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21. 发明授权

US08218684B2 Method and system for an adaptive automatic gain control (AGC) reference for HSDPA and WCDMA 有权
标题翻译：用于HSDPA和WCDMA的自适应自动增益控制（AGC）参考的方法和系统
公开(公告)号：US08218684B2
公开(公告)日：2012-07-10
申请号：US12260669
申请日：2008-10-29
申请人： Li Fung Chang , Nelson Sollenberger , Abhinav Prasad
发明人： Li Fung Chang , Nelson Sollenberger , Abhinav Prasad
IPC分类号： H04L27/00
CPC分类号： H03G3/005 , H03G3/3052 , H04J13/0044
摘要： In a method and system for an adaptive automatic gain control (AGC) reference for HSDPA and WCDMA, A RF receiver, comprising a RF front-end, may receive a signal comprising a pilot signal via WCDMA or HSDPA. The operation mode of the RF front-end of the RF receiver may be determined based on the received signal components such as a HS-PDCH, a HS-SCCH, and/or a CPICH. The received signal strength information (RSSI) of the received signal may be determined from the output of a matched filter within the RF receiver. A true RSSI, which may be indicated by the received signal code power (RSCP), may be determined based on the pilot symbols over the CPICH. The operation mode determined for the receiver's RF front-end, the determined RSSI, and the determined CPICH_RSCP, may be provided as inputs to an automatic-gain-control (AGC) loop or circuit within the receiver front-end.
摘要翻译：在用于HSDPA和WCDMA的自适应自动增益控制（AGC）参考的方法和系统中，包括RF前端的RF接收机可以经由WCDMA或HSDPA接收包括导频信号的信号。可以基于诸如HS-PDCH，HS-SCCH和/或CPICH的接收信号分量来确定RF接收机的RF前端的操作模式。接收信号的接收信号强度信息（RSSI）可以根据RF接收机内的匹配滤波器的输出来确定。可以由接收信号码功率（RSCP）指示的真实RSSI可以基于CPICH上的导频符号来确定。为接收机的RF前端确定的操作模式，所确定的RSSI和确定的CPICH_RSCP可以被提供为接收机前端内的自动增益控制（AGC）回路或电路的输入。

22. 发明申请

US20090180456A1 METHOD AND SYSTEM FOR ADAPTIVE QUANTIZATION STEPS FOR HS-SCCH DECODING USING AVERAGE CQI 审中-公开
标题翻译：用于使用平均CQI的HS-SCCH解码的自适应量化步骤的方法和系统
公开(公告)号：US20090180456A1
公开(公告)日：2009-07-16
申请号：US12260647
申请日：2008-10-29
申请人： Khoi Ly , Abhinav Prasad , Nelson Sollenberger , Li Fung Chang , Jun Wu
发明人： Khoi Ly , Abhinav Prasad , Nelson Sollenberger , Li Fung Chang , Jun Wu
IPC分类号： H04B7/216
CPC分类号： H04L25/067 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0039 , H04L1/0046 , H04L1/0054
摘要： Aspects of a method and system for adaptive quantization steps for HS-SCCH decoding using average CQI are provided. A HS-SCCH in a received HSDPA signal may be adaptively quantized before HS-SCCH decoding occurs. Quantization information may be determined based on a CQI value associated with the HS-PDSCH. A preferred soft bit precision and quantization geometry, which associated with the quantization information, for the given soft bit precision may be determined based on the CQI value. The received HS-SCCH data may be truncated with the determined soft bit precision in the determined quantization geometry, accordingly. A look-up table, which may comprise the mappings between CQI and quantization step information, may be used for selecting quantization step sizes in HS-SCCH quantizing in order to, for example, lower the complexity in HS-SCCH quantizing.
摘要翻译：提供了使用平均CQI进行HS-SCCH解码的自适应量化步骤的方法和系统的方面。在HS-SCCH解码发生之前，接收的HSDPA信号中的HS-SCCH可被自适应量化。可以基于与HS-PDSCH相关联的CQI值来确定量化信息。可以基于CQI值来确定与给定软比特精度相关的量化信息的优选软比特精度和量化几率。相应地，所确定的量化几何中可以用所确定的软比特精度来截断所接收的HS-SCCH数据。可以使用包括CQI和量化步长信息之间的映射的查找表来选择HS-SCCH量化中的量化步长，以便例如降低HS-SCCH量化中的复杂度。

