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51.发明申请System and method for channelization and data multiplexing in a wireless communication network 审中-公开用于无线通信网络中的信道化和数据复用的系统和方法公开(公告)号：US20050180375A1
公开(公告)日：2005-08-18
申请号：US11032402
申请日：2005-01-10
CPC分类号： H04B1/71632 , H04J13/0022
摘要： A system and method for channelization and data multiplexing in ultra-wideband (UWB) wireless communication system is described. The spectrum allocated for UWB in a multi-band OFDM (orthogonal frequency division multiplex) system is subdivided into various bands. A set of time frequency codes (TFC's) is defined, wherein each code specifies one of a plurality of unique band versus time sequences for a particular band group, for sequential data symbols of a given piconet. The separation of data words from multiple devices or multiple simultaneously operating piconets (SOP's) is provided by a combination of FDMA and TFC's. The combination of FDMA and TFC's provides a simplified interface between the MAC and PHY.
摘要翻译： 描述了在超宽带（UWB）无线通信系统中的信道化和数据复用的系统和方法。 在多频带OFDM（正交频分复用）系统中为UWB分配的频谱被细分成各种频带。 定义一组时间频率码（TFC），其中每个码指定给定微微网的顺序数据符号的特定频带组的多个唯一频带对时间序列中的一个。 数据字从多个设备或多个同时操作的微微网（SOP）的分离由FDMA和TFC的组合提供。 FDMA和TFC的组合提供了MAC和PHY之间的简化接口。
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公开(公告)号：US08831077B2
公开(公告)日：2014-09-09
申请号：US13163513
申请日：2011-06-17
申请人： Badri Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
发明人： Badri Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
CPC分类号： H03K7/08 , H04B3/54 , H04B2203/5416 , H04L25/4902
摘要： Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). The EVSE and EV exchange a Pulse Width Modulation (PWM) signal on the pilot wire to control charging operations of the EV. Data communications may also be transmitted on the pilot wire, such as between transmit and receive modems. The modems transmit communication signals either continuously, without regard to the state of the PWM signal, or only when the PWM is in an off-state. If transmitting while PWM is on, the modem needs a large coupling impedance and/or a large signal injection. To transmit only when the PWM is off, the modem may use a blocking diode in the coupling circuit or may synchronize to the pulses in the PWM signal.
摘要翻译： 公开了用于在电动车辆服务设备（EVSE）和电动车辆（EV）之间的导线上通信的系统和方法。 EVSE和EV在导线上交换脉宽调制（PWM）信号，以控制EV的充电操作。 数据通信也可以在导线上传输，例如在发射和接收调制解调器之间。 调制解调器连续发送通信信号，而不考虑PWM信号的状态，或仅当PWM处于关闭状态时。 如果在PWM打开时发送，则调制解调器需要大的耦合阻抗和/或大的信号注入。 仅在PWM关闭时传输，调制解调器可以在耦合电路中使用阻塞二极管，或者可以与PWM信号中的脉冲同步。
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公开(公告)号：US08649443B2
公开(公告)日：2014-02-11
申请号：US12768676
申请日：2010-04-27
申请人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
发明人： Badri Varadarajan , Anand Dabak , Shu Du , Il Han Kim
IPC分类号： H04L25/00
CPC分类号： H04L27/2613
摘要： A device for communicating digital data over power lines includes a power line interface for transmitting data over at least one band of frequencies. An orthogonal frequency division multiplexing (OFDM) modulation unit generates OFDM symbols using a set of tones for the frequency band. A preamble generation unit generates preamble sequences for the frequency band by using the set of tones used by the OFDM modulation unit. The tones used by the preamble generation unit have a constant magnitude, and a set of phases obtained by quantizing to a small alphabet the phase of a set of tones obtained by taking an IFFT of a portion of a preamble used by a non-interoperable powerline access device. The device may transmit on two or more bands using a sampling frequency clock, wherein a lower band clock frequency is equal to or an integer divisor of a higher band clock frequency.
摘要翻译： 用于通过电力线传送数字数据的装置包括用于通过至少一个频带传送数据的电力线接口。 正交频分复用（OFDM）调制单元使用用于频带的一组音调来生成OFDM符号。 前导码生成单元通过使用由OFDM调制单元使用的音调集合来生成用于频带的前同步码序列。 由前置码生成单元使用的音调具有恒定的幅度，以及通过将非可互操作的电力线使用的前置部分的一部分的IFFT获得的一组音调的相位来量化到小的字母而获得的一组相位 访问设备 该装置可以使用采样频率时钟在两个或更多个频带上进行传输，其中较低频带时钟频率等于较高频带时钟频率的整数除数。
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公开(公告)号：US20120257639A1
公开(公告)日：2012-10-11
申请号：US13435862
申请日：2012-03-30
申请人： Kumaran Vijayasankar , Shu Du , Anand Dabak , Badri Varadarajan , Il Han Kim , Xiaolin Lu
发明人： Kumaran Vijayasankar , Shu Du , Anand Dabak , Badri Varadarajan , Il Han Kim , Xiaolin Lu
CPC分类号： H04B3/542 , H04L5/0007 , H04L5/0048 , H04L5/0053 , H04L5/0073
摘要： Systems and methods for designing, using, and/or implementing communications in beacon-enabled networks are described. In various implementations, these systems and methods may be applicable to power line communications (PLC). For example, a method may include identifying one of a plurality of orthogonal superframes. The identified superframe may include beacon slots and contention access period (CAP) slots. The beacon slots may follow a sequence of two or more frequency subbands, and the CAP slots may follow the same sequence of two or more frequency subbands. Also, the sequence of two or more frequency subbands may be distinct from other sequences of two or more frequency subbands followed by other beacon slots and CAP slots within others of the plurality of available superframes. The method may then include communicating with another device using the identified superframe.
