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21. 发明申请

US20100239050A1 METHOD AND SYSTEM FOR SIGNAL PHASE VARIATION DETECTION IN COMMUNICATION SYSTEMS 审中-公开
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：US20100239050A1
公开(公告)日：2010-09-23
申请号：US12791620
申请日：2010-06-01
申请人： Li Fung Chang , Hongwei Kong , Nelson Sollenberger
发明人： Li Fung Chang , Hongwei Kong , Nelson Sollenberger
IPC分类号： H04L27/00
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。

22. 发明申请

US20080133227A1 METHOD AND SYSTEM FOR HANDLING THE PROCESSING OF BLUETOOTH DATA DURING MULTI-PATH MULTI-RATE AUDIO PROCESSING 有权
标题翻译：在多路径多音频处理过程中处理蓝牙数据的方法和系统
公开(公告)号：US20080133227A1
公开(公告)日：2008-06-05
申请号：US11565373
申请日：2006-11-30
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： G10L19/00
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。

23. 发明申请

US20080133224A1 METHOD AND SYSTEM FOR UTILIZING RATE CONVERSION FILTERS TO REDUCE MIXING COMPLEXITY DURING MULTIPATH MULTI-RATE AUDIO PROCESSING 审中-公开
标题翻译：在多路径多音频处理过程中使用速率转换滤波器以减少混合复杂度的方法和系统
公开(公告)号：US20080133224A1
公开(公告)日：2008-06-05
申请号：US11565342
申请日：2006-11-30
申请人： Hongwei Kong , Huaiyu Zeng , Nelson Sollenberger , Li Fung Chang
发明人： Hongwei Kong , Huaiyu Zeng , Nelson Sollenberger , Li Fung Chang
IPC分类号： G10L19/00
CPC分类号： H03H17/04 , G10L19/173 , H03H17/0279 , H03H17/0444 , H03H17/06
摘要： Methods and systems for processing multipath, multi-rate digital audio signals are disclosed herein. Aspects of the method may comprise up-sampling a number of digital audio signals and converting the up-sampled digital audio signals to a common data rate prior to mixing. The digital audio signals sampling rates may be converted utilizing half-band interpolators. The up-sampling may also utilize infinite impulse response interpolators. A portion of the up-sampled digital audio signals may have a common data rate. The common data rate may be determined by the number half-band interpolators utilized. Distortion in the digital audio signals may be compensated utilizing an infinite impulse response filter or a finite impulse response filter.
摘要翻译：本文公开了用于处理多路径，多速率数字音频信号的方法和系统。方法的方面可以包括对多个数字音频信号进行上采样，并将上采样的数字音频信号在混合之前转换成公共数据速率。可以使用半带内插器来转换数字音频信号采样率。上采样也可以利用无限脉冲响应内插器。上采样的数字音频信号的一部分可以具有公共数据速率。公共数据速率可以由所使用的数量半带内插器来确定。可以使用无限脉冲响应滤波器或有限脉冲响应滤波器来补偿数字音频信号中的失真。

24. 发明申请

US20080130917A1 METHOD AND SYSTEM FOR PROCESSING MULTI-RATE AUDIO FROM A PLURALITY OF AUDIO PROCESSING SOURCES 有权
标题翻译：从多种音频处理来源处理多速音频的方法和系统
公开(公告)号：US20080130917A1
公开(公告)日：2008-06-05
申请号：US11565414
申请日：2006-11-30
申请人： Hongwei Kong , Huaiyi (Hanks) Zeng , Nelson Sollenberger , Li Fung Chang , Taiya Cheng , Claude Hayek
发明人： Hongwei Kong , Huaiyi (Hanks) Zeng , Nelson Sollenberger , Li Fung Chang , Taiya Cheng , Claude Hayek
IPC分类号： H03G3/20 , G10L19/00
CPC分类号： H04S1/007 , G10L19/18 , H04S2400/13
摘要： An audio codec in a wireless device may be utilized for up sampling two or more audio signals to a same data sampling rate. Each audio signal, such as digital audio, voice, and polyringer, for example, may be received at one of a plurality of data sampling rates. Audio signals may be equalized and/or compensated with an FIR filter before up sampling or with an IIR filter to reduce overall processing latency. Multiple half-band interpolation operations may perform the up sampling. The first half-band filter may be replaced by an IIR filter to reduce overall processing latency. A gain of the up-sampled data may be adjusted to reduce noise effects. The channels of the up-sampled audio signals may be mixed and later further up sampled for subsequent communication to an output device. The up-sampled mixed audio signals may be down sampled for communication to a Bluetooth radio.
摘要翻译：无线设备中的音频编解码器可用于将两个或多个音频信号上采样到相同的数据采样率。例如，可以以多个数据采样率中的一个接收每个音频信号，例如数字音频，语音和多声道。音频信号可以在上采样之前用FIR滤波器或IIR滤波器进行均衡和/或补偿，以减少整体处理等待时间。多个半带插值操作可以执行上采样。第一个半带滤波器可以被IIR滤波器代替，以减少整体处理等待时间。可以调整上采样数据的增益以减少噪声影响。上采样音频信号的信道可以混合并且稍后进一步上采样以便随后与输出设备进行通信。上采样混合音频信号可能被下采样以便与蓝牙无线电通信。

25. 发明授权

US07106787B2 Acquisition matched filter for W-CDMA systems providing frequency offset robustness 有权
公开(公告)号：US07106787B2
公开(公告)日：2006-09-12
申请号：US09994763
申请日：2001-11-28
申请人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
发明人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
IPC分类号： H04B1/707
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.

