公开(公告)号：US06501789B2

公开(公告)日：2002-12-31

申请号：US09792820

申请日：2001-02-23

申请人： Tetsuya Yano ,  Kazuhisa Obuchi

发明人： Tetsuya Yano ,  Kazuhisa Obuchi

IPC分类号： H04L102

CPC分类号： H04B1/707 ,  H04L1/20

摘要： Disclosed herein is a receiving apparatus in a CDMA communication system for transmitting a transmit data subjected to a spread modulation processing with a predetermined spreading factor, and demodulating the transmit data by subjecting received signals to a despread processing. A first despread signal generator multiplies a received signal by the same code as a spreading code on the transmission side for each chip, divides the results of multiplications for all the chips into a plurality of groups, and sums the results of multiplications in each group so as to output respectively a despread signal having a spreading factor which is smaller than the spreading factor on the transmission side. A second despread signal generator sums respective k pair of the despread signals which are output from the first despread signal generator so as to generate a plurality of despread signals having a predetermined spreading factor. A bit error rate estimator judges whether the transmit data is “0” or “1” from each of the plurality of despread signals in a predetermined spreading factor, and estimates a bit error rate BER in the predetermined spreading factor by using the results of judgments.

摘要翻译： 这里公开了一种CDMA通信系统中的接收装置，用于以预定的扩频因子发送经过扩展调制处理的发送数据，并且通过对接收到的信号进行解扩处理来解调发送数据。 第一解扩信号发生器将接收到的信号与每个芯片的发送侧的扩展码相乘的代码相乘，将所有码片的乘法结果除以多个组，并将每组中的乘法结果相加 分别输出在发送侧具有小于扩频因子的扩展因子的去扩展信号。 第二解扩信号发生器对从第一解扩信号发生器输出的各k个解扩信号进行求和，以产生具有预定扩频因子的多个解扩信号。 误码率估计器以预定的扩频因子判断发送数据是否为多个解扩信号中的每一个发送数据是“0”还是“1”，并且通过使用判断结果来估计预定扩频因子中的误码率BER 。

公开(公告)号：US06320852B1

公开(公告)日：2001-11-20

申请号：US09033175

申请日：1998-03-02

申请人： Kazuhisa Obuchi ,  Takaharu Nakamura ,  Kazuo Kawabata ,  Hiroaki Iwamoto ,  Yoshiharu Tajima ,  Kenji Suda ,  Tetsuya Yano

发明人： Kazuhisa Obuchi ,  Takaharu Nakamura ,  Kazuo Kawabata ,  Hiroaki Iwamoto ,  Yoshiharu Tajima ,  Kenji Suda ,  Tetsuya Yano

IPC分类号： G08C1500

CPC分类号： H04L1/0059 ,  H04L1/0047 ,  H04L1/0061 ,  H04L1/06

摘要： A technique used in a mobile communications system. A mobile terminal station transmits a signal subjected to an error-correction encoding processing. Each of a plurality of base stations receives the signal transmitted from the mobile terminal station via the wireless line, performs an error-correction decoding processing for the received signal, and transmits an error-correction decoded signal to a base-station host apparatus via the wired line. The base-station host apparatus performs an error-correction encoding processing for each of the signals received from the base stations, composes the thus error-correction encoded signals into one signal, and performs an error-correction decoding processing for the composed signal. The technique can improve the error rate of a received signal without increasing the amount of signal data flowing between the base stations and the base-station host apparatus.

