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31. 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。

32. 发明授权

US08442142B2 Method and system for beamforming signal transmission under a per-antenna power constraint 有权
标题翻译：在每个天线功率约束下波束成形信号传输的方法和系统
公开(公告)号：US08442142B2
公开(公告)日：2013-05-14
申请号：US12761567
申请日：2010-04-16
申请人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
发明人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
IPC分类号： H01Q3/00 , G01S1/00
CPC分类号： H01Q25/00
摘要： A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna.
摘要翻译：提出了一种在每个天线功率约束下波束成形信号传输的方法和系统。在一个方面，多输入多输出（MIMO）发射站可以为多个发射链信号中的每一个计算每天线功率增益因子。发射链信号可以在MIMO发射台处由多个发射天线同时发射。多个发射链信号可以对应于通过在多个时空信号上执行空间映射而生成的波束形成信号。可以基于每天线功率约束来计算多个功率增益因子。或者，可以基于联合每天线功率和总功率约束来计算多个功率增益因子。每个发射链信号可以基于相应的天线增益因子被放大或衰减。放大或衰减的信号然后由相应的发射天线发射。

33. 发明授权

US08412275B2 Method and system for communicating feedback information in a multiple user multiple input multiple output (MU-MIMO) communication system 有权
公开(公告)号：US08412275B2
公开(公告)日：2013-04-02
申请号：US12720937
申请日：2010-03-10
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul
IPC分类号： H04M1/00 , H04B17/00
CPC分类号： H04L5/023 , H04B7/0413 , H04B7/0417 , H04B7/0452 , H04B7/0626
摘要： A method and system for communicating feedback information in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system, a beamformer station may communicate a feedback information request to a plurality of beamformee stations. The feedback information request may request feedback data for a plurality of RF channel bands. The RF channel bands may form a multichannel. The beamformer may subsequently transmit a plurality of signals utilizing the RF channel bands within the multichannel. Each of the beamformees may receive the plurality of subsequently transmitted signals. A beamformee may generate the requested feedback data for each RF channel band within the multichannel. The beamformee may generate a beamforming report, which comprises the feedback data, which is generated across the plurality of RF channel bands in the multichannel. The beamformee may transmit the beamforming report to the beamformer.

34. 发明授权

US08306142B2 Method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers 有权
标题翻译：用于发射机波束成形的方法和系统，用于降低复杂度的多输入多输出（MIMO）收发器
公开(公告)号：US08306142B2
公开(公告)日：2012-11-06
申请号：US12724134
申请日：2010-03-15
申请人： Sirikiat Ariyavisitakul
发明人： Sirikiat Ariyavisitakul
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0617
摘要： Aspects of a method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers are presented. Aspects of the system may include a MIMO transmitter that computes a channel estimate matrix and decomposes the computed channel estimate matrix based on singular value decomposition (SVD). Singular values in a singular value matrix may be rearranged and grouped to generate a plurality of submatrices. In one aspect, each of the submatrices may be decomposed based on GMD at a MIMO transmitter, while a MIMO receiver may utilize a vertical layered space time (VLST) method. In another aspect, the MIMO transmitter may utilize Givens rotation matrices corresponding to each of the submatrices, while the MIMO receiver may utilize maximum likelihood (ML) detection.
摘要翻译：提出了用于降低复杂度的多输入多输出（MIMO）收发器的用于发射机波束成形的方法和系统的方面。系统的方面可以包括MIMO发射机，其计算信道估计矩阵并且基于奇异值分解（SVD）来分解所计算的信道估计矩阵。奇异值矩阵中的奇异值可以被重新排列并分组以产生多个子矩阵。在一个方面，每个子矩阵可以在MIMO发射机处基于GMD分解，而MIMO接收机可以利用垂直分层空间时间（VLST）方法。在另一方面，MIMO发射机可以利用与每个子矩阵相对应的Givens旋转矩阵，而MIMO接收机可以利用最大似然（ML）检测。

