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公开(公告)号：US20090279634A1
公开(公告)日：2009-11-12
申请号：US12470241
申请日：2009-05-21
IPC分类号： H04B7/02
CPC分类号： H04L1/06
摘要： A circuit is designed with a measurement circuit (746) coupled to receive an input signal from at least one of a first antenna and a second antenna of a transmitter. The measurement circuit produces an output signal corresponding to a magnitude of the input signal. A control circuit (726) is coupled to receive the output signal, a first reference signal (.eta..sub.1) and a second reference signal (.eta..sub.2). The control circuit is arranged to produce a control signal in response to a comparison of the output signal, the first reference signal and the second reference signal.
摘要翻译： 电路设计有测量电路（746），耦合到接收来自发射机的第一天线和第二天线中的至少一个的输入信号。 测量电路产生对应于输入信号幅度的输出信号。 控制电路（726）被耦合以接收输出信号，第一参考信号（...）和第二参考信号（...）。 控制电路被配置为响应于输出信号，第一参考信号和第二参考信号的比较而产生控制信号。
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公开(公告)号：US08059746B2
公开(公告)日：2011-11-15
申请号：US12470241
申请日：2009-05-21
CPC分类号： H04L1/06
摘要： A circuit is designed with a measurement circuit (746) coupled to receive an input signal from at least one of a first antenna and a second antenna of a transmitter. The measurement circuit produces an output signal corresponding to a magnitude of the input signal. A control circuit (726) is coupled to receive the output signal, a first reference signal (.eta..sub.1) and a second reference signal (.eta..sub.2). The control circuit is arranged to produce a control signal in response to a comparison of the output signal, the first reference signal and the second reference signal.
摘要翻译： 电路设计有测量电路（746），耦合到接收来自发射机的第一天线和第二天线中的至少一个的输入信号。 测量电路产生对应于输入信号幅度的输出信号。 控制电路（726）被耦合以接收输出信号，第一参考信号（...）和第二参考信号（...）。 控制电路被布置成响应于输出信号，第一参考信号和第二参考信号的比较而产生控制信号。
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3.发明授权Producing control signals indicating transmit diversity and no transmit diversity 有权产生指示发射分集和无发射分集的控制信号公开(公告)号：US07555068B2
公开(公告)日：2009-06-30
申请号：US10808621
申请日：2004-03-24
CPC分类号： H04L1/06
摘要： A circuit is designed with a measurement circuit (746) coupled to receive an input signal from at least one of a first antenna and a second antenna of a transmitter. The measurement circuit produces an output signal corresponding to a magnitude of the input signal. A control circuit (726) is coupled to receive the output signal, a first reference signal (η1) and a second reference signal (η2). The control circuit is arranged to produce a control signal in response to a comparison of the output signal, the first reference signal and the second reference signal.
摘要翻译： 电路设计有测量电路（746），耦合到接收来自发射机的第一天线和第二天线中的至少一个的输入信号。 测量电路产生对应于输入信号幅度的输出信号。 控制电路（726）被耦合以接收输出信号，第一参考信号（eta1）和第二参考信号（eta2）。 控制电路被布置成响应于输出信号，第一参考信号和第二参考信号的比较而产生控制信号。
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公开(公告)号：US06728302B1
公开(公告)日：2004-04-27
申请号：US09373855
申请日：1999-08-13
IPC分类号： H04B169
CPC分类号： H04L1/06
摘要： A circuit is designed with a measurement circuit (746) coupled to receive an input signal from at least one of a first antenna and a second antenna of a transmitter. The measurement circuit produces an output signal corresponding to a magnitude of the input signal. A control circuit (726) is coupled to receive the output signal, a first reference signal (&eegr;1) and a second reference signal (&eegr;2). The control circuit is arranged to produce a control signal in response to a comparison of the output signal, the first reference signal and the second reference signal.
