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21.发明授权Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel 有权无线通信系统，具有从与主同步信道相关选择的多个路径的组合公开(公告)号：US06829290B1
公开(公告)日：2004-12-07
申请号：US09669394
申请日：2000-09-26
IPC分类号： H04B169
CPC分类号： H04B1/7115 , H04B1/709 , H04B1/7117 , H04B2201/70707
摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols, and circuitry for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. Finally, the receiver comprises circuitry for combining (54, 58) the plurality of largest-amplitude paths in response to identification of those paths by the circuitry for identifying.
摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括用于将多个符号组中的主同步码相互关联的电路（52）以及用于识别组内的多个路径位置的电路。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 最后，接收机包括用于响应于用于识别的电路的那些路径的识别来组合（54,58）多个最大幅度路径的电路。
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公开(公告)号：US06804311B1
公开(公告)日：2004-10-12
申请号：US09526019
申请日：2000-03-15
申请人： Anand G. Dabak , Srinath Hosur , Shigenori Kinjo , Alan Gatherer
发明人： Anand G. Dabak , Srinath Hosur , Shigenori Kinjo , Alan Gatherer
IPC分类号： H04L2720
CPC分类号： H04B7/06 , H04L25/0228
摘要： A circuit for detecting a transmit diversity signal comprises a first circuit (706) arranged to receive a first synchronization code. The first synchronization code is modulated by a data signal. The first circuit produces a first output signal. A second circuit (732) is arranged to receive a plurality of predetermined signals. The second circuit produces a channel estimate. A detection circuit (710, 712) is arranged to receive the first output signal and the channel estimate. The detection circuit produces a signal corresponding to the data signal.
摘要翻译： 用于检测发射分集信号的电路包括布置成接收第一同步码的第一电路（706）。 第一同步码由数据信号调制。 第一电路产生第一输出信号。 第二电路（732）被布置成接收多个预定信号。 第二电路产生信道估计。 检测电路（710,712）被布置成接收第一输出信号和信道估计。 检测电路产生对应于数据信号的信号。
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23.发明授权Method and device for recovering synchronization on a signal transmitted to a mobile-telephone receiver 失效用于恢复发送到移动电话接收机的信号上的同步的方法和装置公开(公告)号：US06366574B1
公开(公告)日：2002-04-02
申请号：US09086689
申请日：1998-05-28
申请人： Eric Baissus , Srinath Hosur , Anand G. Dabak
发明人： Eric Baissus , Srinath Hosur , Anand G. Dabak
IPC分类号： H04J306
CPC分类号： H04L7/10 , H04L7/0334 , H04L7/041 , H04L7/046
摘要： Device for recovering synchronization on a signal transmitted to a mobile-telephone receiver, including phase-estimator means (47, 49) for the absolute value (ABS) and the sign (SIGN) of the transmitted signal, estimation processor (64) for processing the output signals of the estimators (47, 49), a sequencer (67), one input of which is connected to the output of the processor (64) and one output of which applies a mode signal to the processor, another output of the sequencer (67) being connected via a sampling-time generator (68) to the sampling-time control inputs of the estimators (47, 49).
摘要翻译： 用于恢复发送到移动电话接收机的信号的同步的装置，包括用于绝对值（ABS）的相位估计装置（47,49）和发送信号的符号（SIGN），用于处理的估计处理器 估计器（47,49）的输出信号，定序器（67），其一个输入端连接到处理器（64）的输出，其一个输出端向处理器施加模式信号，另一个输出端 定序器（67）经由采样时间发生器（68）连接到估计器（47,49）的采样时间控制输入端。
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公开(公告)号：US06166622A
公开(公告)日：2000-12-26
申请号：US181109
申请日：1998-10-28
摘要： A communication circuit is designed with a processing circuit (11) coupled to receive a plurality of first control signals (402, 408) from a source external to the communication circuit. The processing circuit produces a second control signal (432, 434) and a second power control (422, 436) signal during each of a plurality of predetermined time periods. The second power control signal is determined by a corresponding first control signal from said plurality of first control signals. The second power control signal is produced proximate the second control signal. A serial circuit is coupled to receive the second control signal and the second power control signal during a respective predetermined time period. The serial circuit produces the second control signal proximate the second power control signal.
