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公开(公告)号：US20150085809A1
公开(公告)日：2015-03-26
申请号：US14556938
申请日：2014-12-01
Inventor： Masayuki HOSHINO , Seigo Nakao , Daichi Imamura
IPC: H04L5/00
Abstract: A data alignment method capable of preventing degradation in demodulation performance due to variation in signal qualities when a data signal to which a Turbo code is applied is transmitted simultaneously from a plurality of cells. The method divides signal components to be used for data alignment into resources common to all the cells and resources dependent on the cells and transmits encoded and rate-matched data with the first half thereof aligned to the resources common to all the cells and the second half thereof aligned to the resources dependent on the cells.
Abstract translation: 当从多个单元同时传输当应用了Turbo码的数据信号时，能够防止由信号质量的变化引起的解调性能的劣化的数据对准方法。 该方法将用于数据对准的信号分量划分为所有小区和取决于小区的资源共有的资源，并发送编码和速率匹配的数据，其前半部分与所有小区共同的资源对准，下半部分 其对应于依赖于小区的资源。
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公开(公告)号：US08971296B2
公开(公告)日：2015-03-03
申请号：US14144249
申请日：2013-12-30
Inventor： Shinsuke Takaoka , Seigo Nakao , Daichi Imamura , Masayuki Hoshino
CPC classification number: H04W72/0453 , H04B7/0456 , H04J13/0059 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0021 , H04L5/0023 , H04L5/0041 , H04L5/0046 , H04L5/006 , H04L27/0008 , H04L27/2636
Abstract: A wireless communication terminal apparatus wherein even when a SC-FDMA signal is divided into a plurality of clusters and the plurality of clusters are then mapped to respective discontinuous frequency bands (when C-SC-FDMA is used), the improvement effect of system throughput can be maintained, while the user throughput can be improved. In the apparatus, a DFT unit (210) subjects a symbol sequence of time domain to a DFT process, thereby generating signals of frequency domain. A setting unit (211) divides the signals input from the DFT unit (210) into a plurality of clusters according to a cluster pattern that is in accordance with an MCS set, an encoding size, or the number of Ranks occurring during MIMO transmissions, which is indicated in those signals input, and then maps the plurality of clusters to the respective ones of a plurality of discontinuous frequency resources, thereby setting a constellation of the plurality of clusters in the frequency domain.
Abstract translation: 一种无线通信终端装置，其中即使当SC-FDMA信号被划分为多个群集并且多个群集然后被映射到各个不连续的频带（当使用C-SC-FDMA时），系统吞吐量的改善效果 可以维护，同时可以提高用户吞吐量。 在该装置中，DFT单元（210）将时域的符号序列进行DFT处理，从而产生频域的信号。 设置单元（211）根据在MIMO传输期间发生的MCS集合，编码大小或Rank数量的集群模式将从DFT单元（210）输入的信号划分为多个集群， 在这些信号输入中指示，然后将多个聚类映射到多个不连续频率资源中的相应的聚类，由此在频域中设置多个聚类的星座。
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公开(公告)号：US20150055618A1
公开(公告)日：2015-02-26
申请号：US14531897
申请日：2014-11-03
Inventor： Shinsuke Takaoka , Daichi Imamura , Seigo Nakao
CPC classification number: H04W72/042 , H04B1/713 , H04J1/02 , H04L5/0005 , H04L5/0012 , H04L27/2605
Abstract: Disclosed are a wireless communication apparatus and frequency hopping method which minimize the change in the instantaneous power distribution characteristics of the time waveform of transmission signals when a plurality of channels are multiplexed by frequency division. At a terminal (200), a mapping unit (212) maps the PUCCH to frequency resources of a first slot, maps the PUSCH to frequency resources, among the frequency resources of the first slot, separated exactly by predetermined frequency spacing (B) from the frequency resources to which the PUCCH is mapped, and cyclically shifts the frequencies so as to map the PUCCH and PUSCH to frequency resources, within an IDFT or IFFT bandwidth, of a second slot while maintaining the predetermined frequency spacing (B), thereby allowing frequency hopping of the PUCCH and PUSCH between the first slot and the second slot.
