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1.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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2.发明授权公开(公告)号：US06683924B1
公开(公告)日：2004-01-27
申请号：US09420957
申请日：1999-10-19
IPC分类号： H04L2706
CPC分类号： H04B1/712 , H04B1/709 , H04B1/7117 , H04B2201/709727
摘要： Correlation times for a RAKE receiver are determined from time differentials between multipath components of a received signal based on correlation metrics, preferably signal strength measurements, associated with the multipath components. According to various embodiments of the present invention, selection strategies are employed in which “desired signal collecting” and “interference collecting” correlation times may be selected using average optimal (AO) or instantaneous optimal (IO) selection criteria. These criteria may include, for example, thresholds for signal strengths associated with multipath components of a signal at the correlation times, where the signal strengths may include absolute or relative measures of signal power or signal to noise ratio. According to alternative embodiments, correlation times are selected using an inverse filter of an estimated channel response. Related apparatus is also described.
摘要翻译： 基于与多路径分量相关联的相关度量，优选信号强度测量，从接收信号的多径分量之间的时间差确定RAKE接收机的相关时间。 根据本发明的各种实施例，采用选择策略，其中可以使用平均最优（AO）或瞬时最优（IO）选择标准来选择“期望的信号收集”和“干扰收集”相关时间。 这些标准可以包括例如与在相关时间的信号的多径分量相关联的信号强度的阈值，其中信号强度可以包括信号功率或信噪比的绝对或相对测量。 根据替代实施例，使用估计的信道响应的逆滤波器来选择相关时间。 还描述了相关装置。
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3.发明授权公开(公告)号：US06975672B2
公开(公告)日：2005-12-13
申请号：US09756504
申请日：2001-01-08
CPC分类号： H04L25/03305 , H04B2201/709727 , H04L25/03299
摘要： A communications signal representing symbols encoded according to respective portions of a spreading sequence is decoded. Time-offset correlations of the communications signal with the spreading sequence are generated. The time-offset correlations are combined to generate first estimates for the symbols. Intersymbol interference factors that include a relationship among different portions of the spreading sequence are determined, and a second estimate for one of the symbols is generated from the first estimates based on the determined intersymbol interference factors. An intersymbol interference factor may include a relationship between a first portion of the spreading sequence associated with the one symbol to a second portion of the spreading sequence associated with another symbol and may be determined, for example, from the spreading sequence and a channel estimate for a channel over which the communications signal is communicated. The invention may be embodied as methods and apparatus, for example, as a receiver included in a communications apparatus, such as a wireless terminal, wireless base station, or other wireless, wireline or optical communications apparatus.
摘要翻译： 表示根据扩展序列的各个部分编码的符号的通信信号被解码。 产生通信信号与扩展序列的时间偏移相关。 时间偏移相关被组合以产生符号的第一估计。 确定包括扩展序列的不同部分之间的关系的符号间干扰因子，并且基于确定的符号间干扰因子从第一估计生成符号之一的第二估计。 符号间干扰因子可以包括与一个符号相关联的扩展序列的第一部分与与另一符号相关联的扩展序列的第二部分之间的关系，并且可以例如从扩展序列和用于 通信信号通过该信道。 本发明可以被实现为例如作为诸如无线终端，无线基站或其他无线，有线或光通信设备的通信设备中包括的接收机的方法和装置。
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公开(公告)号：US06801565B1
公开(公告)日：2004-10-05
申请号：US09344898
申请日：1999-06-25
IPC分类号： H04B1707
CPC分类号： H04B1/712 , H04B1/709 , H04B1/7117
摘要： Information encoded in a spread spectrum signal transmitted in a communications medium is recovered. A composite signal including a spread spectrum signal is received from the communications medium, and correlated with a spreading sequence to generate time-offset correlations. Respective first and second groups of the correlations are combined, e.g., according to estimated channel coefficients, to produce respective first and second combined values. The first and second combined values are then combined in a manner that compensates for correlated impairment in the composite signal to generate an estimate information in the transmitted spread spectrum signal, e.g., using weighting factors generated from an estimated composite channel response and an estimated impairment correlation, or adaptively generated weighting factors. Related apparatus are also described.
摘要翻译： 在通信介质中发送的扩频信号中编码的信息被恢复。 从通信介质接收包括扩展频谱信号的复合信号，并与扩展序列相关以产生时间偏移相关。 各个相关的第一和第二组例如根据估计的信道系数被组合，以产生相应的第一和第二组合值。 然后，以补偿复合信号中的相关损害的方式组合第一和第二组合值，以在发射的扩频信号中产生估计信息，例如，使用从估计的复合信道响应和估计的损耗相关性产生的加权因子 ，或自适应产生的加权因子。 还描述了相关装置。
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5.发明授权Method and apparatus for reducing synchronization code interference in CDMA communications systems 有权用于减少CDMA通信系统中的同步码干扰的方法和装置公开(公告)号：US06665288B1
公开(公告)日：2003-12-16
申请号：US09436788
申请日：1999-11-08
申请人： Tony Ottosson , Yi-Pin Eric Wang
发明人： Tony Ottosson , Yi-Pin Eric Wang
IPC分类号： H04B7216
CPC分类号： H04W52/54 , H04B1/7107 , H04B2201/709709
摘要： In a code division multiple access (CDMA) communications system, a synchronization code is transmitted on a first channel. Information is selectively communicated on a second channel, e.g., a dedicated physical channel, to limit interference attributable to the synchronization code in a signal received over the second channel. In one embodiment, a slot configuration used on the second channel reduces the likelihood of time-coincidence of the synchronization code with information transmitted on the second channel having a higher level of sensitivity to interference, such as transmit power control (TPC) commands or pilot symbols. According to another aspect, interference associated with a synchronization code is canceled from signal received on the second channel to recover information originally transmitted on the second channel. In one embodiment, an estimate of a component of the received signal associated with the synchronization code is generated from the synchronization code and a channel estimate. The estimate of the interference component is canceled from the received signal to generate an interference-canceled version of the received signal, which is then processed to recover information originally transmitted on the second channel.
