公开(公告)号：US08107900B2

公开(公告)日：2012-01-31

申请号：US12089200

申请日：2005-10-06

申请人： Yuta Seki ,  Yasuhiro Hasegawa ,  Shinji Ueda

发明人： Yuta Seki ,  Yasuhiro Hasegawa ,  Shinji Ueda

IPC分类号： H04B1/04

CPC分类号： H04L27/2624

摘要： A multi-carrier transmission device improves peak suppression efficiency in a multi-carrier signal. The multi-carrier transmission device (100) has a peak suppression unit (140) for dividing a multi-carrier signal into two parts: a first multi-carrier signal and a second multi-carrier signal. A peak signal detection unit (142) detects a power value at a predetermined interval concerning the first multi-carrier signal. When the detected power value is equal to or above a predetermined level, a peak extraction unit (144) extracts a signal component equal to or above the predetermined level from the first multi-carrier signal. A band limit filter unit (146) passes only a predetermined band from the extracted signal component. An adder (154) subtracts the signal component after the band limit from the second multi-carrier signal. A multiplier (150) is arranged at a latter stage of the band limit filter unit (146) and multiplies a weight for compensating the power loss in the band limit filter unit (146) and the first multi-carrier signal.

摘要翻译： 多载波传输设备提高了多载波信号中的峰值抑制效率。 多载波传输设备（100）具有峰值抑制单元（140），用于将多载波信号分成两部分：第一多载波信号和第二多载波信号。 峰值信号检测单元（142）以关于第一多载波信号的预定间隔检测功率值。 当检测到的功率值等于或高于预定电平时，峰值提取单元（144）从第一多载波信号中提取等于或高于预定电平的信号分量。 带限滤波器单元（146）仅从提取的信号分量通过预定频带。 加法器（154）从第二多载波信号中减去频带限制之后的信号分量。 乘法器（150）被布置在频带限制滤波器单元（146）的后级，并且乘以用于补偿频带限制滤波器单元（146）中的功率损耗和第一多载波信号的权重。

公开(公告)号：US20100151803A1

公开(公告)日：2010-06-17

申请号：US12089200

申请日：2005-10-06

申请人： Yuta Seki ,  Yasuhiro Hasegawa ,  Shinji Ueda

发明人： Yuta Seki ,  Yasuhiro Hasegawa ,  Shinji Ueda

IPC分类号： H04B1/04

CPC分类号： H04L27/2624

摘要： A multi-carrier transmission device improves peak suppression efficiency in a multi-carrier signal. The multi-carrier transmission device (100) has a peak suppression unit (140) for dividing a multi-carrier signal into two parts: a first multi-carrier signal and a second multi-carrier signal. A peak signal detection unit (142) detects a power value at a predetermined interval concerning the first multi-carrier signal. When the detected power value is equal to or above a predetermined level, a peak extraction unit (144) extracts a signal component equal to or above the predetermined level from the first multi-carrier signal. A band limit filter unit (146) passes only a predetermined band from the extracted signal component. An adder (154) subtracts the signal component after the band limit from the second multi-carrier signal. A multiplier (150) is arranged at a latter stage of the band limit filter unit (146) and multiplies a weight for compensating the power loss in the band limit filter unit (146) and the first multi-carrier signal.

摘要翻译： 多载波传输设备提高了多载波信号中的峰值抑制效率。 多载波传输设备（100）具有峰值抑制单元（140），用于将多载波信号分成两部分：第一多载波信号和第二多载波信号。 峰值信号检测单元（142）以关于第一多载波信号的预定间隔检测功率值。 当检测到的功率值等于或高于预定电平时，峰值提取单元（144）从第一多载波信号中提取等于或高于预定电平的信号分量。 带限滤波器单元（146）仅从提取的信号分量通过预定频带。 加法器（154）从第二多载波信号中减去频带限制之后的信号分量。 乘法器（150）被布置在频带限制滤波器单元（146）的后级，并且乘以用于补偿频带限制滤波器单元（146）中的功率损耗和第一多载波信号的权重。

