公开(公告)号：US07031419B2

公开(公告)日：2006-04-18

申请号：US09893735

申请日：2001-06-29

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L7/00

CPC classification number: H04L1/0668 ,  H04L1/1607 ,  H04L1/1819 ,  H04L1/1845

Abstract: The invention relates to a data transmission system between two transceivers, including: dividing the symbols to be transmitted into blocks, the number of which is divisible by the number of transmitting antennas; transmitting one block using each antenna; receiving the blocks using one or more antennas; checking whether the blocks were received successfully; and, if the reception of the blocks failed, storing the received blocks in memory; retransmitting the same blocks in a predetermined format; receiving the retransmitted blocks and combining them with the blocks in memory, the predetermined format being selected in the method so that the blocks transmitted first and the retransmitted blocks form space-time block coding.

Abstract translation: 本发明涉及两个收发机之间的数据传输系统，包括：将要发送的符号划分成块，其数量可以被发送天线的数量除尽; 使用每个天线发射一个块; 使用一个或多个天线接收所述块; 检查块是否被成功接收; 并且如果块的接收失败，则将接收到的块存储在存储器中; 以预定格式重传相同的块; 接收重发块并将其与存储器中的块组合，在该方法中选择预定格式，使得首先发送的块和重发块形成空时块编码。

公开(公告)号：US07012973B1

公开(公告)日：2006-03-14

申请号：US09936540

申请日：1999-03-10

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L27/06

CPC classification number: H04L27/3809 ,  H04B7/01 ,  H04L25/0224 ,  H04L25/03019 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0095

Abstract: A system and method for estimating Doppler shift compensation in a mobile communication system is described. A channel impulse response determination circuit determines a channel impulse response for the channel on which the signal is received. A reference vector is generated using a set of known symbols and the channel impulse response, and an error vector is then generated by comparing the reference vector with received samples of the signal. In addition, the noise variance of the incoming signal can be determined. Then, a Doppler correction factor is estimated having a real part representing amplitude correction and an imaginary part representing phase correction.

Abstract translation: 描述了用于估计移动通信系统中的多普勒频移补偿的系统和方法。 信道脉冲响应确定电路确定接收信号的信道的信道脉冲响应。 使用一组已知符号和信道脉冲响应来生成参考矢量，然后通过将参考矢量与信号的接收采样进行比较来生成误差矢量。 此外，可以确定输入信号的噪声方差。 然后，估计具有表示幅度校正的实部和表示相位校正的虚部的多普勒校正因子。

公开(公告)号：US20050181797A1

公开(公告)日：2005-08-18

申请号：US10819346

申请日：2004-04-07

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L12/56 ,  H04W16/02 ,  H04W16/12 ,  H04W16/14 ,  H04W72/04 ,  H04W84/04 ,  H04Q7/00

CPC classification number: H04W16/12 ,  H04W16/02 ,  H04W16/14 ,  H04W28/16 ,  H04W36/18 ,  H04W84/042

Abstract: A method, a computer program and a system for allocating radio resources are provided for a TDMA cellular telecommunications system which applies spatial diversity and cell-specific radio frequency bands. The system for allocating the radio resources includes a frequency allocating network element for allocating radio frequency bands to at least two radio cells located within a reuse distance from each other, at least one overlap region being formed between the radio frequency bands, the at least one overlap region being reserved for a simultaneous use in the same transmission direction of the at least two radio cells. The invention provides a frequency reuse capability for radio cells located within a reuse distance from each other.

Abstract translation: 为应用空间分集和小区专用无线电频带的TDMA蜂窝电信系统提供了一种用于分配无线电资源的方法，计算机程序和系统。 用于分配无线电资源的系统包括频率分配网络单元，用于将频率分配给位于彼此的重用距离内的至少两个无线电小区，至少一个重叠区域形成在无线电频带之间，至少一个 重叠区域被保留用于在至少两个无线电小区的相同传输方向上同时使用。 本发明为位于彼此重用距离内的无线电小区提供频率重用能力。

公开(公告)号：US06748035B2

公开(公告)日：2004-06-08

申请号：US09230962

申请日：1999-02-04

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H03D100

CPC classification number: H04L1/20 ,  H04L1/0054

Abstract: The invention relates to a method for determining connection quality, and a receiver in a radio system, the receiver comprising means for decoding a received signal by the Viterbi method by means of a trellis diagram comprising a group of state points, and means for calculating state transition values for the two possible transitions in each point of the diagram. To determine advantageously the quality of the connection between a transmitter and the receiver, the inventive receiver comprises means for calculating, in each column of the trellis diagram, the maximum values for both the transitions of the points in the column, for determining the absolute value of the difference of the calculated maximum values, and means for estimating connection quality by utilizing said absolute value.