摘要翻译： 在码分多址（CDMA）通信系统中，在第一信道上发送同步码。 在第二信道（例如，专用物理信道）上选择性地传送信息，以限制在通过第二信道接收的信号中归因于同步码的干扰。 在一个实施例中，在第二信道上使用的时隙配置减少了与具有对干扰的较高灵敏度水平的第二信道上发送的信息的同步码的时间吻合的可能性，例如发射功率控制（TPC）命令或导频 符号。 根据另一方面，与同步码相关联的干扰从在第二信道上接收的信号中消除以恢复最初在第二信道上传输的信息。 在一个实施例中，从同步码和信道估计生成与同步码相关联的接收信号的分量的估计。 从接收到的信号中消除干扰分量的估计，以产生接收信号的干扰消除版本，然后处理它们以恢复最初在第二信道上发送的信息。
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6.发明授权Synchronization and cell search methods and apparatus for wireless communications 有权用于无线通信的同步和小区搜索方法和装置公开(公告)号：US06480558B1
公开(公告)日：2002-11-12
申请号：US09271074
申请日：1999-03-17
申请人： Tony Ottosson , Yi-Pin Eric Wang
发明人： Tony Ottosson , Yi-Pin Eric Wang
IPC分类号： H04B110
CPC分类号： H04B1/7083 , H04B1/7107 , H04B2201/70702
摘要： A received communications signal is correlated with a common synchronization code to produce a synchronization detection signal. A component of the synchronization detection signal associated with a known synchronization signal is canceled from the synchronization detection signal to produce an interference-canceled synchronization detection signal. Timing of a synchronization signal is determined from the interference-canceled synchronization detection signal. According to one aspect, interference cancellation is achieved by generating a correlation of an estimated received known synchronization signal with the common synchronization code, canceling the correlation of the estimated received known synchronization signal with the common synchronization code from the synchronization detection signal to produce the interference-canceled synchronization detection signal. Timing of a synchronization signal may then be determined by accumulating the interference-canceled synchronization detection signal over a time interval, detecting a peak in the accumulated interference-canceled synchronization detection signal, and determining timing of a synchronization signal from the detected peak. According to another aspect, interference cancellation is achieved by accumulating the synchronization detection signal over a time interval, identifying a peak in the accumulated synchronization detection signal not associated with a known synchronization signal, and determining timing of a synchronization signal from the identified peak. Related terminal apparatus are also discussed.
摘要翻译： 接收到的通信信号与公共同步码相关，以产生同步检测信号。 与已知的同步信号相关联的同步检测信号的分量从同步检测信号中消除，以产生干扰消除的同步检测信号。 从干扰消除的同步检测信号确定同步信号的定时。 根据一个方面，通过产生估计的接收到的已知同步信号与公共同步码的相关性来消除干扰消除，从所述同步检测信号中消除估计接收的已知同步信号与公共同步码的相关性，以产生干扰 同步检测信号。 然后可以通过在一段时间间隔内累积干扰消除的同步检测信号来确定同步信号的定时，检测累积的干扰消除同步检测信号中的峰值，以及根据检测到的峰值确定同步信号的定时。 根据另一方面，通过在时间间隔内累积同步检测信号，识别与已知同步信号不相关的累积同步检测信号中的峰值，以及根据所识别的峰值确定同步信号的定时来实现干扰消除。 还讨论了相关终端装置。
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7.发明授权Method and apparatus for multi-user detection using RSFQ successive interference cancellation in CDMA wireless systems 失效CDMA无线系统中使用RSFQ连续干扰消除的多用户检测方法和装置公开(公告)号：US07440490B2
公开(公告)日：2008-10-21
申请号：US10321609
申请日：2002-12-18
CPC分类号： H04B1/7103 , H04B1/7105 , H04B1/71072
摘要： A method and apparatus for using a multi-user detector for reducing multiple access interference (MAI) in a direct sequence CDMA wireless system such as W-CDMA. A superconducting rapid single flux quantum (RSFQ) RF digital receiver operating in combination with an RSFQ successive interference canceller (SIC) is located in the base stations of the wireless system. In the present invention, the RSFQ SIC is a vector machine capable of processing the cross-correlation matrices using an iterative method to decorrelate the user binary code sequences from the input signal in which the interference components are removed. According, the reduction in interference results in a significant increase in system capacity while improving cellular coverage area.
摘要翻译： 一种使用多用户检测器来减少直接序列CDMA无线系统（例如W-CDMA）中的多址干扰（MAI）的方法和装置。 与RSFQ连续干扰消除器（SIC）组合操作的超导快速单通量量子（RSFQ）RF数字接收机位于无线系统的基站中。 在本发明中，RSFQ SIC是一种能够使用迭代方法处理互相关矩阵的向量机，以从去除了干扰分量的输入信号去除相关用户二进制码序列。 据了解，减少干扰导致系统容量的显着提高，同时改善蜂窝覆盖区域。
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