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公开(公告)号：US07221958B2
公开(公告)日：2007-05-22
申请号：US10021378
申请日：2001-12-12
IPC分类号： H04M1/00
CPC分类号： H03H17/0225
摘要： A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA signal caused GSM radio transmissions.
摘要翻译： 延迟和加法滤波技术基本上在相对宽带接收信号中的窄带干扰点处定位一个或多个滤波器零点。 例如，该技术在去除所接收到的W-CDMA信号造成的GSM无线电传输中的相邻信道干扰方面是有用的。
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2.发明授权公开(公告)号：US07539240B2
公开(公告)日：2009-05-26
申请号：US10800167
申请日：2004-03-12
IPC分类号： H04B15/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： Exemplary received signal processing may be based on maintaining a model of received signal impairment correlations, wherein each term of the model is updated periodically or as needed based on measuring impairments for a received signal of interest. An exemplary model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameters. The model terms may be maintained based on current channel estimates and delay information and may be fitted to measured impairment by adapting the model fitting parameters based on the measured impairment. The modeled received signal impairment correlations may be used to compute RAKE combining weights for received signal processing, or to compute Signal-to-Interference (SIR) estimates. Combined or separate models may be used for multiple received signals. As such, the exemplary modeling is extended to soft handoff, multiple antennas, and other diversity situations.
摘要翻译： 示例性的接收信号处理可以基于维持接收信号损害相关的模型，其中基于感兴趣的接收信号的测量损伤，模型的每个项被周期性地或根据需要更新。 示例性模型包括由第一模型拟合参数缩放的干扰损害项和由第二模型拟合参数缩放的噪声损伤项。 模型条款可以根据当前的渠道估计和延迟信息进行维护，并且可以通过根据测量的损失调整模型拟合参数来适应测量的损益。 建模的接收信号损害相关可用于计算接收信号处理的RAKE组合权重，或用于计算信号与干扰（SIR）估计。 组合或分离的模型可用于多个接收信号。 因此，示例性建模被扩展到软切换，多个天线和其他分集情况。
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公开(公告)号：US5968198A
公开(公告)日：1999-10-19
申请号：US699101
申请日：1996-08-16
IPC分类号： H04L1/00 , H03M13/09 , H03M13/13 , H03M13/15 , H03M13/29 , H03M13/37 , H03M13/45 , H04L1/16 , H04L1/18 , H04L25/06 , H03M13/00
CPC分类号： H04L25/067 , H03M13/13 , H03M13/27 , H03M13/2906 , H03M13/2933 , H03M13/3738 , H03M13/456 , H03M13/6306 , H04L1/0065 , H04L1/0071 , H03M13/09 , H03M13/6331 , H04L1/1809 , H04L1/1816
摘要： A coding system is disclosed wherein the receive side includes a decoder capable of producing, in addition to the hard information decoded output, either or both symbol and/or bit soft information values. For a certain information bit position, a value proportional to the joint probability that a received symbol and the set of all hypothesized transmitted codewords that led to the estimated or detected hard information output is calculated. The calculated probabilities with respect to plural codewords having a zero in that certain information bit position are compared to the calculated probabilities with respect to the plural codewords having a one in that certain information bit position. The result of the comparison provides an indication of whether the hard information output in that same information bit position is more likely a one or a zero. The output soft information values are further processed in comparison to a preset threshold, with instances exceeding the threshold triggering block rejections and/or retransmissions.
摘要翻译： 公开了一种编码系统，其中接收端包括能够产生除硬信息解码输出之外的符号和/或位软信息值之一或两者的解码器。 对于某个信息位位置，计算与接收到的符号和导致估计或检测到的硬信息输出的所有假设的发送码字的集合的联合概率成比例的值。 将具有该特定信息位位置的零的多个码字的计算概率与该特定信息位位置中具有一个的多个码字的计算概率进行比较。 比较结果提供了在该相同信息位位置中的硬信息输出是否更可能是一个或零的指示。 与预设阈值相比，输出软信息值进一步处理，其中实例超过阈值触发块拒绝和/或重传。
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公开(公告)号：US06658050B1
公开(公告)日：2003-12-02
申请号：US09151713
申请日：1998-09-11
申请人： Rajaram Ramesh , Yi-Pin Eric Wang
发明人： Rajaram Ramesh , Yi-Pin Eric Wang
IPC分类号： H04B138
CPC分类号： H04W52/362 , H04L25/0234
摘要： A transceiver transmits signals with power control bits, the power control bits instructing the other transceiver to establish selected power levels for its return signal. In one form, a processor is adapted to determine channel coefficients for the pilot symbols as a function of both (1) the selected power levels of the other transceiver signal and (2) the difference between the predetermined pilot symbols and the pilot symbols as received by the receiver. The processor then interpolates channel coefficients for all symbols in the received signals based on the determined pilot symbol channel coefficients. In an alternate form, the processor uses a selected auto-correlation function which takes into account the selected power levels of the other transceiver signal to calculate an interpolation filter. In this alternate form, the processor then uses the calculated interpolation filter and channel coefficients for the pilot symbols to interpolate channel coefficients for symbols between the pilot symbols. A demodulator demodulates all received symbols based on the interpolated channel coefficients.