摘要翻译： 通信电路被设计成具有耦合以从通信电路外部的源接收多个第一控制信号（402,408）的处理电路（11）。 处理电路在多个预定时间段的每一个期间产生第二控制信号（432,434）和第二功率控制（422,436）信号。 第二功率控制信号由来自所述多个第一控制信号的对应的第一控制信号确定。 在第二控制信号附近产生第二功率控制信号。 串联电路被耦合以在相应的预定时间段期间接收第二控制信号和第二功率控制信号。 串行电路产生靠近第二功率控制信号的第二控制信号。
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25.再颁专利Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities 有权具有发射机的无线系统具有多个发射天线并组合开环和闭环发射分集公开(公告)号：USRE42681E1
公开(公告)日：2011-09-06
申请号：US11124595
申请日：2005-05-05
申请人： Anand G. Dabak , Srinath Hosur
发明人： Anand G. Dabak , Srinath Hosur
CPC分类号： H04B7/0634 , H04B7/061 , H04B7/0669 , H04B7/0673 , H04L1/0618
摘要： A wireless communication system (40). The system comprises transmitter circuitry (42) comprising encoder circuitry (44) for receiving a plurality of symbols (Si). The system further comprises a plurality of antennas (AT1-AT4) coupled to the transmitter circuitry and for transmitting signals from the transmitter circuitry to a receiver (UST), wherein the signals are responsive to the plurality of symbols. Further, the encoder circuitry is for applying open loop diversity and closed loop diversity to the plurality of symbols to form the signals.
摘要翻译： 一种无线通信系统（40）。 该系统包括发射机电路（42），包括用于接收多个符号（Si）的编码器电路（44）。 该系统还包括耦合到发射机电路的多个天线（AT1-AT4），并用于将信号从发射机电路传输到接收机（UST），其中信号响应于多个符号。 此外，编码器电路用于向多个符号施加开环分集和闭环分集以形成信号。
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公开(公告)号：US20080273497A1
公开(公告)日：2008-11-06
申请号：US11800703
申请日：2007-05-04
申请人： Xiaolin Lu , Rao Venkatasadasiva , Zigang Yang , Anand G. Dabak , Srinath Hosur , Badri Varadarajan , Susan Yim
发明人： Xiaolin Lu , Rao Venkatasadasiva , Zigang Yang , Anand G. Dabak , Srinath Hosur , Badri Varadarajan , Susan Yim
IPC分类号： H04Q7/00
摘要： A method of wireless handover in a broadcast network (FIGS. 5 and 8) is disclosed. A wireless receiver (FIG. 4) receives a first signal (N) from a first transmitter (f1). The receiver measures a signal strength (RSSI) of the first signal. The strength of the first signal is compared to a first threshold (T0). The receiver receives a second signal (N+3) from a second transmitter (f3) in response to the step of comparing. The first and the second signals are sent to an application processor (120). The wireless receiver continues to receive the first and second signals until the application processor terminates receiving one of the first and second signals.
摘要翻译： 公开了广播网络中的无线切换的方法（图5和图8）。 无线接收器（图4）从第一发射机（f 1> 1）接收第一信号（N）。 接收机测量第一信号的信号强度（RSSI）。 将第一信号的强度与第一阈值（T 0> 0）进行比较。 响应于比较步骤，接收机从第二发射机（f 3> 3）接收第二信号（N + 3）。 第一和第二信号被发送到应用处理器（120）。 无线接收机继续接收第一和第二信号，直到应用处理器终止接收第一和第二信号之一。
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27.发明授权Maximum likelihood timing synchronizers for sampled PSK burst TDMA system 有权采样PSK突发TDMA系统的最大似然定时同步器公开(公告)号：US07003016B1
公开(公告)日：2006-02-21
申请号：US09417233
申请日：1999-10-13
申请人： Srinath Hosur , Anand G. Dabak
发明人： Srinath Hosur , Anand G. Dabak
IPC分类号： H04L27/30
CPC分类号： H04L27/2332 , H04L7/042
摘要： A method of producing a correction signal includes receiving a predetermined data sequence (500). The data sequence is sampled at predetermined times, thereby producing a sampled data sequence (522, 532). The sampled data sequence is separated into first and second sampled data sequences. A ratio is calculated (550, 558) from the first and second sampled data sequences. A correction signal is produced (556, 564) in response to the ratio.