摘要翻译： 描述了在启用信标的网络中设计，使用和/或实现通信的系统和方法。 在各种实现中，这些系统和方法可以应用于电力线通信（PLC）。 例如，方法可以包括识别多个正交超帧中的一个。 所识别的超帧可以包括信标时隙和竞争接入时隙（CAP）时隙。 信标时隙可以遵循两个或更多个频率子带的序列，并且CAP时隙可以遵循两个或更多个频率子带的相同序列。 而且，两个或多个频率子带的序列可以与两个或多个频率子带的其他序列不同，后面是多个可用超帧中的其他信标时隙和CAP时隙。 该方法然后可以包括使用所识别的超帧与另一设备进行通信。
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55.发明申请Method for Transmission of Unicast Control in Broadcast/Multicast Transmission Time Intervals 有权在广播/组播传输时间间隔内传输单播控制的方法公开(公告)号：US20120195246A1
公开(公告)日：2012-08-02
申请号：US13446492
申请日：2012-04-13
CPC分类号： H04W72/1289 , G06Q20/10 , G06Q30/00 , G06Q40/00 , H04L5/0048 , H04L5/0053 , H04L12/18 , H04L27/2601 , H04L27/2602 , H04N21/437 , H04N21/44209 , H04W52/322 , H04W72/005 , H04W72/1205 , H04W72/14
摘要： Embodiments of the invention provide methods for maximizing the bandwidth utilization in the uplink of a communication system supporting time division multiplexing between unicast and multicast/broadcast communication modes during transmission time intervals in the downlink of a communication system. This is accomplished by multiplexing at least unicast control signaling for UL scheduling assignments in TTIs supporting the multicast/broadcast communication mode. Moreover, multiplexing of unicast control signaling can also be accomplished by splitting a symbol of the multicast/broadcast TTI into two shorter symbols with the first of these two shorter symbols carrying at least unicast control signaling and the second of these shorter symbols carrying multicast/broadcast signaling.
摘要翻译： 本发明的实施例提供了一种用于在通信系统的下行链路中的传输时间间隔期间最大化在单播和多播/广播通信模式之间支持时分复用的通信系统的上行链路中的带宽利用率的方法。 这通过在支持多播/广播通信模式的TTI中多路复用至少用于UL调度分配的单播控制信令来实现。 此外，单播控制信令的复用也可以通过将多播/广播TTI的符号分成两个较短的符号来实现，其中这两个较短的符号中的第一个携带至少单播控制信令，并且这些较短的符号中的第二个携带多播/广播 信令。
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公开(公告)号：US20120002714A1
公开(公告)日：2012-01-05
申请号：US13163513
申请日：2011-06-17
申请人： Badri N. Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
发明人： Badri N. Varadarajan , Il Han Kim , Anand Dabak , Edward Mullins
IPC分类号： H03K7/08
CPC分类号： H03K7/08 , H04B3/54 , H04B2203/5416 , H04L25/4902
摘要： Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). The EVSE and EV exchange a Pulse Width Modulation (PWM) signal on the pilot wire to control charging operations of the EV. Data communications may also be transmitted on the pilot wire, such as between transmit and receive modems. The modems transmit communication signals either continuously, without regard to the state of the PWM signal, or only when the PWM is in an off-state. If transmitting while PWM is on, the modem needs a large coupling impedance and/or a large signal injection. To transmit only when the PWM is off, the modem may use a blocking diode in the coupling circuit or may synchronize to the pulses in the PWM signal.
摘要翻译： 公开了用于在电动车辆服务设备（EVSE）和电动车辆（EV）之间的导线上通信的系统和方法。 EVSE和EV在导线上交换脉宽调制（PWM）信号，以控制EV的充电操作。 数据通信也可以在导线上传输，例如在发射和接收调制解调器之间。 调制解调器连续发送通信信号，而不考虑PWM信号的状态，或仅当PWM处于关闭状态时。 如果在PWM打开时发送，则调制解调器需要大的耦合阻抗和/或大的信号注入。 仅在PWM关闭时传输，调制解调器可以在耦合电路中使用阻塞二极管，或者可以与PWM信号中的脉冲同步。
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公开(公告)号：US07660229B2
公开(公告)日：2010-02-09
申请号：US11424939
申请日：2006-06-19
IPC分类号： H04J11/00
CPC分类号： H04L1/06 , H04B7/0452 , H04B7/12 , H04L5/0007 , H04L5/0048 , H04L25/0226
摘要： Embodiments of the invention provide method and apparatus for generating a structure in an orthogonal frequency division multiplexing OFDM communication system having a transmitter with one or more transmitting antennas. The method includes composing a frame with a time domain and a frequency domain. The frame has a transmission time interval in the time domain and occupies a bandwidth in the frequency domain. The transmission time interval has multiple orthogonal frequency division multiplexing symbols. A pilot signal is located from a transmitting antenna into two non-consecutive orthogonal frequency division multiplexing symbols of the frame.
