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1. 发明授权

US06392988B1 Transmitter architecture employing space time spreading and orthogonal transmit diversity techniques 有权
标题翻译：采用时空扩展和正交发射分集技术的发射机架构
公开(公告)号：US06392988B1
公开(公告)日：2002-05-21
申请号：US09394172
申请日：1999-09-13
申请人： Stephen Alan Allpress , R. Michael Buehrer , Quinn Li , Nallepilli S. Ramesh , Robert Atmaram Soni
发明人： Stephen Alan Allpress , R. Michael Buehrer , Quinn Li , Nallepilli S. Ramesh , Robert Atmaram Soni
IPC分类号： H04J1100
CPC分类号： H04L1/0618
摘要： Disclosed is a common transmitter architecture having incorporated both open loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the transmitter is utilizing a orthogonal transmit diversity (OTD) scheme or a space time spreading (STS) scheme. Accordingly, the number of components in the transmitter is minimized and the complexity of the transmitter is simple enough to be implemented into a single application specific integrated chip.
摘要翻译：公开了一种共同的发射机架构，其结合了使用多个二进制交换机的开环发射分集方案。二进制交换机的使用允许某些组件的共享，无论发射机是利用正交发射分集（OTD）方案还是空间时间扩展（STS）方案。因此，发射机中的组件数量被最小化，并且发射机的复杂性足够简单以被实现到单个专用集成芯片中。

2. 发明授权

US06317410B1 Receiver architecture employing space time spreading and orthogonal transmit diversity techniques 有权
标题翻译：采用时空扩展和正交发射分集技术的接收机架构
公开(公告)号：US06317410B1
公开(公告)日：2001-11-13
申请号：US09395325
申请日：1999-09-13
申请人： Stephen Alan Allpress , R. Michael Buehrer , Robert Atmaram Soni
发明人： Stephen Alan Allpress , R. Michael Buehrer , Robert Atmaram Soni
IPC分类号： H04J1100
CPC分类号： H04B7/0854 , H04L1/06 , H04L1/0618
摘要： Disclosed is a receiver transmitter architecture having incorporated both open loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the receiver is utilizing a orthogonal transmit diversity (OTD) scheme or a space time spreading (STS) scheme. Accordingly, the number of components in the receiver is minimized and the complexity of the receiver is simple enough to be implemented into a single application specific integrated chip.
摘要翻译：公开了一种使用多个二进制开关并入两个开环发射分集方案的接收机发射机架构。二进制交换机的使用允许某些组件的共享，无论接收机是使用正交发射分集（OTD）方案还是空间时间扩展（STS）方案。因此，接收机中的组件数量被最小化，并且接收机的复杂性足够简单以被实现到单个专用集成芯片中。

3. 发明授权

US06515978B1 Methods and apparatus for downlink diversity in CDMA using Walsh codes 有权
公开(公告)号：US06515978B1
公开(公告)日：2003-02-04
申请号：US09294661
申请日：1999-04-19
申请人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
发明人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
IPC分类号： H03D100
CPC分类号： H04B1/7103 , H04B1/707 , H04B7/0613 , H04B2201/709709 , H04J13/0048 , H04J13/0077 , H04J13/18 , H04L1/06 , H04L1/0618
摘要： Downlink diversity in a CDMA system is provided by employing Walsh codes in conjunction with M transmit antennas at a common base station serving K mobiles, where M may or may not be to equal to K. The present invention provides methods and apparatus for improving downlink diversity in a CDMA system. Each transmit antenna transmits a signal representing the result of the modulation of Walsh codes by data signals for each of the K mobiles, assuming there is data pertaining to a particular mobile. The assignment of Walsh codes is accomplished in accordance with a transmission matrix T. The transmission matrix maps the user data symbols onto the Walsh codes for each antenna and is preferably designed such that its columns are representative of the transmit antennas and orthogonal. Thus, at a given mobile, the mobile need only correlate with M different Walsh codes since each transmit signal received contains a component that is the result of M different Walsh codes having been modulated by a data signal associated with that particular mobile. The set of Walsh codes to select from includes 2┌log2(K)┐ Walsh codes. However, with respect to any given mobile, there is needed only as many different Walsh codes as there are transmit antennas serving the particular mobile. The results of the respective M correlations are combined and, with obtained channel estimates, the receiver estimates the particular data pertaining to that particular mobile so that it can be provided to the user. Also, the present invention provides for various ways to estimate the respective channels between the M transmit antennas and a mobile. It is to be appreciated that the downlink diversity techniques of the invention may be applied to the physical layer proposed in the IS95-C physical layer draft proposal.

