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1. 发明申请

WO2008144151A2 MULTI-ANTENNA TRANSMITTER FOR MULTI-TONE SIGNALING 审中-公开
标题翻译：用于多音信号的多天线发射机
公开(公告)号：WO2008144151A2
公开(公告)日：2008-11-27
申请号：PCT/US2008/061117
申请日：2008-04-22
申请人： RAMBUS INC. , ABBASFAR, Aliazam , KOMIJANI, Abbas
发明人： ABBASFAR, Aliazam , KOMIJANI, Abbas
IPC分类号： H04L27/26 , H04B7/06
CPC分类号： H04B7/06 , H04L27/2614 , H04L27/2628
摘要： Embodiments of a communication circuit are described. This communication circuit includes an input node to receive a set of data symbols and a partitioner coupled to the input node. This partitioner is to divide the set of data symbols into M irregular subgroups of data symbols, a given one of which includes non-consecutive data symbols in the set of data symbols. Moreover, this given irregular subgroup of data symbols includes at least two pairs of adjacent data symbols having different inter-data- symbol spacings in the set of data symbols. This communication circuit also includes M modulators coupled to the partitioner, where the given irregular subgroup of data symbols is coupled to a given modulator in the M modulators. Furthermore, the communication circuit includes M output nodes, where a given output node in the M output nodes is coupled to the given modulator and is to couple to an antenna element in M antenna elements.
摘要翻译：描述通信电路的实施例。该通信电路包括用于接收一组数据符号的输入节点和耦合到输入节点的分割器。该分割器将数据符号组划分成M个不规则的数据符号子组，其中一个给定的数据符号包括该组数据符号中的非连续的数据符号。此外，该给定的不规则的数据符号子组包括在该组数据符号中具有不同的数据间符号间隔的至少两对相邻的数据符号。该通信电路还包括耦合到分割器的M个调制器，其中给定的不规则子组的数据符号耦合到M个调制器中的给定调制器。此外，通信电路包括M个输出节点，其中M个输出节点中的给定输出节点耦合到给定的调制器，并且耦合到M个天线元件中的天线元件。

2. 发明申请

WO2008147908A1 A MULTI-ANTENNA BEAM-FORMING SYSTEM FOR TRANSMITTING CONSTANT ENVELOPE SIGNALS DECOMPOSED FROM A VARIABLE ENVELOPE SIGNAL 审中-公开
标题翻译：用于传输由可变信封信号分解的恒定信号的多天线波束形成系统
公开(公告)号：WO2008147908A1
公开(公告)日：2008-12-04
申请号：PCT/US2008/064572
申请日：2008-05-22
申请人： RAMBUS INC. , KOMIJANI, Abbas , ABBASFAR, Aliazam
发明人： KOMIJANI, Abbas , ABBASFAR, Aliazam
IPC分类号： H03F1/02 , H03F1/32 , H04B7/06
CPC分类号： H04B7/0682 , H03F1/0294 , H03F3/24 , H04B2001/0408
摘要： Embodiments in the present disclosure pertain to a multi-antenna beam-forming system for transmitting constant envelope signals decomposed from a variable envelope signal. The variable envelope signal is decomposed into two constant envelope signals. Each of the constant envelope signals are separately amplified by power amplifiers and transmitted over separate antennas. Beam steering delays can be added to the transmit paths of the constant envelope signals to direct the beam to the location of a receiver. The transmitted constant envelope signals combine through spatial out-phasing such that a receiving antenna receives a variable envelope signal.
摘要翻译：本公开的实施例涉及用于发送从可变包络信号分解的恒定包络信号的多天线波束形成系统。可变包络信号被分解成两个恒定包络信号。每个恒定包络信号由功率放大器单独放大并通过单独的天线发射。光束转向延迟可以被添加到恒定包络信号的发射路径，以将光束引导到接收器的位置。所发送的恒定包络信号通过空间外相结合，使得接收天线接收可变包络信号。

