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1. 发明授权

US09596010B2 Wireless communication apparatus and wireless communication method 有权
标题翻译：无线通信装置和无线通信方法
公开(公告)号：US09596010B2
公开(公告)日：2017-03-14
申请号：US14890671
申请日：2014-05-13
申请人： HITACHI KOKUSAI ELECTRIC, INC.
发明人： Takashi Yano , Keisuke Yamamoto
IPC分类号： H04B7/02 , H04B7/04 , H04W72/08 , H04B7/08 , H04B1/7107 , H04L25/03 , H04L1/00 , H04J11/00
CPC分类号： H04B7/0413 , H04B1/7107 , H04B1/71072 , H04B7/04 , H04B7/0854 , H04J11/004 , H04L1/0048 , H04L2025/03426 , H04W72/082
摘要： In a capacity region of a multiple access channel which is a theoretical limit, a combination of transmission speeds that are equal between the channels is realized. A wireless communication apparatus receives first to third frames, which are sequentially transmitted. The second frame is transmitted at a head time different from that of the first and third frames, and the second frame receives a first signal which is temporally superposed to both the first and third frames. A replica signal of the first frame is generated based on the result obtained by demodulating the first frame, and a second signal which is obtained by canceling it from the first signal is generated. The second frame is demodulated by using the second signal, and the interference from the first frame in the second frame in the second signal is canceled, and the interference from the third frame remains.
摘要翻译：在作为理论限制的多路访问信道的容量区域中，实现了信道之间相等的传输速度的组合。无线通信装置接收依次发送的第一至第三帧。第二帧在与第一和第三帧不同的头部时间发送，并且第二帧接收时间上叠加到第一和第三帧的第一信号。基于通过解调第一帧获得的结果生成第一帧的复制信号，并且生成通过从第一信号中取消它获得的第二信号。通过使用第二信号解调第二帧，并且消除来自第二信号中的第二帧中的第一帧的干扰，并且保留来自第三帧的干扰。

2. 发明授权

US09059829B2 Receiver and received signal decoding method 有权
标题翻译：接收和接收信号解码方法
公开(公告)号：US09059829B2
公开(公告)日：2015-06-16
申请号：US13756740
申请日：2013-02-01
申请人： Hitachi Kokusai Electric Inc.
发明人： Keisuke Yamamoto
IPC分类号： H04L27/06 , H04L1/00 , H04L1/08
CPC分类号： H04L1/0055 , H04L1/005 , H04L1/0071 , H04L1/08
摘要： In a receiver with a demodulator and a decoder performing iterative processing, a solution is provided for reducing the implementation cost of and improving the throughput of an interleaver and a deinterleaver. A receiver includes a symbol demapper outputting first extrinsic information by using one received symbol and a priori information, a check node decoder outputting second extrinsic information by using first extrinsic information and a priori information, a deinterleaver deinterleaving second extrinsic information, a variable node decoder outputting third extrinsic information by using deinterleaved second extrinsic information as a priori information, and an interleaver interleaving third extrinsic information output from the variable node decoder. The check node decoder outputs fourth extrinsic information by using interleaved third extrinsic information as a priori information and the fourth extrinsic information is used as a priori information by the symbol demapper. A plurality of deinterleave/interleaver modules are provided for parallel processing.
摘要翻译：在具有解调器和执行迭代处理的解码器的接收机中，提供了一种解决方案，用于降低交织器和解交织器的实现成本并提高交织器和解交织器的吞吐量。接收机包括通过使用一个接收到的符号和先验信息来输出第一外在信息的符号解映射器，通过使用第一外在信息和先验信息输出第二外在信息的校验节点解码器，解交织器去交织第二外在信息，输出通过使用解交织的第二外在信息作为先验信息的第三外部信息，以及交织器交织从变量节点解码器输出的第三外在信息。校验节点解码器通过使用交织的第三外在信息作为先验信息输出第四外在信息，并且第四外在信息被用作符号解映射器的先验信息。提供多个解交错/交织器模块用于并行处理。

