公开(公告)号：US20050094745A1

公开(公告)日：2005-05-05

申请号：US10974723

申请日：2004-10-28

申请人： Kenji Miyanaga ,  Tomohiro Kimura ,  Kenichi Mori ,  Hitoshi Takai

发明人： Kenji Miyanaga ,  Tomohiro Kimura ,  Kenichi Mori ,  Hitoshi Takai

IPC分类号： H04L27/02 ,  H03M5/12 ,  H04L25/49 ,  H04L27/06 ,  H03D1/24

CPC分类号： H04L27/06 ,  H04L25/4904

摘要： A delay section delays a detected signal by less than one bit time in NRZ data. A subtraction section performs subtraction between a delayed signal and the detected signal, and outputs a resultant signal. A clock extraction section extracts, from crossing points of a subtracted signal, crossing points whose time interval is more than or equal to Tb-α and less than or equal to Tb+β (0

摘要翻译： 延迟部分在NRZ数据中将检测信号延迟小于一个位时间。 减法部分在延迟信号和检测信号之间进行减法，并输出结果信号。 时钟提取部从减法信号的交叉点提取时间间隔大于等于Tb-α且小于等于Tb +β的交叉点（0 <α≤Tb/8,0≤β <= Tb：Tb是NRZ数据中的一位时间），并且输出与提取的交叉点同步的同步信号。 时钟恢复部将时钟信号与同步信号的相位同步，并输出数据时钟信号。 确定部分根据数据时钟信号确定从减法部分输出的减法信号的极性，并将确定结果作为NRZ数据输出。

公开(公告)号：US07450666B2

公开(公告)日：2008-11-11

申请号：US10974723

申请日：2004-10-28

申请人： Kenji Miyanaga ,  Tomohiro Kimura ,  Kenichi Mori ,  Hitoshi Takai

发明人： Kenji Miyanaga ,  Tomohiro Kimura ,  Kenichi Mori ,  Hitoshi Takai

IPC分类号： H04L27/22 ,  H04L7/04

CPC分类号： H04L27/06 ,  H04L25/4904

摘要： A delay section delays a detected signal by less than one bit time in the NRZ data. A subtraction section performs subtraction between a delayed signal and the detected signal, and outputs a resultant signal. A clock extraction section extracts, from crossing points of a subtracted signal, crossing points whose time interval is more than or equal to (Tb−α) and less than or equal to (Tb+β) (wherein 0

摘要翻译： 延迟部分在NRZ数据中将检测信号延迟小于一个位时间。 减法部分在延迟信号和检测信号之间进行减法，并输出结果信号。 时钟提取部从减法信号的交叉点提取时间间隔大于等于（Tb-α）且小于等于（Tb +β）的交叉点（其中0 <α= Tb / 8，0 <β= Tb：Tb是NRZ数据中的一位时间），并且输出与提取的交叉点同步的同步信号。 时钟恢复部将时钟信号与同步信号的相位同步，并输出数据时钟信号。 确定部分根据数据时钟信号确定从减法部分输出的相减信号的极性，并将确定结果作为NRZ数据输出。

公开(公告)号：US06922453B2

公开(公告)日：2005-07-26

申请号：US10140889

申请日：2002-05-09

申请人： Kenji Miyanaga ,  Hidetoshi Yamasaki ,  Yoshio Urabe ,  Hitoshi Takai ,  Kenichi Mori

发明人： Kenji Miyanaga ,  Hidetoshi Yamasaki ,  Yoshio Urabe ,  Hitoshi Takai ,  Kenichi Mori

IPC分类号： H04B7/08 ,  H04B7/10

CPC分类号： H04B7/0888

摘要： A diversity receiver carries out error detection, error correction, and data detection on each detected data string 21. An output switching unit 17 outputs a decoded data string 24 of a branch selected by a branch selector 16. The branch selector 16 selects a branch of highest priority in priority information 29 from branches of which a data detection signal 25 indicates that the data is valid and of which the number of error symbols 22 coincides with a minimum value. In the priority information 29, higher priority is assigned to a branch that includes an antenna of which the coverage is closer to that of an antenna included in a branch selected at the immediately-previous time. Thus, selected from the plurality of branches having the minimum number of error symbols 22 is the one that includes the antenna of which the coverage is closest to the coverage of the antenna included in the branch selected at the immediately-previous time. Therefore, it is possible to suppress the occurrence of misselection of a poor-quality branch, and improve a reception characteristic.

