公开(公告)号：US06473473B1

公开(公告)日：2002-10-29

申请号：US09171683

申请日：1998-10-22

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L2706

CPC classification number: H04B7/0865

Abstract: The invention relates to a method for estimating the quality of a connection and a diversity combination method in a digital radio system in which the signals transmitted are in burst form, the bursts comprising a training sequence; and to a receiver comprising a filter matched to the received signal. To effect simple estimation of the quality of the connection, the receiver comprises means for forming a result vector of at most the length of the training sequence from the symbols of the output signal of the matched filter and the corresponding symbols of the training sequence; means for computing a mean value and variance for the symbols of the result vector; and means for forming a quantity proportional to signal quality as a quotient of the squared mean value of the result vector and the variance of the result vector.

Abstract translation: 本发明涉及一种用于在数字无线电系统中估计连接质量和分集组合方法的方法，其中所发射的信号是突发形式，所述突发包括训练序列; 以及包括与接收信号匹配的滤波器的接收机。 为了实现连接质量的简单估计，接收机包括用于从匹配滤波器的输出信号的符号和训练序列的对应符号形成训练序列的长度最多的结果向量的装置; 用于计算结果向量的符号的平均值和方差的装置; 以及用于形成与信号质量成比例的量作为结果向量的平均值和结果向量的方差的商的装置。

公开(公告)号：US06421402B1

公开(公告)日：2002-07-16

申请号：US09101754

申请日：1998-07-16

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04B1700

CPC classification number: H04L25/0228 ,  H04L25/0202 ,  H04L25/0212

Abstract: The invention relates to a method for estimating an impulse response, and a receiver whose received signal is formed of bursts comprising a training sequence and the receiver comprising analog-to-digital converter for sampling the received signal and signal processor for measuring a DC offset in the samples. To simplify the receiver structure, the receiver comprises a calculating device for calculating the impulse response by correlating the samples taken with the training sequence before removing the DC offset, and the signal processor for removing the DC offset effect from the calculated impulse response.

Abstract translation: 本发明涉及一种用于估计脉冲响应的方法，以及接收机，其接收信号由包括训练序列的脉冲组成，接收机包括用于对接收到的信号进行采样的模数转换器和用于测量直流偏移的信号处理器 样品。 为了简化接收机结构，接收机包括一个计算装置，用于通过将在删除DC偏移之前与训练序列相乘的样本相关联来计算脉冲响应，以及信号处理器，用于从计算的脉冲响应中去除DC偏移效应。

公开(公告)号：US06385254B1

公开(公告)日：2002-05-07

申请号：US09401019

申请日：1999-09-21

Applicant: Olli Piirainen ,  Kari Niemelä

Inventor： Olli Piirainen ,  Kari Niemelä

IPC: H04L512

CPC classification number: H04L1/0038 ,  H04L1/0003 ,  H04L1/0032 ,  H04L27/0012 ,  Y02D50/10

Abstract: The invention relates to a data transmission method and a radio system implementing method. A transmitter has at least two modulation methods by which it can modulate a signal. One or more demodulators (106) of the receiver demodulates the received signal in a manner which corresponds to each modulation method used. The modulation method used for the signal is inferred in a reference block (110) from the impulse response estimate. The signal according to the inferred modulation method is detected in a detector (114).

Abstract translation: 本发明涉及数据传输方法和无线电系统实现方法。 发射机具有至少两种可以调制信号的调制方式。 接收机的一个或多个解调器（106）以对应于所使用的各种调制方式的方式解调接收的信号。 用于信号的调制方法从脉冲响应估计在参考块（110）中推断。 在检测器（114）中检测根据推断的调制方法的信号。

公开(公告)号：US08081717B2

公开(公告)日：2011-12-20

申请号：US12069524

申请日：2008-02-11

Applicant: Juha P Karjalainen ,  Markku Vainikka ,  Olli Piirainen

Inventor： Juha P Karjalainen ,  Markku Vainikka ,  Olli Piirainen

IPC: H04L27/06

CPC classification number: H04W56/0045 ,  H04B7/2681 ,  H04L7/0054

Abstract: An apparatus includes a radio frequency receiver and a timing adjustment unit that contains at least two channel impulse response estimators. The at least two channel impulse response estimators include an on-time estimator and at least one of an early estimator and a late estimator. The apparatus also includes a calculation unit that is configurable to obtain a channel estimate for each measured channel impulse response and to average obtained channel estimates over a plurality of received signal events to determine a timing adjustment in accordance with residual signal power.

