公开(公告)号：US06636723B1

公开(公告)日：2003-10-21

申请号：US09359020

申请日：1999-07-22

申请人： Keiichi Kitagawa ,  Mitsuru Uesugi

发明人： Keiichi Kitagawa ,  Mitsuru Uesugi

IPC分类号： H04B7216

CPC分类号： H04B7/2628 ,  H04B1/707 ,  Y02D70/40 ,  Y02D70/449

摘要： In a CDMA transmission, a quality of each symbol of a frame is held constant by interleaving spread chip, while overhead and interference amounts in other cells are reduced by easing a rate of transmission power control. Further, transmission power is decreased by discontinuing transmission at the time the quality is satisfied, thereby increasing the system capacity. Furthermore, it is possible to achieve more remarkable effect by performing inverse transmission power control.

摘要翻译： 在CDMA传输中，帧的每个符号的质量通过交错扩展芯片保持不变，而通过减少传输功率控制的速率来降低其他小区中的开销和干扰量。 此外，通过在质量满足时中止传输来降低发送功率，从而增加系统容量。 此外，可以通过执行逆发送功率控制来实现更显着的效果。

公开(公告)号：US5946350A

公开(公告)日：1999-08-31

申请号：US736730

申请日：1996-10-25

申请人： Mitsuru Uesugi

发明人： Mitsuru Uesugi

IPC分类号： H03H21/00 ,  H04B3/10 ,  H04B7/005 ,  H04L25/03 ,  H03H7/30 ,  H03K5/159

CPC分类号： H04L25/03146

摘要： A data receiving system, for equalizing a reception signal by using a decision feedback equalizer when the reception signal is formatted to have a sync signal positioned at the center of a burst, comprises a receiving buffer for storing reception data, training calculation means for obtaining a tap coefficient by performing a training using the sync signal involved in the reception data, a direction selecting means for selecting a preferable direction for a tracking of the decision feedback equalizer, based on a judgement as to which direction is preferable for the decision feedback equalizer between the direction identical with the receiving sequence of the reception data and the direction opposed to the receiving sequence of the reception data, and a tracking calculation means for performing the calculation of the decision feedback equalizer by tracking the reception data along the preferable direction using the tap coefficient given from the training calculation means having executed the training along the preferable direction selected by the direction selecting means. With this arrangement, the decision feedback equalizer can be used in the minimum phase transition which is the most effective condition for the DFE, thereby enhancing the effect of compensating the distortion derived from the multipath fading.

摘要翻译： 一种数据接收系统，用于当接收信号被格式化为具有位于突发中心的同步信号时通过使用判决反馈均衡器对接收信号进行均衡，包括用于存储接收数据的接收缓冲器，用于获得接收信号的训练计算装置 通过使用在接收数据中涉及的同步信号进行训练来进行训练的抽头系数;方向选择装置，用于根据对于决策反馈均衡器的哪个方向优选的判定来选择用于跟踪判决反馈均衡器的优选方向 与接收数据的接收序列和与接收数据的接收序列相反的方向相同的方向，以及跟踪计算装置，用于通过使用抽头跟踪沿着优选方向的接收数据来执行判决反馈均衡器的计算 从具有执行的训练计算装置给出的系数 d沿着由方向选择装置选择的优选方向的训练。 通过这种布置，判决反馈均衡器可以用作DFE最有效条件的最小相位转换，从而增强补偿从多径衰落导出的失真的效果。

公开(公告)号：US5459683A

公开(公告)日：1995-10-17

申请号：US277826

申请日：1994-07-20

申请人： Mitsuru Uesugi ,  Kouichi Honma

发明人： Mitsuru Uesugi ,  Kouichi Honma

IPC分类号： G06F17/10 ,  G06F7/544 ,  G06F7/552 ,  G06F7/38

CPC分类号： G06F9/30021 ,  G06F7/544 ,  G06F7/552 ,  G06F2207/5525

摘要： A first digital signal of a serial form is processed into a second digital signal of a serial form. The second digital signal represents an absolute value of a value represented by the first digital signal. A third digital signal of a serial form is processed into a fourth digital signal of a serial form. The fourth digital signal represents an absolute value of a value represented by the third digital signal. The values represented by the first and third digital signals are compared to generate a comparison-result digital signal representing a result of the comparison. A calculation-result digital signal of a serial form is generated in response to the second digital signal, the fourth digital signal, and the comparison-result digital signal. The calculation-result digital signal represents a value which is approximate to a square root of a sum of a square of the value represented by the first digital signal and a square of the value represented by the third digital signal.

