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111.发明授权Communications methods, apparatus and computer program products using gain multipliers 有权使用增益乘法器的通信方法，设备和计算机程序产品公开(公告)号：US07236514B2
公开(公告)日：2007-06-26
申请号：US09968443
申请日：2001-10-01
IPC分类号： H04B1/00
CPC分类号： H04L25/0224 , H04B1/71052 , H04B1/712 , H04B7/0848 , H04B2201/709727 , H04L25/0204 , H04W52/16
摘要： A communications signal is processed to determine a proportionality relationship between a gain of a first channel (e.g., a pilot channel) and a gain of a second channel (e.g., a traffic channel) from a model of the first channel and information recovered from the second channel according to the model of the first channel. Symbol estimates may be generated from the information received over the second channel based on the determined proportionality relationship. In some embodiments, a gain multiplier may be estimated from information received over the second channel, a channel estimate for the first channel and a noise estimate for the first channel, for example, by generating despread values from the information received over the second channel, processing the despread values according to the channel estimate to generate symbol estimates, and generating the estimate of the gain multiplier from the noise estimate and the symbol estimates. Methods, apparatus and computer program products are provided.
摘要翻译： 处理通信信号以确定来自第一信道的模型的第一信道（例如，导频信道）的增益和第二信道的增益（例如，业务信道）之间的比例关系，以及从第 第二通道根据第一通道的型号。 可以基于所确定的比例关系从通过第二信道接收的信息生成符号估计。 在一些实施例中，可以通过第二信道接收的信息，第一信道的信道估计和第一信道的噪声估计来估计增益乘数，例如，通过在第二信道上接收的信息产生解扩值， 根据信道估计处理解扩值以产生符号估计，以及根据噪声估计和符号估计生成增益乘数的估计。 提供方法，仪器和计算机程序产品。
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112.发明授权Rake combining methods and apparatus using weighting factors derived from knowledge of spreading spectrum signal characteristics 有权使用从扩展频谱信号特征的知识导出的加权因子的耙式组合方法和装置公开(公告)号：US06714585B1
公开(公告)日：2004-03-30
申请号：US09344899
申请日：1999-06-25
IPC分类号： H04B1707
CPC分类号： H04B1/712 , H04B1/7117
摘要： Information encoded in a transmitted spread spectrum signal included in a composite signal is recovered. The composite signal is received from the communications medium, and correlated with a desired spreading sequence to produce a plurality of time-offset correlations. Weighting factors are generated based on knowledge of spread spectrum signals in the composite signal. The correlations are combined according to the weighting factors to estimate information encoded in the transmitted spread spectrum signal. According to one aspect, a composite channel response is estimated from knowledge of the desired spreading sequence and an impairment correlation is determined from an estimate of power of an interfering spread spectrum signal and an estimate of power of noise in the composite signal. The composite channel response and impairment correlation are used to generate the weighting factors. According to another aspect, weighting factors are iteratively generated from an estimated channel response, an estimated impairment correlation, and previously determined weighting factors. Related apparatus are also described.
摘要翻译： 在复合信号中包含的发送的扩频信号中编码的信息被恢复。 从通信介质接收复合信号，并与期望的扩展序列相关，以产生多个时间偏移相关。 基于复合信号中扩频信号的知识产生加权因子。 根据加权因子组合相关性以估计在所发射的扩频信号中编码的信息。 根据一个方面，根据期望的扩展序列的知识估计复合信道响应，并根据干扰扩频信号的功率估计和复合信号中的噪声功率的估计来确定损害相关。 复合信道响应和损伤相关用于产生加权因子。 根据另一方面，从估计的信道响应，估计的损害相关性和先前确定的加权因子迭代地产生加权因子。 还描述了相关装置。
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113.发明授权Methods and apparatus for allocating resources in hybrid TDMA communication systems 有权用于在混合TDMA通信系统中分配资源的方法和装置公开(公告)号：US06631124B1
公开(公告)日：2003-10-07
申请号：US09432989
申请日：1999-11-03
申请人： Havish Koorapaty , Yi-Pin Eric Wang , Paul W. Dent
发明人： Havish Koorapaty , Yi-Pin Eric Wang , Paul W. Dent
IPC分类号： H04J300
CPC分类号： H04W72/08 , H04B7/2618 , H04W48/06
摘要： A wireless communications system including at least one base station operative to communicate with terminals on a plurality of carrier frequencies in repetitive time slots defined thereon is operated by assigning an entire time slot or a spreading-code defined subchannel of a time slot to a terminal based on a communications constraint associated with the terminal. The communications constraint may include a performance requirement, such as an information rate or an error rate, and a signal reception condition, such as signal to noise ratio. According to another aspect, a wireless communications system determines a communications constraint associated with a terminal. The system assigns a time slot, a spreading code, a coding rate and a bandwidth to the terminal based on the determined communications constraint. Preferably, the system assigns a time slot, a spreading code, a coding rate and a bandwidth to the terminal such that at least one of an available bandwidth, a number of available time slots, and a number of available spreading codes is optimized. Related apparatus are also described.