35. 发明申请

US20110159866A1 METHOD AND SYSTEM FOR COMMUNICATING FEEDBACK INFORMATION IN A MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEM 有权
标题翻译：用于在多用户多输入多输出（MU-MIMO）通信系统中通信反馈信息的方法和系统
公开(公告)号：US20110159866A1
公开(公告)日：2011-06-30
申请号：US12720937
申请日：2010-03-10
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul
IPC分类号： H04W40/00 , H04L27/28
CPC分类号： H04L5/023 , H04B7/0413 , H04B7/0417 , H04B7/0452 , H04B7/0626
摘要： A method and system for communicating feedback information in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system, a beamformer station may communicate a feedback information request to a plurality of beamformee stations. The feedback information request may request feedback data for a plurality of RF channel bands. The RF channel bands may form a multichannel. The beamformer may subsequently transmit a plurality of signals utilizing the RF channel bands within the multichannel. Each of the beamformees may receive the plurality of subsequently transmitted signals. A beamformee may generate the requested feedback data for each RF channel band within the multichannel. The beamformee may generate a beamforming report, which comprises the feedback data, which is generated across the plurality of RF channel bands in the multichannel. The beamformee may transmit the beamforming report to the beamformer.
摘要翻译：提出了一种用于在多用户多输入多输出（MU-MIMO）通信系统中传送反馈信息的方法和系统。在该方法和系统的一个方面，波束形成器站可将反馈信息请求传送到多个波束形成站。反馈信息请求可以请求多个RF信道频带的反馈数据。 RF信道频带可以形成多信道。波束形成器随后可以利用多声道内的RF信道频带发送多个信号。每个波束形成器可以接收多个随后发送的信号。波束形成器可以为多通道内的每个RF信道频带生成所请求的反馈数据。波束形成器可以生成波束形成报告，其包括在多声道中跨多个RF信道频带产生的反馈数据。波束形成器可以将波束形成报告发送到波束形成器。

36. 发明申请

US20080317178A1 METHOD AND SYSTEM FOR SFBC/STBC USING INTERFERENCE CANCELLATION 审中-公开
标题翻译： SFBC / STBC使用干扰消除的方法和系统
公开(公告)号：US20080317178A1
公开(公告)日：2008-12-25
申请号：US11874566
申请日：2007-10-18
申请人： Joonsuk Kim , Nambirajan Seshadri , Sirikiat Ariyavisitakul
发明人： Joonsuk Kim , Nambirajan Seshadri , Sirikiat Ariyavisitakul
IPC分类号： H04L1/02 , H04B7/10 , H04L1/00
CPC分类号： H04B7/0669 , H04B7/068 , H04B7/0854 , H04L1/0631 , H04L25/0224
摘要： Aspects of a method and system for SFBC and/or STBC using interference cancellation are presented. Aspects of an exemplary system may enable rate 5 4 coding in diversity communication systems that utilize SFBC and/or STBC. A transmitting station may utilize SFBC or STBC to generate and/or concurrently transmit a plurality of signals symbols, which are encoded to enable rate 5 4 transmission. A receiving station may decode rate 5 4 encoded signals utilizing various methods to achieve interference cancellation. The interference cancellation may cancel at least a portion of intersymbol interference, which may occur among symbols in the received rate 5 4 encoded signals. Various methods may be utilized to compute estimated values for at least a portion of the symbols. These methods may include the class of linear estimation methods, such as minimum mean squared error (MMSE) estimation.
摘要翻译：提出了使用干扰消除的SFBC和/或STBC的方法和系统的方面。示例性系统的方面可以实现速率 $5使用SFBC和/或STBC的分集通信系统中的mn>编码。发送站可以利用SFBC或STBC生成和/或同时发送多个信号符号，这些符号被编码以使得能够使用率54传输。接收站可以解码速率54使用各种方法实现干扰消除的编码信号。干扰消除可以消除在接收速率中的符号之间可能出现的符号间干扰的至少一部分\frac{编码信号}{54可以使用各种方法来计算至少一部分符号的估计值。这些方法可以包括诸如最小均方误差（MMSE）估计之类的线性估计方法。}$