26. 发明授权

US08306219B2 Method and system for a ciphering interface with list processing 失效
标题翻译：具有列表处理的加密接口的方法和系统
公开(公告)号：US08306219B2
公开(公告)日：2012-11-06
申请号：US11353687
申请日：2006-02-14
申请人： Yi Zhou , Li Fung Chang , Nelson Sollenberger
发明人： Yi Zhou , Li Fung Chang , Nelson Sollenberger
IPC分类号： H04L29/06
CPC分类号： H04L9/0618 , H04L2209/12
摘要： A method and system for ciphering interface with list processing is described. Various aspects of a system for ciphering interface with list processing may include a cipher module that enables deciphering and/or bit stuffing, in hardware, of a potion of one of a plurality of data blocks starting at any bit location that is subsequent to a first bit of the one of the plurality of data blocks. One of the plurality of data blocks may comprise at least one data word. A modulus of a number representing the bit location with respect to a number of bits in the one of the data words may be a number greater than 0. The cipher module may enable selection of any bit location based on and index and/or an offset. The cipher module may enable selection of deciphering and/or bit stuffing based on configured information.
摘要翻译：描述了用列表处理加密接口的方法和系统。用于加密具有列表处理的接口的系统的各个方面可以包括密码模块，其能够在硬件中解密和/或位填充多个数据块中的一个数据块的一部分，从在第一所述多个数据块中的一个。多个数据块中的一个可以包括至少一个数据字。表示相对于数据字中的一个数据位的位数的数字的模数可以是大于0的数字。加密模块可以使得能够基于索引和/或偏移来选择任何位位置。密码模块可以使得能够基于配置的信息来选择解密和/或位填充。

27. 发明授权

US07826493B2 Frequency offset correction circuit for WCDMA 有权
标题翻译： WCDMA频偏补偿电路
公开(公告)号：US07826493B2
公开(公告)日：2010-11-02
申请号：US10228165
申请日：2002-08-26
申请人： Li Fung Chang , Nelson Sollenberger , Baoguo Yang
发明人： Li Fung Chang , Nelson Sollenberger , Baoguo Yang
IPC分类号： H04J3/06
CPC分类号： H04B1/7075 , H04B1/70735 , H04B1/708 , H04L2027/0046
摘要： Methods and apparatus for acquiring and verifying a code used by a base station. Acquisition time is reduced and circuitry simplified by performing Phase I and Phase II acquisitions in series, but in parallel with Phase III acquisition and verification, which are done in series. Phase III code acquisition is done by despreading the input signal using each of the possible codes in a code group. An estimation of the frequency offset between the base station and the terminal's local reference is used to correct the phase of the despread signals, which are coherently and non-coherently integrated. The largest accumulated value corresponds to the code used by the base station. The code is verified by despreading the received signal, applying a frequency correction, and demodulating. The demodulated output is a series of symbols, and a count of these symbols verifies the acquired code.
摘要翻译：用于获取和验证基站使用的代码的方法和装置。通过串联完成第一阶段和第二阶段的并购，但是与第三阶段采集和验证并行完成了采集时间，简化了电路。通过使用代码组中的每个可能代码解扩输入信号来完成III期代码获取。使用基站和终端本地参考之间的频率偏移的估计来校正相干和非相干积分的解扩信号的相位。最大的累积值对应于基站使用的代码。通过解扩接收信号，应用频率校正和解调来验证码。解调输出是一系列符号，并且这些符号的计数验证所获取的代码。

28. 发明授权

US07164732B2 Edge incremental redundancy support in a cellular wireless terminal 有权
标题翻译：蜂窝无线终端中的边缘增量冗余支持
公开(公告)号：US07164732B2
公开(公告)日：2007-01-16
申请号：US10731803
申请日：2003-12-09
申请人： Li Fung Chang , Nelson Sollenberger , Yongqian Wang , Aki Shohara , Yue Chen
发明人： Li Fung Chang , Nelson Sollenberger , Yongqian Wang , Aki Shohara , Yue Chen
IPC分类号： H04L27/00
CPC分类号： H04L1/0059 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0065 , H04L1/0068 , H04L1/0069 , H04L1/0071 , H04L1/1816 , H04L1/1819 , H04L1/1829 , H04L1/1835 , H04L1/1845 , H04L1/203 , H04L1/208 , H04L25/03006 , H04L25/03318 , H04L25/067 , H04L27/0008 , H04L2025/03401 , H04L2025/03407 , H04L2025/03726 , H04L2027/0038
摘要： A system for implementing Incremental Redundancy (IR) operations in a wireless receiver includes a baseband processor, an equalizer, a system processor, and an IR processing module. The baseband processor receives an analog signal corresponding to a data block and samples the analog signal to produce samples. The equalizer receives the samples from the baseband processor, equalizes the samples, and produces soft decision bits corresponding to the data block. The equalizer may be implemented as a distinct processing component or may be performed by the baseband processor or system processor. The system processor receives at least the soft decision bits and initiates IR operations. The IR processing module receives the soft decision bits of the data block and performs IR operations on the data block in an attempt to correctly decode a corresponding data block.
摘要翻译：用于在无线接收机中实现增量冗余（IR）操作的系统包括基带处理器，均衡器，系统处理器和IR处理模块。基带处理器接收对应于数据块的模拟信号，并对模拟信号进行采样以产生采样。均衡器从基带处理器接收样本，对采样进行均衡，并产生与数据块相对应的软判决位。均衡器可以被实现为不同的处理组件，或者可以由基带处理器或系统处理器执行。系统处理器至少接收软判决位，并启动IR操作。 IR处理模块接收数据块的软判决位，并对数据块执行IR操作，以试图正确解码对应的数据块。

29. 发明申请

US20090180578A1 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：US20090180578A1
公开(公告)日：2009-07-16
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： H04L27/08
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。

30. 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。

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