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1. 发明授权

US09755722B2 Transmission device, reception device, communication system, transmission method and reception method 有权
公开(公告)号：US09755722B2
公开(公告)日：2017-09-05
申请号：US15325580
申请日：2015-07-07
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto
IPC分类号： H04B7/02 , H04B7/06 , H04B7/08 , H04L5/00 , H04L27/26 , H04L1/06 , H04L25/03 , H04L1/00
CPC分类号： H04B7/068 , H04B7/0682 , H04B7/0865 , H04L1/0058 , H04L1/0071 , H04L1/0606 , H04L1/0643 , H04L1/0668 , H04L5/0007 , H04L25/03159 , H04L27/2617 , H04L27/2636 , H04L27/265 , Y02D70/00
摘要： In a transmission device, a coder performs SFBC block coding of a signal stream includes a divider equally dividing the stream into sub-streams of time lengths Msub and performs a cyclic shift of one or more sub-streams, a processor outputs the sub-streams and performs, on the sub-streams, time-axis inversion processing, complex conjugate processing and sign inversion processing, or the time-axis inversion processing and the complex conjugate processing, a phase rotation unit generates a repetitive signal of a time length N in which an output signal of the processor is reproduced and arranged, and giving phase rotation to the repetitive signal, and a multiplexer generates, for each transmission antenna, a signal transmitted from the antenna, by multiplexing the repetitive signals given the phase rotation, and the unit gives different phase rotations to repetitive signals multiplexed to an identical transmission signal.

2. 发明授权

US09525578B2 Method of reducing peak-to-average power ratio, cubic metric and block error rate in OFDM systems using network coding 有权
标题翻译：在使用网络编码的OFDM系统中降低峰均功率比，立方度量和块误码率的方法
公开(公告)号：US09525578B2
公开(公告)日：2016-12-20
申请号：US13642423
申请日：2011-04-21
申请人： Yongho Kim , Amin Alamdar Yazdi , Sameh Sorour , Shahrokh Valaee
发明人： Yongho Kim , Amin Alamdar Yazdi , Sameh Sorour , Shahrokh Valaee
IPC分类号： H04L27/26 , H03M13/37 , H03M13/00 , H04L1/00 , H03M13/05 , H03M13/09
CPC分类号： H04L27/2617 , H03M13/05 , H03M13/09 , H03M13/3761 , H03M13/6362 , H03M13/6525 , H03M13/6527 , H03M13/6541 , H03M13/6544 , H04L1/0041 , H04L1/0068
摘要： Disclosed in a novel scheme to jointly reduce and trade-off Peak-to-Average Power Ratio (PAPR) and a Block Error Rate (BLER) using random network coding. To do this, the different representations of the input information block are generated using a special form of network coding matrices. Further, the encoded block puncturing is utilized to improve in the PAPR against a degradation in the BLER.
摘要翻译：公开了一种使用随机网络编码来共同降低和平衡峰均功率比（PAPR）和块错误率（BLER）的新方案。为此，使用特殊形式的网络编码矩阵来生成输入信息块的不同表示。此外，利用编码的块穿孔来改善PAPR中的BLER的劣化。

3. 发明申请

US20160119073A1 System and Method for Low Peak to Average Power Ratio Multiple Access Communications 有权
标题翻译：低峰值与平均功率比多址通信的系统和方法
公开(公告)号：US20160119073A1
公开(公告)日：2016-04-28
申请号：US14521387
申请日：2014-10-22
申请人： Huawei Technologies Co., Ltd.
发明人： Usa Vilaipornsawai , Jianglei Ma , Hosein Nikopour
IPC分类号： H04J13/10 , H04L27/26
CPC分类号： H04L27/2617 , H04J13/10 , H04W4/70
摘要： A method for generating a virtual codebook of low peak to average power ratio (PAPR) sequences includes generating a plurality of low PAPR combination block sequences, with each low PAPR combination block sequence including at least one of a plurality of sparse codebook, and applying time domain hopping to the plurality of low PAPR combination block sequences, thereby producing a virtual codebook. The method also includes storing the virtual codebook.
摘要翻译：一种用于生成低峰值与平均功率比（PAPR）序列的虚拟码本的方法包括：生成多个低PAPR组合块序列，其中每个低PAPR组合块序列包括多个稀疏码本中的至少一个，并且施加时间跳频到多个低PAPR组合块序列，由此产生虚拟码本。该方法还包括存储虚拟码本。

