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公开(公告)号：US20060176936A1
公开(公告)日：2006-08-10
申请号：US11054290
申请日：2005-02-09
申请人： Fan Wang , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
发明人： Fan Wang , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
CPC分类号： H04L25/03159 , H04B2201/70701 , H04J13/00 , H04L1/08 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04L2025/03414 , H04L2025/03522
摘要： Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.
摘要翻译： 描述了各种实施例以提供以改进的方式发送和接收数据。 通过在发射机中包括空生成器（110）来生成输出数据符号序列来改进数据传输，该输出数据符号序列在输入数据符号序列没有的特定频率处在频域中呈现零点。 导频插入器（120）然后将导频符号序列添加到该输出数据符号序列以创建组合符号序列。 由于导频符号序列呈现与频域中的输出数据符号序列的零点相对应的导频信号，组合符号序列表现出与频域中的数据正交的导频。
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公开(公告)号：US07489755B2
公开(公告)日：2009-02-10
申请号：US11054290
申请日：2005-02-09
申请人： Fan Wang , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
发明人： Fan Wang , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
IPC分类号： H04L7/00
CPC分类号： H04L25/03159 , H04B2201/70701 , H04J13/00 , H04L1/08 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04L2025/03414 , H04L2025/03522
摘要： Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.
摘要翻译： 描述了各种实施例以提供以改进的方式发送和接收数据。 通过在发射机中包括空生成器（110）来生成输出数据符号序列来改进数据传输，该输出数据符号序列在输入数据符号序列没有的特定频率处在频域中呈现零点。 导频插入器（120）然后将导频符号序列添加到该输出数据符号序列以创建组合符号序列。 由于导频符号序列呈现与频域中的输出数据符号序列的零点相对应的导频信号，组合符号序列表现出与频域中的数据正交的导频。
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3.发明授权Transmission technique selector for radio communication systems with multiple transmit and multiple receive antennas 有权具有多个发射和多个接收天线的无线电通信系统的传输技术选择器公开(公告)号：US07477699B2
公开(公告)日：2009-01-13
申请号：US11613349
申请日：2006-12-20
申请人： Fan Wang , Lawrence A. Downing , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
发明人： Fan Wang , Lawrence A. Downing , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
CPC分类号： H04B7/0689 , H04B7/0417 , H04B7/063 , H04B7/0669 , H04B7/0697 , H04H20/22 , H04H60/11
摘要： A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.
摘要翻译： 具有多个接收天线的无线电通信设备（102）处理接收到的数据通信信号，以从具有多个发射天线的基站设备（104）中选择在空间时间编码和空间复用之间作为所选择的传输技术。 基于通过MIMO信道（140）发送的信号的信号与干扰和噪声比（502-512,55-554）来估计用于每个传输技术的信道吞吐量（402-412,450-454），如 接收器（708）。 确定具有较高估计吞吐量的传输技术。 如果确定空间复用具有较高的估计吞吐量，并且空间复用信号的每层的吞吐量大于阈值，则选择空间复用。 否则，选择空时编码。
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4.发明申请TRANSMISSION TECHNIQUE SELECTOR FOR RADIO COMMUNICATION SYSTEMS WITH MULTIPLE TRANSMIT AND MULTIPLE RECEIVE ANTENNAS 有权用于具有多个发送和多个接收天线的无线电通信系统的传输技术选择器公开(公告)号：US20080151804A1
公开(公告)日：2008-06-26
申请号：US11613349
申请日：2006-12-20
申请人： Fan Wang , Lawrence A. Downing , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
发明人： Fan Wang , Lawrence A. Downing , Amitava Ghosh , Chandrasekar Sankaran , Jun Tan
CPC分类号： H04B7/0689 , H04B7/0417 , H04B7/063 , H04B7/0669 , H04B7/0697 , H04H20/22 , H04H60/11
摘要： A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.
摘要翻译： 具有多个接收天线的无线电通信设备（102）处理接收到的数据通信信号，以从具有多个发射天线的基站设备（104）中选择在空间时间编码和空间复用之间作为所选择的传输技术。 基于通过MIMO信道（140）发送的信号的信号与干扰和噪声比（502-512,550-554）来估计用于每个传输技术的信道吞吐量（402-412,450-445），如 接收器（708）。 确定具有较高估计吞吐量的传输技术。 如果确定空间复用具有较高的估计吞吐量，并且空间复用信号的每层的吞吐量大于阈值，则选择空间复用。 否则，选择空时编码。
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公开(公告)号：US20080081671A1
公开(公告)日：2008-04-03
申请号：US11538432
申请日：2006-10-03
申请人： Fan Wang , Stanley J. Benes , Amitava Ghosh , Jun Tan
发明人： Fan Wang , Stanley J. Benes , Amitava Ghosh , Jun Tan
CPC分类号： H01Q3/30 , H01Q3/2605 , H04B7/0634 , H04B7/0636 , H04L5/14 , H04L25/0204 , H04L25/0228 , H04L25/03343 , H04L2025/03426
摘要： A subscriber unit (104) with multiple receive antennas (160, 162) and a single transmit antenna (160) derives beamforming weights to be used at a base station (102) with multiple transmitting antennas (602, 604, 606, and 608). The downlink beamforming weights are derived at the subscriber unit (104) from a prior downlink transmission from the base station (102) to the subscriber device (104) and an uplink sounding signal is used to carry derived downlink beam forming weights to the base station (102). Downlink antenna specific pilots (without weight) are used at the subscriber device (104) to determine the beamforming weights. Decimated sounding signals, where the number of sounding subcarriers is al least the same as the number of antennas at the base station (102), allow multiple users to sound at the same time.