23. 发明授权

US07508866B2 Acquisition matched filter for W-CDMA systems providing frequency offset robustness 有权
标题翻译： W-CDMA系统采集匹配滤波器提供频偏功能
公开(公告)号：US07508866B2
公开(公告)日：2009-03-24
申请号：US11494660
申请日：2006-07-27
申请人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
发明人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
IPC分类号： H04B1/69 , H04L27/06
CPC分类号： H04B1/7077 , H04B1/7093
摘要： A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage 1 filter matches a sequence which is repeated a number of times according to a second sequence within a secondary synchronization sub-channel of the spread-spectrum signal. The Stage 2 filter of the invention then filters the output of the Stage 1 filter in order to recover a secondary synchronization code. The Stage 2 filters the output of the Stage 1 filter using three matched filters of its own. The first and second filters sample different taps of a sequence output from the Stage 1 filter. The third filter samples a predetermined number of taps overlapping taps for the first and second filters in a way that resolves ambiguities with respect to the identification of the sequence. The ambiguity resolution performed by the third filter improves the frequency offset robustness and thus the overall performance of the receiver.
摘要翻译：用于获取发送的扩频信号的系统和方法使用在接收机中执行的初始信号获取过程的第二阶段中优选地用作阶段2滤波器的匹配滤波器配置。在操作中，阶段1滤波器根据扩展频谱信号的辅同步子信道中的第二序列重复多次重复的序列。然后，本发明的阶段2滤波器对第一阶段滤波器的输出进行滤波，以恢复次同步码。阶段2使用自己的三个匹配的过滤器过滤第一阶段过滤器的输出。第一个和第二个滤波器从Stage 1滤波器中抽取出序列输出的不同抽头。第三滤波器以解决相对于序列的识别的模糊度的方式针对第一和第二滤波器对预定数量的抽头重叠抽头进行抽样。由第三滤波器执行的模糊度分辨率提高了频率偏移鲁棒性，从而提高了接收机的整体性能。

24. 发明申请

US20080130795A1 Method and System for Signal Phase Variation Detection in Communication Systems 有权
标题翻译：通信系统信号相位变化检测方法与系统
公开(公告)号：US20080130795A1
公开(公告)日：2008-06-05
申请号：US11565082
申请日：2006-11-30
申请人： Li Fung Chang , Hongwei Kong , Nelson Sollenberger
发明人： Li Fung Chang , Hongwei Kong , Nelson Sollenberger
IPC分类号： H03D3/22
CPC分类号： H04L25/0228 , H04L2027/0067
摘要： Aspects of a method and system for signal phase variation detection in communication systems are presented. Aspects of the system may enable detection of phase change between a current received symbol, and one or more previous received symbols. Based on the phase change a channel estimation filter bandwidth may be selected for despreading and/or descrambling one or more subsequent received symbols. In addition, a decision may be made as to whether the subsequent received symbols are to be received based on a closed loop system, or based on an open loop system.
摘要翻译：介绍了通信系统信号相位变化检测方法和系统的方面。系统的方面可以使得能够检测当前接收符号与一个或多个先前接收的符号之间的相位变化。基于相位改变，可以选择信道估计滤波器带宽用于解扩和/或解扰一个或多个后续接收符号。此外，可以基于闭环系统或基于开环系统来确定是否要接收后续接收到的符号。

25. 发明申请

US20080130607A1 Method and System for Multimode DC Offset Compensation 审中-公开
标题翻译：多模直流偏移补偿方法与系统
公开(公告)号：US20080130607A1
公开(公告)日：2008-06-05
申请号：US11565562
申请日：2006-11-30
申请人： Junqiang Li , Nelson Sollenberger , Li Fung Chang
发明人： Junqiang Li , Nelson Sollenberger , Li Fung Chang
IPC分类号： H04B7/216 , H04B1/12 , H04L25/06
CPC分类号： H03D3/008
摘要： Aspects of a method and system for multimode DC offset compensation are presented. Aspects of the system may include accumulating a selected number of signal samples, determining an average of the accumulated signal samples, and keeping a running total of the average for use feedback signal generation. The signal samples may be, for example, samples of WCDMA signals. By keeping track of the signal offset error, the signal offset error, or residual DC, may be determined. For example the signal offset error may comprise a DC component and/or a sinusoidal component. The number of signal samples to accumulate for the average may be based on the signal offset error. For example, a threshold may be determined as part of design of an embodiment of the invention.
摘要翻译：提出了一种用于多模直流偏移补偿的方法和系统。系统的方面可以包括累积选定数量的信号采样，确定累积信号样本的平均值，并保持平均值的运行总和以供使用反馈信号产生。信号样本可以是例如WCDMA信号的样本。通过跟踪信号偏移误差，可以确定信号偏移误差或残差DC。例如，信号偏移误差可以包括DC分量和/或正弦分量。可以基于信号偏移误差来累积平均值的信号样本数。例如，可以将阈值确定为本发明的实施例的设计的一部分。

