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1. 发明授权

US4841547A Digital communication system 失效
标题翻译：数字通讯系统
公开(公告)号：US4841547A
公开(公告)日：1989-06-20
申请号：US47319
申请日：1987-05-08
申请人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
发明人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
IPC分类号： H04L27/18 , H04L27/20 , H04L27/233
CPC分类号： H04L27/2085 , H04L27/2331
摘要： A digital communication system, in which digital information is represented by a quaternary information symbol (11, 01, 00, 10) and the double step phase shift, each step represented by (.pi./4, 3.pi./4, 5.pi./4, 7.pi./4), is performed per 1/2 time slot in correspondence to each information symbol, so that the number of phase shift per unit time in the case of the identical transmission rate can be decreased to 1/2, as compared with a .DELTA..theta./2-DSK system, and expansion of the bandwidth can be decreased to 1/2.
摘要翻译：一种数字通信系统，其中数字信息由四元信息符号（11,01,00，10）和双步相移表示，每个步骤由（pi /4,3π/4,5π/ 4 ，7 pi / 4）对应于每个信息符号每1/2个时隙执行，使得在相同传输速率的情况下，每单位时间的相移数可以减少到1/2，具有DELTAθ/ 2-DSK系统，并且带宽的扩展可以减少到1/2。

2. 发明授权

US4849990A Digital communication system 失效
标题翻译：数字通讯系统
公开(公告)号：US4849990A
公开(公告)日：1989-07-18
申请号：US30826
申请日：1987-02-04
申请人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul , Masaaki Sasada
发明人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul , Masaaki Sasada
IPC分类号： H04L1/02
CPC分类号： H04L1/02
摘要： The present invention provides two branches of a base station transmitter and a base station receiver, respectively, and inserts a delay circuit for ensuring a delay time difference between D and U waves required to obtain the best bit error rate for a DSK system, BPSK-RZ system, QPSK-RZ system or the like, into each system of the transmitter and the receiver, respectively, or into either the transmitter or the receiver of each system, thereby efficiently improving the bit error rate.
摘要翻译： PCT No.PCT / JP85 / 00513 Sec。 371日期1987年2月4日 102（e）日期1987年2月4日PCT提交1985年9月13日PCT公布。出版物WO86 / 07514 日期：1986年12月18日。本发明分别提供基站发射机和基站接收机的两个分支，并插入一个延迟电路，用于确保获得最佳误码率所需的D波和U波之间的延迟时间差用于DSK系统，BPSK-RZ系统，QPSK-RZ系统等，分别插入到发射机和接收机的每个系统中，或者进入每个系统的发射机或接收机，从而有效地提高误码率。

3. 发明授权

US4807252A Digital communication system 失效
标题翻译：数字通讯系统
公开(公告)号：US4807252A
公开(公告)日：1989-02-21
申请号：US46787
申请日：1987-05-07
申请人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
发明人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
IPC分类号： H04L27/18 , H04L27/20 , H04L27/233
CPC分类号： H04L27/2085 , H04L27/2331
摘要： The present invention provides a digital communication system in which one time slot is divided into a first half section and a second half section and the carrier phase difference .theta. between each neighboring first half section is set to either (.pi., 0) with respect to a binary information symbol (1,0) or (0, .pi./2, .pi., 3/2.pi.) with respect to a quaternary information symbol (11, 01, 00, 10). In addition, the phase difference .psi. between the first half and the second half of any time slot is a constant value .psi..sub.0 (for example, .pi.rad) irrespective of the symbol, or .psi..sub.i determined with respect to a symbol (for example, +.pi./2 with respect to a symbol 1 or -.pi./2 with respect to a symbol 0). Therefore, an arbitrary complementary characteristic can be obtained when differentially demodulated in a multipath fading channel, irrespective of the amplitude characteristic of a demodulation signal.
摘要翻译：本发明提供了一种数字通信系统，其中一个时隙被分成第一半部分和第二半部分，并且每个相邻的前半部分之间的载波相位差θ相对于一个时隙被设置为（pi，0）二进制信息符号（1,0）或（0，pi / 2，pi，3/2 pi）相对于四元信息符号（11，01，00，10）。此外，任何时隙的前半部分和后半部分之间的相位差压力值是与符号相关的常数值psi 0（例如，pi rad），或者相对于符号确定的psi i（例如， + pi / 2相对于符号1或-π/ 2相对于符号0）。因此，无论解调信号的振幅特性如何，都可以在多路径衰落信道中进行差分解调时获得任意的互补特性。