37. 发明申请

US20080311873A1 METHOD AND SYSTEM FOR SFBC/STBC IN A COMMUNICATION DIVERSITY SYSTEM USING ANGLE FEEDBACK 失效
标题翻译：在使用角度反馈的通信多样性系统中的SFBC / STBC的方法和系统
公开(公告)号：US20080311873A1
公开(公告)日：2008-12-18
申请号：US11864611
申请日：2007-09-28
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul , Nambirajan Seshadri
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul , Nambirajan Seshadri
IPC分类号： H04B1/06
CPC分类号： H04B7/0634 , H04B7/0669 , H04B7/068 , H04B7/0891 , H04L1/0003 , H04L1/04 , H04L1/0675 , H04L5/0007 , H04L5/0053 , H04L25/0224
摘要： Aspects of a system for STBC/SFBC in a communication system using angle feedback may include a receiver, which enables reception of signals via a plurality of receiving antennas. The receiver may enable computation of a rotation factor value based on the received signals and utilization of the computed rotation factor value to receive subsequent signals via the plurality of receiving antennas. The received signals may comprise preamble data. The receiver may enable computation of channel estimate values based on the received preamble data. A rotation angle value may be computed based on the computed channel estimate values. The rotation factor value may be computed based on the computed rotation angle value. The receiver may enable transmission of feedback information comprising the computed rotation factor and/or the computed rotation angle.
摘要翻译：在使用角度反馈的通信系统中用于STBC / SFBC的系统的方面可以包括能够经由多个接收天线接收信号的接收机。接收机可以使得能够基于所接收的信号来计算旋转因子值，并且利用所计算的旋转因子值以经由多个接收天线接收后续信号。所接收的信号可以包括前导码数据。接收机可以使得能够基于所接收的前导码数据来计算信道估计值。可以基于所计算的信道估计值来计算旋转角度值。可以基于计算的旋转角度值来计算旋转因子值。接收机可以实现包括所计算的旋转因子和/或所计算的旋转角度的反馈信息的传输。

38. 发明授权

US5946351A Tap selectable decision feedback equalizer 失效
标题翻译：点击可选决策反馈均衡器
公开(公告)号：US5946351A
公开(公告)日：1999-08-31
申请号：US777335
申请日：1996-12-27
申请人： Sirikiat Ariyavisitakul , Nelson Ray Sollenberger
发明人： Sirikiat Ariyavisitakul , Nelson Ray Sollenberger
IPC分类号： H04L7/04 , H04L25/03 , H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H04L25/03057 , H04L7/04
摘要： A decision feedback equalizer receiver that assigns a number F of feedforward filter taps and optimizes digital receiver performance in multipath channel environments, where F is an integer less than a memory length of a radio channel. The feedforward filter taps are assigned to delay times corresponding to an optimum burst timing parameter delay time, d(0), and to F-1 time delays based on "tap SNR indices." For an Uncorrelated Inter-Symbol-Interference (UISI) case, the F-1 time delays are the first F-1 rank ordered time delays are selected as the feedforward tap delay times. For a general case, a combination of the UISI case and an analytical two cluster case is obtained by selecting the first F-2 rank ordered time delays and a 2D time delay, where D is the delay time corresponding to the largest estimated tap SNR index.
摘要翻译：分配前馈滤波器抽头数量F的判决反馈均衡器接收器，并且在多径信道环境中优化数字接收器性能，其中F是小于无线电信道的存储器长度的整数。前馈滤波器抽头被分配给对应于最佳突发定时参数延迟时间d（0）的延迟时间，并分配给基于“抽头SNR指数”的F-1时间延迟。对于不相关的符号间干扰（UISI）情况，F-1时间延迟是第一个F-1等级有序时间延迟作为前馈抽头延迟时间。对于一般情况，通过选择第一F-2秩有序时间延迟和2D时间延迟来获得UISI情况和分析两个群集情况的组合，其中D是对应于最大估计抽头SNR指数的延迟时间。