摘要翻译： 用于移动通信系统的技术。 移动终端发送经过纠错编码处理的信号。 多个基站中的每一个基站经由无线线路接收从移动终端发送的信号，对接收到的信号进行纠错解码处理，并通过该基站主机装置向纠错解码信号发送纠错解码信号 有线线。 基站主机装置对从基站接收的每个信号执行纠错编码处理，将由此纠错编码的信号组成一个信号，并对合成信号进行纠错解码处理。 该技术可以提高接收信号的错误率，而不会增加在基站和基站主机设备之间流动的信号数据量。

公开(公告)号：US08270525B2

公开(公告)日：2012-09-18

申请号：US12145834

申请日：2008-06-25

申请人： Takao Nakagawa ,  Tetsuya Yano ,  Kazuhisa Obuchi

发明人： Takao Nakagawa ,  Tetsuya Yano ,  Kazuhisa Obuchi

IPC分类号： H04L25/34

CPC分类号： H04L27/34 ,  H03M13/256 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/2966 ,  H03M13/356 ,  H04L1/0041 ,  H04L1/006 ,  H04L1/0064 ,  H04L2001/0098

摘要： A transmitter for use in digital radio communications systems includes: a bit corrector controls bit arrangement in such a manner that a code having high significance, out of multiple codes obtained by coding, is allocated with high priority to a bit having a tendency that the likelihood enlarges at the time of symbol decision on a receiver; a multi-level modulator allocates the code to the multiple bits in accordance with a predetermined symbol arrangement; and a symbol arrangement controller controls the symbol arrangement from equal distance arrangement to another arrangement in accordance with a ratio of the codes different in significance. To control symbol arrangement increases the effect of bit correction and improves an error rate on the receiver.

摘要翻译： 用于数字无线电通信系统的发射机包括：比特校正器以这样的方式控制比特排列，使得通过编码获得的多个码中具有高重要性的代码被高度优先地分配给具有趋势的比特 在接收者的符号决定时放大; 多级调制器根据预定的符号排列将码分配给多个比特; 并且符号排列控制器根据重要性不同的代码的比例，将符号排列从相等的距离布置控制到另一个排列。 为了控制符号排列，增加了位校正的效果，提高了接收机的误码率。

公开(公告)号：US07522561B2

公开(公告)日：2009-04-21

申请号：US10616067

申请日：2003-07-09

申请人： Tetsuya Yano ,  Kazuhisa Obuchi

发明人： Tetsuya Yano ,  Kazuhisa Obuchi

IPC分类号： H04B7/00 ,  H04W4/00

CPC分类号： H04W52/12 ,  H04W52/143 ,  H04W52/20 ,  H04W52/241 ,  H04W52/362

摘要： The reference SIR control command determination unit of a reference SIR control unit provides a DSP with a target BLER and obtains an observation time period Sinc and Sdec from a conversion table in which an observation time period T, a reference SIR increase step Sinc, and a reference SIR decrease step Sdec are set in advance in such a way to satisfy a theoretical equation, including the BLER. A register stores these pieces of data. A reference SIR increase/decrease control unit compares a result obtained by increasing/decreasing a reference SIR using Sinc or Sdec with an SIR measurement value, based on a data error state detected by a CRC detection unit and generates a transmission power control command.

摘要翻译： 参考SIR控制单元的参考SIR控制命令确定单元向DSP提供目标BLER，并且从观测时间段T，参考SIR增加步骤Sinc和 参考SIR降低步骤Sdec被预先设置为满足包括BLER的理论方程式的方式。 一个寄存器存储这些数据。 参考SIR增减控制单元根据由CRC检测单元检测到的数据错误状态，将使用Sinc或Sdec的参考SIR与SIR测量值进行比较而得到的结果进行比较，并生成发送功率控制命令。

公开(公告)号：US07392451B2

公开(公告)日：2008-06-24

申请号：US10856212

申请日：2004-05-28

申请人： Kazuhisa Obuchi ,  Tetsuya Yano

发明人： Kazuhisa Obuchi ,  Tetsuya Yano

IPC分类号： G08C25/02 ,  H04L1/18 ,  H04L1/14

CPC分类号： H04L1/1867 ,  H04L1/1803 ,  H04L2001/0092 ,  H04L2001/125 ,  H04W88/08 ,  H04W88/12

摘要： A packet data retransmission control method, where a base-station upper-level control system transmits downstream packet data, which is terminated at a terminal station, to a plurality of base stations. A specific base station that is one of the base stations transfers the downstream packet data to the terminal station. The plurality of base stations receive an upstream control signal with which reception of the downstream packet data is acknowledged and which is returned from the terminal station. Base stations other than the specific base station notify the specific base station via the base-station upper-level control system that they have received the upstream control signal. The specific base station determines packet data to be retransmitted according to the receiving situation thereof for the upstream control signal returned from the terminal station and the receiving situations of the other base stations for the upstream control signal.