摘要翻译： 具有多个接收天线（160,162）和单个发射天线（160）的用户单元（104）导出要在具有多个发射天线（602,604,606和608）的基站（102）处使用的波束成形权重， 。 下行链路波束形成权重在订户单元（104）处从从基站（102）到用户设备（104）的先前下行链路传输导出，并且上行链路探测信号用于将导出的下行链路波束形成权重携带到基站 （102）。 在订户设备（104）处使用下行链路天线特定导频（无权重）来确定波束成形权重。 其中发声子载波的数量与基站（102）上的天线数量至少相同的抽取的探测信号允许多个用户同时发声。
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公开(公告)号：US20070071125A1
公开(公告)日：2007-03-29
申请号：US11532545
申请日：2006-09-18
申请人： Jun Tan , Amitava Ghosh , Fan Wang
发明人： Jun Tan , Amitava Ghosh , Fan Wang
IPC分类号： H04K1/10
CPC分类号： H04L5/0048 , H04L5/0016 , H04L25/0226 , H04L25/03159 , H04L27/2613 , H04L2025/03414
摘要： Various embodiments are described to provide for the transmission of data in an improved manner. Data transmission is improved by including in a transmitter a null generator to embed frequency domain nulls into a data symbol sequence to produce a null-embedded data symbol sequence. A symbol inserter inserts a control symbol sequence into the frequency domain nulls of the null-embedded data symbol sequence to produce a combined symbol sequence. A modulator then encodes the combined symbol sequence using IFDMA/DFT-S-OFDM. This approach allows the assignment of a single IFDMA/DFT-S-OFDM code to each user for data and control (pilot, e.g.) signaling, simplifying code management. Frequency hopping techniques may also be employed to lower the pilot overhead.
摘要翻译： 描述了各种实施例以提供以改进的方式传输数据。 通过在发射机中包括空生成器来将频域空值嵌入到数据符号序列中以产生零嵌入数据符号序列来改进数据传输。 符号插入器将控制符号序列插入到零嵌入数据符号序列的频域空值中以产生组合符号序列。 然后，调制器使用IFDMA / DFT-S-OFDM对组合符号序列进行编码。 该方法允许将单个IFDMA / DFT-S-OFDM码分配给每个用户进行数据和控制（导频信号），从而简化码管理。 也可以采用跳频技术来降低导频开销。
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公开(公告)号：US07747225B2
公开(公告)日：2010-06-29
申请号：US11538432
申请日：2006-10-03
申请人： Fan Wang , Stanley J. Benes , Amitava Ghosh , Jun Tan
发明人： Fan Wang , Stanley J. Benes , Amitava Ghosh , Jun Tan
CPC分类号： H01Q3/30 , H01Q3/2605 , H04B7/0634 , H04B7/0636 , H04L5/14 , H04L25/0204 , H04L25/0228 , H04L25/03343 , H04L2025/03426
摘要： A subscriber unit (104) with multiple receive antennas (160, 162) and a single transmit antenna (160) derives beamforming weights to be used at a base station (102) with multiple transmitting antennas (602, 604, 606, and 608). The downlink beamforming weights are derived at the subscriber unit (104) from a prior downlink transmission from the base station (102) to the subscriber device (104) and an uplink sounding signal is used to carry derived downlink beam forming weights to the base station (102). Downlink antenna specific pilots (without weight) are used at the subscriber device (104) to determine the beamforming weights. Decimated sounding signals, where the number of sounding subcarriers is at least the same as the number of antennas at the base station (102), allow multiple users to sound at the same time.
