公开(公告)号：US5825820A

公开(公告)日：1998-10-20

申请号：US264616

申请日：1994-06-23

申请人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

发明人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

IPC分类号： H03G3/30 ,  H04L25/03 ,  H04L27/20 ,  H04L27/36 ,  H04L27/00

CPC分类号： H03G3/3089 ,  H03G3/3047 ,  H04L25/03859 ,  H04L27/2067 ,  H04L27/362

摘要： In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuous mode.

公开(公告)号：US5901179A

公开(公告)日：1999-05-04

申请号：US657959

申请日：1996-06-04

申请人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

发明人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

IPC分类号： H03G3/30 ,  H04L25/03 ,  H04L27/20 ,  H04L27/36 ,  H04L27/00

CPC分类号： H03G3/3089 ,  H03G3/3047 ,  H04L25/03859 ,  H04L27/2067 ,  H04L27/362

摘要： In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuous mode.

摘要翻译： 在使用信息数据作为分组执行突发传输的发送机中，如果状态被分为四种模式，即突发停止模式，突发上升模式，突发连续模式和突发下降模式，设计为读取的波形整形设备 从两个存储器表中的任一个的输出中输出每个模式的形状波形数据，第一存储表保存用于突发上升模式和突发下降模式中共同使用的特定数据模式的波形数据，以及第二存储器表，其保存用于 在脉冲串连续模式中使用的所有数据模式，或波形整形设备，包括保存与突发上升模式中使用的所有数据模式对应的波形数据的第三存储器表，以及保存对应于所有数据模式的波形数据的第四存储器表 用于突发下降模式，并通过在t处合成第三和第四存储器表的两个输出来产生形状波形数据 他连续时间连续模式。

公开(公告)号：US06243422B1

公开(公告)日：2001-06-05

申请号：US09081031

申请日：1998-05-18

申请人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

发明人： Yoshio Urabe ,  Shouichi Koga ,  Hitoshi Takai ,  Koji Kai ,  Hidetoshi Yamasaki

IPC分类号： H04L2700

CPC分类号： H03G3/3089 ,  H03G3/3047 ,  H04L25/03859 ,  H04L27/2067 ,  H04L27/362

摘要： In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuous mode.

摘要翻译： 在使用信息数据作为分组执行突发传输的发送机中，如果状态被分为四种模式，即突发停止模式，突发上升模式，突发连续模式和突发下降模式，设计为读取的波形整形设备 从两个存储器表中的任一个的输出中输出每个模式的形状波形数据，第一存储表保存用于突发上升模式和突发下降模式中共同使用的特定数据模式的波形数据，以及第二存储器表，其保存用于 在脉冲串连续模式中使用的所有数据模式，或波形整形设备，包括保存与突发上升模式中使用的所有数据模式对应的波形数据的第三存储器表，以及保存对应于所有数据模式的波形数据的第四存储器表 用于突发下降模式，并通过在t处合成第三和第四存储器表的两个输出来产生形状波形数据 他连续时间连续模式。

公开(公告)号：US5504774A

公开(公告)日：1996-04-02

申请号：US169529

申请日：1993-12-20

申请人： Hitoshi Takai ,  Yoshio Urabe ,  Hidetoshi Yamasaki

发明人： Hitoshi Takai ,  Yoshio Urabe ,  Hidetoshi Yamasaki

IPC分类号： H04B1/707 ,  H04K1/10

CPC分类号： H04B1/70718

摘要： A data transmitting and receiving apparatus is disclosed. The receiving apparatus receives a spread spectrum signal prepared by modulating a carrier wave with data to produce a data modulated signal and multiplying the data modulated signal with a spreading signal which has a bandwidth greater than that of the data modulated signal. The receiving apparatus may include three bandpass filters for passing three different band portions of a full band of the spread spectrum signal and producing an intermediate signal, and a detector for detecting data from the intermediate signal and for producing a detector output. The apparatus may also include a reception state evaluation device for detecting the current reception state of the detector and for producing a poor reception signal, when the detector is in a poor reception state. The poor reception signal is used for changing from a current band to another band.

摘要翻译： 公开了一种数据发送和接收装置。 接收装置接收通过用数据调制载波准备的扩频信号，以产生数据调制信号，并将数据调制信号与带宽大于数据调制信号的带宽的扩展信号相乘。 接收装置可以包括三个带通滤波器，用于通过扩展频谱信号的全带的三个不同频带部分并产生中间信号;以及检测器，用于从中间信号检测数据并产生检测器输出。 当检测器处于不良接收状态时，该装置还可以包括用于检测检测器的当前接收状态并用于产生不良接收信号的接收状态评估装置。 差的接收信号用于从当前频带改变到另一频带。

