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1. 发明授权

US08477592B2 Interference and noise estimation in an OFDM system 有权
标题翻译： OFDM系统中的干扰和噪声估计
公开(公告)号：US08477592B2
公开(公告)日：2013-07-02
申请号：US10809538
申请日：2004-03-24
申请人： Arak Sutivong , Ayman Fawzy Naguib , Avneesh Agrawal
发明人： Arak Sutivong , Ayman Fawzy Naguib , Avneesh Agrawal
IPC分类号： H04J11/00
CPC分类号： H04L1/20 , H04L27/2647
摘要： Noise and interference can be independently measured in a multiple user Orthogonal Frequency Division Multiplexing (OFDM) system. Co-channel interference is measured in a frequency hopping, multiple user, OFDM system by tracking the sub-carriers assigned to all users in a particular service area or cell. The composite noise plus interference can be determined by measuring the amount of received power in a sub-carrier whenever it is not assigned to any user in the cell. A value is stored for each sub-carrier in the system and the value of noise plus interference can be a weighted average of the present value with previously stored values. The noise component can be independently determined in a synchronous system. In the synchronous system, all users in a system may periodically be prohibited from broadcasting over a sub-carrier and the received power in the sub-carrier measured during the period having no broadcasts.
摘要翻译：噪声和干扰可以在多用户正交频分复用（OFDM）系统中独立测量。通过跟踪分配给特定服务区域或小区中的所有用户的子载波，在跳频，多用户OFDM系统中测量同信道干扰。复合噪声加干扰可以通过在子载波中没有分配给小区中的任何用户时测量子载波中的接收功率的量来确定。为系统中的每个子载波存储一个值，并且噪声加干扰的值可以是具有先前存储的值的当前值的加权平均值。噪声分量可以在同步系统中独立确定。在同步系统中，系统中的所有用户可以周期地禁止通过子载波进行广播，并且在没有广播的时段期间测量的子载波中的接收功率。

2. 发明授权

US07012912B2 Power control and scheduling in an OFDM system 有权
标题翻译： OFDM系统中的功率控制和调度
公开(公告)号：US07012912B2
公开(公告)日：2006-03-14
申请号：US10809605
申请日：2004-03-24
申请人： Ayman Fawzy Naguib , Avneesh Agrawal , Arak Sutivong
发明人： Ayman Fawzy Naguib , Avneesh Agrawal , Arak Sutivong
IPC分类号： H04J1/00
CPC分类号： H04W52/24 , H04L5/0007 , H04L5/0044 , H04L5/0058 , H04L5/006
摘要： A system and method for power control and scheduling of sub-carriers in an OFDM communication system. The receiver dynamic range can be minimized by a power control loop that attempts to maintain received power over a noise floor in a predetermined range. If the received power relative to a noise floor in allocated sub-carriers exceeds the predetermined range and the total received power is at the minimum, the scheduling system allocates an additional sub-carrier to the communication link. Additionally, if the received power relative to the noise floor is less than the predetermined range minimum, and the total received power is at a maximum, the scheduling system de-allocates a sub-carrier from the communication link. The scheduling system may also adjust an encoding rate to maintain a relatively constant symbol rate in each sub-carrier.
摘要翻译：一种用于OFDM通信系统中的子载波的功率控制和调度的系统和方法。可以通过功率控制环路来最小化接收器动态范围，该功率控制环路尝试在预定范围内的噪声基底上保持接收功率。如果所分配的子载波中相对于本底噪声的接收功率超过预定范围并且总接收功率处于最小，则调度系统向通信链路分配附加子载波。此外，如果相对于本底噪声的接收功率小于预定范围最小值，并且总接收功率处于最大值，则调度系统从通信链路去分配子载波。调度系统还可以调整编码速率以在每个子载波中维持相对恒定的符号率。

3. 发明授权

US09520972B2 Pilot signal transmission for an orthogonal frequency division wireless communication system 有权
公开(公告)号：US09520972B2
公开(公告)日：2016-12-13
申请号：US11083708
申请日：2005-03-17
申请人： Alexei Gorokhov , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Ashok Gore , Tingfang Ji
发明人： Alexei Gorokhov , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Ashok Gore , Tingfang Ji
IPC分类号： H04K1/10 , H04L27/28 , H04L5/00
CPC分类号： H04L5/0048 , H04L5/0023
摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and/or biasing from different mobile stations over the same frequencies and in the same time slots.