Abstract translation: 公开了一种无线通信装置和跳频方法，其中，当通过分频复用多个信道时，使传输信号的时间波形的瞬时功率分布特性的变化最小化。 在终端（200），映射单元（212）将PUCCH映射到第一时隙的频率资源，将PUSCH映射到第一时隙的频率资源中，将其精确地与预定的频率间隔（B）分离 PUCCH映射的频率资源，并循环地移动频率，以便在维持预定的频率间隔（B）的同时在第二时隙的IDFT或IFFT带宽内将PUCCH和PUSCH映射到频率资源，从而允许 第一时隙和第二时隙之间的PUCCH和PUSCH的跳频。
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公开(公告)号：US20140286272A1
公开(公告)日：2014-09-25
申请号：US14299814
申请日：2014-06-09
Inventor： Yoshihiko OGAWA , Daichi Imamura , Kenichi Miyoshi , Takashi Iwai , Tomofumi Takata
CPC classification number: H04L25/0258 , H04J13/0062 , H04J13/10 , H04L7/007 , H04L7/042 , H04W72/042
Abstract: Provided is a cyclic shift sequence generation method which can prevent coming of an interference wave into a desired wave detection window even if a cyclic shift sequence has a high mutual correlation in different bandwidths, thereby improving a channel estimation accuracy in a base station. In this method, a cyclic shift sequence number to be allocated to a cell is decided in advance. Moreover, when the cyclic shift amount between cyclic shift sequences allocated in cells is Δ1 and the cyclic shift amount of the cyclic shift sequences allocated between the cells is Δ2, Δ1 and Δ2 are made different when generating a cyclic shift sequence.
Abstract translation: 提供了一种循环移位序列生成方法，即使循环移位序列在不同带宽中具有高相互关系，也能够防止干扰波进入期望的波检测窗口，从而提高基站中的信道估计精度。 在该方法中，预先决定分配给单元的循环移位序列号。 此外，当在单元中分配的循环移位序列之间的循环移位量为＆Dgr1，并且在单元之间分配的循环移位序列的循环移位量为＆Dgr; 2，＆Dgr; 1和＆Dgr; 2在生成 循环移位序列。
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公开(公告)号：US20140286260A1
公开(公告)日：2014-09-25
申请号：US14294762
申请日：2014-06-03
Inventor： Takashi Iwai , Daichi Imamura , Akihiko Nishio , Yoshihiko Ogawa , Masaru Fukuoka
IPC: H04L5/00
CPC classification number: H04J11/0053 , H04B1/713 , H04B7/024 , H04B17/354 , H04J13/0062 , H04J13/0074 , H04L1/0026 , H04L1/20 , H04L5/0007 , H04L5/0035 , H04L5/0048 , H04L5/0051 , H04L5/0073 , H04L5/0091
Abstract: Provided are a wireless communication apparatus and a reference signal generating method, wherein inter-cell interference is reduced inside and outside a CoMP set. A CoMP mode setting unit (101) sets whether the terminal (100) thereof is a CoMP terminal or a Non-CoMP terminal. When the terminal (100) is set as a Non-CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, from among all the ZC sequence numbers that can be used within the system. When the terminal (100) is set as a CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, by hopping the ZC sequence numbers to be used within the CoMP set. A ZC sequence generating unit (105) generates a ZC sequence to be used as an SRS, using the calculated ZC sequence number.
Abstract translation: 提供了一种无线通信装置和参考信号生成方法，其中在CoMP集合内部和外部减小小区间干扰。 CoMP模式设置单元（101）设置其终端（100）是CoMP终端还是非CoMP终端。 当终端（100）被设置为非CoMP终端时，跳频图案计算单元（104）从系统中可以使用的所有ZC序列号中计算出用作发送定时的ZC序列号 。 当终端（100）被设置为CoMP终端时，跳频图案计算单元（104）通过跳转在CoMP集合内使用的ZC序列号来计算要用作发送定时的ZC序列号。 ZC序列生成部（105）使用计算出的ZC序列号，生成要用作SRS的ZC序列。
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Patent Agency Ranking
公开(公告)号：US12108373B2
公开(公告)日：2024-10-01
申请号：US18330118
申请日：2023-06-06
Inventor： Takashi Iwai , Daichi Imamura , Tomofumi Takata , Yoshihiko Ogawa
IPC: H04W72/0446 , H04J13/00 , H04J13/22 , H04W72/044 , H04W72/0453
CPC classification number: H04W72/0446 , H04J13/0055 , H04J13/0062 , H04J13/22 , H04W72/0453 , H04W72/0466
Abstract: It is an object to provide a sequence allocating method that, while maintaining the number of Zadoff-Chu sequences to compose a sequence group, is configured to make it possible to reduce correlations between different sequential groups. This method comprises the steps of setting a standard sequence with a standard sequence length and a standard sequence number in a step, setting a threshold value in accordance with an RB number in a step, setting a sequence length corresponding to RB number in a step, judging whether ¦r/N−rb/Nb¦=Xth(m) is satisfied in a step, including a plurality of Zadoff-Chu sequences with a sequence number and a sequence length in a sequence group in a step if the judgment is positive, and allocating the sequence group to the same cell in a step.