摘要翻译： 收发器用功率控制位发送信号，功率控制位指示另一个收发器为其返回信号建立选定的功率电平。 在一种形式中，处理器适于确定导频符号的信道系数作为（1）另一个收发器信号的所选功率电平的函数，以及（2）预定导频符号和接收到的导频符号之间的差异 由接收者。 然后，处理器基于所确定的导频符号信道系数内插所接收信号中的所有符号的信道系数。 在替代形式中，处理器使用所选择的自相关函数，其考虑了另一收发器信号的选定功率电平来计算内插滤波器。 在该替代形式中，处理器然后使用所计算的内插滤波器和导频符号的信道系数来内插导频符号之间的符号的信道系数。 解调器基于内插的信道系数来解调所有接收的符号。
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5.发明授权Method and apparatus for signal quality loss compensation in multiplexing transmission systems 有权复用传输系统信号质量损失补偿的方法和装置公开(公告)号：US09130706B2
公开(公告)日：2015-09-08
申请号：US11138724
申请日：2005-05-26
CPC分类号： H04L1/0026 , H04B7/061 , H04B7/0678 , H04B7/0691 , H04B7/0697 , H04B17/309 , H04L1/0003 , H04L1/0009 , H04L1/0033 , H04L1/06 , H04L1/20 , H04L5/0057 , H04W24/10
摘要： A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing.
摘要翻译： 接收包括两个或多个信号流的多路复用信号的无线通信接收机根据流专用接收信号质量计算多路复用信号的接收信号质量，确定一个或多个指示流特定接收信号变化的丢失参数 质量，并根据这些信息产生质量反馈。 反过来，发射机基于质量反馈来控制对多路复用信号的一个或多个传输参数的选择，使得其发射链路适应性考虑到接收机的接收信号质量中由于流特定的变化引起的损耗 收到信号质量。 质量反馈可以包括计算的损失值或允许损耗计算的参数/惩罚，并且该方法适用于码复用和空间复用两者。
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公开(公告)号：US07773950B2
公开(公告)日：2010-08-10
申请号：US10869527
申请日：2004-06-16
IPC分类号： H04B17/00
CPC分类号： H04L1/20 , H04B2201/709727 , H04L1/0003 , H04L1/0026 , H04L1/206
摘要： A receiver circuit suppresses effects of “benign” impairment from the calculation of received signal quality estimates, such that the estimate depends primarily on the effects of non-benign impairment. For example, a received signal may be subject to same-cell and other-cell interference plus noise, which is generally modeled using a Gaussian distribution, and also may be due to certain forms of self-interference, such as quadrature phase interference arising from imperfect derotation of the pilot samples used to generate channel estimates for the received signal. Such interference generally takes on a distribution defined by the pilot signal modulation, e.g., a binomial distribution for binary phase shift keying modulation. Interference arising from such sources is relatively “benign” as compared to Gaussian interference and thus should be suppressed or otherwise discounted in signal quality calculations. Suppression may be based on subtracting benign impairment correlation estimates from total impairment correlation estimates, or on filtering the benign impairment in channel estimation.
摘要翻译： 接收机电路抑制从接收到的信号质量估计的计算中的“良性”损伤的影响，使得估计主要取决于非良性损伤的影响。 例如，接收到的信号可以经受相同小区和其他小区干扰加噪声，其通常使用高斯分布来建模，并且还可能是由于某些形式的自干扰，例如由 用于产生接收信号的信道估计的导频样本的不完全解旋。 这种干扰通常采用由导频信号调制定义的分布，例如二进制相移键控调制的二项分布。 与高斯干扰相比，从这些源产生的干扰相对“良性”，因此在信号质量计算中应被抑制或以其他方式折扣。 抑制可以基于从总损伤相关性估计中减去良性损伤相关估计，或者在滤波信道估计中的良性损伤。
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7.发明授权Systems and methods for random access in time division multiple access satellite radiotelephone communications 失效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
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 。
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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。
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9.发明授权Impairment covariance and combining weight updates during iterative turbo interference cancellation reception 有权减弱协方差，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。
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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
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。
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