摘要翻译： 电路设计有测量电路（746），耦合到接收来自发射机的第一天线和第二天线中的至少一个的输入信号。 测量电路产生对应于输入信号幅度的输出信号。 控制电路（726）被耦合以接收输出信号，第一参考信号（eta1）和第二参考信号（eta2）。 控制电路被布置成响应于输出信号，第一参考信号和第二参考信号的比较而产生控制信号。
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公开(公告)号：US08290492B2
公开(公告)日：2012-10-16
申请号：US11800703
申请日：2007-05-04
申请人： Xiaolin Lu , Rao P. Venkatasadasiva , Zigang Yang , Anand Ganesh Dabak , Badri Varadarajan , Srinath Hosur , Susan Yim
发明人： Xiaolin Lu , Rao P. Venkatasadasiva , Zigang Yang , Anand Ganesh Dabak , Badri Varadarajan , Srinath Hosur , Susan Yim
IPC分类号： H04W36/00
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）。 无线接收机（图4）从第一发射机（f1）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（T0）进行比较。 响应于比较步骤，接收机从第二发射机（f3）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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公开(公告)号：US08553730B2
公开(公告)日：2013-10-08
申请号：US12868397
申请日：2010-08-25
申请人： Timothy M. Schmidl , Anuj Batra , Srinath Hosur
发明人： Timothy M. Schmidl , Anuj Batra , Srinath Hosur
IPC分类号： H04J3/06
CPC分类号： H04W56/001 , H04L27/2613 , H04L27/2634 , H04W4/80
摘要： A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.
摘要翻译： 一种方法包括接收包括复数部分的第一多个符号。 该方法还包括将共轭对称性应用于第一多个符号，产生不包含复杂部分的第二多个符号。 该方法还包括使用快速傅里叶反变换来变换第二多个符号，产生第三个多个符号。 该方法还包括内插第三多个符号，产生包括第三多个符号的至少一个实部的短训练场，产生包括第三多个符号的至少一个实部的长训练场，并发送 短期培训领域和长期培训领域的WPAN。
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公开(公告)号：US08391228B2
公开(公告)日：2013-03-05
申请号：US12760513
申请日：2010-04-14
申请人： Anuj Batra , Timothy M. Schmidl , Srinath Hosur , June Chul Roh
发明人： Anuj Batra , Timothy M. Schmidl , Srinath Hosur , June Chul Roh
CPC分类号： H04W4/80 , H04L27/18 , H04L27/20 , H04L27/2675 , H04L69/22 , H04W52/36 , H04W52/367 , H04W72/0453 , H04W74/0816
摘要： In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to construct a physical-layer service data unit (PSDU) based on a concatenate block, an insert shortened bits block, a Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoder, a remove shortened bits block, an add pad bits block, a spreader, a bit interleaver, a scrambler, and a symbol mapper.
摘要翻译： 在至少一些实施例中，通信设备包括具有物理（PHY）层的收发器。 基于用于BAN分组传输的恒定符号速率并且基于M-ary PSK，差分M-ary PSK或旋转差分M-ary PSK调制，PHY层被配置用于在有限多径环境中的体区域网络（BAN）操作。 PHY层被配置为基于级联块，插入缩短的比特块，Bose，Ray-Chaudhuri，Hocquenghem（BCH）编码器，移除缩短的比特块，加法来构造物理层服务数据单元（PSDU） 填充比特块，扩展器，比特交织器，加扰器和符号映射器。
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公开(公告)号：US08488655B2
公开(公告)日：2013-07-16
申请号：US12760516
申请日：2010-04-14
申请人： Anuj Batra , Timothy M. Schmidl , Srinath Hosur , June Chul Roh
发明人： Anuj Batra , Timothy M. Schmidl , Srinath Hosur , June Chul Roh
IPC分类号： H04B1/40
CPC分类号： H04W4/80 , H04L27/18 , H04L27/20 , H04L27/2675 , H04L69/22 , H04W52/36 , H04W52/367 , H04W72/0453 , H04W74/0816
摘要： In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.
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9.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：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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