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：US20110128882A1

公开(公告)日：2011-06-02

申请号：US13055446

申请日：2009-08-27

申请人： Noriyuki Shimizu ,  Yuta Seki

发明人： Noriyuki Shimizu ,  Yuta Seki

IPC分类号： H04L12/26

CPC分类号： H04J11/0069 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0072 ,  H04L5/0053

摘要： A radio transmitter and a radio receiver which reduce the number of blind determinations of control signals while maintaining resource utilization efficiency. A radio transmitter (100) includes a hash value calculating section (131) for calculating a hash value from a bit sequence indicating the device ID of each device or a transmission destination, and arranges a plurality of control channel signals in the order in which the calculated hash value of the each device increases or decreases monotonously in a frequency region which is the mapping resource range of the control channel signals. A radio receiver (200) acquires the order in which the control channel signals arranged according to the hash value are arranged. Even when the terminal ID included in the control channel signal decoded first is not the terminal ID of the radio receiver (200), the radio receiver (200) predicts the range in which the control channel signal including the terminal ID of the radio receiver (200) exists in the order by comparing the hash values obtained from both the terminal IDs with each other.

摘要翻译： 一种无线电发射机和无线电接收机，其在保持资源利用效率的同时减少控制信号的盲确定次数。 无线发射机（100）包括：哈希值计算部（131），用于根据表示各设备的设备ID或发送目的地的比特序列来计算哈希值，并按照以下顺序排列多个控制信道信号： 每个设备的计算散列值在作为控制信道信号的映射资源范围的频率区域中单调增加或减小。 无线电接收机（200）获取根据哈希值排列的控制信道信号的顺序。 即使当包括在首先解码的控制信道信号中的终端ID不是无线电接收机（200）的终端ID时，无线电接收机（200）预测包括无线电接收机的终端ID的控制信道信号的范围 200）通过比较从两个终端ID获得的哈希值彼此之间的顺序存在。

公开(公告)号：US20110019697A1

公开(公告)日：2011-01-27

申请号：US12934129

申请日：2009-02-06

申请人： Yuta Seki ,  Richol Ku

发明人： Yuta Seki ,  Richol Ku

IPC分类号： H04J1/00

CPC分类号： H04L25/03343 ,  H04L5/0007 ,  H04L5/003

摘要： It is possible to provide an SC-FDMA transmission device and an SC-FDMA transmission signal formation method which improve the transmission efficiency of the SC-FDMA transmission signal. The SC-FDMA transmission device (100) performs the discrete Fourier transform process on a primary modulation signal sequence formed by N primary modulation symbols to obtain a plurality of frequency components, which are respectively mapped onto different subcarriers. The obtained SC-FDMA symbol is subjected to the inverse Fourier transform process before being transmitted. A propagation path information decoding unit (155) acquires frequency selection characteristic in a propagation path to/from a reception side. A cyclic shift unit (110) and a correlation characteristic judgment unit (115) adjust the frequency response of the SC-FDMA symbol according to the frequency selection characteristic. The adjustment is performed by a result of correlation obtained by performing a correlation calculation between the propagation path frequency selection characteristic and the SC-FDMA symbol.

摘要翻译： 可以提供提高SC-FDMA传输信号的传输效率的SC-FDMA传输设备和SC-FDMA传输信号形成方法。 SC-FDMA发送装置（100）对由N个一次调制符号构成的一次调制信号序列进行离散付里叶变换处理，得到分别映射到不同子载波上的多个频率成分。 所获得的SC-FDMA符号在发送之前进行傅立叶逆变换处理。 传播路径信息解码单元（155）获取与接收侧的传播路径中的频率选择特性。 循环移位单元（110）和相关特性判断单元（115）根据频率选择特性调整SC-FDMA符号的频率响应。 通过在传播路径频率选择特性和SC-FDMA符号之间进行相关计算得到的相关结果来进行调整。