摘要翻译： 分集接收机对每个检测数据串21执行错误检测，纠错和数据检测。输出切换单元17输出由分支选择器16选择的分支的解码数据串24.分支选择器16选择分支 数据检测信号25指示数据有效并且误差符号22的数目与最小值一致的来自分支的优先级信息29的最高优先级。 在优先级信息29中，较高的优先级被分配给一个分支，该分支包括一个天线，该天线的覆盖范围更接近包括在紧接在前一时刻所选择的分支中的天线的天线。 因此，从具有最小数目的错误符号22的多个分支中选择的是包括其最接近天线的天线的天线，天线包括在紧邻之前的时间中选择的分支中。 因此，可以抑制质量差的分支的错误选择的发生，并且提高接收特性。

公开(公告)号：US07724856B2

公开(公告)日：2010-05-25

申请号：US10591152

申请日：2005-03-18

申请人： Hideki Nakahara ,  Tomohiro Kimura ,  Hitoshi Takai ,  Kenichi Mori

发明人： Hideki Nakahara ,  Tomohiro Kimura ,  Hitoshi Takai ,  Kenichi Mori

IPC分类号： H04L7/00

CPC分类号： H04L7/0083 ,  H04L7/033

摘要： A clock recovery circuit capable of fast and accurate clock phase locking even in the presence of frequency shift and noise. The input signal includes, in order, a preamble with an alternating bit sequence pattern, a unique word and data. A detection unit detects zero crossings and measures the time interval therebetween. A 1-interval judgment unit judges whether an interval signal is within a predetermined range, and a 2-interval judgment unit sums two adjacent interval signals and judges whether the 2-interval signal is within a predetermined range. A control unit controls a zero-crossing signal based on the judgment result and outputs a valid zero-crossing signal if judged in the affirmative. A switching unit switches between outputting the zero-crossing signal and the valid zero-crossing signal as valid phase error information based on a frame reception signal input from a frame detection unit. A clock generation unit uses the valid phase error information in generating a symbol clock.

摘要翻译： 即使存在频移和噪声，时钟恢复电路也能够快速准确地进行时钟相位锁定。 输入信号按顺序包括具有交替位序列模式的前导码，唯一字和数据。 检测单元检测过零点并测量它们之间的时间间隔。 1间隔判断单元判断间隔信号是否在预定范围内，并且2间隔判断单元对两个相邻间隔信号求和，并判断2间隔信号是否在预定范围内。 控制单元根据判断结果控制过零信号，如果判断为肯定，则输出有效的过零信号。 切换单元基于从帧检测单元输入的帧接收信号，在输出过零信号和有效过零信号之间切换为有效的相位误差信息。 时钟生成单元在生成符号时钟时使用有效的相位误差信息。

公开(公告)号：US20070297549A1

公开(公告)日：2007-12-27

申请号：US10591152

申请日：2005-03-18

申请人： Hideki Nakahara ,  Tomohiro Kimura ,  Hitoshi Takai ,  Kenichi Mori

发明人： Hideki Nakahara ,  Tomohiro Kimura ,  Hitoshi Takai ,  Kenichi Mori

IPC分类号： H04L7/00

CPC分类号： H04L7/0083 ,  H04L7/033

摘要： A clock recovery circuit capable of fast and accurate clock phase locking even in the presence of frequency shift and noise. The input signal includes, in order, a preamble with an alternating bit sequence pattern, a unique word and data. A detection unit detects zero crossings and measures the time interval therebetween. A 1-interval judgment unit judges whether an interval signal is within a predetermined range, and a 2-interval judgment unit sums two adjacent interval signals and judges whether the 2-interval signal is within a predetermined range. A control unit controls a zero-crossing signal based on the judgment result and outputs a valid zero-crossing signal if judged in the affirmative. A switching unit switches between outputting the zero-crossing signal and the valid zero-crossing signal as valid phase error information based on a frame reception signal input from a frame detection unit. A clock generation unit uses the valid phase error information in generating a symbol clock.

摘要翻译： 即使存在频移和噪声，时钟恢复电路也能够快速准确地进行时钟相位锁定。 输入信号按顺序包括具有交替位序列模式的前导码，唯一字和数据。 检测单元检测过零点并测量它们之间的时间间隔。 1间隔判断单元判断间隔信号是否在预定范围内，并且2间隔判断单元对两个相邻间隔信号求和，并判断2间隔信号是否在预定范围内。 控制单元根据判断结果控制过零信号，如果判断为肯定，则输出有效的过零信号。 切换单元基于从帧检测单元输入的帧接收信号，在输出过零信号和有效过零信号之间切换为有效的相位误差信息。 时钟生成单元在生成符号时钟时使用有效的相位误差信息。

公开(公告)号：US20080175221A1

公开(公告)日：2008-07-24

申请号：US10569491

申请日：2005-09-16

申请人： Hideki Nakahara ,  Hitoshi Takai ,  Hidetoshi Yamasaki ,  Kenji Miyanaga ,  Koichiro Tanaka

发明人： Hideki Nakahara ,  Hitoshi Takai ,  Hidetoshi Yamasaki ,  Kenji Miyanaga ,  Koichiro Tanaka

