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1. 发明授权

US5850392A Spread spectrum random access systems and methods for time division multiple access radiotelephone communication systems 失效
标题翻译：用于时分多址无线电话通信系统的扩频随机接入系统和方法
公开(公告)号：US5850392A
公开(公告)日：1998-12-15
申请号：US629497
申请日：1996-04-10
申请人： Yi-Pin Eric Wang , Amer Hassan , Stanley L. Reinhold , Larry W. Massingill
发明人： Yi-Pin Eric Wang , Amer Hassan , Stanley L. Reinhold , Larry W. Massingill
IPC分类号： H04Q7/38 , H04B7/185 , H04B7/212 , H04B7/216 , H04J13/02
CPC分类号： H04B7/216 , H04B7/212
摘要： In a time division multiple access (TDMA) radiotelephone communications system, a spread spectrum random access channel signal representing a random access message is communicated from a radiotelephone to a central station according to a spreading sequence. In response, a TDMA radiotelephone communications channel is assigned to the radiotelephone. A time division multiplexed radiotelephone communications signal is communicated between the radiotelephone and the central station on the assigned TDMA radiotelephone communications channel over a time division multiplexed carrier frequency band. Preferably, in communicating the spread spectrum random access channel signal, a random access channel signal, representing the random access channel message, is direct sequence modulated according to the spreading sequence to produce a direct sequence modulated random access channel signal. According to a two-stage detection aspect, a synchronization sequence may be associated with a plurality of spreading sequences. The synchronization sequence may be first detected from the communicated spread spectrum random access channel signal, and in response to detection of the synchronization sequence, one of the plurality of spreading sequences associated with the detected synchronization sequence may be detected. A station identification may be assigned to the radiotelephone, with the station identification preferably represented by a digital station identification word. The synchronization sequence and the spreading sequence may be identified from the station identification word, thus associating the synchronization and spreading sequences. The spreading sequence may also be randomly generated from the station identification word.
摘要翻译：在时分多址（TDMA）无线电话通信系统中，根据扩展序列将表示随机接入消息的扩频随机接入信道信号从无线电话传送到中心站。作为响应，TDMA无线电话通信信道被分配给无线电话。时分复用无线电话通信信号通过时分复用载波频带在分配的TDMA无线电话通信信道上的无线电话与中心站之间进行通信。优选地，在传播扩频随机接入信道信号中，表示随机接入信道消息的随机接入信道信号根据扩展序列被直接序列调制以产生直接序列调制的随机接入信道信号。根据两级检测方面，同步序列可以与多个扩展序列相关联。可以首先从通信的扩展频谱随机接入信道信号检测同步序列，并且响应于同步序列的检测，可以检测与所检测到的同步序列相关联的多个扩展序列之一。站标识可以分配给无线电话机，其中站标识优选地由数字站识别字表示。可以从站识别字识别同步序列和扩展序列，从而使同步和扩展序列相关联。扩展序列也可以从站识别字随机生成。