4. 发明授权

US06920314B2 Symmetric sweep phase sweep transmit diversity 失效
标题翻译：对称扫描相位扫描发射分集
公开(公告)号：US06920314B2
公开(公告)日：2005-07-19
申请号：US09918392
申请日：2001-07-30
申请人： Roger David Benning , R. Michael Buehrer , Paul Anthony Polakos , Robert Atmaram Soni
发明人： Roger David Benning , R. Michael Buehrer , Paul Anthony Polakos , Robert Atmaram Soni
IPC分类号： H04B7/06 , A04B1/02
CPC分类号： H04B7/0669 , H04B7/0678
摘要： Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without degrading performance of either STS or PSTD using a symmetric sweep PSTD transmission architecture. In one embodiment, a pair of signals s1 and s2 are split into signals s1(a) and s1(b) and signals s2(a) and s2(b), respectively. Signal s1 comprises a first STS/OTD signal belonging to an STS/OTD pair, and signal s2 comprises a second STS/OTD signal belonging to the STS/OTD pair. Signals s1(b) and s2(b) are phase swept using a pair of phase sweep frequency signals that would cancel out any self induced interference. For example, the pair of phase sweep frequency signals utilize a same phase sweep frequency with one of the phase sweep frequency signals rotating in the opposite direction plus an offset of π relative to the other phase sweep frequency signal. The resultant phase swept signals s1(b) and s2(b) are added to signals s2(a) and s1(a) before being amplified and transmitted.
摘要翻译：这里描述了一种用于传输的方法和装置，其提供空间时间扩展（STS）或正交发射分集（OTD）的性能以及相位扫描发射分集（PSTD）的向后兼容性，而不会降低使用对称的STS或PSTD的性能扫描PSTD传输架构。在一个实施例中，一对信号s 1和s 2 2被分割成信号s 1（a）和s 1 < （b）和信号s 2（a）和s 2（b）。信号S1 <1>包括属于STS / OTD对的第一STS / OTD信号，信号s 2包括属于STS / OTD对的第二STS / OTD信号。使用一对可以消除任何自身干扰的相位扫描频率信号来相位扫描信号s 1（b）和s 2（b）。例如，该对相位扫描频率信号利用相同的相位扫描频率，其中相位扫描频率信号中的一个相反方向旋转加上相对于另一个相位扫描频率信号的pi偏移。所得到的相位扫描信号s 1（b）和s 2（b）被加到信号s2（a）和s

5. 发明授权

US06980778B2 Split shift phase sweep transmit diversity 有权
标题翻译：拆分相移扫描发射分集
公开(公告)号：US06980778B2
公开(公告)日：2005-12-27
申请号：US09918086
申请日：2001-07-30
申请人： Roger David Benning , R. Michael Buehrer , Paul Anthony Polakos , Robert Atmaram Soni
发明人： Roger David Benning , R. Michael Buehrer , Paul Anthony Polakos , Robert Atmaram Soni
IPC分类号： H04B7/06 , H04B7/02
CPC分类号： H04B7/0669 , H04B7/0678
摘要： Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not degrade performance using a transmission architecture that incorporates a form of phase sweep transmit diversity (PSTD) referred to herein as split shift PSTD. Split shift PSTD involves transmitting at least two phase swept versions of a signal over diversity antennas, wherein the two phase swept versions of the signal have a different phase. The phase sweep frequency signals may have a fixed or varying phase shifting rate, may have an identical or different phase shifting rate, may be offset from each other and/or may be phase shifting in the same or opposite direction.
摘要翻译：公开了一种发射分集的方法和装置，其是向后兼容的并且不会使用包含这里称为分离移位PSTD的相位扫描发射分集（PSTD）形式的传输架构来降低性能。分离移位PSTD涉及通过分集天线发射信号的至少两个相位扫描版本，其中信号的两相扫描版本具有不同的相位。相位扫描频率信号可以具有固定或变化的相移速率，可以具有相同或不同的相移速率，可以彼此偏移和/或可以在相同或相反的方向上相移。