3. 发明申请

WO2009055146A1 ENCODING AND DECODING TECHNIQUES WITH IMPROVED TIMING MARGIN 审中-公开
标题翻译：编码和解码技术与改进的时序标记
公开(公告)号：WO2009055146A1
公开(公告)日：2009-04-30
申请号：PCT/US2008/074752
申请日：2008-08-29
申请人： RAMBUS INC. , ABBASFAR, Aliazam
发明人： ABBASFAR, Aliazam
IPC分类号： H04L25/49 , H04L7/04
CPC分类号： H04L25/4908 , H04L7/041
摘要： Embodiments of an encoder and a decoder are described. The encoder encodes data into a series of parallel codewords. Each codeword is expressed two sets of logic values (e.g., a set of logic 0s and a set of logic 1s) on two corresponding sets of output nodes, a first set and a second set. The encoder selects a current codeword such that it differs from the immediately preceding codeword by a fixed number of zero-to-one transitions on the first set of nodes and a fixed number of one-to-zero transitions on the second set of nodes. A decoder receives and decodes the codewords by comparing symbols on node pairs for which the symbols expressed in the prior code word were alike and decoding the results of those comparisons.
摘要翻译：描述了编码器和解码器的实施例。编码器将数据编码成一系列并行码字。每个码字在两个对应的输出节点组，第一组和第二组上表示两组逻辑值（例如，一组逻辑0和一组逻辑1）。编码器选择当前码字，使得其与紧接在前的码字不同，第一组节点上的固定数量的零到一个转换和第二组节点上的固定数量的一到零转换。解码器通过比较在先前代码字中表示的符号相似的节点对上的符号并对这些比较的结果进行解码来接收和解码码字。

4. 发明申请

WO2009023302A3 COMMUNICATION USING CONTINUOUS-PHASE MODULATED SIGNALS 审中-公开
公开(公告)号：WO2009023302A3
公开(公告)日：2009-02-19
申请号：PCT/US2008/061846
申请日：2008-04-29
申请人： RAMBUS INC. , ABBASFAR, Aliazam , ARYANFAR, Farshid
发明人： ABBASFAR, Aliazam , ARYANFAR, Farshid
IPC分类号： H04L27/20 , H04L27/22 , H04B7/04 , H04B7/06 , H04B7/08
摘要： Embodiments of a circuit are described. In this circuit, a modulation circuit provides a first modulated electrical signal and a second modulated electrical signal, where a given modulated electrical signal, which can be either the first modulated electrical signal or the second modulated electrical signal, includes minimum-shift keying (MSK) modulated data. Moreover, a first phase-adjustment element, which is coupled to the modulation circuit, sets a relative phase between the first modulated electrical signal and the second modulated electrical signal based on a phase value of the first phase-adjustment element. Additionally, an output interface, which is coupled to the first phase-adjustment element, is coupled to one or more antenna elements which output signals. These signals include a quadrature phase-shift-keying (QPSK) signal corresponding to the first modulated electrical signal and the second modulated electrical signal.

5. 发明申请

WO2011119359A2 CODED DIFFERENTIAL INTERSYMBOL INTERFERENCE REDUCTION 审中-公开
标题翻译：编码差分干扰减少
公开(公告)号：WO2011119359A2
公开(公告)日：2011-09-29
申请号：PCT/US2011/028295
申请日：2011-03-14
申请人： RAMBUS INC. , AMIRKHANY, Amir , ABBASFAR, Aliazam , KAVIANI, Kambiz , BEYENE, Wendemagegnehu , WERNER, Carl, W.
发明人： AMIRKHANY, Amir , ABBASFAR, Aliazam , KAVIANI, Kambiz , BEYENE, Wendemagegnehu , WERNER, Carl, W.
IPC分类号： G11C7/10
CPC分类号： G11C7/1006 , G11C7/02
摘要： Encoder and decoder circuits that encode and decode a series of data words to/from a series of code words. The data words include L symbols. The code words include M symbols, where M is larger than L. A set of tightly coupled M links to convey respective symbols in each of the series of code words. The code words are selected such that between every two consecutive code words in a series of code words, an equal number of transitions from low to high and high to low occur on a subset of the M-links.
摘要翻译：编码器和解码器电路，用于对一系列代码字进行编码和解码一系列数据字。数据字包括L个符号。代码字包括M个符号，其中M大于L.一组紧密耦合的M个链路，用于传送一系列码字中的每一个中的相应符号。选择码字使得在一系列码字中的每两个连续码字之间，在M链路的子集上出现从低到高和高到低的相等数量的转换。