摘要翻译： 一种分组数据重传控制方法，其中基站上层控制系统将终端的终端的下行分组数据发送到多个基站。 作为基站之一的特定基站将下行分组数据传送到终端站。 多个基站接收上游控制信号，通过该上行控制信号确认下游分组数据的接收，并从终端站返回。 除特定基站以外的基站经由基站上层控制系统通知特定的基站已经接收到上游控制信号。 特定基站根据其从终端返回的上行控制信号的接收状况和其他基站对于上游控制信号的接收状况来确定要重传的分组数据。

公开(公告)号：US07096402B2

公开(公告)日：2006-08-22

申请号：US09901295

申请日：2001-07-09

申请人： Tetsuya Yano ,  Kazuhisa Obuchi ,  Kazuo Kawabata

发明人： Tetsuya Yano ,  Kazuhisa Obuchi ,  Kazuo Kawabata

IPC分类号： H03M13/29 ,  H03M13/45

CPC分类号： H04L1/0051 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/2975 ,  H03M13/2978 ,  H03M13/2984 ,  H04L1/0055

摘要： Detection of errors in the results of turbo decoding is performed while decoding is being repeated. If absence of errors is detected, the results of decoding are output, even though repetition of the decoding operation is in progress, and further decoding is discontinued. Further, the number of times errors are detected in decoded results when decoding has been performed a set number of times is monitored and the decoding operation is executed again if the number of times errors are detected is equal to or less than a set value. Further, one of first and second decoded results output from first and second elementary decoders that construct a turbo decoder is selected as appropriate and is then output.

摘要翻译： 在重复解码时执行turbo解码结果中的错误的检测。 如果检测到不存在错误，即使解码操作的重复正在进行，输出解码结果，并且中断进一步的解码。 此外，如果检测到错误的次数等于或小于设定值，则在解码已经执行设定次数时，在解码结果中检测到错误的次数被监视，并且如果检测到错误的次数再次执行解码操作。 此外，适当地选择构成turbo解码器的第一和第二基本解码器输出的第一和第二解码结果之一，然后输出。

公开(公告)号：US07024602B2

公开(公告)日：2006-04-04

申请号：US10286088

申请日：2002-10-30

申请人： Kazuhisa Obuchi ,  Tetsuya Yano ,  Makoto Uchishima

发明人： Kazuhisa Obuchi ,  Tetsuya Yano ,  Makoto Uchishima

IPC分类号： G01R31/28

CPC分类号： H04L1/0061 ,  H03M13/091 ,  H03M13/2707 ,  H03M13/29 ,  H03M13/41 ,  H03M13/6502 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/0071

摘要： A communication system transmits frames with an arbitrary information length among a plurality of possible information lengths. On receipt of a frame, a receiver performs Viterbi decoding and a CRC operation assuming that the information length of the relavent frame is the same as that of an immediately previous frame. The information length of the frame is detected based on the result of the CRC operation.