6. 发明授权

US07400614B2 Methods and apparatus for downlink diversity in CDMA using Walsh codes 有权
标题翻译：使用Walsh码的CDMA下行链路分集的方法和装置
公开(公告)号：US07400614B2
公开(公告)日：2008-07-15
申请号：US10282455
申请日：2002-10-29
申请人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
发明人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
IPC分类号： H04B7/216 , H04J11/00 , H04J13/00 , H04B1/02 , H04B1/66
CPC分类号： H04B1/7103 , H04B1/707 , H04B7/0613 , H04B2201/709709 , H04J13/0048 , H04J13/0077 , H04J13/18 , H04L1/06 , H04L1/0618
摘要： Downlink diversity in a CDMA system is provided by employing Walsh codes in conjunction with M transmit antennas at a common base station serving K mobiles, where M may or may not be to equal to K. The present invention provides methods and apparatus for improving downlink diversity in a CDMA system. Each transmit antenna transmits a signal representing the result of the modulation of Walsh codes by data signals for each of the K mobiles, assuming there is data pertaining to a particular mobile. The assignment of Walsh codes is accomplished in accordance with a transmission matrix T. The transmission matrix maps the user data symbols onto the Walsh codes for each antenna and is preferably designed such that its columns are representative of the transmit antennas and orthogonal. Thus, at a given mobile, the mobile need only correlate with M different Walsh codes since each transmit signal received contains a component that is the result of M different Walsh codes having been modulated by a data signal associated with that particular mobile. The set of Walsh codes to select from includes 2┌log2(K)┐ Walsh codes. However, with respect to any given mobile, there is needed only as many different Walsh codes as there are transmit antennas serving the particular mobile. The results of the respective M correlations are combined and, with obtained channel estimates, the receiver estimates the particular data pertaining to that particular mobile so that it can be provided to the user. Also, the present invention provides for various ways to estimate the respective channels between the M transmit antennas and a mobile. It is to be appreciated that the downlink diversity techniques of the invention may be applied to the physical layer proposed in the IS95-C physical layer draft proposal.
摘要翻译： CDMA系统中的下行链路分集通过在服务于K个移动台的公共基站处与M个发射天线结合使用Walsh码来提供，其中M可以或可以不等于K.本发明提供了用于改善下行链路分集的方法和装置在CDMA系统中。假设存在与特定移动站有关的数据，每个发送天线通过用于K个移动台中的每一个的数据信号来发送表示沃尔什码的调制结果的信号。沃尔什码的分配根据传输矩阵T完成。传输矩阵将用户数据符号映射到每个天线的沃尔什码上，并且优选地被设计为使得其列表示发射天线并且是正交的。因此，在给定的移动站处，移动站仅需要与M个不同的沃尔什码相关，因为所接收的每个发送信号包含一个分量，该分量是由与该特定移动站相关联的数据信号调制的M个不同沃尔什码的结果。选择的沃尔什码集合包括沃尔什码（2）<2> （K）┐ Walsh码。然而，对于任何给定的移动站，仅需要与为特定移动站服务的发射天线一样多的不同沃尔什码。各个M相关的结果被组合，并且利用所获得的信道估计，接收机估计与该特定移动台有关的特定数据，以便可以向用户提供。此外，本发明提供了估计M个发射天线和移动台之间的相应信道的各种方式。应当理解，本发明的下行链路分集技术可以应用于IS95-C物理层草案提案中提出的物理层。

7. 发明授权

US07035599B2 Biased phase sweep transmit diversity 失效
公开(公告)号：US07035599B2
公开(公告)日：2006-04-25
申请号：US09918393
申请日：2001-07-30
申请人： Roger David Benning , R. Michael Buehrer , Robert Atmaram Soni
发明人： Roger David Benning , R. Michael Buehrer , Robert Atmaram Soni
IPC分类号： A04B1/02
CPC分类号： H04B7/0615 , H04B7/0667 , H04B7/0682
摘要： Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not significantly degrade performance in additive white guassan noise (AWGN) conditions using a transmission architecture that incorporates a form of phase sweep transmit diversity (PSTD) referred to herein as biased PSTD. Biased PSTD involves transmitting a signal and a frequency swept version of the same signal over diversity antennas at different power levels. By transmitting the two signals at different power levels, the depths of nulls normally seen in AWGN conditions when PSTD is utilized is reduced and performance degradation in AWGN conditions is mitigated.