IPC分类号： H04J3/06

CPC分类号： H04L1/1887 ,  H04B7/022 ,  H04B7/0667 ,  H04B7/0676 ,  H04B7/15592 ,  H04W84/042 ,  H04W84/047

摘要： The present invention provides a wireless transmission system in which it is possible to exert a maximum path diversity effect even if the maximum number of effective branches is limited to a small number. A transmission timing control section (23) determines a transmission start timing to be a timing obtained by delaying a reference timing by a predetermined delay amount. A modulation section (21) modulates a signal by a modulation scheme such that an anti-multipath property is exerted when the signal is demodulated on a receiver side, and transmits the modulated signal at the transmission start timing. In a receiving station (12), a demodulation section (33) demodulates the receive signal to obtain receive data. The predetermined delay amount is such that signals are received at the receiving station (12) at a plurality of signal-receiving timings, and the number of signal-receiving timings is less than or equal to a predetermined maximum number of effective branches, a difference between the signal-receiving timings is greater than or equal to a predetermined delay resolution and is less than or equal to a predetermined maximum delay.

摘要翻译： 本发明提供一种无线传输系统，其中即使最大数量的有效分支被限制为少数，也可以施加最大路径分集效应。 发送定时控制部（23）将发送开始定时确定为通过将基准定时延迟预定延迟量而获得的定时。 调制部（21）通过调制方式对信号进行调制，使得当在接收机侧解调信号时施加抗多径特性，并在发送开始定时发送调制信号。 在接收站（12）中，解调部（33）对接收信号进行解调，得到接收数据。 预定延迟量使得在接收站（12）处以多个信号接收定时接收信号，并且信号接收定时的数量小于或等于预定的最大有效分支数，差 在信号接收定时之间大于或等于预定的延迟分辨率并且小于或等于预定的最大延迟。

公开(公告)号：US08675759B2

公开(公告)日：2014-03-18

申请号：US12294568

申请日：2007-03-20

申请人： Hitoshi Takai ,  Hidetoshi Yamasaki ,  Hideki Nakahara ,  Kenji Miyanaga

发明人： Hitoshi Takai ,  Hidetoshi Yamasaki ,  Hideki Nakahara ,  Kenji Miyanaga

IPC分类号： H04B7/02

CPC分类号： H04B7/2662

摘要： A wireless transmission system performs multi-station simultaneous transmission of data. The wireless transmission system includes wireless stations for transmitting and receiving data. Transmitter-side wireless stations, a multipath channel, and receiver-side wireless stations constitute a system for path diversity. At least one wireless station among the wireless stations determines, depending on a response packet with respective to a multi-station simultaneous transmission request packet transmitted by itself or other stations, delay amounts from a reference timing during multi-station simultaneous transmission in the wireless transmission system, and symbol waveforms that are a basis for a modulated waveform. A difference between each delay amount is set to be larger than or equal to a predetermined delay resolution for each symbol waveform, and a difference between maximum and minimum values of the delay amounts is set to be smaller than or equal to a predetermined maximum delay.

摘要翻译： 无线传输系统执行多站同时传输数据。 无线传输系统包括用于发送和接收数据的无线站。 发射机侧无线站，多路径信道和接收机侧无线站构成路径分集的系统。 无线站中的至少一个无线站根据与其自身或其他站发送的多站同时发送请求分组相对应的响应分组来确定在无线发送中的多站同时发送期间的基准定时的延迟量 系统和符号波形，这是调制波形的基础。 每个延迟量之间的差设定为大于或等于每个符号波形的预定延迟分辨率，并且延迟量的最大值和最小值之间的差被设置为小于或等于预定最大延迟。

公开(公告)号：US07787417B2

公开(公告)日：2010-08-31

申请号：US11631291

申请日：2005-07-05

申请人： Hidetoshi Yamasaki ,  Kenji Miyanaga ,  Hitoshi Takai ,  Koichiro Tanaka

发明人： Hidetoshi Yamasaki ,  Kenji Miyanaga ,  Hitoshi Takai ,  Koichiro Tanaka

IPC分类号： H04B7/26

CPC分类号： H04W16/24 ,  H04W74/08

摘要： In a wireless communication system using the contention method, collisions between transmission signals sent from terminals to a base station are avoided, and a communication area is flexibly formed while suppressing unnecessary radiation of the communication area. The base station includes antennas disposed such that wireless zones cover mutually different areas, wireless units connected to the antennas in one-to-one correspondence, and for, via the respective antennas, receiving wireless signals from the terminal stations in the wireless zones and transmitting wireless signals to the terminal stations in the wireless zones, a data processing unit for processing the wireless signals received by the plurality of wireless units and generate data to be transmitted to the terminal stations, and a communication control unit for controlling the wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form mutually independent communication areas less than or equal in number to the antennas.