3. 发明授权

US08792595B2 Wireless communications device and method 有权
标题翻译：无线通信设备及方法
公开(公告)号：US08792595B2
公开(公告)日：2014-07-29
申请号：US13729575
申请日：2012-12-28
申请人： Hitachi Kokusai Electric Inc.
发明人： Keisuke Yamamoto , Takehiko Kobayashi , Satoru Ejima
IPC分类号： H04L27/06
CPC分类号： H04L27/02 , H04B7/0413 , H04B7/0452 , H04B7/068 , H04B7/0697 , H04B7/0854 , H04L25/0204 , H04L25/067 , H04L27/32 , H04L2025/03426
摘要： A wireless communications device and method carries out a process including estimating channel information based on a received signal; generating pseudo-transmission signal point candidates based on the channel information and/or transmission signal point candidates; and generating a replica of the received signal based on the pseudo-transmission signal point candidates and the estimated channel information. The process further includes performing matrix operations on the basis of the received signal and the replica thereof; selecting pseudo-transmission signal point candidates which have a greater effect on likelihood calculations; reverting the selected pseudo-transmission signal point candidates to original transmission signal point candidates and calculating final likelihoods; and restoring the received signal on the basis of the calculated likelihoods.
摘要翻译：无线通信装置和方法执行包括基于接收信号估计信道信息的处理; 基于所述信道信息和/或发送信号点候选生成伪发送信号点候选; 以及基于伪发送信号点候选和所估计的信道信息来生成接收信号的副本。该处理还包括基于接收到的信号及其副本执行矩阵运算; 选择对似然计算具有更大影响的伪传输信号点候选; 将所选择的伪发送信号点候选还原到原始传输信号点候选，并计算最终可能性; 并且基于所计算的似然性来恢复所接收的信号。

4. 发明授权

US10110253B2 Receiver 有权
公开(公告)号：US10110253B2
公开(公告)日：2018-10-23
申请号：US15125870
申请日：2015-03-03
申请人： Hitachi Kokusai Electric Inc.
发明人： Keisuke Yamamoto
IPC分类号： H03M13/27 , H03M13/37 , H03M13/45 , H04L1/00 , H03M13/25 , H03M13/29 , H03M13/00 , H04B7/0413
摘要： Provided is a BICM-ID technique which suppresses deterioration of decoding characteristics and reduces a calculation amount. A receiver includes a demodulator, deinterleaver, decoder, and interleaver. The demodulator outputs first extrinsic information by using a received signal encoded and interleaved and a priori information. The deinterleaver processes the first extrinsic information and outputs second extrinsic information. The decoder outputs third extrinsic information by using the second extrinsic information. The interleaver processes the third extrinsic information and outputs fourth extrinsic information. In the receiver that performs iterative decoding processing using the fourth extrinsic information as the a priori information, the demodulator includes a generator, a received signal point candidate narrowing-down unit, and a likelihood calculation unit. The generator generates a plurality of received signal point candidates. The likelihood calculation unit creates the first extrinsic information based on the narrowed-down received signal point candidates, the a priori information, and the received signal.

5. 发明授权

US10050644B2 Receiver, wireless communication system, and wireless communication method 有权
公开(公告)号：US10050644B2
公开(公告)日：2018-08-14
申请号：US15561806
申请日：2016-02-19
申请人： Hitachi Kokusai Electric Inc.
发明人： Keisuke Yamamoto , Takashi Yano
IPC分类号： H03M7/00 , H03M13/27 , H03M13/45 , H03M13/01 , H04L1/00 , H01Q1/00
摘要： A wireless communication technique in which information that has been encoded and interleaved (the sequence of bits has been rearranged) on the transmission side is subjected to iterative decoding processing by using a demodulator, a deinterleaver, a decoder, and an interleaver on the receiving side.

6. 发明授权

US09967113B2 Reception apparatus performing turbo equalizations 有权
公开(公告)号：US09967113B2
公开(公告)日：2018-05-08
申请号：US15266328
申请日：2016-09-15
申请人： Hitachi Kokusai Electric Inc.
发明人： Kei Ito , Keisuke Yamamoto , Tatsuhiro Nakada
IPC分类号： H03M13/00 , H04L25/03 , H03M13/37 , H03M13/29 , H03M13/25 , H04L1/00
CPC分类号： H04L25/03318 , H03M13/258 , H03M13/2948 , H03M13/2957 , H03M13/3746 , H03M13/6331 , H04L1/0045 , H04L1/0058
摘要： Disclosed is a reception apparatus that has solved a problem that fluctuations cannot be followed immediately after a commencement of turbo equalization in a high-speed fading environment. A reception apparatus includes a soft interference canceller, an MMSE equalizer, a likelihood calculator, a de-interleaver, an SISO decoder, an information bit hard decision unit, a subtracter, an interleaver, a soft estimation value calculator, a zero storage unit, a known signal memory unit, a transmission path estimator, and a plurality of switches. At the time of equalization, the transmission path estimator uses, as a reference signal, a known signal stored in the known signal memory unit or an output of the MMSE equalizer. Meanwhile, at the time of a first equalization, the soft interference canceller is given a ‘0’ value from the zero storage unit as a reference signal.

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