8. 发明授权

US06801791B2 Cellular communications system and related methods 有权
标题翻译：蜂窝通信系统及相关方法
公开(公告)号：US06801791B2
公开(公告)日：2004-10-05
申请号：US09810694
申请日：2001-03-14
申请人： R. Michael Buehrer , Steven Peter Nicoloso , Robert Atmaram Soni , Dirck Uptegrove
发明人： R. Michael Buehrer , Steven Peter Nicoloso , Robert Atmaram Soni , Dirck Uptegrove
IPC分类号： H04M100
CPC分类号： H04B7/0615
摘要： A cellular communications system includes a base station and at least one mobile station communicating therewith. The base station may include a plurality of antennas and a modulator for providing a transmit signal for each antenna. The modulator may estimate a weighting factor for each transmit signal based upon considering each transmit signal as having an unknown and arbitrary fading factor associated therewith and based upon considering the unknown and arbitrary fading factors to have a predetermined cross-correlation function.
摘要翻译：蜂窝通信系统包括基站和与其通信的至少一个移动站。基站可以包括多个天线和用于为每个天线提供发射信号的调制器。基于将每个发射信号考虑为与其相关联的未知和任意衰落因子并且基于考虑未知和任意衰落因子以具有预定的互相关函数，调制器可以估计每个发射信号的加权因子。

9. 发明授权

US06594226B1 Apparatus and method of enhancing transmit diversity 失效
标题翻译：增强发射分集的装置和方法
公开(公告)号：US06594226B1
公开(公告)日：2003-07-15
申请号：US09464615
申请日：1999-12-15
申请人： Roger David Benning , R. Michael Buehrer , Robert Atmaram Soni
发明人： Roger David Benning , R. Michael Buehrer , Robert Atmaram Soni
IPC分类号： H04J1100
CPC分类号： H04B7/0613 , H04L1/08
摘要： Disclosed is a method and apparatus for enhancing diversity gain without reducing data rate by increasing the number of antenna elements and configuring the antenna elements for improving signal-to-noise ratio at a receiver. The antenna array comprise a first antenna group with at least two antenna elements and a second antenna group with at least one antenna element. The first and second antenna groups are spaced approximately ten carrier wavelengths or more apart from each other, and the antenna elements belonging to the first antenna group are spaced approximately a half carrier wavelength or less apart from each other. A plurality of data streams is generated from a signal and used to produce a first and second plurality of representative data streams. Each of the first plurality of representative data streams is phase-shifted and encoded using different orthogonal codes.
摘要翻译：公开了一种用于通过增加天线元件的数量并配置天线元件来提高分集增益而不降低数据速率的方法和装置，以提高接收机的信噪比。天线阵列包括具有至少两个天线元件的第一天线组和具有至少一个天线元件的第二天线组。第一和第二天线组彼此间隔大约十个载波波长或更多，并且属于第一天线组的天线元件彼此间隔大约半个载波波长或更小。从信号生成多个数据流，并且用于产生第一和第二多个代表性数据流。第一多个代表性数据流中的每一个被相移并且使用不同的正交码进行编码。

10. 发明授权

US07042955B2 Space time spreading and phase sweep transmit diversity 有权
公开(公告)号：US07042955B2
公开(公告)日：2006-05-09
申请号：US09918391
申请日：2001-07-30
申请人： Roger David Benning , R. Michael Buehrer , Mark H Kraml , Paul Anthony Polakos
发明人： Roger David Benning , R. Michael Buehrer , Mark H Kraml , Paul Anthony Polakos
IPC分类号： H04B7/02 , H04B7/10 , H04B7/216
CPC分类号： H04B7/12 , H04W52/42
摘要： Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without significantly degrading performance in additive white guassan noise (AWGN) conditions using a transmission architecture that incorporates STS/OTD and a form of phase sweep transmit diversity (PSTD) referred to herein as biased PSTD, which involves transmitting a signal and a frequency swept version of the same signal over diversity antennas at different power levels to reduce the depths of nulls normally seen in AWGN conditions when regular PSTD is utilized.

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