摘要翻译： 将串行形式的第一数字信号处理成串行形式的第二数字信号。 第二数字信号表示由第一数字信号表示的值的绝对值。 串行形式的第三数字信号被处理成串行形式的第四数字信号。 第四数字信号表示由第三数字信号表示的值的绝对值。 将由第一和第三数字信号表示的值进行比较以产生表示比较结果的比较结果数字信号。 响应于第二数字信号，第四数字信号和比较结果数字信号产生串行形式的计算结果数字信号。 计算结果数字信号表示近似于由第一数字信号表示的值的平方和与由第三数字信号表示的值的平方的和的平方根的值。

公开(公告)号：US5388123A

公开(公告)日：1995-02-07

申请号：US871810

申请日：1992-04-21

申请人： Mitsuru Uesugi ,  Kazuhisa Tsubaki ,  Kouichi Honma

发明人： Mitsuru Uesugi ,  Kazuhisa Tsubaki ,  Kouichi Honma

IPC分类号： H03H17/00 ,  H03H15/00 ,  H03H17/06 ,  H03H21/00 ,  H04B3/14 ,  H04B7/005 ,  H04B7/26 ,  H04L25/03 ,  H03K5/159

CPC分类号： H04L25/03044 ,  H03H17/06 ,  H04L25/03057 ,  H04L2025/03573 ,  H04L2025/03579

摘要： According to the present invention, a large compensation effect can be obtained in a small operation volume regardless of which one of a distortion due to a frequency selective fading and a distortion due to an interference of adjacent waves is ruling. In the present invention, a principal wave signal and signals of channels adjacent to both sides of said principal wave are taken out, and power of these signals is compared to select either one of the fractional interval equalizer and the linear decision feedback equalizer.

摘要翻译： 根据本发明，可以在小的操作体积中获得大的补偿效果，而不管由于频率选择性衰落引起的失真和由于相邻波浪的干扰引起的变形。 在本发明中，取出主波信号和与主波两侧相邻的声道的信号，比较这些信号的功率，选择分数间隔均衡器和线性判决反馈均衡器中的任一个。

公开(公告)号：US07995663B2

公开(公告)日：2011-08-09

申请号：US11917745

申请日：2006-06-21

申请人： Yuta Seki ,  Mitsuru Uesugi ,  Eiji Ota

发明人： Yuta Seki ,  Mitsuru Uesugi ,  Eiji Ota

IPC分类号： H04L27/28

CPC分类号： H04L27/2623

摘要： To narrow the dynamic range of multicarrier signals and prevent both the increment of cost and the degradation of power efficiency. A modulating part (101) modulates transport data. An S/P converting part (102) performs an S/P conversion of a modulated symbol and outputs the modulated symbols, the number of which is the same as the number of all subcarriers, to an IFFT part (103) in parallel. The IFFT part (103) assigns the modulated symbols to the subcarriers, the frequencies of which are orthogonal to each other, to perform an inverse fast Fourier transform. A P/S converting part (104) performs a P/S conversion of the signals of time domain. When the instantaneous amplitude level of an OFDM signal is lower than a predetermined threshold value, a pit clip part (105) replaces this amplitude level by the predetermined threshold value. In other words, when the instantaneous power of the OFDM signal is close to zero, the pit clip part (105) converts a power value to a value that is greater than the actual power value.