公开(公告)号：US20100008402A1

公开(公告)日：2010-01-14

申请号：US12523976

申请日：2007-01-23

申请人： Tomohiro Sugawara ,  Yuta Seki ,  Hiroki Haga

发明人： Tomohiro Sugawara ,  Yuta Seki ,  Hiroki Haga

IPC分类号： H04B1/69

CPC分类号： H04B1/69 ,  H04B2001/6912

摘要： Reduction in the detection accuracy of synchronization timing at the receiving end is prevented even if a GCL system changes in response to a GCL ID. A transmitter (100) has a GCL system generating section (101) for generating a GCL system signal, a scramble processing section (102) for scrambling the GCL system signal, and a sub-carrier mapping section (103) for arranging the scrambled GCL system signal in a sub-carrier in the direction of a frequency. With this, the peak width of the differential correlation value of the GCL system at the receiving end is narrowed, so that accurate synchronization timing can be detected at the receiving end.

摘要翻译： 即使GCL系统响应于GCL ID而改变，也可以防止接收端的同步定时的检测精度的降低。 发射机（100）具有用于产生GCL系统信号的GCL系统产生部分（101），用于对GCL系统信号进行加扰的加扰处理部分（102）和用于安排加扰的GCL的子载波映射部分（103） 系统信号在子载波中的频率方向。 由此，接收端的GCL系统的差分相关值的峰值宽度变窄，能够在接收端检测精确的同步定时。

公开(公告)号：US09379861B2

公开(公告)日：2016-06-28

申请号：US13395593

申请日：2010-09-13

申请人： Yuta Seki

发明人： Yuta Seki

IPC分类号： H04L5/00 ,  H04B7/02 ,  H04B7/06 ,  H04W24/10 ,  H04W28/06 ,  H04W88/06

CPC分类号： H04L5/0035 ,  H04B7/024 ,  H04B7/0658 ,  H04W24/10 ,  H04W28/06 ,  H04W88/06

摘要： A radio base station apparatus wherein even when a single-base-station transmission and a plural-base-station cooperative transmission are implemented at the same time, the terminal-to-base-station feedback information amount and the inter-cell interference (ICI) can be reduced. A base station uses a first transmission mode, in which only the base station implements a signal transmission, and a second transmission mode, in which the base station implements a cooperative signal transmission together with another radio base station apparatus, to communicate with one or more radio terminal apparatuses. A setting unit sets, as a particular frequency band whose reception quality is to be measured, one of first and second frequency bands that are parts of a band used for communication with the terminals. A deciding unit decides, as the transmission mode for the terminals, one of the first and second transmissions based on the reception quality of the particular frequency band.

摘要翻译： 一种无线基站装置，即使在同时实现单基站发送和多基站协作发送的情况下，终端到基站反馈信息量和小区间干扰（ICI ）可以减少。 基站使用仅基站实现信号传输的第一传输模式和基站与另一无线基站装置一起实施协作信号传输的第二传输模式，以与一个或多个 无线终端装置。 设置单元将作为要测量接收质量的特定频带设置为用于与终端通信的频带的一部分的第一和第二频带中的一个。 决定单元基于特定频带的接收质量来决定作为终端的传输模式的第一和第二传输中的一个。

公开(公告)号：US08218681B2

公开(公告)日：2012-07-10

申请号：US12440894

申请日：2006-09-11

申请人： Yuta Seki

发明人： Yuta Seki

IPC分类号： H04L27/00

CPC分类号： H04L27/2656 ,  H04J11/0076 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0082 ,  H04L7/042 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675

摘要： An OFDM transmitter and receiver realizing high-speed cell search and having a reducible circuit scale. An OFDM transmitter includes an SCH inserting section for constructing a frame where a synchronization sequence in a predetermined position from the head of a first sub-frame is arranged and a synchronization sequence composed of the symbols of the former synchronization sequence and the symbols whose I, Q components are interchanged is arranged in a predetermined position from the head of a second sub-frame adjacent in the time-axis direction to the former sub-frame, an IFFT section, a P-SCH conversion section, and an RF transmitting section for transmitting this frame. Thus, the receiving end of the frame can locate the position of either synchronization sequence and determine the frame timing from that position, thereby increasing the speed of the cell search.