2. 发明授权

US5796726A Systems and methods for random access in time division multiple access satellite radiotelephone communications 失效
标题翻译：用于时分多址卫星无线电话通信的随机接入系统和方法
公开(公告)号：US5796726A
公开(公告)日：1998-08-18
申请号：US629358
申请日：1996-04-08
申请人： Amer Hassan , Rajaram Ramesh , Stanley L. Reinhold , Larry W. Massengill , Yi-Pin Eric Wang
发明人： Amer Hassan , Rajaram Ramesh , Stanley L. Reinhold , Larry W. Massengill , Yi-Pin Eric Wang
IPC分类号： H04J3/00 , H04B7/15 , H04B7/204 , H04B7/208 , H04B7/212 , H04W74/08 , H04B7/185 , H04T4/00
CPC分类号： H04B7/212 , H04W74/0866
摘要： In a time division multiple access (TDMA) satellite radiotelephone communications system, a radiotelephone communicates random access channel radiotelephone communications signals to a satellite over a dedicated random access channel uplink carrier frequency band. In response, a time division multiple access channel on a time division multiplexed uplink carrier frequency band different from the dedicated random access channel uplink carrier frequency band is assigned. The radiotelephone communicates time division multiplexed radiotelephone communications signals to the satellite over the allocated time division multiple access channel. Random access channel radiotelephone communications signals may be communicated to the satellite from a first radiotelephone over a first dedicated random access channel uplink carrier frequency band or from a second radiotelephone over a second dedicated random access channel uplink carrier frequency band different from said first dedicated random access channel uplink carrier frequency band. For a system in which the satellite communicates radiotelephone communications signals to radiotelephones located in a first coverage area and communicates radiotelephone communications signals to radiotelephones located in a second coverage area, random access channel radiotelephone communications signals may be communicated over a first dedicated random access uplink carrier frequency band if the radiotelephone is located in the first coverage area or communicating random access radiotelephone communications signals over a second dedicated random access channel uplink carrier frequency band different from the first dedicated random access uplink carrier band if the radiotelephone is located in the second coverage area.
摘要翻译：在时分多址（TDMA）卫星无线电话通信系统中，无线电话机通过专用随机接入信道上行链路载波频带将随机接入信道无线电话通信信号传送到卫星。作为响应，分配与专用随机接入信道上行链路载波频带不同的时分多路复用上行链路载波频带上的时分多址信道。无线电话机通过分配的时分多址信道将时分复用无线电话通信信号传送到卫星。随机接入信道无线电话通信信号可以通过第一专用随机接入信道上行链路载波频带从第一无线电话机传送到卫星，或者可以通过与所述第一专用随机接入不同的第二专用随机接入信道上行链路载波频带从第二无线电话机传送信道上行载波频带。对于其中卫星将无线电话通信信号传送到位于第一覆盖区域中的无线电话机并将无线电话通信信号传送到位于第二覆盖区域中的无线电话机的系统，随机接入信道无线电话通信信号可以通过第一专用随机接入上行链路载波如果无线电话机位于第一覆盖区域或者如果无线电话机位于第二覆盖区域中，则通过与第一专用随机接入上行链路载波频带不同的第二专用随机接入信道上行链路载波频带来传送随机接入无线电话通信信号。

3. 发明授权

US09253783B2 Management of uplink resources in multi-carrier CDMA system 有权
标题翻译：多载波CDMA系统上行资源管理
公开(公告)号：US09253783B2
公开(公告)日：2016-02-02
申请号：US13403683
申请日：2012-02-23
申请人： Yi-Pin Eric Wang , Anders Wallén , Stephen Grant
发明人： Yi-Pin Eric Wang , Anders Wallén , Stephen Grant
IPC分类号： H04W72/04
CPC分类号： H04W72/0486 , H04W72/0453
摘要： The method an apparatus described herein manages uplink resources to increase spectral efficiency and system capacity. According to one embodiment of the present invention, a base station may be assigned two or more downlink carriers for downlink transmission and two or more corresponding uplink carriers. In a multi-carrier mode, the base station may transmit signals on two or more downlink carriers to the same mobile terminal, and receive signals from the mobile terminal on one of the paired uplink terminals. The uplink carriers can be operated at different interference levels and the uplink traffic can be divided between the available uplink carriers based on the type of traffic and/or data transmission parameters. The mobile terminals may also be allowed to switch between the uplink carriers to improve overall efficiency.
摘要翻译：本文描述的装置的方法管理上行链路资源以提高频谱效率和系统容量。根据本发明的一个实施例，可以为基站分配用于下行链路传输的两个或更多个下行链路载波和两个或更多个对应的上行链路载波。在多载波模式中，基站可以在两个或多个下行链路载波上发送信号到同一个移动终端，并且在一个上行链路终端中的一个上接收来自移动终端的信号。上行链路载波可以以不同的干扰级别操作，并且可以基于业务类型和/或数据传输参数在可用的上行链路载波之间划分上行链路业务。还可以允许移动终端在上行链路载波之间切换以提高整体效率。