摘要翻译： 缩小多载波信号的动态范围，防止成本增加和功率效率的退化。 调制部（101）调制传输数据。 S / P转换部分（102）执行调制符号的S / P转换，并且将其数量与所有子载波数相同的调制符号并行地输出到IFFT部分（103）。 IFFT部分（103）将调制符号分配给彼此正交的频率的子载波，以执行快速傅立叶逆变换。 P / S转换部（104）进行时域信号的P / S转换。 当OFDM信号的瞬时幅度电平低于预定阈值时，凹坑夹部分（105）将该幅度电平取代预定阈值。 换句话说，当OFDM信号的瞬时功率接近零时，凹坑夹部分（105）将功率值转换成大于实际功率值的值。

公开(公告)号：US07583736B2

公开(公告)日：2009-09-01

申请号：US10516181

申请日：2003-09-09

申请人： Kenichi Miyoshi ,  Mitsuru Uesugi

发明人： Kenichi Miyoshi ,  Mitsuru Uesugi

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2615 ,  H04L1/0041 ,  H04L1/0068 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/0046

摘要： Of systematic bits (S) and parity bits (P1, P2) generated by coding (coding rate R=1/3) transmission bits, subcarriers to which parity bits are mapped are designated as candidates for transmission cancellation and subcarriers not to be transmitted are selected from among those candidates. When this selection is made, a selection pattern which corresponds to minimum peak power of an OFDM symbol is used based on values of parity bits and phase relationship between subcarriers.

摘要翻译： 通过编码（编码率R = 1/3）生成的系统比特（S）和奇偶校验位（P1，P2）中，将奇偶校验位映射的副载波指定为用于发送取消的候选，并且不发送的子载波 从这些候选人中选出。 当进行该选择时，基于奇偶校验位的值和子载波之间的相位关系使用对应于OFDM符号的最小峰值功率的选择模式。

公开(公告)号：US20090046787A1

公开(公告)日：2009-02-19

申请号：US11813722

申请日：2005-12-27

申请人： Mitsuru Uesugi ,  Eiji Ota ,  Atsushi Sumasu ,  Keisuke Ebiko

发明人： Mitsuru Uesugi ,  Eiji Ota ,  Atsushi Sumasu ,  Keisuke Ebiko

IPC分类号： H04L27/28

CPC分类号： H04L25/022 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0232 ,  H04L25/03159 ,  H04L25/03891 ,  H04L2025/03414 ,  H04L2025/03522

摘要： A transmitting apparatus, a receiving apparatus and a wireless communication method for suppressing interference between codes, while further reducing the ratio of redundant components occupying a signal to improve the transmission efficiency. The transmitting apparatus (100) transmits a signal having a frame structure in which a plurality of symbols follow a pilot symbol to which a guard interval has been added. In the receiving apparatus (200) that receives that signal, a long FFT target section acquiring part (202) acquires, from the received OFDM signal, a long FFT target section that is a target section in which delay waves are to be removed by use of a pilot symbol. A long FFT part (203) performs a fast Fourier transformation of the long FFT target section to convert it to a frequency domain signal. A frequency equalizing part (204) performs a frequency equalization of the long FFT target section by use of an interpolation result of communication line estimation value. A long IFFT part (205) performs an inverse fast Fourier transformation of the long FFT target section as frequency equalized to convert it back to a time domain signal.

摘要翻译： 一种用于抑制代码之间的干扰的发送装置，接收装置和无线通信方法，同时进一步减少占用信号的冗余部件的比率以提高传输效率。 发送装置（100）发送具有帧结构的信号，其中多个符号遵循已经添加有保护间隔的导频符号。 在接收到该信号的接收装置（200）中，长FFT对象部分获取部（202）从接收到的OFDM信号中获取作为要使用的移除延迟波的目标部分的长FFT对象部 的飞行员符号。 长FFT部（203）对长FFT对象部进行快速傅里叶变换，将其变换为频域信号。 频率均衡部分（204）通过使用通信线路估计值的内插结果来执行长FFT对象部分的频率均衡。 长IFFT部分（205）执行长FFT目标部分的快速傅立叶逆变换作为均衡的频率，以将其转换回到时域信号。

公开(公告)号：US20090022233A1

公开(公告)日：2009-01-22

申请号：US11911700

申请日：2006-04-10

申请人： Mitsuru Uesugi ,  Eiji Ota

发明人： Mitsuru Uesugi ,  Eiji Ota

IPC分类号： H04L27/28

CPC分类号： H04L27/2647 ,  H04B1/719 ,  H04L27/2623

摘要： A radio receiving apparatus wherein the interference can be minimized and the power and bands can be effectively used in the process of receiving a signal comprising a combination of an impulse signal and an OFDM signal. In this apparatus, a transmission path equalizing part (205) performs a transmission path equalizing process of a signal comprising a combination of an OFDM signal and an impulse signal of UWB-IR system, and a signal separating part (208) uses a constant (C) to clip the amplitude level for a signal (Y1) demodulated as the OFDM signal, and substantially clips only the signal components of the impulse signal. Further, only when a signal (Y2) demodulated as the impulse signal exhibits an amplitude level greater than the constant (C), it is outputted, while most of the signal power of the combined OFDM signal is removed.