6. 发明申请

WO2009108562A2 CODE-ASSISTED ERROR-DETECTION TECHNIQUE 审中-公开
标题翻译：编码辅助错误检测技术
公开(公告)号：WO2009108562A2
公开(公告)日：2009-09-03
申请号：PCT/US2009/034486
申请日：2009-02-19
申请人： RAMBUS INC. , ABBASFAR, Aliazam
发明人： ABBASFAR, Aliazam
IPC分类号： H03M13/00
CPC分类号： G06F11/08 , G06F11/0793 , G06F11/1004
摘要： Embodiments of a circuit are described. In this circuit, an encoder circuit encodes a set of N symbols as a given codeword in a code space, where the given codeword includes a set of M symbols. M drivers are coupled to the encoder circuit and are coupled to M links in a channel, where a given driver outputs a given symbol in the set of M symbols onto a given link. Moreover, an error-detection circuit, which is coupled to the encoder circuit, generates and stores error-detection information associated with the set of M symbols, where the error- detection information facilitates subsequent probabilistic determination of a type of error during communication of the set of M symbols to another circuit. Additionally, a receiver circuit receives feedback information from the other circuit. This feedback information includes error information about detection of another type of error in the set of M symbols based on characteristics of the code space. Furthermore, control logic performs remedial action based on the feedback information.
摘要翻译：描述了电路的实施例。在该电路中，编码器电路将一组N字符编码为代码空间中的给定码字，其中该给定码字包括一组M symbols个符号。 M个驱动器耦合到编码器电路并且耦合到通道中的M个链路，其中给定的驱动器输出该组M中的给定符号，我>符号到给定的链接。此外，耦合到编码器电路的错误检测电路产生并存储与该组M个符号相关的错误检测信息，其中错误检测信息有助于后续的概率性确定在将该组M个符号传送到另一个电路期间的错误类型。另外，接收器电路从另一个电路接收反馈信息。该反馈信息包括关于根据代码空间的特征检测该组符号中的另一种类型的错误的错误信息。此外，控制逻辑基于反馈信息执行补救行动。

7. 发明申请

WO2008147910A1 ADAPTIVE-GAIN TRANSMITTER 审中-公开
标题翻译：自适应增益变送器
公开(公告)号：WO2008147910A1
公开(公告)日：2008-12-04
申请号：PCT/US2008/064574
申请日：2008-05-22
申请人： RAMBUS INC. , ABBASFAR, Aliazam
发明人： ABBASFAR, Aliazam
IPC分类号： H04L27/26
CPC分类号： H04L27/2614
摘要： A communication circuit includes an input node to receive two adjacent blocks of data symbols. A modulator, coupled to the input node, encodes these blocks of data symbols using an encoding technique into corresponding encoded data symbols. Moreover, a detector is coupled to the modulator. This detector determines peak values for each of the encoded data symbols. Furthermore, an amplifier is coupled to the detector, and an output node is coupled to the amplifier. This amplifier amplifies a given encoded data symbol in the encoded data symbols using an associated symbol-dependent gain prior to transmitting this encoded data symbol. Note that the associated symbol-dependent gain is based on an peak value associated with the given encoded data symbol.
摘要翻译：通信电路包括用于接收数据符号的两个相邻块的输入节点。耦合到输入节点的调制器使用编码技术将这些数据符号块编码成对应的编码数据符号。此外，检测器耦合到调制器。该检测器确定每个编码数据符号的峰值。此外，放大器耦合到检测器，并且输出节点耦合到放大器。该放大器在发送该编码数据符号之前使用相关联的符号依赖增益放大编码数据符号中的给定编码数据符号。注意，相关联的符号相关增益基于与给定编码数据符号相关联的峰值。