4. 发明授权

US08761323B2 Impairment covariance and combining weight updates during iterative turbo interference cancellation reception 有权
标题翻译：减弱协方差，并在迭代涡轮干扰消除接收期间组合权重更新
公开(公告)号：US08761323B2
公开(公告)日：2014-06-24
申请号：US13333478
申请日：2011-12-21
申请人： Yi-Pin Eric Wang , Gregory Bottomley , Jung-Fu Cheng , Stephen Grant , Ning He , Niklas Johansson , Cagatay Konuskan
发明人： Yi-Pin Eric Wang , Gregory Bottomley , Jung-Fu Cheng , Stephen Grant , Ning He , Niklas Johansson , Cagatay Konuskan
IPC分类号： H04B1/10
CPC分类号： H04W72/1278 , H04B1/71075 , H04B1/712 , H04W72/082
摘要： In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver are adapted to reflect the updated impairment covariance.
摘要翻译：在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。在干扰消除的每个阶段之后，干扰特性发生变化。使用自适应策略，其中在干扰消除的每个阶段之后，对损伤协方差进行参数更新，并且接收机的组合权重被适配以反映更新的损害协方差。

5. 发明授权

US08743987B2 Symbol detection for alleviating inter-symbol interference 失效
标题翻译：用于缓解符号间干扰的符号检测
公开(公告)号：US08743987B2
公开(公告)日：2014-06-03
申请号：US13050210
申请日：2011-03-17
申请人： Yi-Pin Eric Wang
发明人： Yi-Pin Eric Wang
IPC分类号： H04L27/06 , H04L27/01 , H04B1/10
CPC分类号： H04L25/08 , H04L25/03012 , H04L25/03159 , H04L25/03171 , H04L25/03184 , H04L25/03312 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： A receiver is configured to perform symbol detection based on a total frequency domain received signal that comprises contribution from a block of time domain symbols. The receiver comprises electronic circuitry operate to divide the block into plural sub-blocks, and for each sub-block, to jointly detect the symbols of the sub-block while treating symbols of the block which are outside of the sub-block as noise.
摘要翻译：接收机被配置为基于包括来自时域符号块的贡献的总频域接收信号执行符号检测。接收机包括电子电路，用于将块划分为多个子块，并且对于每个子块，共同检测子块的符号，同时将处于子块外部的块的符号作为噪声进行处理。

6. 发明授权

US08724741B2 Signal quality estimation from coupling matrix 有权
标题翻译：耦合矩阵的信号质量估计
公开(公告)号：US08724741B2
公开(公告)日：2014-05-13
申请号：US12572680
申请日：2009-10-02
申请人： Gregory E. Bottomley , Yi-Pin Eric Wang
发明人： Gregory E. Bottomley , Yi-Pin Eric Wang
IPC分类号： H04L27/00 , H04L27/06 , H03D1/06
CPC分类号： H04B17/309 , H04B17/26 , H04L2025/03426
摘要： The quality of a received signal in a non-linear receiver is estimated using a coupling matrix G or Q that describes the interaction of symbols in the received signal with other symbols and/or how the impairment (noise and interference) interacts in the received signal. The coupling matrix is also useful for joint detection. The signal quality estimate may include, e.g., the minimum eigenvalue, and other functions, such as the determinant and trace of the coupling matrix. When G or Q varies with each block, as in CDMA systems employing longcode scrambling, a representative matrix can be used, such as a matrix of RMS values or average magnitudes of real and imaginary components. The signal quality estimate can be expressed as a bit error rate (BER).
摘要翻译：使用描述接收信号中的符号与其他符号的相互作用和/或接收信号中的损害（噪声和干扰）如何相互作用的耦合矩阵G或Q来估计非线性接收机中的接收信号的质量。耦合矩阵对于联合检测也是有用的。信号质量估计可以包括例如最小特征值和其他函数，诸如耦合矩阵的行列式和轨迹。当G或Q随每个块变化时，如在使用长码扰码的CDMA系统中，可以使用代表性矩阵，例如RMS值矩阵或实部和虚部分量的平均幅度。信号质量估计可以表示为误码率（BER）。

