06

Abstract: The invention relates to a receiving method in a digital cellular radio system. The invention further relates to a receiver of the cellular radio network. In computing the signal to noise ratio, a reference signal is utilized which is the convolution of the estimated impulse response of a channel and the predetermined sequence. The signal to noise ratio is obtained as a ratio between the variance of the reference signal and the predetermined sequence received from the channel. The signal to noise ratio is used for weighing the diversity branches of the diversity receiver.

Abstract translation: 本发明涉及数字蜂窝无线电系统中的接收方法。 本发明还涉及蜂窝无线电网络的接收机。 在计算信噪比时，使用参考信号，该参考信号是通道的估计脉冲响应与预定序列的卷积。 获得信噪比作为参考信号的方差与从信道接收到的预定顺序之间的比率。 信噪比用于称量分集接收机的分集分支。

公开(公告)号：US5786703A

公开(公告)日：1998-07-28

申请号：US624423

申请日：1996-04-01

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: G01R31/28 ,  G01R31/3185 ,  G06F11/22 ,  H01L21/82

CPC classification number: G01R31/318555

Abstract: A method for testing an integrated circuit that has a testing portion for testing the circuit card and/or other circuits connected to the integrated circuit after the integrated circuit has been assembled onto the circuit card, inputs for controlling the testing portion, and test structures for testing the internal operations of the integrated circuit. To keep the number of the inputs to the circuit low, a test mode is defined for the testing portion, in which test mode one of the inputs of the testing portion is connected to the test structures for the internal operations of the integrated circuit, and when the internal operations of the integrated circuit are tested, the testing portion is set in the test mode, whereupon the internal test structures of the integrated circuit can be controlled from the input of the testing portion.

Abstract translation: PCT No.PCT / FI94 / 00439 Sec。 371日期：1996年4月1日 102（e）日期1996年4月1日PCT 1994年9月30日PCT PCT。 WO95 / 10048 PCT出版物 日期1995年04月13日一种用于测试集成电路的方法，该集成电路具有用于测试电路卡和/或连接到集成电路的其它电路的测试部分，该集成电路已经组装到电路卡上，用于控制测试部分 ，以及用于测试集成电路内部操作的测试结构。 为了将电路的输入数保持为低电平，为测试部分定义测试模式，其中测试模式的一个输入与集成电路的内部操作的测试结构连接， 当测试集成电路的内部操作时，将测试部分设置在测试模式中，由此可以从测试部分的输入端控制集成电路的内部测试结构。

公开(公告)号：US07889798B2

公开(公告)日：2011-02-15

申请号：US10627962

申请日：2003-07-28

Applicant: Olli Piirainen ,  Miia Karjalainen

Inventor： Olli Piirainen ,  Miia Karjalainen

IPC: H04K1/10

CPC classification number: H04L27/2624 ,  H03G11/00

Abstract: A method of reducing the peak-to-mean ratio of a multi-carrier signal includes the steps of: generating a residual signal from the multicarrier signal, the residual signal representing the difference between the multicarrier signal and a hard-clipped multicarrier signal. The method also includes the steps of applying a least squares function to the residual signal for each carrier of the multi-carrier signal, thereby generating a minimized residual signal for each carrier and combining the minimized residual signals and the multicarrier signal.

Abstract translation: 降低多载波信号的峰均比的方法包括以下步骤：从多载波信号产生残差信号，残差信号表示多载波信号与硬限幅多载波信号之间的差。 该方法还包括以下步骤：对于多载波信号的每个载波对剩余信号应用最小二乘函数，从而为每个载波生成最小化的残余信号，并组合最小化的残余信号和多载波信号。

公开(公告)号：US07653160B2

公开(公告)日：2010-01-26

申请号：US11266359

申请日：2005-11-04

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L1/00 ,  H04L1/02 ,  H04L1/10 ,  H04L7/02 ,  H04J11/00

CPC classification number: H04B1/1027 ,  H04B17/373

Abstract: The invention relates to a method of estimating a noise and interference covariance matrix and to a receiver. The method comprises: estimating an initial noise and interference covariance matrix on the basis of a received signal; reducing the impact of the background noise of the receiver from the initial noise and interference covariance matrix for obtaining a residual matrix; accepting the obtained residual matrix when the residual matrix is at least approximately positive semidefinite; modifying the obtained residual matrix such that the positive semidefinity of the residual matrix is achieved when the residual matrix is not at least approximately positive semidefinite; and adding the impact of background noise back to the residual matrix for estimating a final noise and interference covariance matrix.

Abstract translation: 本发明涉及一种估计噪声和干扰协方差矩阵和接收机的方法。 该方法包括：基于接收信号估计初始噪声和干扰协方差矩阵; 从初始噪声和干扰协方差矩阵减小接收机的背景噪声对获得残余矩阵的影响; 当残余矩阵至少约为正半定数时，接受所获得的残余矩阵; 修改所获得的残余矩阵，使得当残余矩阵不至少近似为正半固定时，实现残余矩阵的正半精度; 并将背景噪声的影响加回到残差矩阵中，以估计最终的噪声和干扰协方差矩阵。