摘要翻译： 在使用争用方法的无线通信系统中，避免了从终端发送到基站的发送信号之间的冲突，并且在抑制通信区域的不必要的辐射的同时灵活地形成通信区域。 基站包括天线布置成使得无线区域覆盖相互不同的区域，一对一对应连接到天线的无线单元，并且经由各个天线，从无线区域中的终端站接收无线信号并发送 向无线区域中的终端站发送无线信号;数据处理单元，用于处理由多个无线单元接收到的无线信号，并生成要发送到终端站的数据;以及通信控制单元，用于控制无线单元，以便 在除了传输请求时隙之外的时隙中，形成组合所有天线的无线区域的一个通信区域，并且在传输请求时隙期间，形成数量小于或等于天线的相互独立的通信区域。

公开(公告)号：US07738540B2

公开(公告)日：2010-06-15

申请号：US11663066

申请日：2005-09-26

申请人： Hidetoshi Yamasaki ,  Hitoshi Takai ,  Hideki Nakahara ,  Kenji Miyanaga

发明人： Hidetoshi Yamasaki ,  Hitoshi Takai ,  Hideki Nakahara ,  Kenji Miyanaga

IPC分类号： H04L5/16

CPC分类号： H04B7/022 ,  H04W84/18

摘要： A wireless transmission system capable of performing a multi-station simultaneous transmission of data, that is, simultaneously transmitting data by wireless to a plurality of stations. The wireless transmission system includes a plurality of wireless stations for transmitting/receiving data and it constitutes a system for path diversity by use of a wireless station at the transmitting end, a multipath transmission path, and a wireless station at the receiving end. At least one of the plurality of wireless stations decides, in accordance with a response packet responsive to a multi-station simultaneous transmission request packet transmitted by the wireless station or other stations, a plurality of delay amounts relative to a reference timing during the multi-station simultaneous transmission in the wireless transmission system. It is arranged that each difference between the plurality of delay amounts be greater than a predetermined delay resolution and that the difference between the maximum and minimum values in the plurality of delay amounts be smaller than a predetermined maximum delay.

摘要翻译： 一种无线传输系统，能够进行数据的多站同时传输，即通过无线向多个站同时发送数据。 无线传输系统包括用于发送/接收数据的多个无线站，并且通过使用发送端的无线站，多径传输路径和接收端的无线站构成用于路径分集的系统。 所述多个无线站中的至少一个根据响应于由所述无线站或其他站发送的多站同时发送请求分组的响应分组，决定多个相对于所述多个时间段期间的基准定时的延迟量， 在无线传输系统中同时传输。 设置多个延迟量之间的每个差异大于预定延迟分辨率，并且多个延迟量中的最大值与最小值之间的差小于预定的最大延迟。

公开(公告)号：US07664093B2

公开(公告)日：2010-02-16

申请号：US10569730

申请日：2005-09-16

申请人： Kenji Miyanaga ,  Hideki Nakahara ,  Hidetoshi Yamasaki ,  Hitoshi Takai

发明人： Kenji Miyanaga ,  Hideki Nakahara ,  Hidetoshi Yamasaki ,  Hitoshi Takai

IPC分类号： H04J3/06

CPC分类号： H04L1/1887 ,  H04B7/022 ,  H04B7/026 ,  H04B7/0676 ,  H04B7/155 ,  H04L2001/0093 ,  H04W56/00 ,  H04W84/042 ,  H04W84/047

摘要： A wireless station capable of increasing the probability that a path diversity effect can be obtained in a case where a plurality of wireless stations transmit packets using a modulation/demodulation scheme with an anti-multipath property. A delay amount determining section (48) randomly selects a delay amount from among a plurality of candidate values. A transmission timing control section (47) determines a transmission start timing, at which to start the packet transmission, to be a timing obtained by delaying a reference timing by the delay amount selected by the delay amount determining section. At the transmission start timing, a modulation section (49) transmits the packet via an RF section (42) and an antenna (41). The difference between the candidate values is greater than or equal to a predetermined delay resolution, and the difference between a maximum candidate value and a minimum candidate value is less than or equal to a predetermined maximum delay.

摘要翻译： 能够增加在多个无线站使用具有抗多径性质的调制解调方式发送分组的情况下能够获得路径分集效果的概率的无线站。 延迟量确定部分（48）从多个候选值中随机选择延迟量。 发送定时控制部分47确定开始分组发送的发送开始定时是通过将参考定时延迟由延迟量确定部选择的延迟量而获得的定时。 在发送开始定时，调制部（49）经由RF部（42）和天线（41）发送分组。 候选值之间的差大于或等于预定延迟分辨率，并且最大候选值与最小候选值之间的差小于或等于预定最大延迟。