摘要翻译： 一种无线电接收设备，其中可以使干扰最小化，并且在接收包括脉冲信号和OFDM信号的组合的信号的过程中可以有效地使用功率和频带。 在该装置中，传输路径均衡部（205）执行包括OFDM信号和UWB-IR系统的脉冲信号的组合的信号的传输路径均衡处理，信号分离部（208）使用常数（ C）对作为OFDM信号进行解调的信号（Y1）的幅度电平进行钳位，并且仅基本上剪切脉冲信号的信号分量。 此外，只有当作为脉冲信号解调的信号（Y2）表现出大于常数（C）的幅度电平时，才能输出组合的OFDM信号的大部分信号功率。

公开(公告)号：US20070286301A1

公开(公告)日：2007-12-13

申请号：US11597420

申请日：2005-05-24

申请人： Genichiro Ohta ,  Daichi Imamura ,  Keiji Takakusaki ,  Mitsuru Uesugi

发明人： Genichiro Ohta ,  Daichi Imamura ,  Keiji Takakusaki ,  Mitsuru Uesugi

IPC分类号： H04L5/12

CPC分类号： H04L27/2637 ,  H04L27/2649

摘要： A modulating device capable of generating an OFDM signal and having a drastically improved frequency use efficiency. The modulating device has modulators (6, 8 (11, 13, 106, 108, 111, 113)) for modulating a signal to be modulated and having a Nyquist roll-off frequency characteristic with a carrier frequency having a difference two times the Nyquist frequency and combiners (10(15, 110, 115)) for generating modulation output having a speed two times that of the signal to demodulated and the same Nyquist roll-off slope as the signal to be modulated by combining the outputs of the modulators (6, 8 (11, 13, 106, 108, 111, 113)). Thus a double speed wave can be superposed on the same frequency without varying the roll-off slope of the Nyquist characteristic, and therefore an OFDM signal (19) having a drastically improved frequency use efficiency is provided.

摘要翻译： 一种调制装置，能够产生OFDM信号并具有显着提高的频率使用效率。 调制装置具有用于调制要调制的信号并且具有奈奎斯特滚降频率特性的调制器（6,8（11,13,106,108,111,113）），其载波频率的差值是奈奎斯特 频率和组合器（10（15,110,115）），用于产生具有要解调的信号的速度的两倍的调制输出和与要调制的信号相同的奈奎斯特滚降斜率（通过组合调制器的输出） 6，8（11，13，106，108，111，113））。 因此，可以将双速波叠加在同一频率上，而不改变奈奎斯特特性的滚降斜率，因此提供了频率提高的频率使用效率的OFDM信号（19）。

公开(公告)号：US20070053280A1

公开(公告)日：2007-03-08

申请号：US10558678

申请日：2004-06-01

申请人： Mitsuru Uesugi

发明人： Mitsuru Uesugi

IPC分类号： H04J11/00 ,  H04B7/216

CPC分类号： H04L5/026 ,  H04B1/707

摘要： Each of communication terminals MS#1 to MS#N spreads transmission data using an orthogonal spreading code that is specific to each of the communication terminals, performs OFDM modulation on the spread signal and thereby forms an OFCDM signal, and base station BS receives the OFCDM signal from each of communication terminals MS #1 to MS#N, performs OFDM demodulation on the received signal, despreads the OFDM demodulated signal using the orthogonal spreading code that is specific to each of the communication terminals and thereby obtains transmission data from each of communication terminals

摘要翻译： 通信终端MS＃1至MS＃N中的每一个使用对每个通信终端特定的正交扩展码扩展发送数据，对扩展信号执行OFDM调制，从而形成OFCDM信号，基站BS接收OFCDM 通信终端MS＃1〜MS＃N的信号对接收信号进行OFDM解调，使用对每个通信终端特有的正交扩展码对OFDM解调信号进行解扩，从而从通信中获得发送数据 终端