摘要翻译： 实现高速小区搜索并具有可缩减电路规模的OFDM发射机和接收机。 OFDM发送器包括：SCH插入部，用于构成从第一子帧的头部配置有预定位置的同步序列的帧，以及由前同步序列的符号和I， Q分量被交换在从时间轴方向相邻的第二子帧的头部到前一个子帧的预定位置，IFFT部分，P-SCH转换部分和RF发送部分 传输这个帧。 因此，帧的接收端可以定位任一同步序列的位置，并从该位置确定帧定时，从而增加小区搜索的速度。

公开(公告)号：US08130632B2

公开(公告)日：2012-03-06

申请号：US12594918

申请日：2007-04-06

申请人： Masahiko Nanri ,  Yuta Seki

发明人： Masahiko Nanri ,  Yuta Seki

IPC分类号： H04J11/00

CPC分类号： H04L25/03828 ,  H04B2001/0491 ,  H04L27/04

摘要： A transmitter which is capable of producing an SSB signal having a sharp spectrum cut. The transmitter generates the SSB signal using an FFT circuit (103) which Fourier-transforms a transmission symbol, a zero insertion circuit (104) which zeros the component of either the USB component signal or the LSB component signal outputted from the FFT circuit (103), an IFFT circuit (105) which inverse-Fourier-transforms the output from the zero insertion circuit (104), and a parallel-serial conversion circuit (106) which parallel-serial-converts the output from the IFFT circuit (105).

摘要翻译： 能够产生具有尖锐频谱切断的SSB信号的发射机。 发射机利用FFT电路（103）生成SSB信号，该FFT电路（103）对发送符号进行傅立叶变换，零插入电路（104），其将从FFT电路（103）输出的USB分量信号或LSB分量信号的分量置零 ），对来自零插入电路（104）的输出进行傅里叶变换的IFFT电路（105）以及并行串行转换来自IFFT电路（105）的输出的并行串行转换电路（106） 。

公开(公告)号：US08363677B2

公开(公告)日：2013-01-29

申请号：US12934129

申请日：2009-02-06

申请人： Yuta Seki ,  Richol Ku

发明人： Yuta Seki ,  Richol Ku

IPC分类号： H04J1/00 ,  H04J11/00 ,  H04W4/00 ,  H04B7/00

CPC分类号： H04L25/03343 ,  H04L5/0007 ,  H04L5/003

摘要： It is possible to provide an SC-FDMA transmission device and an SC-FDMA transmission signal formation method which improve the transmission efficiency of the SC-FDMA transmission signal. The SC-FDMA transmission device (100) performs the discrete Fourier transform process on a primary modulation signal sequence formed by N primary modulation symbols to obtain a plurality of frequency components, which are respectively mapped onto different subcarriers. The obtained SC-FDMA symbol is subjected to the inverse Fourier transform process before being transmitted. A propagation path information decoding unit (155) acquires frequency selection characteristic in a propagation path to/from a reception side. A cyclic shift unit (110) and a correlation characteristic judgment unit (115) adjust the frequency response of the SC-FDMA symbol according to the frequency selection characteristic. The adjustment is performed by a result of correlation obtained by performing a correlation calculation between the propagation path frequency selection characteristic and the SC-FDMA symbol.

摘要翻译： 可以提供提高SC-FDMA传输信号的传输效率的SC-FDMA传输设备和SC-FDMA传输信号形成方法。 SC-FDMA发送装置（100）对由N个一次调制符号构成的一次调制信号序列进行离散付里叶变换处理，得到分别映射到不同子载波上的多个频率成分。 所获得的SC-FDMA符号在发送之前进行傅立叶逆变换处理。 传播路径信息解码单元（155）获取与接收侧的传播路径中的频率选择特性。 循环移位单元（110）和相关特性判断单元（115）根据频率选择特性调整SC-FDMA符号的频率响应。 通过在传播路径频率选择特性和SC-FDMA符号之间进行相关计算得到的相关结果来进行调整。