Abstract translation: 一种装置包括射频接收机和包含至少两个信道脉冲响应估计器的定时调整单元。 所述至少两个信道脉冲响应估计器包括接通时间估计器和早期估计器和后期估计器中的至少一个。 该装置还包括计算单元，其可配置为获得针对每个测量的信道脉冲响应的信道估计，并且在多个接收信号事件上平均获得的信道估计，以根据剩余信号功率确定定时调整。

公开(公告)号：US20080212666A1

公开(公告)日：2008-09-04

申请号：US11712474

申请日：2007-03-01

Applicant: Kiran Kuchi ,  Olli Piirainen ,  Olav Tirkkonen

Inventor： Kiran Kuchi ,  Olli Piirainen ,  Olav Tirkkonen

IPC: H03K5/159

CPC classification number: H04L25/0228 ,  H04B7/0413 ,  H04B17/345 ,  H04L27/2647

Abstract: An interference rejection algorithm for a radio receiver is presented. According to the present solution a signal comprising a training sequence and a data sequence is received at the radio receiver. A radio channel response may be estimated from the received training sequence, and interference parameters may be estimated from at least one of the received training sequence and the received data sequence, the estimation of the interference parameters comprising smoothing a frequency spectrum of at least one of the estimated channel response and the estimated interference parameters through averaging. Then, frequency domain interference suppression weights are calculated from the estimated channel response and the interference parameters, and weighting of the received data sequence is carried out with the calculated weights.

Abstract translation: 提出了无线电接收机的干扰抑制算法。 根据本解决方案，在无线电接收机处接收包括训练序列和数据序列的信号。 可以从接收到的训练序列估计无线电信道响应，并且可以从接收到的训练序列和接收的数据序列中的至少一个估计干扰参数，干扰参数的估计包括平滑以下中的至少一个的频谱： 通过平均估计的信道响应和估计的干扰参数。 然后，根据估计的信道响应和干扰参数计算频域干扰抑制权重，并且使用所计算的权重来执行接收数据序列的加权。

公开(公告)号：US20060154622A1

公开(公告)日：2006-07-13

申请号：US11074006

申请日：2005-03-08

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04B1/04 ,  H04B17/00

CPC classification number: H04L27/2623 ,  H03F1/0205 ,  H03F1/32 ,  H03F2201/3236 ,  H04B1/04 ,  H04B2001/0416

Abstract: A transmitter clips a transmission signal before transmission in order to reduce the strength of at least one peak of the transmission signal exceeding a predetermined threshold. The transmitter includes a clipper having a minimizer, a filter and an adder. The minimizer minimizes of a cost function with respect to an optimization signal, the cost function having weighted terms as a function of the optimization signal. The terms relate to an effective modulation distortion and an effective overshoot exceeding the predetermined threshold. The filter forms a clipping signal by filtering the optimization signal formed as a result of the minimization according to the spectrum emission mask requirements of the radio system. The adder subtracts the clipping signal from the transmission signal.

Abstract translation: 发射机在传输之前剪切传输信号，以便减少超过预定阈值的传输信号的至少一个峰值的强度。 发射机包括具有最小化器，滤波器和加法器的限幅器。 最小化器相对于优化信号最小化成本函数，成本函数具有作为优化信号的函数的加权项。 这些术语涉及超过预定阈值的有效调制失真和有效超调。 滤波器通过根据无线电系统的频谱发射掩模要求对作为最小化的结果形成的优化信号进行滤波来形成限幅信号。 加法器从发送信号中减去削波信号。

公开(公告)号：US06954495B2

公开(公告)日：2005-10-11

申请号：US09998183

申请日：2001-12-03

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L27/01 ,  H04B7/005 ,  H04B17/00 ,  H04L25/03 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/03006 ,  H04B17/309

Abstract: A method for carrying out channel equalization in a radio receiver wherein an impulse response is estimated, noise power is determined by estimating a co-variance matrix of the noise contained in a received signal before prefiltering, and tap coefficients of prefilters and an equalizer are calculated. The method comprises determining the noise power after prefiltering by estimating a noise covariance matrix, after which input signals of the channel equalizer are weighted by weighting coefficients obtained from the noise covariance estimation.