摘要翻译： 具有多个接收天线（160,162）和单个发射天线（160）的用户单元（104）导出要在具有多个发射天线（602,604,606和608）的基站（102）处使用的波束成形权重， 。 下行链路波束形成权重在订户单元（104）处从从基站（102）到用户设备（104）的先前下行链路传输导出，并且上行链路探测信号用于将导出的下行链路波束形成权重携带到基站 （102）。 在订户设备（104）处使用下行链路天线特定导频（无权重）来确定波束成形权重。 抽取的探测信号，其中发声子载波的数量与基站（102）上的天线数量至少相同，允许多个用户同时发声。
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8.发明申请公开(公告)号：US20090154605A1
公开(公告)日：2009-06-18
申请号：US11954998
申请日：2007-12-12
申请人： Jun Tan , Amitava Ghosh , Fan Wang
发明人： Jun Tan , Amitava Ghosh , Fan Wang
CPC分类号： H04L25/067 , H04L25/0204 , H04L27/2647
摘要： A method, wireless device, and wireless communication system perform Maximum Likelihood Detection. At least one data signal is accepting on at least one communication channel (604). The data signal is modulated with a plurality of transmitted bit values. The at least one data signal is sampled in a characteristic function domain of the data signal to produce characteristic function samples (608). A probability density function associated with the at least one data signal is determined, based upon the characteristic function samples (610). Soft decision values are determined, based upon the probability density function, for each transmitted bit value for each dimension of the at least one data signal (612).
摘要翻译： 方法，无线设备和无线通信系统执行最大似然检测。 至少一个数据信号在至少一个通信信道上接受（604）。 数据信号用多个发送的比特值进行调制。 所述至少一个数据信号在所述数据信号的特征功能域中被采样以产生特征函数样本（608）。 基于特征函数样本（610）确定与至少一个数据信号相关联的概率密度函数。 基于所述概率密度函数，针对所述至少一个数据信号（612）的每个维度的每个发送的比特值来确定软判决值。
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公开(公告)号：US08000305B2
公开(公告)日：2011-08-16
申请号：US11621587
申请日：2007-01-10
申请人： Jun Tan , Amitava Ghosh , Rapeepat Ratasuk , Fan Wang , Weimin Xiao
发明人： Jun Tan , Amitava Ghosh , Rapeepat Ratasuk , Fan Wang , Weimin Xiao
IPC分类号： H04B7/216
CPC分类号： H04L27/2613 , H04J13/004 , H04J13/102 , H04L5/0007 , H04L5/0021 , H04L5/0048 , H04L25/0228 , H04L27/2605 , H04L27/2655
摘要： A system and method for initializing a system communication without previous reservations for random access channel (RACH) access includes a first step of defining at least one spread sequence derived from at least one constant amplitude zero autocorrelation sequence. A next step includes combining the spread sequence with a Walsh code to form an extended spread sequence. A next step includes using the extended spread sequence in a preamble for a RACH. A next step includes sending the preamble to a BTS for acquisition. A next step includes monitoring for a positive acquisition indicator from the BTS. A next step includes scheduling the sending of a RACH message. A next step includes sending the RACH message.
摘要翻译： 用于初始化系统通信而没有对随机接入信道（RACH）接入的先前保留的系统和方法包括定义从至少一个恒定幅度零自相关序列导出的至少一个扩展序列的第一步骤。 下一步包括将扩展序列与沃尔什码组合以形成扩展扩展序列。 下一步包括在RACH的前同步码中使用扩展扩展序列。 下一步包括将前导码发送到BTS进行采集。 下一步包括监测来自BTS的正采集指示符。 下一步包括调度RACH消息的发送。 下一步包括发送RACH消息。
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10.发明申请公开(公告)号：US20070165567A1
公开(公告)日：2007-07-19
申请号：US11621587
申请日：2007-01-10
申请人： Jun Tan , Amitava Ghosh , Rapeepat Ratasuk , Fan Wang , Weimin Xiao
发明人： Jun Tan , Amitava Ghosh , Rapeepat Ratasuk , Fan Wang , Weimin Xiao
IPC分类号： H04Q7/00
CPC分类号： H04L27/2613 , H04J13/004 , H04J13/102 , H04L5/0007 , H04L5/0021 , H04L5/0048 , H04L25/0228 , H04L27/2605 , H04L27/2655
摘要： A system and method for initializing a system communication without previous reservations for random access channel (RACH) access includes a first step of defining at least one spread sequence derived from at least one constant amplitude zero autocorrelation sequence. A next step includes combining the spread sequence with a Walsh code to form an extended spread sequence. A next step includes using the extended spread sequence in a preamble for a RACH. A next step includes sending the preamble to a BTS for acquisition. A next step includes monitoring for a positive acquisition indicator from the BTS. A next step includes scheduling the sending of a RACH message. A next step includes sending the RACH message.
摘要翻译： 用于初始化系统通信而没有对随机接入信道（RACH）接入的先前保留的系统和方法包括定义从至少一个恒定幅度零自相关序列导出的至少一个扩展序列的第一步骤。 下一步包括将扩展序列与沃尔什码组合以形成扩展扩展序列。 下一步包括在RACH的前同步码中使用扩展扩展序列。 下一步包括将前导码发送到BTS进行采集。 下一步包括监测来自BTS的正采集指示符。 下一步包括调度RACH消息的发送。 下一步包括发送RACH消息。
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