7. 发明授权

US08718199B2 Frequency-domain multi-stage group detection for alleviating inter-symbol interference 有权
标题翻译：用于减轻符号间干扰的频域多级组检测
公开(公告)号：US08718199B2
公开(公告)日：2014-05-06
申请号：US13050433
申请日：2011-03-17
申请人： Yi-Pin Eric Wang , Gregory E. Bottomley
发明人： Yi-Pin Eric Wang , Gregory E. Bottomley
IPC分类号： H04L27/06
CPC分类号： H04L25/08 , H04L25/03012 , H04L25/03159 , H04L25/03171 , H04L25/03184 , H04L25/03312 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： A receiver comprises plural receive antennas and electronic circuitry. The plural receive antennas are configured to receive, on plural subcarriers transmitted over a radio interface, a frequency domain signal that comprises contribution from a block of time domain symbols. The electronic circuitry is configured or operable to perform symbol detection of time domain symbols comprising the block by performing a multi-stage joint detection procedure comprising plural stages, and thus serves as a detector (40). For a first stage the block is divided into a first number of sub-blocks each having a sub-block first size. For a second stage the block is divided into a second number of sub-blocks each having a sub-block second size, the sub-block second size being greater than the sub-block first size. For each stage a detector (40) formulates frequency domain combining weights and uses the frequency domain combining weights for combining multiple receive versions of each subcarrier to provide candidate symbol combination values for symbols in each sub-block of the respective stage. For the second stage the detector (40) is further configured to use the candidate symbol combination values of the first stage to formulate joint hypotheses to serve as candidates for the joint detection operation of the second stage.
摘要翻译：接收机包括多个接收天线和电子电路。多个接收天线被配置为在由无线电接口发送的多个子载波上接收包括来自时域符号块的贡献的频域信号。电子电路被配置或可操作以通过执行包括多个级的多级联合检测过程来执行包括该块的时域符号的符号检测，从而用作检测器（40）。对于第一阶段，块被分成具有子块第一大小的第一数量的子块。对于第二级，块被分成第二数量的子块，每个子块具有子块的第二尺寸，子块的第二尺寸大于子块的第一尺寸。对于每个阶段，检测器（40）制定频域组合权重并使用频域组合权重来组合每个子载波的多个接收版本，以为相应级的每个子块中的符号提供候选符号组合值。对于第二级，检测器（40）还被配置为使用第一级的候选符号组合值来形成联合假设以用作第二级的联合检测操作的候选。

8. 发明申请

US20140029650A1 Adaptive Precoder Cycling 有权
标题翻译：自适应预编码器循环
公开(公告)号：US20140029650A1
公开(公告)日：2014-01-30
申请号：US13557306
申请日：2012-07-25
申请人： Chester Sungchung Park , Yi-Pin Eric Wang
发明人： Chester Sungchung Park , Yi-Pin Eric Wang
IPC分类号： H04L29/02 , H04B1/38
CPC分类号： H04B7/0456 , H04B7/0604
摘要： Methods and apparatus are disclosed for improving a precoder selection process in a wireless communications system. In a normal precoder selection process, a precoder is selected from a codebook based on channel state information estimated from received reference signals. In between two received reference signals, a subset of precoders is cycled through and each precoder in the subset is iteratively selected for use by a transmitter to precode transmit signals. The subset of precoders may be adaptively modified based on predefined criteria.
摘要翻译：公开了用于改进无线通信系统中的预编码器选择过程的方法和装置。在通常的预编码器选择处理中，基于从接收到的参考信号估计的信道状态信息，从码本中选择预编码器。在两个接收到的参考信号之间，预编码器的子集被循环遍历并且子集中的每个预编码器被迭代地选择以供发射机用于对发射信号进行预编码。预编码器的子集可以基于预定标准自适应地修改。