4. 发明申请

US20110182170A1 Digital Modulation System Using Modified Orthogonal Codes To Reduce Autocorrelation 有权
标题翻译：使用改进的正交码的数字调制系统来减少自相关
公开(公告)号：US20110182170A1
公开(公告)日：2011-07-28
申请号：US13080018
申请日：2011-04-05
申请人： D. J. Richard van Nee
发明人： D. J. Richard van Nee
IPC分类号： H04J11/00
CPC分类号： H04L23/02 , H04J13/10 , H04L27/2602 , H04L27/2617 , H04L27/2621
摘要： A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes.
摘要翻译：数字调制系统通过使用具有减小的自相关旁瓣的修正的正交码来提供增强的多径性能，同时保持经修改的代码的互相关性质。例如，修正的正交码可以减小自相关电平，使其不超过修正正交码长度的一半。在某些实施例中，使用M进制正交密钥（MOK）系统，其使用互补码修改正交沃尔什码，以改善沃尔什码的自相关属性，从而在保持正交性的同时增强MOK系统的多径性能和沃尔什码的低互相关特性。

5. 发明授权

US07957256B2 M-ary orthogonal keying system 有权
标题翻译： M型正交键控系统
公开(公告)号：US07957256B2
公开(公告)日：2011-06-07
申请号：US12508785
申请日：2009-07-24
申请人： D. J. Richard van Nee
发明人： D. J. Richard van Nee
IPC分类号： H04J11/00
CPC分类号： H04L23/02 , H04J13/10 , H04L27/2602 , H04L27/2617 , H04L27/2621
摘要： A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes.
摘要翻译：数字调制系统通过使用具有减小的自相关旁瓣的修正的正交码来提供增强的多径性能，同时保持经修改的代码的互相关性质。例如，修正的正交码可以减小自相关电平，使其不超过修正正交码长度的一半。在某些实施例中，使用M进制正交密钥（MOK）系统，其使用互补码修改正交沃尔什码，以改善沃尔什码的自相关属性，从而在保持正交性的同时增强MOK系统的多径性能和沃尔什码的低互相关特性。

6. 发明申请

US20110129029A1 METHOD FOR TRANSMIT DIVERSITY ENCODING 有权
标题翻译：发送多样性编码的方法
公开(公告)号：US20110129029A1
公开(公告)日：2011-06-02
申请号：US13021477
申请日：2011-02-04
申请人： Jianghua Liu , Branislav Popovic
发明人： Jianghua Liu , Branislav Popovic
IPC分类号： H04B7/02
CPC分类号： H04L5/0044 , H04B7/0669 , H04L1/0606 , H04L1/0668 , H04L5/0023 , H04L27/2617 , H04L27/2636 , H04L27/2684
摘要： Transmit diversity coding of symbols employing four antennas is disclosed. An example embodiment of the invention comprises providing blocks of symbols to four transmit antennas, the blocks of symbols being determined by transforming input blocks and extending the blocks by adding zeroes in groups before or after groups of elements in the blocks.
摘要翻译：公开了使用四个天线的符号的发射分集编码。本发明的示例性实施例包括向四个发送天线提供符号块，通过变换输入块来确定符号块，并通过在块中的元素组之前或之后的组中添加零来扩展块。

7. 发明授权

US07660360B2 Peak-to-average power ratio reduction with threshold limited selection for coded OFDM systems 有权
标题翻译：峰值与平均功率比降低与编码OFDM系统的阈值限制选择
公开(公告)号：US07660360B2
公开(公告)日：2010-02-09
申请号：US11536263
申请日：2006-09-28
申请人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
发明人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2618 , H04L1/0043 , H04L1/0057 , H04L1/0066 , H04L27/2617
摘要： Disclosed is a coded orthogonal frequency-division multiplexing (OFDM) system and method for reducing a peak-to-average power ratio (PAPR). The system and method include a modulator configured to modulate (e.g., using quadrature amplitude modulation (QAM)) coded bits into symbols. The system and method also include an inverse discrete fourier transform (IDFT) module to perform an IDFT on the symbols to produce an OFDM signal. The system and method measure the PAPR of the OFDM signal and transmit the signal to a receiver if the PAPR of the signal is less than a threshold PAPR.
摘要翻译：公开了用于降低峰均功率比（PAPR）的编码正交频分复用（OFDM）系统和方法。该系统和方法包括配置成将（例如，使用正交幅度调制（QAM））编码比特调制成符号的调制器。该系统和方法还包括对码元执行IDFT以产生OFDM信号的反离散傅里叶变换（IDFT）模块。如果信号的PAPR小于阈值PAPR，则该系统和方法测量OFDM信号的PAPR并将该信号发送到接收机。