8. 发明申请

WO2007127861A2 WIDEBAND CIRCUIT CHARACTERIZATION 审中-公开
标题翻译：宽带电路特性
公开(公告)号：WO2007127861A2
公开(公告)日：2007-11-08
申请号：PCT/US2007/067536
申请日：2007-04-26
申请人： RAMBUS INC. , THE BOARD OF TRUSTEES OF THE UNIVERSITY OF THE LELAND STANFORD JUNIOR UNIVERSITY , ABBASFAR, Aliazam , AMIRKHANY, Amir , SAVOJ, Jafar
发明人： ABBASFAR, Aliazam , AMIRKHANY, Amir , SAVOJ, Jafar
IPC分类号： G06F15/00
CPC分类号： G06F17/5036
摘要： In a method of characterizing a circuit, a test sequence is provided. A response of the circuit to the test sequence is determined. A transfer function that corresponds to the response is determined. The transfer function is decomposed into a plurality of terms. A respective term corresponds to an nth-order term in an expansion of at least 3rd order that corresponds to the transfer function. A characteristic associated with the circuit is simulated using at least one of the terms in the plurality of terms.
摘要翻译：在表征电路的方法中，提供测试序列。确定电路对测试序列的响应。确定与响应对应的传递函数。传递函数被分解为多个项。相应的术语对应于对应于传递函数的至少3阶的扩展中的n阶项。使用多个术语中的至少一个术语来模拟与电路相关联的特性。

9. 发明申请

WO2010014358A3 METHOD AND SYSTEM FOR BALANCING RECEIVE-SIDE SUPPLY LOAD 审中-公开
公开(公告)号：WO2010014358A3
公开(公告)日：2010-02-04
申请号：PCT/US2009/049813
申请日：2009-07-07
申请人： RAMBUS INC. , ABBASFAR, Aliazam
发明人： ABBASFAR, Aliazam
IPC分类号： G06F13/40 , H03K19/00
摘要： Described are digital communication systems that transmit and receive parallel sets of data symbols. Differences between successive sets of symbols induce changes in the current used to express the symbol sets, and thus introduce supply ripple. A receiver adds compensation current to reduce supply ripple. The compensation current is calculated based upon prior data samples rather than the current symbols, and consequently increases the maximum instantaneous current fluctuations between adjacent symbol sets as compared with circuits that do not include the compensation. The frequency response of the power-distribution network filters out the increased data dependence of the local supply current, however, and consequently reduces the fluctuations of total supply current. Some embodiments provide compensation currents for both transmitted and received symbols.

10. 发明申请

WO2013039624A1 OFFSET AND DECISION FEEDBACK EQUALIZATION CALIBRATION 审中-公开
标题翻译：偏差和决策反馈均衡校准
公开(公告)号：WO2013039624A1
公开(公告)日：2013-03-21
申请号：PCT/US2012/050407
申请日：2012-08-10
申请人： RAMBUS INC. , KAVIANI, Kambiz , AMIRKHANY, Amir , WEI, Jason Chia-jen , ABBASFAR, Aliazam
发明人： KAVIANI, Kambiz , AMIRKHANY, Amir , WEI, Jason Chia-jen , ABBASFAR, Aliazam
IPC分类号： H04L27/01 , H04B1/04 , H04B1/12
CPC分类号： H04L25/03057 , H04B1/123 , H04L25/03063 , H04L25/03885
摘要： A decision feedback equalizer is calibrated to compensate for estimated inter- symbol interference in a received signal and offsets of sampling devices. The decision feedback equalizer is configured so that an output signal of a sampling circuit represents a comparison between an input signal and a reference of the sampling circuit under calibration. An input signal is received over a communication channel that includes a predetermined pattern. The predetermined pattern is compared to the output signal to determine an adjusted reference for configuring the sampling circuit that accounts for both offset and inter-symbol interference effects.
摘要翻译：校准反馈均衡器以补偿接收信号中的估计符号间干扰和采样设备的偏移。判定反馈均衡器被配置为使得采样电路的输出信号表示在校准下的输入信号和采样电路的基准之间的比较。在包括预定图案的通信信道上接收输入信号。将预定模式与输出信号进行比较，以确定用于配置考虑到偏移和符号间干扰效应两者的采样电路的调整参考。

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