公开(公告)号：US07668226B2

公开(公告)日：2010-02-23

申请号：US11064351

申请日：2005-02-23

申请人： Douglas Cairns

发明人： Douglas Cairns

IPC分类号： H04B1/00

CPC分类号： H04W52/16 ,  H04B1/712 ,  H04B17/336 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/067 ,  H04L27/08

摘要： A method of processing an amplitude-modulated traffic signal involves the determination of a gain offset between the traffic signal and a reference signal, e.g., a pilot signal, received in association with the traffic signal, based on relating values known or determined from the reference signal to that gain offset. For example, in at least one embodiment of a wireless communication receiver, one or more processing circuits are configured to compute the gain offset based on the average magnitude of estimated traffic symbols and a signal-to-noise ratio. The received traffic symbols can be estimated using soft combining weights calculated from the reference signal, as can the signal-to-noise ratio. With the gain offset thus determined, the estimated traffic symbols can be scaled properly for subsequent processing, such as in log-likelihood ratio processing to recover the traffic signal data.

摘要翻译： 一种处理幅度调制业务信号的方法涉及基于从参考信号已知或确定的相关值来确定业务信号与参考信号（例如，与业务信号相关联接收的导频信号）之间的增益偏移 信号到该增益偏移。 例如，在无线通信接收机的至少一个实施例中，一个或多个处理电路被配置为基于估计的业务符号的平均幅度和信噪比来计算增益偏移。 可以使用从参考信号计算的软组合权重来估计接收到的业务符号，信噪比也可以。 利用如此确定的增益偏移，可以适当地缩放估计的业务符号以用于后续处理，例如对数似然比处理以恢复业务信号数据。

公开(公告)号：US20090310715A1

公开(公告)日：2009-12-17

申请号：US12239918

申请日：2008-09-29

申请人： Douglas Cairns ,  Elias Jonsson

发明人： Douglas Cairns ,  Elias Jonsson

IPC分类号： H04L27/38 ,  H04L27/06

CPC分类号： H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

摘要： A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

摘要翻译： 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK的低阶调制来调制软导频符号，同时以诸如16QAM或64QAM的更高阶调制来调制剩余的符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：US20090310708A1

公开(公告)日：2009-12-17

申请号：US12239889

申请日：2008-09-29

申请人： Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

发明人： Jung-Fu Cheng ,  Tracy Fulghum ,  Douglas Cairns

IPC分类号： H04L27/36 ,  H04L27/00 ,  H04L27/20

CPC分类号： H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

摘要： A transmitter, channel coder, and method for coding and transmitting a sequence of symbols in a digital communication system utilizing soft pilot symbols. In one embodiment, the transmitter transmits a set of soft pilot symbols with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The transmitter shares the modulation type and location (time/frequency/code) of the soft pilot symbols with a receiver. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols. In another embodiment, soft pilot symbols are inserted by low-level puncturing of channel encoded bits and replacing the punctured bits with known bit patterns.

摘要翻译： 用于使用软导频符号在数字通信系统中对符号序列进行编码和发送的发射机，信道编码器和方法。 在一个实施例中，发射机通过用低阶调制（诸如BPSK或QPSK）调制软导频符号，以较高阶调制方式调制剩余符号，从而发送具有比序列中的剩余符号更高的可靠性的一组软导频符号， 作为16 QAM或64 QAM。 发射机与接收机共享软导频符号的调制类型和位置（时间/频率/码）。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。 在另一个实施例中，通过信道编码比特的低级删截插入软导频符号，并用已知的比特模式替换被删余的比特。

公开(公告)号：US20060188006A1

公开(公告)日：2006-08-24

申请号：US11064351

申请日：2005-02-23

申请人： Douglas Cairns

发明人： Douglas Cairns

IPC分类号： H04B1/707 ,  H03D1/24

CPC分类号： H04W52/16 ,  H04B1/712 ,  H04B17/336 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/067 ,  H04L27/08

摘要： A method of processing an amplitude-modulated traffic signal involves the determination of a gain offset between the traffic signal and a reference signal, e.g., a pilot signal, received in association with the traffic signal, based on relating values known or determined from the reference signal to that gain offset. For example, in at least one embodiment of a wireless communication receiver, one or more processing circuits are configured to compute the gain offset based on the average magnitude of estimated traffic symbols and a signal-to-noise ratio. The received traffic symbols can be estimated using soft combining weights calculated from the reference signal, as can the signal-to-noise ratio. With the gain offset thus determined, the estimated traffic symbols can be scaled properly for subsequent processing, such as in log-likelihood ratio processing to recover the traffic signal data.

