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1. 发明申请

US20090005028A1 SUM RATE OF BROADCAST CHANNELS WITH OUTDATED 1-BIT FEEDBACK 有权
标题翻译：广泛采用1位反馈的通道频率
公开(公告)号：US20090005028A1
公开(公告)日：2009-01-01
申请号：US12111152
申请日：2008-04-28
申请人： Alexander M. Haimovich , Osvaldo Simeone , Bo Niu , Oren S. Somekh
发明人： Alexander M. Haimovich , Osvaldo Simeone , Bo Niu , Oren S. Somekh
IPC分类号： H04Q7/38
CPC分类号： H04L1/0029 , H04L1/0026
摘要： A single-input single-output (SISO) downlink channel with K users is analyzed in the presence of Rayleigh flat fading. A limited channel state information (CSI) feedback scheme is included, where only an outdated 1-bit feedback per user is available at the base station for each fading block. A closed-form expression for the achievable ergodic sum-rate of the 1-bit feedback scheme is presented for any number of users, as a function of the fading temporal correlation coefficient, the threshold of the 1-bit CSI quantizer and the SNR. The sum-rate scales with increasing number of users as log logK, which is the same scaling law achieved by the optimal non-delayed full CSI feedback scheme.
摘要翻译：在存在瑞利平坦衰落的情况下分析具有K个用户的单输入单输出（SISO）下行链路信道。包括有限的信道状态信息（CSI）反馈方案，其中每个用户在每个衰落块仅在基站处可用过时的1比特反馈。根据衰落时间相关系数，1位CSI量化器的阈值和SNR，可以为任意数量的用户提供1位反馈方案的可实现的遍历和速率的闭合表达式。总和率随着用户数量的增加而变化，如log logK，这是通过最佳非延迟全CSI反馈方案实现的相同的缩放规律。

2. 发明授权

US07386027B2 Methods and apparatus for generating and processing wideband signals having reduced discrete power spectral density components 有权
标题翻译：用于产生和处理具有降低的离散功率谱密度分量的宽带信号的方法和装置
公开(公告)号：US07386027B2
公开(公告)日：2008-06-10
申请号：US10814477
申请日：2004-03-31
申请人： Shaomin Samuel Mo , Divaydeep Sikri , Alexander D. Gelman , Alexander M. Haimovich
发明人： Shaomin Samuel Mo , Divaydeep Sikri , Alexander D. Gelman , Alexander M. Haimovich
IPC分类号： H04B1/00
CPC分类号： H04L25/03866 , H04B1/7163 , H04B1/717 , H04B1/7176 , H04J11/003 , H04J13/0022 , H04L5/0007 , H04L5/0044
摘要： Methods and apparatus for generating and processing wideband signals having reduced discrete power spectral density (PSD) components are disclosed. A wideband signal having reduced discrete PSD components is achieved by generating data symbols responsive to data for transmission, transforming one or more of the data symbols into a frame including one or more orthogonal frequency division multiplexing (OFDM) symbols, selectively inverting the frame responsive to a pseudo-random data sequence, and modulating wideband signal pulses of the wideband signal with the selectively inverted frame.
摘要翻译：公开了用于生成和处理具有降低的离散功率谱密度（PSD）分量的宽带信号的方法和装置。具有降低的离散PSD分量的宽带信号通过响应于用于传输的数据生成数据符号来实现，将数据符号中的一个或多个变换为包括一个或多个正交频分复用（OFDM）符号的帧，响应于伪随机数据序列，并且利用选择性反转的帧调制宽带信号的宽带信号脉冲。

3. 发明授权

US08112095B2 Sum rate of broadcast channels with outdated 1-bit feedback 有权
标题翻译：具有过时1位反馈的广播频道总和率
公开(公告)号：US08112095B2
公开(公告)日：2012-02-07
申请号：US12111152
申请日：2008-04-28
申请人： Alexander M. Haimovich , Osvaldo Simeone , Bo Niu , Oren S. Somekh
发明人： Alexander M. Haimovich , Osvaldo Simeone , Bo Niu , Oren S. Somekh
IPC分类号： H04W72/00
CPC分类号： H04L1/0029 , H04L1/0026
摘要： A single-input single-output (SISO) downlink channel with K users is analyzed in the presence of Rayleigh flat fading. A limited channel state information (CSI) feedback scheme is included, where only an outdated 1-bit feedback per user is available at the base station for each fading block. A closed-form expression for the achievable ergodic sum-rate of the 1-bit feedback scheme is presented for any number of users, as a function of the fading temporal correlation coefficient, the threshold of the 1-bit CSI quantizer and the SNR. The sum-rate scales with increasing number of users as log log K, which is the same scaling law achieved by the optimal non-delayed full CSI feedback scheme.
摘要翻译：在存在瑞利平坦衰落的情况下分析具有K个用户的单输入单输出（SISO）下行链路信道。包括有限的信道状态信息（CSI）反馈方案，其中每个用户在每个衰落块仅在基站处可用过时的1比特反馈。根据衰落时间相关系数，1位CSI量化器的阈值和SNR，可以为任意数量的用户提供1位反馈方案的可实现的遍历和速率的闭合表达式。总和率随着用户数量的增加而增加，作为log log K，这是通过最佳非延迟全CSI反馈方案实现的相同的缩放规律。