39. 发明授权

US5155742A Time dispersion equalizer receiver with a time-reversal structure for TDMA portable radio systems 失效
标题翻译：具有TDMA便携式无线电系统的时间反转结构的时间分散均衡器接收机
公开(公告)号：US5155742A
公开(公告)日：1992-10-13
申请号：US695460
申请日：1991-05-03
申请人： Sirikiat Ariyavisitakul , Hamilton W. Arnold
发明人： Sirikiat Ariyavisitakul , Hamilton W. Arnold
IPC分类号： H04B7/26 , H04L25/03
CPC分类号： H04B7/2643 , H04L25/03019 , H04L25/03063
摘要： A receiver for use in the port or portable units in a TDM/TDMA digital radio communications system is disclosed which incorporates an equalizer (107) to compensate for channel distortion due to multipath delay spread. Each received burst of information is oversampled at a multiple of the symbol rate and stored in a buffer memory (105). A joint estimator (106) processes the stored burst by operating on a known training sequence of bits within the burst to determine burst timing (where the burst actually begins) and the symbol timing (the optimum sample per oversampled symbol to be used for detection purposes). The estimator also determines whether the stored burst should be processed in a time-forward or time-reversed order. The joint estimator includes plural training equalizers (201), each of which is associated with an assumed burst location and each of which attempts to converge on the known training sequence as the stored sequence is circulated plural times through the equalizers in both the time-forward and the time-reversed order. Burst and symbol timing and the optimum processing order are determined from the location of the training equalizer which converges with the minimum mean-square error. The determined burst and symbol timing, and the selected processing order, are passed to the buffer storage for read-out, in that selected direction, of the stored burst information to the input of the main receiver equalizer (107). The main and training equalizers can be either conventional fractionally-spaced decision feedback equalizers or phase equalizers, which operate on the received phase angle.
摘要翻译：公开了一种用于TDM / TDMA数字无线电通信系统中的端口或便携式单元的接收机，其包括均衡器（107）以补偿由于多径延迟扩展引起的信道失真。每个接收的信息突发以符号率的倍数过采样并存储在缓冲存储器（105）中。联合估计器（106）通过对脉冲串内的已知训练序列的比特进行操作来处理所存储的脉冲串，以确定脉冲串定时（脉冲串实际开始的地点）和符号定时（用于检测目的的每个过采样符号的最佳采样）。估计器还确定是否应以时间或时间顺序处理所存储的脉冲串。联合估计器包括多个训练均衡器（201），每个训练均衡器（201）与假定的突发位置相关联，并且当所存储的序列在时间前进中通过均衡器多次循环时，每个训练均衡器试图收敛于已知的训练序列和时间相反的顺序。从最小均方误差收敛的训练均衡器的位置确定突发和符号定时以及最佳处理顺序。将所确定的突发和符号定时以及所选择的处理顺序传送到缓冲存储器，以将所存储的突发信息的选择方向读出到主接收机均衡器（107）的输入端。主和训练均衡器可以是传统的分数间隔的判决反馈均衡器或相位均衡器，其对接收的相位角进行操作。

40. 发明授权

US5084891A Technique for jointly performing bit synchronization and error detection in a TDM/TDMA system 失效
标题翻译：在TDM / TDMA系统中共同执行比特同步和错误检测的技术
公开(公告)号：US5084891A
公开(公告)日：1992-01-28
申请号：US404946
申请日：1989-09-08
申请人： Sirikiat Ariyavisitakul , Li F. Chang , Nelson R. Sollenberger
发明人： Sirikiat Ariyavisitakul , Li F. Chang , Nelson R. Sollenberger
IPC分类号： H03M13/33 , H04B7/26 , H04L1/00 , H04L7/04 , H04W88/08
CPC分类号： H04L7/048 , H03M13/33 , H04B7/2643 , H04L1/0059 , H04W88/08
摘要： A technique for bit synchronization and error detection of received digital data bursts in a TDM/TDMA system, such as that which will be used with low power portable digital telephony. A cyclically redundant codeword, e.g. a (161,147) codeword, is formed for transmission, using e.g. either a TDM packet or TDMA burst. The first and last bits in the codeword are then inverted to form a first set of marker bits. At a receiver, a second set of marker bits is inserted into a received word, again through inverting the first and last bits. The resulting marked word is then rotated by a pre-determined number of bits to place potentially erroneous bits at the end of this word. A multi-bit timing syndrome value is then determined and is used to access a look-up table for a value of bit slippage. The received word is advanced or retarded as specified by the bit slippage value to yield an intermediate word. The marker bits are removed from the intermediate word to yield an unmarked word for which an error syndrome value is determined. If the error syndrome value is zero, then the unmarked word is a synchronized substantially error-free codeword. If the unmarked word contains excessive bit slippage or bit errors indicated by an excessive value of the timing syndrome or a non-zero valued error syndrome, an indication is provided to ignore this word.
摘要翻译：用于TDM / TDMA系统中接收的数字数据脉冲串的比特同步和错误检测的技术，例如将与低功率便携式数字电话一起使用的技术。循环冗余码字，例如。一个（161,147）码字被形成用于传输，使用例如 TDM分组或TDMA突发。码字中的第一和最后一位然后被反转以形成第一组标记位。在接收机处，通过反转第一位和最后位，再次将第二组标记位插入接收到的字中。然后将得到的标记字旋转预定数量的位，以将潜在的错误位置于该字的末尾。然后确定多位定时综合征值，并且用于访问查询表中的位打滑值。接收到的字是由位滑移值指定的高级或延迟，以产生一个中间字。标记位从中间字移除以产生确定错误校正值的未标记字。如果错误校正值为零，则未标记的字是同步的基本上无错误的码字。如果未标记的字包含由定时综合征的过大值或非零值错误综合征指示的过多的位滑动或位错误，则提供忽略该字的指示。

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