摘要翻译： 一种处理幅度调制业务信号的方法涉及基于从参考信号已知或确定的相关值来确定业务信号与参考信号（例如，与业务信号相关联接收的导频信号）之间的增益偏移 信号到该增益偏移。 例如，在无线通信接收机的至少一个实施例中，一个或多个处理电路被配置为基于估计的业务符号的平均幅度和信噪比来计算增益偏移。 可以使用从参考信号计算的软组合权重来估计接收到的业务符号，信噪比也可以。 利用如此确定的增益偏移，可以适当地缩放估计的业务符号以用于后续处理，例如对数似然比处理以恢复业务信号数据。

公开(公告)号：US20060072485A1

公开(公告)日：2006-04-06

申请号：US10943274

申请日：2004-09-17

申请人： Douglas Cairns ,  Leonid Krasny

发明人： Douglas Cairns ,  Leonid Krasny

IPC分类号： H04B3/20

CPC分类号： H04L25/03006

摘要： A frequency domain representation of a whitening filter is made to depend on essentially one unknown, namely, a scaling factor that is based on an estimated ratio of total base station power to the power spectral density (PSD) of inter-cell interference plus noise. In turn, that scaling factor can be computed based on the modeling terms used in a parametric model of the impairment correlations for a received communication signal. Preferably, the model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameter. Further, the scaling factor can be computed by directly estimating total base station transmit power and the PSD of inter-cell interference plus noise. In any case, the whitening filter can be used in whitening a received communication signal in conjunction with channel equalization processing or RAKE receiver processing, for example.

摘要翻译： 使白化滤波器的频域表示依赖于基本上一个未知数，即基于总基站功率与小区间干扰加上噪声的功率谱密度（PSD）的估计比的缩放因子。 反过来，可以基于在接收到的通信信号的损害相关性的参数模型中使用的建模项来计算该缩放因子。 优选地，该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。 此外，可以通过直接估计总基站发射功率和小区间干扰加上噪声的PSD来计算缩放因子。 在任何情况下，例如，白化滤波器可用于结合信道均衡处理或RAKE接收机处理来使接收到的通信信号变白。

公开(公告)号：US20060063505A1

公开(公告)日：2006-03-23

申请号：US10943720

申请日：2004-09-17

申请人： Douglas Cairns

发明人： Douglas Cairns

IPC分类号： H04B1/18 ,  H04B1/10 ,  H03D1/04

CPC分类号： H04L25/03006 ,  H04B1/7097 ,  H04B2201/709727 ,  H04L2025/03535

摘要： A wireless communication receiver is configured to suppress interference with respect to a received signal of interest on a selective basis responsive to evaluating whether the receiver currently is or is not operating in a colored noise/interference environment. For example, an exemplary Code Division Multiple Access (CDMA) mobile station activates or deactivates interference suppression responsive to determining and evaluating an orthogonality factor, which, in this context, serves as a measure of how much downlink power gets converted into same-cell interference via multipath propagation. The orthogonality factor thus serves as an indicator of noise plus interference coloration. In one or more exemplary embodiments, then, an exemplary receiver circuit is configured to determine the orthogonality factor, evaluate it, and selectively enable or disable received signal whitening based on that evaluation. The exemplary receiver circuit and associated selective whitening method can be applied to various receiver architectures and signal types.

摘要翻译： 响应于评估接收机当前是否在彩色噪声/干扰环境中操作，无线通信接收机被配置为基于选择性来抑制关于所接收的感兴趣信号的干扰。 例如，示例性码分多址（CDMA）移动站响应于确定和评估正交因子而激活或去激活干扰抑制，在正交性因子中，其在下文中用作下载功率被转换成相同小区干扰的量度 通过多径传播。 因此，正交因子用作噪声加干扰着色的指标。 在一个或多个示例性实施例中，然后，示例性接收机电路被配置为确定正交因子，评估它，以及基于该评估选择性地启用或禁用接收信号白化。 示例性的接收机电路和相关的选择性白化方法可以应用于各种接收机架构和信号类型。