摘要翻译： 本发明的实施例提供了在具有一个或多个发射天线的发射机的正交频分复用OFDM通信系统中生成结构的方法和装置。 该方法包括组合具有时域和频域的帧。 该帧在时域中具有传输时间间隔并占据频域中的带宽。 传输时间间隔具有多个正交频分复用符号。 导频信号从发射天线位于帧的两个非连续正交频分复用符号中。
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公开(公告)号：US07184457B2
公开(公告)日：2007-02-27
申请号：US09792123
申请日：2001-02-23
IPC分类号： H04B1/00
CPC分类号： H04B1/7075 , H04B1/70757 , H04B1/709 , H04B1/7117 , H04B2001/70706
摘要： Spread spectrum rake receiver estimates number of paths within a chip interval and assigns corresponding fingers. Cross-correlation matrix eigenvalues or direct BER estimates for differing numbers of fingers determine whether one or two fingers assigned to the group of paths within a chip.
摘要翻译： 扩展频谱耙式接收机估计码片间隔内的路径数，并分配相应的手指。 用于不同数量手指的互相关矩阵特征值或直接BER估计确定分配给芯片内的一组路径的一个或两个手指。
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公开(公告)号：US20050237923A1
公开(公告)日：2005-10-27
申请号：US11115816
申请日：2005-04-26
申请人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
发明人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
CPC分类号： H04L27/2602 , H04B7/02
摘要： A transmitter 200 is provided. The transmitter 200 comprises a mapper 207 operable to map a bit stream into a plurality of tones to promote high data rate multi-band orthogonal frequency division multiplex communication, wherein the tones can take on sixteen or more different values 300. In another embodiment a communications system 1360 is provided that includes a transceiver 1362 that has two or more antennas 1394 and 1396. The transceiver 1362 transmits a first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode and receives a second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode. In another embodiment, a transceiver 200, 202 transmits a first multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands and receives a second multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands.
摘要翻译： 提供发射机200。 发射机200包括映射器207，其可操作以将比特流映射成多个音调以促进高数据速率多频带正交频分多路复用通信，其中音调可以具有十六个或更多个不同的值300.在另一个实施例中，通信 提供系统1360，其包括具有两个或多个天线1394和1396的收发机1362.收发机1362以多输入/多输出模式发送第一多频带正交频分多路复用信号，并接收第二多频带正交频分 多重输入/多输出模式下的多路复用信号。 在另一个实施例中，收发器200,202在多个子带上同时发送第一多频带正交频分复用符号，并且在多个子带上同时接收第二多频带正交频分复用符号。
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公开(公告)号：US20050111597A1
公开(公告)日：2005-05-26
申请号：US10659906
申请日：2003-09-11
申请人： Anand Dabak , Rohit Negi
发明人： Anand Dabak , Rohit Negi
CPC分类号： H04B7/0669 , H04L1/0065 , H04L1/0071 , H04L1/0618 , H04L1/0631
摘要： A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+τj), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+τj), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (αj1), a second estimate signal (αj2) and the first and second input signals. The correction circuit produces a first symbol estimate ({overscore (S)}1) in response to the first and second estimate signals and the first and second input signals. The correction circuit produces a second symbol estimate ({overscore (S)}2) in response to the first and second estimate signals and the first and second input signals.
摘要翻译： 移动通信系统被设计成具有耦合以接收第一多个信号（i = 0-N-1）的第一多个信号的输入电路， 在来自外部源的第一时间（T 0 -T 1）期间，并且被耦合以接收第二多个信号（r 1，j 2，...，i = N-2N-1）在来自外部源的第二时间（T 1 -T 2）期间。 输入电路沿着相应的第一和第二路径（j）接收第一和第二多个信号中的每一个。 输入电路产生第一输入信号（R SUB），第二输入信号（R SUB）和第二输入信号 ）从相应的第一和第二多个信号。 耦合校正电路以接收第一估计信号（第一估计信号），第二估计信号（α2，j 2， / SUP>）和第一和第二输入信号。 所述校正电路响应于所述第一和第二估计信号以及所述第一和第二输入信号产生第一符号估计（{overcore（S SUB> 1）），所述校正电路产生第二符号估计（{overscore （S SUB2）响应于第一和第二估计信号以及第一和第二输入信号。
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