公开(公告)号：US20050097432A1

公开(公告)日：2005-05-05

申请号：US10970859

申请日：2004-10-20

申请人： Kazuhisa Obuchi ,  Tetsuya Yano ,  Takaharu Nakamura

发明人： Kazuhisa Obuchi ,  Tetsuya Yano ,  Takaharu Nakamura

IPC分类号： G06F11/00 ,  H03M13/00 ,  H03M13/09 ,  H04L1/00

CPC分类号： H03M13/091 ,  H03M13/093 ,  H04L1/0043 ,  H04L1/0061 ,  H04L1/1829

摘要： Disclosed are an error-detecting encoding apparatus for creating parity bits by error-detecting encoding processing, appending the parity bits to an input data string and encoding the data string, and an error-detecting decoding apparatus for detecting error using these parity bits. Data segmenting means segments an input data string, which is to undergo error-detecting encoding, into a plurality of sub-data strings, dividing means divides the segmented sub-data strings by a polynomial, which is for generating an error-detecting code, and calculates remainders, converting means applies conversion processing, which conforms to a segmentation position of the sub-data strings, to the remainders on a per-remainder basis, and combining means combines converted values, which have been obtained by the conversion processing, and outputs parity bits. An encoder appends this parity to a data string, and a decoder detects error using this parity.

摘要翻译： 公开了一种错误检测编码装置，用于通过错误检测编码处理产生奇偶校验位，将奇偶校验位附加到输入数据串并对数据串进行编码;以及错误检测解码装置，用于使用这些奇偶校验位检测误差。 数据分段装置将进行错误检测编码的输入数据串分割成多个子数据串，分割装置将分割的子数据串除以用于生成错误检测码的多项式， 并且计算余数，转换装置将符合子数据串的分割位置的转换处理应用于基于每个余数的余数，并且组合装置将已经通过转换处理获得的转换值和 输出奇偶校验位。 编码器将该奇偶校验附加到数据串，并且解码器使用该奇偶校验来检测错误。

公开(公告)号：US20050085256A1

公开(公告)日：2005-04-21

申请号：US10956535

申请日：2004-09-30

申请人： Tetsuya Yano ,  Kazuhisa Obuchi

发明人： Tetsuya Yano ,  Kazuhisa Obuchi

IPC分类号： H04B7/005 ,  H04W52/12 ,  H04W52/24 ,  H04B7/00

CPC分类号： H04W52/248 ,  H04W52/12 ,  H04W52/241

摘要： An outer-loop power control method and a communication apparatus having an outer-loop power control function for increasing target SIR if an error is detected in a block-error observation interval and decreasing target SIR if not a single error is detected in the block-error observation interval. At least one of the block-error observation interval, an incrementing step for when target SIR is increased and a decrementing step for when target SIR is decreased is varied based upon the number of erroneous blocks among error-detecting blocks contained in a transmission time interval TTI.

摘要翻译： 如果在块错误观察间隔中检测到错误并且如果不是单个错误则降低目标SIR，则外部功率控制方法和通信装置具有用于增加目标SIR的外部环路功率控制功能， 误差观察间隔。 块误差观察间隔中的至少一个，用于当目标SIR增加时的递增步骤和用于当目标SIR减小时的递减步骤中的至少一个基于包含在传输时间间隔中的错误检测块中的错误块的数量而变化 TTI。

公开(公告)号：US06526539B1

公开(公告)日：2003-02-25

申请号：US09574042

申请日：2000-05-18

申请人： Tetsuya Yano ,  Kazuhisa Obuchi ,  Kazuo Kawabata

发明人： Tetsuya Yano ,  Kazuhisa Obuchi ,  Kazuo Kawabata

IPC分类号： H03M1303

CPC分类号： H03M13/2984 ,  H03M13/2792 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/658 ,  H03M13/6583

摘要： A turbo decoder is provided in which a distribution of likelihood values that are obtained during the course of turbo-decoding is watched and scaling of an operation object to be subjected to subsequent likelihood computation of the turbo-decoding is performed in accordance with the distribution. This turbo decoder can reduce the cost, size, and power consumption of a transmission system and equipment, increase their reliability, and improve the transmission quality and performance.

摘要翻译： 提供了一种turbo解码器，其中观察在turbo解码过程中获得的似然值分布，并根据该分布来执行要进行turbo解码的后续似然计算的操作对象的缩放。 该turbo解码器可以降低传输系统和设备的成本，尺寸和功耗，提高其可靠性，提高传输质​​量和性能。