4. 发明授权

US4726038A Digital communication system 失效
标题翻译：数字通讯系统
公开(公告)号：US4726038A
公开(公告)日：1988-02-16
申请号：US768551
申请日：1985-08-22
申请人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
发明人： Fumio Ikegami , Susumu Yoshida , Tsutomu Takeuchi , Sirikiat Ariyavisitakul
IPC分类号： H04L27/20 , H04L27/233 , H04L
CPC分类号： H04L27/2331 , H04L27/2085
摘要： The present invention provides a communication system which employs a signal whose carrier phase is shifted by a constant amount .DELTA..theta. per time slot in correspondence to each symbol (1 or 0) transmitted, and the phase shift is performed by .DELTA..theta./2 (or -.DELTA..theta./2) in the first 1/2 time slot and further by .DELTA..theta./2 (or -.DELTA..theta./2) in the second 1/2 time slot thereby to improve the bit error rate in multipath propagation.
摘要翻译：本发明提供了一种通信系统，该通信系统采用一个信号，该信号的载波相位相应于每个发送的符号（1或0）的每时隙偏移一定量的ΔTATA，并且相移由DELTAθ/ 2（或 - DELTAθ/ 2），并且在第二1/2时隙中还有DELTAθ/ 2（或-ΔTATA/ 2），从而提高多径传播中的误码率。

5. 发明授权

US07933312B2 Method and system for reconfigurable SFBC/STBC in a diversity transmission system 有权
标题翻译：分集传输系统中可重构SFBC / STBC的方法和系统
公开(公告)号：US07933312B2
公开(公告)日：2011-04-26
申请号：US11769481
申请日：2007-06-27
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul
IPC分类号： H04B1/00
CPC分类号： H04B7/0617 , H04B7/0634 , H04L1/0606 , H04L1/0643 , H04L5/0023 , H04L5/006 , H04L25/0204 , H04L25/03178 , H04L25/03343 , H04L25/03866 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for reconfigurable SFBC/STBC in a diversity transmission system are presented. Exemplary aspects of the system may include one or more circuits that enable generation of a plurality of codeword sequences based on a data sequence. In a diversity transmission system, the plurality of codeword sequences may be concurrently transmitted via at least a portion of a plurality of transmitting antennas. The concurrently transmitted codeword sequences may enable a diversity receiver to generate the data sequence. In a single input single output transmission system, one or more circuits may enable transmission of one of the plurality of codeword sequences via one of the plurality of transmitting antennas. The transmitted codeword sequence may enable a receiver to generate the data sequence.
摘要翻译：提出了一种分集传输系统中可重构SFBC / STBC的方法和系统。系统的示例性方面可以包括能够基于数据序列生成多个码字序列的一个或多个电路。在分集传输系统中，多个码字序列可以经由多个发射天线的至少一部分同时发射。同时发送的码字序列可以使得分集接收机能够生成数据序列。在单输入单输出传输系统中，一个或多个电路可以经由多个发射天线之一来实现多个码字序列之一的传输。发送的码字序列可以使得接收机能够生成数据序列。

6. 发明申请

US20090268833A1 METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A 2X2 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM 失效
标题翻译：用于预测2X2多输入多输出（MIMO）无线系统中最大比特率（ML）检测的信道质量指数（CQI）值的方法和系统
公开(公告)号：US20090268833A1
公开(公告)日：2009-10-29
申请号：US12430286
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L5/12 , H04L27/06
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/24 , H04B17/336 , H04B17/373 , H04L1/0009 , H04L1/0016 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L27/2601 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value.
摘要翻译：提出了一种用于在2x2 MIMO系统中预测ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以基于所计算的信道实现，通过将计算的信道实现反向映射到相应的CQI值来计算MIMO通信系统的CQI值。基于所计算的CQI值，可以选择编码率。编码率可以从查找表中选择，其中所计算的CQI值被用作查找表的索引。反向映射可以利用使用径向基函数网络来计算的函数。在系统的另一方面，可以为MIMO通信系统计算联合互信息值。可以基于香农互信息值和匹配滤波器互信息值来计算联合互信息值。