4. 发明授权

US07983144B2 Clipping distortion canceller for OFDM signals 有权
标题翻译：剪切OFDM信号的失真消除器
公开(公告)号：US07983144B2
公开(公告)日：2011-07-19
申请号：US11352469
申请日：2006-02-10
申请人： Hangjun Chen , Alexander M Haimovich
发明人： Hangjun Chen , Alexander M Haimovich
IPC分类号： H04J11/00
CPC分类号： H04L27/2623
摘要： Methods and apparatus are provided for reducing clipping noise from an OFDM signal, the methods and apparatus are operable to carry out actions including: (a) transforming a received orthogonal frequency division multiplexed (OFDM) signal from a transmission channel into the frequency domain, the OFDM signal having been subject to a clipping function prior to transmission in order to reduce the peak-to-average power ratio (PAPR); (b) recovering data symbols from the transformed OFDM signal, which include clipping noise; (c) estimating the clipping noise in the frequency domain based on the data symbols; and (d) subtracting the estimated clipping noise from the transformed OFDM signal.
摘要翻译：提供了用于减少来自OFDM信号的削波噪声的方法和装置，所述方法和装置可操作以执行动作，包括：（a）将接收的正交频分复用（OFDM）信号从传输信道变换到频域， OFDM信号在传输之前已经受到削波功能，以便降低峰值与平均功率比（PAPR）; （b）从经变换的OFDM信号中恢复数据符号，包括削波噪声; （c）基于数据符号估计频域中的限幅噪声; 和（d）从经变换的OFDM信号中减去估计的限幅噪声。

5. 发明授权

US07882413B2 Method and/or system for space-time encoding and/or decoding 有权
标题翻译：用于时空编码和/或解码的方法和/或系统
公开(公告)号：US07882413B2
公开(公告)日：2011-02-01
申请号：US11335957
申请日：2006-01-19
申请人： Hangjun Chen , Alexander M. Haimovich
发明人： Hangjun Chen , Alexander M. Haimovich
IPC分类号： H03M13/00
CPC分类号： H04L1/0625 , H04B7/0669 , H04L1/005 , H04L1/0066 , H04L1/0637
摘要： Time-space encoding and/or decoding may employ time variant linear transformations. Turbo coding and/or decoding may be used in conjunction with the use of time variant linear transformations. Such time variant linear transformations may be unitary in nature.
摘要翻译：时空编码和/或解码可以采用时变线性变换。 Turbo编码和/或解码可以与使用时变线性变换结合使用。这种时变线性变换本质上可以是一体的。

6. 发明授权

US07075382B2 Method and apparatus for modulating a pulse signal with a bit stream 有权
标题翻译：用位流调制脉冲信号的方法和装置
公开(公告)号：US07075382B2
公开(公告)日：2006-07-11
申请号：US10789507
申请日：2004-02-27
申请人： Joao Miguel Romano , Shaomin Samuel Mo , Alexander M. Haimovich
发明人： Joao Miguel Romano , Shaomin Samuel Mo , Alexander M. Haimovich
IPC分类号： H03K7/00
CPC分类号： H04B1/7176 , H01Q9/02 , H04B1/7172 , H04B1/7174 , H04B1/719 , H04B2001/6908
摘要： A method and apparatus for modulating a pulse signal with a bit stream is disclosed. The pulse signal is modulated by selectively inverting and delaying signal pulses within the pulse signal responsive to bits within the bit stream.
摘要翻译：公开了一种用比特流调制脉冲信号的方法和装置。脉冲信号通过响应于比特流内的比特选择性地反相和延迟脉冲信号内的信号脉冲进行调制。

7. 发明授权

US07031251B2 Clipping distortion canceller for OFDM signals 有权
公开(公告)号：US07031251B2
公开(公告)日：2006-04-18
申请号：US10771249
申请日：2004-02-03
申请人： Hangjun Chen , Alexander M. Haimovich
发明人： Hangjun Chen , Alexander M. Haimovich
IPC分类号： H04J11/00
CPC分类号： H04L27/2623
摘要： Methods and apparatus are provided for reducing clipping noise from an OFDM signal, the methods and apparatus are operable to carry out actions including: (a) transforming a received orthogonal frequency division multiplexed (OFDM) signal from a transmission channel into the frequency domain, the OFDM signal having been subject to a clipping function prior to transmission in order to reduce the peak-to-average power ratio (PAPR); (b) recovering data symbols from the transformed OFDM signal, which include clipping noise; (c) estimating the clipping noise in the frequency domain based on the data symbols; and (d) subtracting the estimated clipping noise from the transformed OFDM signal.

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