Abstract translation: 本发明涉及一种用于确定连接质量的方法，以及无线电系统中的接收机，该接收机包括用于通过维特比方法通过包括一组状态点的网格图对接收信号进行解码的装置，以及用于计算状态的装置 图中每个点的两个可能转换的转换值。 为了有利地确定发射机和接收机之间的连接的质量，本发明的接收机包括在格子图的每一列中计算列中的点的转换的最大值的装置，用于确定绝对值 计算出的最大值的差异，以及利用所述绝对值估计连接质量的装置。

公开(公告)号：US06658067B1

公开(公告)日：2003-12-02

申请号：US09508268

申请日：2000-03-09

Applicant: Olli Piirainen ,  Kari Niemela

Inventor： Olli Piirainen ,  Kari Niemela

IPC: H04L2720

CPC classification number: H04L27/0008 ,  H04L1/0003 ,  H04L1/0032

Abstract: The invention relates to a data transmission method and radio system. In particular, the invention relates to a method and system in which both the GMSK and the m-PSK modulation methods are available for the signal to be transmitted an in which the modulation method used at a given time can be changed to another modulation method. In the solution of the invention, the m-PSK modulator of the transmitter includes a multiplier adapted to multiply the signal to be transmitted by a given coefficient making the signal constellations of the received signal similar regardless of the modulation method. Thus, the processing of the signal in the receiver becomes easier and the quality of the transmission improves in connection with m-PSK modulation.

Abstract translation: 本发明涉及一种数据传输方法和无线电系统。 具体地，本发明涉及一种方法和系统，其中GMSK和m-PSK调制方法均可用于待发送的信号，其中在给定时间使用的调制方法可以改变为另一调制方法。 在本发明的解决方案中，发射机的m-PSK调制器包括一个乘法器，适用于将待传输的信号乘以给定的系数，使接收信号的信号星座相似，而不管调制方式如何。 因此，接收机中的信号的处理变得更容易，并且与m-PSK调制相关的传输质量得到改善。

公开(公告)号：US06614860B1

公开(公告)日：2003-09-02

申请号：US09355604

申请日：1999-07-30

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04L2706

CPC classification number: H04B7/01 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0095

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 by using estimated bit decisions for received bits which are sufficiently close to a zero phase offset point so as not to have been corrupted by the Doppler effect. The Doppler shift measured using these estimated bits can then be applied to bits of the signal which are further away from the zero phase offset point.

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。 描述了一种技术，用于通过对足够靠近零相位偏移点的接收比特使用估计比特决定来补偿该多普勒效应，以便不被多普勒效应破坏。 然后可以将使用这些估计位测量的多普勒频移应用于远离零相位偏移点的信号位。

公开(公告)号：US06532257B1

公开(公告)日：2003-03-11

申请号：US09269978

申请日：1999-04-28

Applicant: Olli Piirainen

Inventor： Olli Piirainen

IPC: H04B1700

CPC classification number: H03L7/089 ,  H03D13/004 ,  H03L7/0891

Abstract: In a method for performing a phase comparison, and a phase comparator, two binary signals are compared using two functionally similar asynchronous state machines, which generate two output signals used for controlling a phase. A first state machine is fed a first signal to be compared, an output signal of a second state machine and a handshaking signal of the second state machine. The second state machine is fed a second signal to be compared, an output signal of the first state machine and a handshaking signal of the first state machine. The two state machines activate their respective handshaking signals after detecting activation of the signal to be compared. The handshaking signal ensures the logical operation of the phase comparator.

Abstract translation: 在用于执行相位比较的方法和相位比较器中，使用两个功能相似的异步状态机来比较两个二进制信号，该异步状态机产生用于控制相位的两个输出信号。 第一状态机被馈送待比较的第一信号，第二状态机的输出信号和第二状态机的握手信号。 第二状态机被馈送待比较的第二信号，第一状态机的输出信号和第一状态机的握手信号。 在检测要比较的信号的激活之后，两个状态机激活它们各自的握手信号。 握手信号确保相位比较器的逻辑运行。

公开(公告)号：US6144709A

公开(公告)日：2000-11-07

申请号：US91978

申请日：1998-06-26

Applicant: Olli Piirainen ,  Kari Jyrkka

Inventor： Olli Piirainen ,  Kari Jyrkka

IPC: H04J3/00 ,  H04B7/212 ,  H04L7/02 ,  H04L7/033 ,  H04L7/04 ,  H04L7/10 ,  H03D1/00 ,  H04L27/06

CPC classification number: H04L7/0054 ,  H04L7/041 ,  H04L7/0337 ,  H04L7/10

Abstract: A method of detecting a call set-up burst, and a receiver, in a digital radio system, the receiver comprising a converter (304) for sampling a signal received in a given time slot, means (400) for correlating digitalized samples with a known training sequence, and means (402) for computing the energy of the correlation results obtained, means (404) for looking for the maximum values of a string of samples of a given order from the computed energies, and means (408) for averaging the maximum values found per one sample. To improve reliability of detecting a call set-up burst, the receiver comprises means (410) for averaging the energy of the other samples of the time slot per one sample, and means (412) for comparing the averaged maximum energy values with the energy values of the other samples.

Abstract translation: PCT No.PCT / FI96 / 00697 Sec。 371日期：1998年6月26日 102（e）日期1998年6月26日PCT 1996年12月23日PCT公布。 第WO97 / 24819号公报 日期1997年7月10日在数字无线电系统中检测呼叫建立突发的方法和接收机，所述接收机包括用于对给定时隙中接收的信号进行采样的转换器（304），用于 将数字化采样与已知训练序列相关联，以及用于计算获得的相关结果的能量的装置（402），用于从所计算的能量中寻找给定次序的一串样本的最大值的装置（404） （408），用于对每个样本找到的最大值求平均值。 为了提高检测呼叫建立突发的可靠性，接收机包括用于对每个样本的时隙的其他样本的能量进行平均的装置（410），以及用于将平均的最大能量值与能量进行比较的装置（412） 其他样品的值。