4. 发明授权

US08441969B2 Low complexity beamforming for multiple antenna systems 失效
标题翻译：用于多天线系统的低复杂度波束成形
公开(公告)号：US08441969B2
公开(公告)日：2013-05-14
申请号：US12878503
申请日：2010-09-09
申请人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
发明人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
IPC分类号： H04B7/00 , H03C7/02 , H04L27/00
CPC分类号： H01Q3/26 , H04B1/713 , H04B7/0617 , H04B7/0626 , H04L27/2626
摘要： Methods and apparatuses are disclosed that utilize the discrete Fourier transform of time domain responses to generate beamforming weights for wireless communication. In addition, in some embodiments frequency subcarriers constituting less than all of the frequency subcarriers allocated for communication to a user may utilized for generating the beamforming weights.
摘要翻译：公开了利用时域响应的离散傅立叶变换来生成用于无线通信的波束成形权重的方法和装置。此外，在一些实施例中，构成小于分配给用户通信的所有频率副载波的频率副载波可用于产生波束形成权重。

5. 发明授权

US08363577B2 Low complexity beamforming for multiple antenna systems 有权
公开(公告)号：US08363577B2
公开(公告)日：2013-01-29
申请号：US11158585
申请日：2005-06-21
申请人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
发明人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
IPC分类号： H04B7/00 , H04W4/00
CPC分类号： H01Q3/26 , H04B1/713 , H04B7/0617 , H04B7/0626 , H04L27/2626
摘要： Methods and apparatuses are disclosed that utilize the discrete Fourier transform of time domain responses to generate beamforming weights for wireless communication. In addition, in some embodiments frequency subcarriers constituting less than all of the frequency subcarriers allocated for communication to a user may utilized for generating the beamforming weights.

6. 发明申请

US20100329310A1 LOW COMPLEXITY BEAMFORMING FOR MULTIPLE ANTENNA SYSTEMS 失效
标题翻译：用于多个天线系统的低复杂度波束
公开(公告)号：US20100329310A1
公开(公告)日：2010-12-30
申请号：US12878503
申请日：2010-09-09
申请人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
发明人： Tingfang Ji , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Min Dong
IPC分类号： H04B1/713
CPC分类号： H01Q3/26 , H04B1/713 , H04B7/0617 , H04B7/0626 , H04L27/2626
摘要： Methods and apparatuses are disclosed that utilize the discrete Fourier transform of time domain responses to generate beamforming weights for wireless communication. In addition, in some embodiments frequency subcarriers constituting less than all of the frequency subcarriers allocated for communication to a user may utilized for generating the beamforming weights.
摘要翻译：公开了利用时域响应的离散傅立叶变换来生成用于无线通信的波束成形权重的方法和装置。此外，在一些实施例中，构成小于分配给用户通信的所有频率副载波的频率副载波可用于产生波束形成权重。

7. 发明申请

US20100254354A1 Softer and Soft Handoff in an Orthogonal Frequency Division Wireless Communication System 有权
标题翻译：正交频分无线通信系统中的软和软切换
公开(公告)号：US20100254354A1
公开(公告)日：2010-10-07
申请号：US12818078
申请日：2010-06-17
申请人： Arak Sutivong , Ayman Fawzy Naguib , Dhananjay Gore , Alexei Gorokhov , Tingfang Ji
发明人： Arak Sutivong , Ayman Fawzy Naguib , Dhananjay Gore , Alexei Gorokhov , Tingfang Ji
IPC分类号： H04W36/00
CPC分类号： H04B1/713 , H04B7/022 , H04B7/0491 , H04L5/0012 , H04L5/0023 , H04L5/0048 , H04L5/006 , H04L5/0069 , H04L25/0226 , H04L27/2613 , H04W36/18 , H04W48/08
摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance between the mobile station and the one or more antennas. In other aspect, the pattern may be based upon whether the mobile station is in handoff.
摘要翻译：提供从移动台或基站发送的导频符号的传输模式。可以根据移动台相对于一个或多个天线的位置来选择模式。在一些方面，可以基于移动台与一个或多个天线之间的距离来选择该模式。在另一方面，该模式可以基于移动台是否处于切换状态。