8. 发明申请

US20090290481A1 M-ary Orthogonal Keying System 有权
标题翻译： M-ary正交键控系统
公开(公告)号：US20090290481A1
公开(公告)日：2009-11-26
申请号：US12508785
申请日：2009-07-24
申请人： D.J. Richard van Nee
发明人： D.J. Richard van Nee
IPC分类号： H04J11/00
CPC分类号： H04L23/02 , H04J13/10 , H04L27/2602 , H04L27/2617 , H04L27/2621
摘要： A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes.
摘要翻译：数字调制系统通过使用具有减小的自相关旁瓣的修正的正交码来提供增强的多径性能，同时保持经修改的代码的互相关性质。例如，修正的正交码可以减小自相关电平，使其不超过修正正交码长度的一半。在某些实施例中，使用M进制正交密钥（MOK）系统，其使用互补码修改正交沃尔什码，以改善沃尔什码的自相关属性，从而在保持正交性的同时增强MOK系统的多径性能和沃尔什码的低互相关特性。

9. 发明申请

US20090190685A1 MIMO COMMUNICATION SYSTEM AND TRANSMISSION STATION 有权
标题翻译： MIMO通信系统和传输站
公开(公告)号：US20090190685A1
公开(公告)日：2009-07-30
申请号：US12273124
申请日：2008-11-18
申请人： Dai KIMURA
发明人： Dai KIMURA
IPC分类号： H04L1/02 , H04L27/00
CPC分类号： H04L27/2617 , H04B7/0404 , H04B7/0417 , H04B7/0426 , H04B7/0634 , H04B7/0639 , H04B7/0665 , H04L5/0044 , H04L5/0048 , H04L25/03343 , H04L27/262 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： An imbalanced amplitude is produced to a pair of weighing factors (U1,1 and U1,2, U2,1 and U2,2) with respect to the transmission streams multiplexed to any of the plurality of transmission antennas. Thus, the increase in PAPR in a preceding MIMO system can be prevented.
摘要翻译：相对于复用到多个发送天线中的任何一个的发送流，产生对一对加权因子（U1,1和U1,2，U2,1和U2,2）的不平衡振幅。因此，可以防止前面的MIMO系统中的PAPR的增加。

10. 发明授权

US07321629B2 Method and apparatus for protecting and transmitting the side information related to peak-to-average power ratio reduction in a multicarrier system 有权
标题翻译：用于保护和传输与多载波系统中的峰均功率比降低有关的侧信息的方法和装置
公开(公告)号：US07321629B2
公开(公告)日：2008-01-22
申请号：US10613419
申请日：2003-07-03
申请人： Chih-Chun Feng , Yung-Hua Hung , Chih-Yaw Wang , Chun-Yu Lin
发明人： Chih-Chun Feng , Yung-Hua Hung , Chih-Yaw Wang , Chun-Yu Lin
IPC分类号： H04K1/10 , H04L27/08
CPC分类号： H04L1/0041 , H04L27/2617 , H04L27/2618 , H04L27/2621 , H04L27/2623
摘要： A low-complexity and low-latency method and apparatus in multicarrier communication systems is used for protection and transmission of the side information related to peak-to-average power ratio (PAPR) reduction. The side information is encoded by an error-correction code and transmitted through a plurality of reserved sub-carriers. Modulation of the coded side information over the reserved sub-carriers is performed separately without re-performing data modulation. Therefore, the invention dramatically reduces implementation complexity. Determination of the related parameters for PAPR reduction can be based on the PAPR level of the data modulated signal with slight degradation in PAPR reduction performance or that of level of the transmitted signal with no degradation in PAPR reduction performance.
摘要翻译：多载波通信系统中的低复杂度和低延迟的方法和装置用于与峰均功率比（PAPR）降低相关的辅助信息的保护和传输。侧信息由纠错码编码并通过多个保留子载波进行发送。在保留副载波上的编码侧信息的调制是分开执行的，而不执行数据调制。因此，本发明大大降低了实现的复杂性。减少PAPR的相关参数的确定可以基于PAPR降低性能稍微降低的数据调制信号的PAPR电平或PAPR降低性能下降的传输信号的电平。

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