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：US5828707A

公开(公告)日：1998-10-27

申请号：US731830

申请日：1996-10-21

申请人： Yoshio Urabe ,  Hitoshi Takai ,  Hidetoshi Yamasaki

发明人： Yoshio Urabe ,  Hitoshi Takai ,  Hidetoshi Yamasaki

IPC分类号： H04L27/227 ,  H04L27/233 ,  H03D3/22 ,  H04L27/22

CPC分类号： H04L27/2331

摘要： A differential detecting apparatus includes samplers 1 and 2, differential detection calculating unit 3, and two post-detection filters 4 and 5. Differential detection calculating unit 3 performs a differential detection with time-division multiplexing on data output from these samplers and alternately outputs a data sequence of a part of cosine component of the phase difference of the modulated signal and a data sequence of the rest of the cosine component. Differential detection calculating unit 3 also alternately outputs a data sequence of a part of sine component of the phase difference and a data sequence of the rest of the sine component. Each of post-detection filters 4 and 5 includes linear interpolating filter 35 and integral filter 36 which are connected in series. The linear interpolating filter 35 obtains a moving average from successive three pieces of input data weighted by 1:2:1 and the integral filter 36 obtains an integral value from successive k pieces of input data.

摘要翻译： 差分检测装置包括采样器1和2，差分检测计算单元3和两个检测后滤波器4和5.差分检测计算单元3对从这些采样器输出的数据进行时分复用执行差分检测，并交替地输出 调制信号的相位差的余弦分量的一部分的数据序列和余弦分量的其余部分的数据序列。 差分检测计算单元3还交替地输出相位差的正弦分量的一部分的数据序列和正弦分量的其余部分的数据序列。 后检测滤波器4和5中的每一个包括串联连接的线性内插滤波器35和积分滤波器36。 线性内插滤波器35从由1:2:1加权的连续三个输入数据中获得移动平均，并且积分滤波器36从连续的k个输入数据获得积分值。

公开(公告)号：US06181749B2

公开(公告)日：2001-01-30

申请号：US09182063

申请日：1998-10-29

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

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

IPC分类号： H04B708

CPC分类号： H01Q3/267 ,  H04B7/0817 ,  H04B7/0888 ,  H04L1/06

摘要： A demodulator 1 obtains demodulated data in a plurality of channels. Estimating portions 2a and 2b estimate and output the numbers of erroneous symbols and error locations thereof in the demodulated data. A data comparator 3 compares the demodulated data corresponding to the error locations with the demodulated data in the corresponding locations in other channels to determine whether the error location is correct, and it outputs a decision signal in response to the determination. A data selector 4 selects one of the demodulated data in the plurality of channels on the basis of the numbers of erroneous symbols and the decision signals and outputs the data as selected data. It is then possible to maintain the reliability of error detection even when a less redundant short error detecting code is used, and also to accurately select a channel of good quality even when the demodulated data in all channels contain the same extent of errors.

摘要翻译： 解调器1获得多个信道中的解调数据。 估计部分2a和2b估计并输出解调数据中的错误符号和错误位置的数目。 数据比较器3将对应于错误位置的解调数据与其他通道中的相应位置中的解调数据进行比较，以确定错误位置是否正确，并且响应于该确定而输出判定信号。 数据选择器4基于错误符号和判定信号的数量选择多个信道中的解调数据中的一个，并输出数据作为选择的数据。 即使当使用较少冗余的短错误检测码时也可以保持错误检测的可靠性，并且即使当所有信道中的解调数据包含相同的错误程度时，也可以准确地选择质量良好的信道。

公开(公告)号：US5454012A

公开(公告)日：1995-09-26

申请号：US227111

申请日：1994-04-13

申请人： Hitoshi Takai ,  Yoshio Urabe ,  Hidetoshi Yamasaki

发明人： Hitoshi Takai ,  Yoshio Urabe ,  Hidetoshi Yamasaki

IPC分类号： H04B14/06 ,  H04L27/18 ,  H04L27/20 ,  H04L27/04

CPC分类号： H04L27/18

摘要： A digital signal transmission device for transmitting a signal generated by modulating a carrier wave according to a binary or M-ary data sequence. Such device comprises a differentially encoding unit for converting the original data sequence into a transmission data sequence, a waveform generation unit for.degree. generating a phase transition waveform in each time slot which corresponds to each data included in the transmission data sequence, and a modulation unit for modulating the carrier wave according to a signal which has the phase transition waveform generated by the waveform generation unit. The information to be transmitted is present in a difference between two data which are spaced form each other by a prescribed time slots. The phase transition waveform includes a center part and a connection part for linking the center parts in adjacent time slots where a phase transition waveform in the center part of a present time slot is generated according to a corresponding data, then a phase transition waveform in the connection part is generated to continue on the phase transition waveform in the center parts of time slots succeeding to and preceding the present time slot without having a discontinuity even at the linking point.