7. 发明申请

US20090074114A1 Method and System for Approximate Maximum Likelihood (ML) Detection in a Multiple Input Multiple Output (MIMO) Receiver 审中-公开
标题翻译：在多输入多输出（MIMO）接收机中近似最大似然（ML）检测的方法和系统
公开(公告)号：US20090074114A1
公开(公告)日：2009-03-19
申请号：US12207721
申请日：2008-09-10
申请人： Eric Ojard , Sirikiat Ariyavisitakul
发明人： Eric Ojard , Sirikiat Ariyavisitakul
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L27/2647 , H04L2025/03375 , H04L2025/03426
摘要： Aspects of a method and system for approximate maximum likelihood (ML) detection in a multiple input multiple output (MIMO) receiver may comprise computing soft decision values for bits that may be decoded from a received signal vector by utilizing approximate ML detection. The soft decision values may be computed for at least a portion bits carried within a received signal vector by decomposing a candidate constellation vector into segments, with each dimension representing a spatial stream signal. After decomposition, soft decision values for at least a portion of the bits may be computed by selecting values in a search dimension and computing values in a plurality of slice dimensions. Values within the search dimension may be determined by selecting constellation points within a constellation map for the search dimension. Values within each slice dimension may be computed for each selected constellation point.
摘要翻译：在多输入多输出（MIMO）接收机中用于近似最大似然（ML）检测的方法和系统的方面可以包括通过利用近似ML检测从可以从接收信号向量解码的比特计算软判决值。可以通过将候选星座矢量分解为段来计算在接收信号向量内承载的至少一部分比特的软判决值，其中每个维度表示空间流信号。在分解之后，可以通过选择搜索维度中的值和计算多个切片维度中的值来计算至少一部分比特的软判决值。可以通过在搜索维度的星座图中选择星座点来确定搜索维度内的值。可以为每个选定的星座点计算每个切片维数内的值。

8. 发明申请

US20080233965A1 METHOD AND SYSTEM FOR ADAPTIVE ALLOCATION OF FEEDBACK RESOURCES FOR CQI AND TRANSMIT PRE-CODING 有权
标题翻译：用于CQI和发送预编码的反馈资源的自适应分配方法和系统
公开(公告)号：US20080233965A1
公开(公告)日：2008-09-25
申请号：US11864638
申请日：2007-09-28
申请人： Mark Kent , Vinko Erceg , Jun Zheng , Sirikiat Ariyavisitakul
发明人： Mark Kent , Vinko Erceg , Jun Zheng , Sirikiat Ariyavisitakul
IPC分类号： H04Q7/20
CPC分类号： H04W24/10 , H04B17/24 , H04W72/0453
摘要： Aspects of a method and system for adaptive allocation of feedback resources for CQI and transmit pre-coding may include assigning a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units. One or more feedback messages may be generated based at least on channel state information associated with the bandwidth and the feedback period assigned to the one or more CQI reporting units and with the bandwidth and the feedback period assigned to the one or more PMI reporting units. The bandwidth and the feedback period of the CQI reporting units and/or the PMI reporting units may be adjusted dynamically and/or adaptively. Based on the channel state information or as a function of a feedback rate, the bandwidth and/or the feedback period may be assigned.
摘要翻译：用于CQI的反馈资源和发送预编码的自适应分配的方法和系统的方面可以包括将带宽和反馈周期分配给一个或多个CQI报告单元以及带宽和反馈周期到一个或多个PMI报告单元。可以至少基于与分配给一个或多个CQI报告单元的带宽和反馈周期相关联的信道状态信息以及分配给一个或多个PMI报告单元的带宽和反馈周期来生成一个或多个反馈消息。可以动态地和/或自适应地调整CQI报告单元和/或PMI报告单元的带宽和反馈周期。基于信道状态信息或作为反馈速率的函数，可以分配带宽和/或反馈周期。

