公开(公告)号：US20080240311A1

公开(公告)日：2008-10-02

申请号：US11806836

申请日：2007-06-04

Applicant: Olli Piirainen ,  Markku Vainikka ,  Juha P. Karjalainen

Inventor： Olli Piirainen ,  Markku Vainikka ,  Juha P. Karjalainen

IPC: H04L27/06

CPC classification number: H04L27/2657 ,  H04L27/2636 ,  H04L27/2675 ,  H04L27/2684 ,  H04L2027/003 ,  H04L2027/0038

Abstract: A frequency error correction scheme applicable in a receiver of a mobile telecommunication system is presented. The present frequency error correction scheme is carried out in a time domain after an equalization process. The present frequency error correction scheme may be applied to a base station receiving signals transmitted according to a single-carrier frequency division multiple access communication scheme. The separation of different received signals for further processing is carried out in the frequency domain before the equalization and the frequency error correction.

Abstract translation: 提出了适用于移动电信系统接收机的频率纠错方案。 本频率纠错方案在均衡处理之后的时域中进行。 本频率纠错方案可以应用于接收根据单载波频分多址通信方案发送的信号的基站。 用于进一步处理的不同接收信号的分离在均衡和频率误差校正之前的频域中进行。

公开(公告)号：US20070173271A1

公开(公告)日：2007-07-26

申请号：US11642551

申请日：2006-12-21

Applicant: Jari Hulkkonen ,  Olli Piirainen

Inventor： Jari Hulkkonen ,  Olli Piirainen

IPC: H04Q7/20

CPC classification number: H04W72/082 ,  H04B1/1027 ,  H04L27/2601 ,  H04L27/3488

Abstract: A network element, a terminal and a method of allocating a radio channel to a connection between a terminal and a base station in a telecommunication system are provided. The number and properties of potential interferers in a plurality of available radio channels are determined, and channel allocation is performed on the basis of the determination.

Abstract translation: 提供了一种网络元件，终端以及在电信系统中为终端和基站之间的连接分配无线电信道的方法。 确定多个可用无线电信道中的潜在干扰源的数量和性质，并且基于该确定来执行信道分配。

公开(公告)号：US06724841B2

公开(公告)日：2004-04-20

申请号：US09934034

申请日：2001-08-21

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03D104

CPC classification number: H04L25/03057 ,  H04L2025/03407 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03617

Abstract: The present invention proposes a method for processing signals in order to remove waveform distortion by using an equalizer, said method comprising the steps of receiving an incoming signal, preprocessing said incoming signal, estimating a channel impulse response from said received signal estimating a noise energy from said received signal, calculating filter taps by using said estimated channel impulse response and said noise energy, filtering said received signal by using said calculated filter taps by a feedforward filter means, and supplying said received signal to an equalizer means which comprises a feedback filter, to obtain a resulting signal by a decision in said equalizer means, wherein said estimated channel impulse response is partitioned into at least two parts, in said calculating step of the filter taps one of said parts of said channel impulse response being used for calculating filter taps in said calculating step of the filter taps by using a weight function.

Abstract translation: 本发明提出了一种用于处理信号以便通过使用均衡器来消除波形失真的方法，所述方法包括以下步骤：接收输入信号，预处理所述输入信号，从所述接收信号估计信道脉冲响应，估计噪声能量 所述接收信号，通过使用所述估计的信道脉冲响应和所述噪声能量来计算滤波器抽头，通过使用所述计算的滤波器抽头由前馈滤波器装置对所述接收信号进行滤波，并将所述接收信号提供给包括反馈滤波器的均衡器装置， 通过所述均衡器装置中的决定来获得结果信号，其中所述估计信道脉冲响应被划分为至少两部分，在所述滤波器的计算步骤中，所述信道脉冲响应的所述部分之一用于计算滤波器抽头 在通过使用加权函数的滤波器抽头的所述计算步骤中。

公开(公告)号：US06721374B2

公开(公告)日：2004-04-13

申请号：US10066803

申请日：2002-02-06

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03D104

CPC classification number: H04B1/123 ,  H04L1/06 ,  H04L25/03057 ,  H04L25/03993 ,  H04L2025/0349 ,  H04L2025/03605

Abstract: The invention relates to a method for reducing the effects of noise and to a receiver comprising at least one sampling means (12) for forming sample signals from a received signal. The receiver also comprises a whitening means (30) for converting the noise in the sample signals to white noise and digital filters (41, 42, 43, 44) for filtering the sample signals comprising white noise. The receiver further comprises a computation means (80) for computing filter tap coefficients from a sample signal. Further still, the receiver comprises summers (51, 52), each one of which is arranged to receive a filtered signal from at least one filter and to sum the signals received from the filters to produce first summed signals. The receiver also comprises a detector (60) for summing the first summed signals to produce the actual summed signal and for detecting the actual summed signal.

Abstract translation: 本发明涉及一种降低噪声影响的方法和一种接收机，包括至少一个用于从接收信号形成采样信号的采样装置（12）。 接收机还包括用于将采样信号中的噪声转换为白噪声的白化装置（30）和用于对包括白噪声的采样信号进行滤波的数字滤波器（41,42,43,44）。 接收机还包括用于从采样信号计算滤波器抽头系数的计算装置（80）。 此外，接收机还包括加法器（51,52），其中每一个被布置成从至少一个滤波器接收经过滤波的信号，并且对从滤波器接收的信号求和以产生第一相加信号。 接收机还包括用于对第一相加信号求和以产生实际求和信号并用于检测实际求和信号的检测器（60）。

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：US07885318B2

公开(公告)日：2011-02-08

申请号：US11897962

申请日：2007-08-31

Applicant: Mikko Saily ,  Olli Piirainen ,  Kari Niemela ,  Jari Hulkkonen

Inventor： Mikko Saily ,  Olli Piirainen ,  Kari Niemela ,  Jari Hulkkonen

IPC: H04B1/00

CPC classification number: H04B17/345

Abstract: A method, mobile device, network device, system, and software are devised for soft value scaling with a single antenna interference cancellation (SAIC) receiver, or with an interference rejection combining (IRC) receiver, in an unsynchronized network. A signal is received having interference that is caused by a non-synchronized network. A desired power level of that signal is calculated. Then the desired power is compared to a total power of the signal, in order to identify a portion of a received burst having substantial interference. Then that portion of the received burst is weighted, to reduce its importance during decoding.

Abstract translation: 设计了一种方法，移动设备，网络设备，系统和软件，用于在不同步网络中使用单天线干扰消除（SAIC）接收机或与干扰抑制组合（IRC）接收机进行软值缩放。 接收到具有由非同步网络引起的干扰的信号。 计算该信号的期望功率电平。 然后将期望的功率与信号的总功率进行比较，以便识别具有实质干扰的接收脉冲串的一部分。 然后对接收到的突发的那部分进行加权，以减少它在解码过程中的重要性。

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。