26. 发明授权

US06501785B1 Dynamic frequency hopping 有权
标题翻译：动态跳频
公开(公告)号：US06501785B1
公开(公告)日：2002-12-31
申请号：US09472784
申请日：1999-12-28
申请人： Li Fung Chang , Kapil K. Chawla , Justin C. Chuang , Zoran Kostic , Nelson Sollenberger , Xiaoxin Qiu
发明人： Li Fung Chang , Kapil K. Chawla , Justin C. Chuang , Zoran Kostic , Nelson Sollenberger , Xiaoxin Qiu
IPC分类号： H04J1306
CPC分类号： H04W16/10 , H04B7/2621
摘要： This invention provides a dynamic frequency hopping system that utilizes information from multiple base stations. The system assigns frequency hopping patterns based on current interference and traffic environments to avoid interference thus gaining the benefits of interference averaging and interference avoidance. The system imposes less stringent measurement requirements on terminals (wireless mobile devices) because many measurement requirements are replaced by generating estimates based on measurement data received from other base stations within a base station neighborhood. The system may continuously verify that the frequency hopping patterns assigned to the links of the system optimizes system performance. The system compares system performance of possible frequency hopping patterns against currently assigned frequency hopping pattern to optimize system performance. When a request for a link is received, a similar process as above is performed where the request is granted/denied/delayed based on system optimization requirements. In this way, the frequency hopping patterns of the links of the system may be assigned so that an optimum system performance may be obtained.
摘要翻译：本发明提供了利用来自多个基站的信息的动态跳频系统。该系统基于当前的干扰和业务环境分配跳频模式，以避免干扰，从而获得干扰平均和干扰避免的好处。该系统对终端（无线移动设备）施加较不严格的测量要求，因为通过基于从基站附近的其他基站接收的测量数据生成估计来代替许多测量要求。系统可以连续验证分配给系统的链路的跳频模式优化系统性能。该系统将可能的跳频模式的系统性能与当前分配的跳频模式进行比较，以优化系统性能。当接收到链接的请求时，执行与根据系统优化要求授予/拒绝/延迟请求的类似的过程。以这种方式，可以分配系统的链路的跳频模式，使得可以获得最佳的系统性能。

27. 发明授权

US08996148B2 Controlling gain during multipath multi-rate audio processing 有权
标题翻译：在多径多速率音频处理中控制增益
公开(公告)号：US08996148B2
公开(公告)日：2015-03-31
申请号：US13111660
申请日：2011-05-19
申请人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang
发明人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang
IPC分类号： G06F17/00 , H03G3/30 , H03G3/00
CPC分类号： H03G3/3026 , H03G3/3089
摘要： Methods and systems for processing audio signals are disclosed herein. Aspects of the method may comprise controlling gain during multipath, multi-rate audio processing by generating a digital signal that is a product of an input digital signal and a gain coefficient derived from a lookup table, and coarse tuning the gain by bit-shifting the digital signal to generate a digital output signal. The gain may be fine-tuned utilizing a variable step size determined by interpolation. The gain coefficient may be partitioned into gain blocks, which may be twice a corresponding value in preceding gain blocks. The gain blocks may be partitioned into steps that represent particular gain values within a range associated with the gain block. The digital output signal may be ramped utilizing a linear interpolation of the gain coefficients over a number of samples of the input signal, where the number of samples is given as a power of two.
摘要翻译：本文公开了用于处理音频信号的方法和系统。方法的方面可以包括通过产生作为输入数字信号和从查找表导出的增益系数的乘积的数字信号来控制多路径，多速率音频处理中的增益，以及通过位移数字信号产生数字输出信号。可以利用通过插值确定的可变步长来微调增益。增益系数可以被划分为增益块，其可以是先前增益块中相应值的两倍。增益块可以被划分为在与增益块相关联的范围内表示特定增益值的步骤。数字输出信号可以通过输入信号的多个样本的增益系数的线性内插来斜坡，其中样本数量被给出为2的幂。

28. 发明授权

US08831139B2 Method and system for delay matching in a rake receiver 有权
标题翻译：耙式接收机延时匹配的方法和系统
公开(公告)号：US08831139B2
公开(公告)日：2014-09-09
申请号：US11607438
申请日：2006-12-01
申请人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Zoran Kostic , Mark Hahm
发明人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Zoran Kostic , Mark Hahm
IPC分类号： H04B1/10 , H04B1/7115 , H04B1/7117
CPC分类号： H04B1/7115 , H04B1/7117 , H04B2201/70701
摘要： Certain aspects of a method and system for delay matching in a rake receiver are disclosed. Aspects of one method may include compensating for a delay associated with at least one or both of the following in a rake receiver: a control channel and a data channel, prior to individual processing of received data by the data channel and individual processing of received data by the control channel. The data channel or the dedicated physical channel (DPCH) may be delayed with respect to the control channel, which may comprise, for example, the common pilot control channel (CPICH), by a particular time period.
摘要翻译：公开了用于耙式接收机中的延迟匹配的方法和系统的某些方面。一种方法的方面可以包括在耙式接收机中补偿与以下中的至少一个或两者相关联的延迟：控制信道和数据信道，在数据信道对接收到的数据进行单独处理之前，以及接收数据的单独处理由控制通道。数据信道或专用物理信道（DPCH）可以相对于可以包括例如公共导频控制信道（CPICH）的控制信道延迟特定时间段。