Abstract translation: 一种用于在无线电接收机中执行信道均衡的方法，其中估计出脉冲响应，通过估计包含在预滤波之前的接收信号中的噪声的协方差矩阵来确定噪声功率，并且计算预滤波器和均衡器的抽头系数 。 该方法包括通过估计噪声协方差矩阵来确定预滤波后的噪声功率，之后通过从噪声协方差估计获得的加权系数来加权信道均衡器的输入信号。

公开(公告)号：US06654844B1

公开(公告)日：2003-11-25

申请号：US09423134

申请日：2000-02-04

Applicant: Olli Piirainen ,  Aki Happonen

Inventor： Olli Piirainen ,  Aki Happonen

IPC: G06F1300

CPC classification number: G06F13/4213

Abstract: The invention relates to a method and arrangement for connecting a processor to an ASIC. In the arrangement, the processor generates control signals employed when the processor reads data from and writes data to the ASIC. The arrangement comprises means (10) for receiving control signals from the processor and generating read and write signals on the basis of the received signals. The means (10) are implemented by an asynchronous state machine that changes its state on the basis of the received signals. The means (10) change their state without a synchronizing clock signal.

Abstract translation: 本发明涉及将处理器连接到ASIC的方法和装置。 在该布置中，处理器产生当处理器从ASIC读取数据并向ASIC写入数据时所采用的控制信号。 该装置包括用于从处理器接收控制信号并基于接收到的信号产生读取和写入信号的装置（10）。 所述装置（10）由异步状态机实现，所述异步状态机基于所接收的信号改变其状态。 装置（10）改变它们的状态而没有同步时钟信号。

公开(公告)号：US06590939B1

公开(公告)日：2003-07-08

申请号：US09367399

申请日：1999-08-13

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L512

CPC classification number: H04L25/067 ,  H03M13/39

Abstract: The invention relates to a reception method and a receiver. Mechanisms are used for generating, at each level, numbers relating to a bit 1 and a bit 2 and representing a probability of a transition metric of survivor paths. Mechanisms are used for separately summing the numbers relating to the bit 1 and the bit 0 of more than one state and representing the probability of the transition metric. Mechanisms are used for generating logarithms of the sums and means for generating a difference of the logic numbers relating to the bit 1 and the bit 0 representing the probability of the transition metric, whereby a received bit can be determined without a correct path tracing phase.

Abstract translation: 本发明涉及一种接收方法和接收机。 机制用于在每个级别生成与位1和位2有关的数字，并且表示幸存路径的转换度​​量的概率。 机制用于对与多于一个状态的位1和位0相关的数字进行单独求和，并表示转换度量的概率。 机制用于产生和的对数和用于产生与位1相关的逻辑数字和表示转换度量的概率的位0的差异的装置，由此可以在没有正确的路径跟踪阶段的情况下确定接收的位。

公开(公告)号：US06396878B1

公开(公告)日：2002-05-28

申请号：US09171881

申请日：1998-10-28

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L512

CPC classification number: H03M13/39

Abstract: The present invention relates to reception method and apparatus. The invention is characterized in that received symbols are function of bits which are determined by means of temporally successive trellis levels, which comprises a predetermined number of states, with a transition from each of the states to a state at the next level being performed on the basis of a received signal.

Abstract translation: 本发明涉及接收方法和装置。 本发明的特征在于，接收的符号是通过时间上相继的网格级别确定的比特的功能，其包括预定数量的状态，从每个状态到下一级的状态的转换在 接收信号的基础。