8. 发明授权

US07809336B2 Rate selection for a quasi-orthogonal communication system 有权
标题翻译：准正交通信系统的速率选择
公开(公告)号：US07809336B2
公开(公告)日：2010-10-05
申请号：US11150417
申请日：2005-06-10
申请人： Ayman Fawzy Naguib , Alexei Gorokhov , Tingfang Ji , Dhananjay Gore , Arak Sutivong
发明人： Ayman Fawzy Naguib , Alexei Gorokhov , Tingfang Ji , Dhananjay Gore , Arak Sutivong
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04L1/0019 , H04L1/0003 , H04L1/0016 , H04L1/06 , H04L25/0212 , H04L25/0228 , H04L25/0242 , H04L25/0256
摘要： To select a rate for a transmitter in a communication system, a receiver obtains a channel response estimate and a received SINR estimate for the transmitter, e.g., based on a pilot received from the transmitter. The receiver computes a hypothesized SINR for the transmitter based on the channel response estimate and the received SINR estimate. The receiver then selects a rate for the transmitter based on (1) the hypothesized SINR and (2) characterized statistics of noise and interference at the receiver for the transmitter, which may be given by a probability density function (PDF) of SINR loss with respect to the hypothesized SINR. A look-up table of rate versus hypothesized SINR may be generated a priori for the PDF of SINR loss. The receiver may then apply the hypothesized SINR for the transmitter to the look-up table, which then provides the rate for the transmitter.
摘要翻译：为了在通信系统中选择发射机的速率，接收机例如基于从发射机接收到的导频，获得用于发射机的信道响应估计和接收到的SINR估计。接收机基于信道响应估计和接收的SINR估计来计算发射机的假设SINR。接收机然后基于（1）假设的SINR和（2）用于发射机的接收机处的噪声和干扰的特征统计来选择发射机的速率，其可以由SINR丢失的概率密度函数（PDF）给出，尊重假设的SINR。速率与假设SINR的查找表可能会先于SINR损失的PDF生成。然后，接收机可以将发射机的假设SINR应用于查找表，然后查找表提供发射机的速率。

9. 发明授权

US07768979B2 Separating pilot signatures in a frequency hopping OFDM system by selecting pilot symbols at least hop away from an edge of a hop region 有权
标题翻译：通过选择导频符号至少跳过跳跃区域的边缘，在跳频OFDM系统中分离导频签名
公开(公告)号：US07768979B2
公开(公告)日：2010-08-03
申请号：US11132765
申请日：2005-05-18
申请人： Arak Sutivong , Ayman Fawzy Naguib , Dhananjay Gore , Alexei Gorokhov , Tingfang Ji
发明人： Arak Sutivong , Ayman Fawzy Naguib , Dhananjay Gore , Alexei Gorokhov , Tingfang Ji
IPC分类号： H04W4/00
CPC分类号： H04B1/713 , H04B7/022 , H04B7/0491 , H04L5/0012 , H04L5/0023 , H04L5/0048 , H04L5/006 , H04L5/0069 , H04L25/0226 , H04L27/2613 , H04W36/18 , H04W48/08
摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance between the mobile station and the one or more antennas. In other aspect, the pattern may be based upon whether the mobile station is in handoff.
摘要翻译：提供从移动台或基站发送的导频符号的传输模式。可以根据移动台相对于一个或多个天线的位置来选择模式。在一些方面，可以基于移动台与一个或多个天线之间的距离来选择该模式。在另一方面，该模式可以基于移动台是否处于切换状态。

10. 发明授权

US09143305B2 Pilot signal transmission for an orthogonal frequency division wireless communication system 有权
标题翻译：用于正交频分无线通信系统的导频信号传输
公开(公告)号：US09143305B2
公开(公告)日：2015-09-22
申请号：US11083693
申请日：2005-03-17
申请人： Alexei Gorokhov , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Ashok Gore , Tingfang Ji
发明人： Alexei Gorokhov , Ayman Fawzy Naguib , Arak Sutivong , Dhananjay Ashok Gore , Tingfang Ji
IPC分类号： H04J11/00 , H04L5/02 , H04L5/00 , H04L27/26 , H04B3/10 , H04W4/00 , H04L12/16
CPC分类号： H04L5/023 , H04L5/0007 , H04L5/0039 , H04L5/0051 , H04L5/0062 , H04L27/261
摘要： Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and/or biasing from different mobile stations over the same frequencies and in the same time slots.
摘要翻译：提供从移动台或基站发送的导频符号的传输模式。该模式允许改进对所发送的导频符号的接收。另外，用于在相同的频率和相同的时隙中提高在不干扰和/或来自不同移动台的偏置的情况下导频符号的复用能力的方案。

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