摘要翻译： 一种无线通信系统，包括至少一个基站，可操作以与在其上定义的重复时隙中的多个载波频率上的终端进行通信，通过将时隙的全部时隙或扩展码定义的子信道分配给终端来进行操作 关于与终端相关联的通信约束。 通信约束可以包括诸如信息速率或错误率的性能要求，以及诸如信噪比的信号接收条件。 根据另一方面，无线通信系统确定与终端相关联的通信约束。 系统基于所确定的通信约束向终端分配时隙，扩展码，编码率和带宽。 优选地，系统向终端分配时隙，扩展码，编码率和带宽，使得可用带宽，可用时隙的数量和可用扩展码的数量中的至少一个被优化。 还描述了相关装置。
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公开(公告)号：US06185244B2
公开(公告)日：2001-02-06
申请号：US09129151
申请日：1998-08-05
IPC分类号： H04L2730
CPC分类号： H04B1/7083 , H04J13/107 , H04L7/043
摘要： A special coding scheme is disclosed for more effectively acquiring a long code and frame timing during a cell search in a CDMA communications system. A code set of length M Q-ary code words including symbols from a set of Q short codes is defined with certain properties. The primary property to be satisfied is that no cyclic shift of a code word yields a valid code word. The other properties to be satisfied are that there is a one-to-one mapping between a long code message and a valid code word, and a decoder should be able to find both the random shift (thereby implicitly finding the frame timing) and the transmitted code word (i.e., its associated long code indication message) in the presence of interference and noise, with some degree of accuracy and reasonable complexity.
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115.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：US09356730B2
公开(公告)日：2016-05-31
申请号：US12524801
申请日：2008-01-29
申请人： Jung-Fu Cheng , Yi-Pin Eric Wang
发明人： Jung-Fu Cheng , Yi-Pin Eric Wang
CPC分类号： H04L1/0011 , H03M13/095 , H03M13/11 , H04L1/003 , H04L1/0083 , H04L1/0084
摘要： Teachings presented herein provide a method and apparatus for processing input information bits for coding using a code, such that the length of the information word formed from the input information bits matches a fixed information word length defined by the code. In at least one embodiment, a coding circuit receives input information bits (and adds error protection bits as needed, to make the information word length match the fixed information word length. The method and apparatus contemplate generating the error protection bits by sub-coding a subset of the input information bits (e.g., parity bit generation), thereby providing extra protection for that subset. These teachings allow the same code to be used for coding feedback or other information, where the amount of information to be coded varies as a function of operating modes.
摘要翻译： 本文提出的教学提供了一种用于处理使用代码进行编码的输入信息位的方法和装置，使得从输入信息位形成的信息字的长度与由代码定义的固定信息字长相匹配。 在至少一个实施例中，编码电路接收输入信息比特（并且根据需要添加误差保护比特，以使信息字长度与固定信息字长度匹配），该方法和装置考虑通过对子帧进行子编码来产生错误保护比特 输入信息位的子集（例如，奇偶校验位生成），从而为该子集提供额外的保护。这些教导允许将相同的代码用于编码反馈或其他信息，其中待编码的信息量作为函数变化 的操作模式。
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公开(公告)号：US08964912B2
公开(公告)日：2015-02-24
申请号：US11219183
申请日：2005-09-02
IPC分类号： H04B1/10 , H04B1/712 , H04B1/7117
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/709727
摘要： A method and apparatus for determining operating modes in a receiver is described herein. A delay searcher in the receiver detects a signal image in the received signal. When the receiver is a RAKE receiver, a plurality of RAKE fingers coherently combine time-shifted versions of the received signal at different delays. Alternatively, when the receiver is a chip equalization receiver, an FIR filter coherently pre-combines the signal images in the received signal. A processor determines delays. In particular, the processor generates a first signal quality metric for a single-delay receiver mode, and generates a second signal quality metric for a multi-delay receiver mode. Based on a comparison of the first and second signal quality metrics, the processor selects the single-delay or the multi-delay receiver mode for processing the signal image.