9. 发明申请

US20130301686A1 Chip-Level Processing for Joint Demodulation in CDMA Receivers 有权
标题翻译： CDMA接收机联合解调的芯片级处理
公开(公告)号：US20130301686A1
公开(公告)日：2013-11-14
申请号：US13468680
申请日：2012-05-10
申请人： Andres Reial , Stephen Grant , Michael Samuel Bebawy , Yi-Pin Eric Wang
发明人： Andres Reial , Stephen Grant , Michael Samuel Bebawy , Yi-Pin Eric Wang
IPC分类号： H04B1/7105
CPC分类号： H04B1/7105 , H04B1/7097 , H04B1/71052 , H04B1/71057 , H04L25/03331
摘要： A CDMA multi-code joint demodulation solution in which impairment suppression and channel matching operations are performed prior to despreading. Embodiments include a linear front end that performs chip-level suppression of signal components that are not included in a subsequent joint demodulation process. The pre-processing stage also carries out metric preparation and provides a vector decision statistic that is processed by a joint demodulation stage to extract per-code soft values for the symbols of interest in the received signal. Both code-specific and code-averaged versions of the linear processing are disclosed, as are several front-end configurations with equivalent performance, but different complexity trade-offs. These new approaches use a block formulation, requiring a set of input chip samples as an input, and perform all operations as matrix-vector multiplications, which is an approach amenable to efficient DSP or hardware implementation.
摘要翻译：一种CDMA解码解码方案，其中在解扩之前执行损伤抑制和信道匹配操作。实施例包括执行不包括在随后的联合解调处理中的信号分量的芯片级抑制的线性前端。预处理阶段还执行度量准备，并提供由联合解调级处理以提取接收信号中感兴趣符号的每码软值的向量决策统计量。公开了线性处理的代码特定和代码平均版本，以及具有相同性能但是不同复杂性权衡的若干前端配置。这些新方法使用块公式，需要一组输入芯片样本作为输入，并执行所有操作作为矩阵向量乘法，这是一种适合高效DSP或硬件实现的方法。

10. 发明申请

US20130279559A1 Method and Apparatus for Soft Symbol Processing in a Communication Receiver 有权
标题翻译：通信接收机中软符号处理的方法和装置
公开(公告)号：US20130279559A1
公开(公告)日：2013-10-24
申请号：US13454919
申请日：2012-04-24
申请人： Michael Samuel Bebawy , Fredrik Huss , Yi-Pin Eric Wang
发明人： Michael Samuel Bebawy , Fredrik Huss , Yi-Pin Eric Wang
IPC分类号： H04B1/10 , H04L27/01 , H04L27/00
CPC分类号： H04L25/03012 , H04L1/005 , H04L25/03171 , H04L25/0328 , H04L27/38
摘要： In one aspect, the present invention improves Turbo equalization and/or soft interference cancellation processing in communication receivers by providing an efficient and accurate technique to compute the second moment of a received symbol, e.g., an interfering symbol, as a function of the expected bit values of only those bits in the symbol that are magnitude-controlling bits according to a defined modulation constellation. Advantageously, the expected bit values in at least one embodiment are computed using a LUT that maps bit LLRs to corresponding hyperbolic tangent function values. Further, the expected symbol value is computed as a linear function of terms comprising the expected bit values and the soft symbol variance is efficiently computed from the second moment and the expected symbol value squared. This simplified processing reduces receiver complexity, particularly in the context of modulation constellations having non-constant magnitudes, and thus saves power and/or improves design economics.
摘要翻译：在一个方面，本发明通过提供有效和准确的技术来计算接收符号的第二时刻（例如干扰符号）来改善通信接收机中的Turbo均衡和/或软干扰消除处理，作为预期位的函数根据定义的调制星座，只有符号中那些位是幅度控制位的值。有利地，使用将位LLR映射到对应的双曲正切函数值的LUT来计算至少一个实施例中的预期位值。此外，预期符号值被计算为包括预期位值的项的线性函数，并且从第二时刻有效地计算软符号方差，并且预期符号值平方。这种简化的处理降低了接收机的复杂度，特别是在具有非恒定幅度的调制星座的上下文中，从而节省功率和/或提高了设计经济性。

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