29. 发明申请

US20120307872A1 METHOD AND SYSTEM FOR INTERFERENCE SUPPRESSION IN WCDMA SYSTEMS 有权
标题翻译： WCDMA系统干扰抑制方法与系统
公开(公告)号：US20120307872A1
公开(公告)日：2012-12-06
申请号：US13588297
申请日：2012-08-17
申请人： Mark HAHM , Wei Luo , Arkady Molev-Shteiman , Hongwei Kong , Xiao-Feng Qi , Li Fung Chang , Nelson Sollenberger
发明人： Mark HAHM , Wei Luo , Arkady Molev-Shteiman , Hongwei Kong , Xiao-Feng Qi , Li Fung Chang , Nelson Sollenberger
IPC分类号： H04B1/711 , H04B1/10
CPC分类号： H04B1/712 , H04J11/0063 , H04J13/0044 , H04J13/0048
摘要： Aspects of a method and system for interference suppression in WCDMA systems may include one or more circuits that are operable to receive a plurality of multipath signals via one or more receiving antennas. A plurality of weighting factor values may be computed based on the received multipath signals. Estimated signals may be based on the weighting factor values. Residual signals may be generated based on received signals and the estimated signals. Addback signals may be generated based on the estimated signals and the residual signals. Updated estimated signals may be generated based on the addback signals and the weighting factor values. Incremental signals may be generated based on the updated estimated signals and addback signals. Updated residual signals may be generated based on the incremental signals and previous residual signals. The interference suppressed signals may be generated based on the updated residual signals and updated estimated signals.
摘要翻译：用于WCDMA系统中的干扰抑制的方法和系统的方面可以包括可操作以经由一个或多个接收天线接收多个多径信号的一个或多个电路。可以基于接收的多路径信号来计算多个加权因子值。估计信号可以基于加权因子值。可以基于接收的信号和估计的信号来产生残余信号。可以基于估计的信号和残留信号来生成附加信号。可以基于附加信号和加权因子值来生成更新的估计信号。可以基于更新的估计信号和加法信号来产生增量信号。可以基于增量信号和先前的剩余信号来生成更新的残留信号。可以基于更新的残差信号和更新的估计信号来产生干扰抑制信号。

30. 发明申请

US20110182444A1 Method and System for Handling the Processing of Bluetooth Data During Multi-Path Multi-Rate Audio Processing 有权
标题翻译：在多路径多速率音频处理中处理蓝牙数据的方法和系统
公开(公告)号：US20110182444A1
公开(公告)日：2011-07-28
申请号：US13052349
申请日：2011-03-21
申请人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Claude Hayek , Taiyi Cheng
发明人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Claude Hayek , Taiyi Cheng
IPC分类号： H04B1/00 , G10L21/00
CPC分类号： G10L19/00
摘要： An audio codec in a baseband processor may be utilized for mixing audio signals received at a plurality of data sampling rates. The mixed audio signals may be up sampled to a very large sampling rate, and then down sampled to a specified sampling rate that is compatible with a Bluetooth-enabled device by utilizing an interpolator in the audio codec. The down-sampled signals may be communicated to Bluetooth-enabled devices, such as Bluetooth headsets, or Bluetooth-enabled devices with a USB interface. The interpolator may be a linear interpolator for which the audio codec may enable generation of triggering and/or coefficient signals based on the specified output sampling rate. An interpolation coefficient may be generated based on a base value associated with the specified output sampling rate. The audio codec may enable selecting the specified output sampling rate from a plurality of rates.
摘要翻译：基带处理器中的音频编解码器可用于混合以多个数据采样率接收的音频信号。混合音频信号可以被上采样到非常大的采样率，然后通过利用音频编解码器中的内插器而被下采样到与启用蓝牙的设备兼容的指定采样率。下采样信号可以传送到具有USB接口的支持蓝牙的设备，例如蓝牙耳机或具有蓝牙功能的设备。内插器可以是线性内插器，其中音频编解码器可以基于指定的输出采样率来实现触发和/或系数信号的产生。可以基于与指定的输出采样率相关联的基值产生内插系数。音频编解码器可以允许从多个速率中选择指定的输出采样率。

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