摘要翻译： 产生校正信号的方法包括接收预定的数据序列（500）。 在预定时间采样数据序列，从而产生采样数据序列（522,532）。 采样数据序列被分成第一和第二采样数据序列。 从第一和第二采样数据序列计算一个比率（550,558）。 根据该比率产生校正信号（556,544）。
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28.发明授权公开(公告)号：US06831956B1
公开(公告)日：2004-12-14
申请号：US09669813
申请日：2000-09-26
IPC分类号： H04B1707
CPC分类号： H04B1/7113
摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols and circuitry (52) for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. The receiver further comprises circuitry (56) for defining a plurality of sub-windows. Each of the plurality of sub-windows comprises a plurality of sample positions, and each of the plurality of sub-windows includes at least one of the plurality of identified path positions. Finally, the receiver further comprises circuitry (54, 58) for combining paths selected from the sample positions within the plurality of sub-windows.
摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括电路（52），用于在一组多个符号和电路（52）之间相互关联主同步码，用于识别组内的多个路径位置。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 接收器还包括用于限定多个子窗口的电路（56）。 多个子窗口中的每一个包括多个采样位置，并且多个子窗口中的每一个子窗口包括多个识别的路径位置中的至少一个。 最后，接收机还包括用于组合从多个子窗口内的样本位置选择的路径的电路（54,58）。
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29.发明授权Use of Walsh-Hadamard transform for forward link multiuser detection in CDMA systems 有权在CDMA系统中使用沃尔什 - 哈达玛变换进行前向链路多用户检测公开(公告)号：US06798737B1
公开(公告)日：2004-09-28
申请号：US09413314
申请日：1999-10-06
IPC分类号： H04J1100
CPC分类号： H04B1/71075 , H04B1/7115
摘要： A station capable of receiving information containing Walsh coding for a plurality of channels and canceling interference from the received information and the method of cancellation. A memory is provided for storing received signals containing a Walsh code for each of a plurality of channels as well as reflected and/or refracted versions of said received signals and a first plurality of signal paths is provided which are selectively coupled to the memory. The signal paths apply corresponding delays and inverse Walsh code transformations to separate the channels. Further, cancellation of the channels interfering with a desired channel proceeds with complementary delays and Walsh code transformation to regenerate the interference which is subtracted from the received signal in memory.
摘要翻译： 一种能够接收包含用于多个信道的沃尔什编码的信息并且从接收的信息中消除干扰的消息的站和消除方法。 提供存储器用于存储包含多个通道中的每一个的沃尔什码的接收信号以及所述接收信号的反射和/或折射版本，并且提供选择性地耦合到存储器的第一多个信号路径。 信号路径应用相应的延迟和反向沃尔什码变换来分离信道。 此外，干扰所需信道的信道的消除继续进行互补延迟和沃尔什码变换以再生从存储器中的接收信号中减去的干扰。
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公开(公告)号：US06404826B1
公开(公告)日：2002-06-11
申请号：US09218939
申请日：1998-12-22
IPC分类号： H04L2706
CPC分类号： H04B1/7097 , H04L1/20
摘要： A circuit is designed with an estimate circuit (132) coupled to receive a plurality of predetermined signals (416-418) from an external source. Each of the predetermined signals is spaced apart in time. The estimate cit produces a first estimate signal in response to at least one of the plurality of predetermined signals. An averaging circuit is coupled to receive a data signal 420 and at least one of the plurality of predetermined signals. The averaging circuit produces an average signal from the data signal and at least one of the plurality of predetermined signals.
摘要翻译： 电路被设计成具有耦合以从外部源接收多个预定信号（416-418）的估计电路（132）。 每个预定信号在时间上间隔开。 估计值响应于多个预定信号中的至少一个产生第一估计信号。 平均电路被耦合以接收数据信号420和多个预定信号中的至少一个。 平均电路从数据信号和多个预定信号中的至少一个产生平均信号。
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