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公开(公告)号：US09820274B2
公开(公告)日：2017-11-14
申请号：US15053963
申请日：2016-02-25
Inventor： Zhi Zhang , Ming Xu , Masayuki Hoshino , Daichi Imamura , Akihiko Nishio
CPC classification number: H04W72/044 , H04L5/0016 , H04L5/0051 , H04L25/0226 , H04L27/2613 , H04W72/121
Abstract: Method of scrambling signals, transmission point device, and user equipment using the method are provided. The method includes: sending an ID table to a user equipment through higher layer signaling, the ID table being a subset of the whole ID space and containing available IDs for the user equipment; notifying the user equipment an ID in the ID table to be used through physical layer signaling or UE specific higher layer signaling; generating a random seed based on the notified ID; initializing a scrambling sequence by the random seed; and scrambling the signals with the initialized scrambling sequence. The method of the disclosure, by combining physical layer signaling and higher layer signaling, may notify the used group ID and the blind detection space to a UE, wherein the blind detection for the UE is enabled and the signaling overhead is reduced.
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58.发明授权公开(公告)号：US09813263B2
公开(公告)日：2017-11-07
申请号：US14378071
申请日：2013-02-22
Inventor： Takashi Iwai , Daichi Imamura , Akihiko Nishio , Yoshihiko Ogawa , Kazuki Takeda
IPC: H04J1/16 , H04L25/02 , H04J13/22 , H04J11/00 , H04J13/00 , H04B7/024 , H04L5/00 , H04L25/03 , H04B7/0452 , H04W84/04
CPC classification number: H04L25/024 , H04B7/024 , H04B7/0452 , H04J11/005 , H04J13/0062 , H04J13/22 , H04L5/001 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0228 , H04L25/03159 , H04L2025/03426 , H04W84/042
Abstract: The present invention adopts a configuration such that when cooperative reception by a plurality of base stations is not applied, a reference signal sequence determined from a selection baseline value corresponding to the number of a sequence group allocated to a cell belonging to the device in question is selected from among a plurality of selection baseline values as a reference signal sequence for non-cooperative reception, whereas when cooperative reception by a plurality of base stations is applied, a reference signal sequence determined from one or more intermediate selection baseline values set between two adjacent selection baseline values corresponding to the number of a sequence group allocated individually to a terminal device is selected among the plurality of selection baseline values as a reference signal sequence for cooperative reception differing from the reference signal sequence for non-cooperative reception.
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公开(公告)号：US09680683B2
公开(公告)日：2017-06-13
申请号：US14192085
申请日：2014-02-27
Inventor： Kenichi Miyoshi , Akihiko Nishio , Takashi Iwai , Sadaki Futagi , Katsuhiko Hiramatsu , Daichi Imamura , Takashi Aramaki
CPC classification number: H04L27/2666 , H04L25/03159 , H04L27/2607 , H04L27/2646 , H04L27/2647 , H04L27/2662
Abstract: A radio receiver apparatus that can effectively utilize GI to improve the reception quality. In this apparatus, a data extracting part extracts a data portion of a direct wave from a signal subjected to a radio reception process by a received RF part. A GI extracting part extracts, from the signal subjected to the radio reception process by the received RF part, GI having a length determined by an extracted GI length deciding part. The extracted GI is adjusted by a data position adjusting part such that its rear end coincides with the read end of the extracted data portion. A combining part combines the extracted data portion with the GI the data position of which has been adjusted. The combined signal is then supplied to a frequency axis equalizing part, which equalizes the signal distortions of the combined signal on the frequency axis.
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公开(公告)号：US20160330727A1
公开(公告)日：2016-11-10
申请号：US15216641
申请日：2016-07-21
Inventor： Daichi Imamura , Hidetoshi Suzuki , Akihiko Nishio , Atsushi Matsumoto
Abstract: Provided are a radio transmission device and a radio transmission method capable of improving downlink and uplink throughput even when performing dynamic symbol allocation. In the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method, and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, Index corresponding to the basic TF is reported from BS to MS.
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