9. 发明授权

US08750089B2 Method and system for iterative discrete fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques 有权
标题翻译：使用最小均方误差（MMSE）技术的迭代离散傅里叶变换（DFT）信道估计的方法和系统
公开(公告)号：US08750089B2
公开(公告)日：2014-06-10
申请号：US12732975
申请日：2010-03-26
申请人： Sirikiat Ariyavisitakul , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Jun Zheng
IPC分类号： H04J11/00 , H04L25/02 , H04L25/03 , H04L1/00
CPC分类号： H04L25/0204 , H04L1/005 , H04L5/0005 , H04L25/0206 , H04L25/024 , H04L25/0242 , H04L2025/03611 , H04W24/00 , H04W84/12
摘要： A method and system for iterative discrete Fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques are presented. Aspects of the method and system include a procedure for computing channel estimates in both the time domain and frequency domain (or mixed domain) using an iterative DFT method based on MMSE techniques. One aspect of the method and system may achieve low computational complexity and produce more accurate channel estimate values in low signal to noise ratio (SNR) regimes in comparison to conventional DFT-based channel estimation methods, which utilize least squares (LS) techniques. The method and system disclosed herein may be practiced in connection with a wide range of orthogonal frequency division multiplexing (OFDM) based systems, for example wireless local area networks (WLAN, for example IEEE 802.11 WLAN systems), and LTE systems.
摘要翻译：提出了使用最小均方误差（MMSE）技术的基于迭代离散傅里叶变换（DFT）的信道估计的方法和系统。该方法和系统的方面包括使用基于MMSE技术的迭代DFT方法计算时域和频域（或混合域）中的信道估计的过程。与使用最小二乘（LS）技术的传统的基于DFT的信道估计方法相比，该方法和系统的一个方面可以实现低计算复杂度并且在低信噪比（SNR）方案中产生更准确的信道估计值。本文公开的方法和系统可以结合宽范围的基于正交频分复用（OFDM）的系统，例如无线局域网（WLAN，例如IEEE 802.11 WLAN系统）和LTE系统来实施。

10. 发明授权

US08098755B2 Method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook 有权
标题翻译：在使用码本的多用户多输入多输出（MIMO）通信系统中波束成形的方法和系统
公开(公告)号：US08098755B2
公开(公告)日：2012-01-17
申请号：US12190272
申请日：2008-08-12
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul
IPC分类号： H04B7/02
CPC分类号： H04L25/03343 , H04L1/0026 , H04L1/0618 , H04L2025/03426 , H04L2025/03802
摘要： A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (WR). The interference cancellation matrix, also referred to as a matched filter, may enable a composite signal (Y) to be represented as a plurality of subsidiary signals (yi), each of which is transmitted by the node B for reception at a corresponding ith UE station. Each of the subsidiary signals yi may be generated based on a corresponding one of a plurality of data stream signals (xi). The processor may enable generation of a precoding matrix (WT) based on the interference cancellation matrix. A transmitter within the node B may enable generation of a plurality of signals based on the preceding matrix. The signals may be transmitted via a wireless communication medium.
摘要翻译：在使用码本的多用户多输入多输出（MIMO）通信系统中的波束成形的方法和系统可以包括能够产生干扰消除矩阵（WR）的节点B中的处理器。也称为匹配滤波器的干扰消除矩阵可以使得复合信号（Y）能够被表示为多个辅助信号（yi），每个辅助信号由节点B发送以在对应的第i个UE处接收站。辅助信号yi中的每一个可以基于多个数据流信号（xi）中的对应的一个生成。处理器可以使得能够基于干扰消除矩阵生成预编码矩阵（WT）。节点B内的发射机可以使得能够基于先前的矩阵生成多个信号。信号可以经由无线通信介质发送。

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