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：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：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：US07920635B2

公开(公告)日：2011-04-05

申请号：US11892963

申请日：2007-08-28

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L27/28

CPC classification number: H03F1/02 ,  H04L27/2623

Abstract: There is provided a method of clipping a transmission signal. The method comprises: providing a residual signal of a complex envelope clipper based on the transmission signal to be clipped; providing a reference signal respective to the residual signal, the reference signal corresponding to an ideal residual signal; forming a clipping signal on the basis of the residual signal and the reference signal; subtracting the clipping signal from the residual signal for removing higher amplitudes of the residual signal; and subtracting the clipping signal from the reference signal for providing a reference signal respective to the clipped residual signal.

Abstract translation: 提供了一种限制传输信号的方法。 该方法包括：基于待剪切的传输信号提供复信封限幅器的残留信号; 提供相应于残留信号的参考信号，所述参考信号对应于理想的残余信号; 基于残留信号和参考信号形成限幅信号; 从残差信号中减去削波信号，以去除残留信号的较高幅度; 以及从所述参考信号中减去所述限幅信号，以提供与所述限幅残差信号相对应的参考信号。

公开(公告)号：US07561648B2

公开(公告)日：2009-07-14

申请号：US10494207

申请日：2002-10-30

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04B1/10

CPC classification number: H04L27/2331 ,  H04L2027/0065

Abstract: There is disclosed a technique for generating an improved estimate of the frequency error in a received signal, and more particularly the application of such a technique in the equalization circuitry of a wireless network element.

Abstract translation: 公开了一种用于产生对接收信号中的频率误差的改进估计的技术，更具体地说，这种技术在无线网元的均衡电路中的应用。

公开(公告)号：US07561643B1

公开(公告)日：2009-07-14

申请号：US10111533

申请日：1999-10-27

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03D1/04 ,  H03D1/06

CPC classification number: H04L25/0212 ,  H04L25/0228 ,  H04L25/025 ,  H04L25/062

Abstract: A method of simultaneously determining a DC offset and a channel impulse response from a received signal in a mobile communication system. The received signal Y comprising a set of training sequence bits that have been modulated prior to transmission. The modulated signals experience a certain phase shift and are rotated by a certain angle. The received signal may also comprise a DC offset component ADC that needs to be removed. By manipulation of the received signal samples with the knowledge of the original training sequence TRS and method of modulation used, it is possible to simultaneously estimate the communication channel's impulse response H and the DC offset ADC by finding the Least Square solution to a linear equation, such that the energy of the noise term introduced into the communication channel may be kept to a minimum.

Abstract translation: 一种在移动通信系统中同时确定来自接收信号的DC偏移和信道脉冲响应的方法。 接收信号Y包括在发送之前被调制的一组训练序列比特。 调制信号经历一定的相移并旋转一定角度。 所接收的信号还可以包括需要去除的DC偏移分量ADC。 通过利用原始训练序列TRS和所使用的调制方法的知识来操纵接收到的信号样本，可以通过找到线性方程的最小二乘解来同时估计通信信道的脉冲响应H和DC偏移ADC， 使得引入通信信道的噪声项的能量可以保持最小。

公开(公告)号：US07542734B2

公开(公告)日：2009-06-02

申请号：US11247324

申请日：2005-10-12

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03C7/02 ,  H04B1/02 ,  H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0697 ,  H04B7/063

Abstract: The invention provides a data transmission solution in a telecommunication system. According to the invention, a data transmission scheme is selected for a first transceiver unit, which comprises a plurality of transmit antennas, on the basis of the quality of a communication link and transmit antenna correlation information associated with the first transceiver unit, from a list including at least the following data transmission schemes: transmitting different data from each antenna of the first transceiver unit, the data transmitted from one antenna being independent of the data transmitted from another antenna; and transmitting the same data from each antenna of the first transceiver unit and controlling the direction of the transmitted data according to the properties of a radio channel. The selection of the data transmission scheme is carried out during an active communication link between the first and a second transceiver unit.

Abstract translation: 本发明提供一种电信系统中的数据传输解决方案。 根据本发明，从列表中选择基于通信链路的质量和与第一收发器单元相关联的发射天线相关信息的第一收发器单元的数据传输方案，其包括多个发射天线 至少包括以下数据传输方案：从第一收发器单元的每个天线发送不同数据，从一个天线发送的数据独立于从另一个天线发送的数据; 并且从第一收发器单元的每个天线发送相同的数据，并且根据无线电信道的属性来控制所发送的数据的方向。 在第一和第二收发器单元之间的主动通信链路期间执行数据传输方案的选择。

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：US06895044B2

公开(公告)日：2005-05-17

申请号：US10001156

申请日：2001-11-01

Applicant: Aki Happonen ,  Olli Piirainen

Inventor： Aki Happonen ,  Olli Piirainen

IPC: H04J3/00 ,  H04B7/005 ,  H04B17/318 ,  H04L1/20 ,  H03K5/59

CPC classification number: H04L1/20 ,  H04B17/318

Abstract: The present invention proposes a method for estimating a signal variance of a received signal (y) transmitted via a transmission channel, said method comprising the steps of: estimating the energy (RSSI) of the received signal (y), estimating the energy (Emax) of channel impulse response (h) taps, and estimating said signal variance (VAR) of said received signal by subtracting said estimated energy of channel impulse response taps (Emax) from said estimated energy (RSSI) of said received signal, such that said signal variance is obtained as VAR=RSSI−Emax. The present invention also proposes a correspondingly adapted device.

Abstract translation: 本发明提出了一种用于估计经由传输信道发送的接收信号（y）的信号方差的方法，所述方法包括以下步骤：估计接收信号（y）的能量（RSSI），估计能量（Emax ），并且通过从所述接收信号的所述估计能量（RSSI）中减去所述信道脉冲响应抽头（Emax）的所述估计能量来估计所述接收信号的所述信号方差（VAR），使得所述信号脉冲响应 获得信号方差为VAR = RSSI-Emax。 本发明还提出了一种相应适应的装置。