摘要翻译： 一种数字信号传输装置，用于发送根据二进制或多元数据序列调制载波产生的信号。 这种装置包括用于将原始数据序列转换成发送数据序列的差分编码单元，用于在与发送数据序列中包括的每个数据相对应的每个时隙中产生相位变化波形的DEG的波形生成单元和调制单元 用于根据具有由波形生成单元生成的相变波形的信号来调制载波。 要发送的信息以彼此间隔开规定时隙的两个数据之间的差异存在。 相变波形包括中心部分和连接部分，用于根据相应的数据链接当前时隙的中心部分中的相位变化波形的相邻时隙中的中心部分，然后在 生成连接部分，以便在当前时隙之前和之前的时隙的中心部分的相位转变波形上继续，而不会在连接点处具有不连续性。

公开(公告)号：US5561673A

公开(公告)日：1996-10-01

申请号：US227446

申请日：1994-04-14

申请人： Hitoshi Takai ,  Hidetoshi Yamasaki ,  Yoshio Urabe

发明人： Hitoshi Takai ,  Hidetoshi Yamasaki ,  Yoshio Urabe

IPC分类号： H04B7/08 ,  H04L1/06 ,  H04L1/20

CPC分类号： H04B7/0888 ,  H04B7/0814 ,  H04B7/082 ,  H04L1/06

摘要： An antenna switched diversity receiver comprising a plurality of physically separated antennas, a switching unit for selectively switching to one of the plurality of antennas to receive a burst in a time series, a decoding unit for decoding transmission data contained in the received burst in a reversed manner to coding, a bit-error-detecting unit for detecting a bit error in decoded data in each received burst, and a control unit for controlling the switching unit in accordance with the bit-error detection result. The receiver may additionally include a RSSI (received signal strength indicator) checking unit for checking a RSSI of a switched antenna and a RSSI holding unit for holding a RSSI. The receiver constructed as above controls switching based on detection of at least one bit error in each of m consecutive bursts burst alone or together with the RSSI. As a result, the receiver obtains excellent diversity effect while being compact and economical.

摘要翻译： 一种天线切换分集接收机，包括多个物理分离的天线，切换单元，用于选择性地切换到所述多个天线中的一个天线以按时间序列接收脉冲串;解码单元，用于将包含在所接收的脉冲串中的发送数据逆转 用于检测每个接收脉冲串中的解码数据中的比特误差的比特误差检测单元，以及用于根据比特误差检测结果控制切换单元的控制单元。 接收机还可以包括用于检查交换天线的RSSI的RSSI（接收信号强度指示符）检查单元和用于保持RSSI的RSSI保持单元。 如上构造的接收机基于对单独的m个连续突发突发中的每一个中的至少一个比特错误的检测或与RSSI一起来控制切换。 结果，接收器在紧凑且经济的情况下获得优异的分集效应。

公开(公告)号：US5760629A

公开(公告)日：1998-06-02

申请号：US683309

申请日：1996-07-18

申请人： Yoshio Urabe ,  Hitoshi Takai ,  Hidetoshi Yamasaki ,  Akihiro Tatsuta

发明人： Yoshio Urabe ,  Hitoshi Takai ,  Hidetoshi Yamasaki ,  Akihiro Tatsuta

IPC分类号： H03G3/20 ,  H03F1/30 ,  H03F3/34 ,  H03L5/00

CPC分类号： H03F1/30

摘要： A level detector 2 detects variation of the amplitude of an input signal a to output a level signal b representing HIGH or LOW in order to define the head portion of the input circuit a. A time constant control signal 3 generates a time constant control signal c based on the level signal b to control a time constant of an estimator 4 so as to make the time constant small for a prescribed period from a time when the level signal b varies from HIGH to LOW. The estimator 4 estimates DC offset included in the input signal a with the a time constant variation according to the time constant control signal c to output an estimate d. A compensator 1 subtracts the estimate d from the input signal a to obtain a compensation output. Therefore, in the estimator 4, the speed of estimating the DC offset is different between a period corresponding to the head portion of the input signal a and other periods. Thus, a DC offset compensation device can be configured to be capable of fast DC offset compensation at the head portion of the input signal a and stable DC offset compensation at the other portions.

摘要翻译： 电平检测器2检测输入信号a的振幅的变化，以输出表示HIGH或LOW的电平信号b，以便限定输入电路a的头部。 时间常数控制信号3基于电平信号b产生时间常数控制信号c，以控制估计器4的时间常数，使得从电平信号b变化的时间起使指定时间段的时间常数小 高到低。 估计器4估计包括在输入信号a中的DC偏移与根据时间常数控制信号c的时间常数变化以输出估计d。 补偿器1从输入信号a中减去估计值d以获得补偿输出。 因此，在估计器4中，估计DC偏移的速度在对应于输入信号a的头部的周期与其它周期之间是不同的。 因此，DC偏移补偿装置可以被配置为能够在输入信号a的头部处具有快速DC偏移补偿，而在其它部分能够进行稳定的DC偏移补偿。