摘要翻译： 本文描述了用于确定接收机中的操作模式的方法和装置。 接收机中的延迟搜索器检测接收信号中的信号图像。 当接收机是RAKE接收机时，多个RAKE指头以不同的延迟相干地组合接收信号的时移版本。 或者，当接收机是芯片均衡接收机时，FIR滤波器相干地预组合接收信号中的信号图像。 处理器确定延迟。 特别地，处理器为单延迟接收器模式产生第一信号质量度量，并且产生用于多延迟接收器模式的第二信号质量度量。 基于第一和第二信号质量度量的比较，处理器选择用于处理信号图像的单延迟或多延迟接收器模式。
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公开(公告)号：US08542781B2
公开(公告)日：2013-09-24
申请号：US13050697
申请日：2011-03-17
申请人： Yi-Pin Eric Wang , Dennis Hui
发明人： Yi-Pin Eric Wang , Dennis Hui
IPC分类号： H04L27/00
CPC分类号： H04L25/08 , H04L25/03012 , H04L25/03159 , H04L25/03171 , H04L25/03184 , H04L25/03312 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： In one of its aspects the technology disclosed herein concerns a method of operating a receiver. The method comprises performing symbol detection by (1) receiving a frequency-domain signal that comprises contribution from time-domain symbols transmitted from one or more transmit antennas; (2) generating a transformation matrix and a triangular matrix based on a frequency domain channel response; (3) using the transformation matrix to transform the received frequency-domain signal to obtain a transformed frequency-domain signal; and (4) performing symbol detection by performing plural stages of detection, each stage of detection using elements of the transformed frequency-domain received signal associated with the detection stage.
摘要翻译： 在其中的一个方面，本文公开的技术涉及操作接收机的方法。 该方法包括：（1）接收包括从一个或多个发射天线发射的时域符号的贡献的频域信号; （2）基于频域信道响应生成变换矩阵和三角矩阵; （3）使用变换矩阵来变换接收到的频域信号以获得变换的频域信号; 和（4）通过执行多级检测来执行符号检测，每个检测阶段使用与检测级相关联的变换的频域接收信号的元素。
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公开(公告)号：US20130148634A1
公开(公告)日：2013-06-13
申请号：US13324645
申请日：2011-12-13
IPC分类号： H04W36/00
CPC分类号： H04B7/0691 , H04B7/0452 , H04B7/0665 , H04B7/0697 , H04L25/0202
摘要： With the asymmetric resource sharing disclosed herein, a base station transmits fewer information symbols at some transmission times to one or more mobile terminals than to other mobile terminals at other transmission times. After transmitting the information symbols, the base station receives channel estimates from the mobile terminals, which the base station then use to generate synthesized signals representing estimates of the signals received at the mobile terminals. The base station subsequently combines complementary pairs of the synthesized signals to generate combined signals and transmits at least one of the combined signals to implement at least one virtual antenna for at least one of the mobile terminals.
摘要翻译： 利用这里公开的不对称资源共享，基站在一些传输时间将更少的信息符号发送到一个或多个移动终端，而不是在其他传输时间的其他移动终端。 在发送信息符号之后，基站从移动终端接收信道估计，基站然后用于产生表示在移动终端处接收的信号的估计的合成信号。 基站随后组合互补的合成信号对以产生组合信号并发送组合信号中的至少一个，以便为至少一个移动终端实现至少一个虚拟天线。
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120.发明授权公开(公告)号：US08428106B2
公开(公告)日：2013-04-23
申请号：US12138655
申请日：2008-06-13
IPC分类号： H04B1/00
CPC分类号： H04L25/0242 , H04B1/71052 , H04B1/712 , H04B2201/709727 , H04L25/0208
摘要： The technology comprises method(s) and apparatus for operating a telecommunications system. In its basic form the method comprises providing plural channelization codes for potential use by an uplink receiver; using unused channelization codes of the plural codes to generate an estimate of an impairment covariance matrix; and using the estimate of the impairment covariance matrix to form a processing parameter. For example, the processing parameter can be one or more weight values which, in turn, are can be used for generating a combined output signal.
摘要翻译： 该技术包括用于操作电信系统的方法和装置。 在其基本形式中，该方法包括提供用于上行链路接收机的潜在用途的多个信道化码; 使用所述多个代码的未使用的信道化码来生成损害协方差矩阵的估计; 并使用损伤协方差矩阵的估计来形成处理参数。 例如，处理参数可以是一个或多个加权值，其又可以用于产生组合的输出信号。
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