公开(公告)号：US20120155574A1

公开(公告)日：2012-06-21

申请号：US13403369

申请日：2012-02-23

申请人： Douglas Cairns ,  Elias Jonsson

发明人： Douglas Cairns ,  Elias Jonsson

IPC分类号： H04L27/06 ,  H03D1/24

CPC分类号： H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

摘要： A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

摘要翻译： 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK之类的较低阶调制来调制软导频符号，同时以诸如16QAM或64等更高阶调制调制剩余符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 QAM。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：US20060182204A1

公开(公告)日：2006-08-17

申请号：US11402676

申请日：2006-04-12

申请人： Douglas Cairns ,  Gregory Bottomley

发明人： Douglas Cairns ,  Gregory Bottomley

IPC分类号： H04L27/06

CPC分类号： H04L25/03044 ,  H04B1/7117 ,  H04B1/712 ,  H04B2201/70707 ,  H04B2201/709727 ,  H04L2025/03477 ,  H04L2025/03515

摘要： A receiver includes a baseband processor for selecting a set of demodulation processing delays for received signal demodulation from a larger set of candidate delays. In one embodiment, the baseband processor selects the set of demodulation processing delays by calculating at least one metric for each demodulation processing delay in the set of candidate delays, iteratively reducing the set of candidate delays by eliminating one or more demodulation processing delays from the set as a function of comparing the metrics, and setting the processing delays for received signal demodulation to the candidate delays remaining after reduction. In a Generalized RAKE (G-RAKE) embodiment, the metric corresponds to combining weight magnitudes associated with G-RAKE finger delays. In a chip equalizer embodiment, the metric corresponds to coefficient magnitudes associated with equalization filter tap delays. In other embodiments, the metric corresponds to Signal to Interference Ratios (SIRs) associated with the set of candidate delays.

摘要翻译： 接收机包括基带处理器，用于从更大的一组候选延迟中选择用于接收信号解调的一组解调处理延迟。 在一个实施例中，基带处理器通过针对候选延迟集合中的每个解调处理延迟计算至少一个度量来选择一组解调处理延迟，通过从集合中消除一个或多个解调处理延迟来迭代地减少候选延迟集合 作为比较度量的函数，以及将接收信号解调的处理延迟设置为在还原之后剩余的候选延迟。 在广义RAKE（G-RAKE）实施例中，度量对应于与G-RAKE手指延迟相关联的重量幅度。 在码片均衡器实施例中，度量对应于与均衡滤波器抽头延迟相关联的系数幅度。 在其他实施例中，度量对应于与该组候选延迟相关联的信号与干扰比（SIR）。

公开(公告)号：US20050201447A1

公开(公告)日：2005-09-15

申请号：US10800167

申请日：2004-03-12

申请人： Douglas Cairns ,  Gregory Bottomley ,  Yi-Pin Wang ,  Tracy Fulghum ,  Elias Jonsson

发明人： Douglas Cairns ,  Gregory Bottomley ,  Yi-Pin Wang ,  Tracy Fulghum ,  Elias Jonsson

IPC分类号： H04B1/707

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。

公开(公告)号：US06707857B1

公开(公告)日：2004-03-16

申请号：US09616252

申请日：2000-07-14

申请人： Douglas Cairns

发明人： Douglas Cairns

IPC分类号： H04L2549

CPC分类号： H04L27/206 ,  H04L27/364

摘要： A variable frequency synthesizer is used during generation of a phase-encoded signal. The reference signal input to the frequency synthesizer is not held stable and constant, but is instead deliberately varied to control the output of the frequency synthesizer. This varying reference signal, referred to as the phase reference signal, is derived from traditional inphase and quadrature signals, as modified by a phase distorter. The phase distorter applies a pre-distortion to the inphase and quadrature signals so as to compensate for band limiting effects of the frequency synthesizer. The signal transmitted is then based on the phase-encoded signal.

摘要翻译： 在生成相位编码信号时使用可变频率合成器。 输入到频率合成器的参考信号不能保持稳定和恒定，而是故意改变以控制频率合成器的输出。 被称为相位参考信号的这个变化的参考信号是由传统的同相和正交信号导出的，如相位变形器所修改的那样。 相位变形器对同相和正交信号施加预失真，以补偿频率合成器的频带限制效应。 然后发送的信号基于相位编码信号。