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1. 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。

2. 发明授权

US07342956B2 System and method to extract uplink status flag bits in a cellular wireless network 有权
标题翻译：提取蜂窝无线网络中的上行链路状态标志位的系统和方法
公开(公告)号：US07342956B2
公开(公告)日：2008-03-11
申请号：US10749492
申请日：2003-12-31
申请人： Li Fung Chang , Baoguo Yang , Nelson Sollenberger
发明人： Li Fung Chang , Baoguo Yang , Nelson Sollenberger
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04W74/006 , H04L1/0003 , H04L1/0009 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/0068 , H04L1/0071 , H04L1/0079 , H04L1/0091 , H04L25/03318 , H04L27/0012 , H04W28/18 , H04W74/0833 , Y02D70/1222 , Y02D70/1224 , Y02D70/1226 , Y02D70/23
摘要： Determining whether a first wireless terminal may transmit on an uplink to a servicing base station in a cellular wireless communication system includes first receiving a plurality of a Radio Frequency (RF) bursts at a wireless terminal from a servicing base station. These RF bursts carry a data block containing both Uplink Status Flag (USF) bits and Data bits. Data bits may or may not be intended for the receiving wireless terminal. The RF bursts are processed to produce the data block in an encoded format. This data block is then partially decoded to extract the USF bits when the data bits are not intended for the receiving wireless terminal. These USF bits determine when the receiving wireless terminal can transmit or uplink to the servicing base station. The partial decoding may be halted once the USF bits have been extracted from the received data block to reduce power consumption and processing requirements.
摘要翻译：确定在蜂窝无线通信系统中第一无线终端是否可以在上行链路上向服务基站发送包括首先从服务基站在无线终端处接收多个射频（RF）突发。这些RF脉冲串携带包含上行链路状态标志（USF）位和数据位的数据块。数据位可能或可能不适用于接收无线终端。 RF脉冲串被处理以产生编码格式的数据块。然后，当数据位不用于接收无线终端时，该数据块被部分解码以提取USF位。这些USF位确定接收无线终端何时可以向服务基站发送或上行链路。一旦从接收到的数据块中提取了USF位，就可以停止部分解码，以减少功耗和处理要求。

3. 发明授权

US08103022B2 Method and system for detecting, and controlling power for, an auxiliary microphone 有权
标题翻译：用于检测和控制辅助麦克风的电源的方法和系统
公开(公告)号：US08103022B2
公开(公告)日：2012-01-24
申请号：US11565576
申请日：2006-11-30
申请人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Andy Tong , Todd L. Brooks , Claude Hayek
发明人： Hongwei Kong , Nelson Sollenberger , Li Fung Chang , Andy Tong , Todd L. Brooks , Claude Hayek
IPC分类号： H04R3/00 , H04B1/38
CPC分类号： H04R5/04 , H04R2420/01 , H04R2420/07 , H04R2499/11
摘要： Methods and systems for detecting, and controlling power for, an auxiliary microphone are disclosed. Aspects of one method may include a detection block intermittently enabling a bias circuit block to provide a bias signal to determine if an auxiliary microphone may be communicatively coupled to a mobile device. The detection block may process 1-bit digital samples received from the bias circuit bock to determine whether the auxiliary microphone may be communicatively coupled. The detection block may also process the 1-bit digital samples to determine if a button associated with the auxiliary microphone may have been pushed or activated.
摘要翻译：公开了用于检测和控制辅助麦克风的功率的方法和系统。一种方法的方面可以包括间歇地使得偏置电路块提供偏置信号以确定辅助麦克风是否可通信地耦合到移动设备的检测块。检测块可以处理从偏置电路块接收的1位数字样本，以确定辅助麦克风是否可以通信耦合。检测块还可以处理1位数字样本，以确定与辅助麦克风相关联的按钮是否可能被推动或激活。

4. 发明申请

US20110222711A1 CONTROLLING GAIN DURING MULTIPATH MULTI-RATE AUDIO PROCESSING 有权
标题翻译：在多路径多音频处理中控制增益
公开(公告)号：US20110222711A1
公开(公告)日：2011-09-15
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： 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。该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对输入信号的多个样本的增益系数的线性内插来斜坡，其中样本数量被给予为2的幂。

5. 发明授权

US07949419B2 Method and system for controlling gain during multipath multi-rate audio processing 有权
标题翻译：多径多速率音频处理中控制增益的方法和系统
公开(公告)号：US07949419B2
公开(公告)日：2011-05-24
申请号：US11565358
申请日：2006-11-30
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 , H03G3/00 , H04B1/06 , H04B7/00
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 via a digital gain circuit, a digital signal that is a product of an input digital signal and a gain coefficient derived from a lookup table, and bit-shifted to generate a digital output signal. The gain coefficient may be partitioned into a number of gain blocks. The gain values in each of the gain blocks may be twice a corresponding value in each preceding gain block. 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 one step apart over a number of samples of the digital 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。该方法的方面可以包括通过经由数字增益电路产生多径，多速率音频处理中的增益，作为输入数字信号的乘积的数字信号和从查找表导出的增益系数，以及位移以产生数字输出信号。增益系数可以被划分成多个增益块。每个增益块中的增益值可以是每个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对数字输入信号的数量样本间隔一步的增益系数的线性内插来斜坡，其中样本数量被给予为2的幂。

6. 发明授权

US07729454B2 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：US07729454B2
公开(公告)日：2010-06-01
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： 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。

7. 发明申请

US20090098902A1 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：US20090098902A1
公开(公告)日：2009-04-16
申请号：US12250233
申请日：2008-10-13
申请人： Hongwei Kong , Huaiyi (Hanks) Zeng , Nelson Sollenberger , Li Fung Chang , Taiyi Cheng , Claude Hayek
发明人： Hongwei Kong , Huaiyi (Hanks) Zeng , Nelson Sollenberger , Li Fung Chang , Taiyi Cheng , Claude Hayek
IPC分类号： H04M1/00 , H04B1/00
CPC分类号： H04S1/007 , G10L19/18 , H04S2400/13
摘要： One or more circuits in a mobile phone 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 and one or more of the following wireless standards: WCDMA, HSDPA, GSM, GPRS, EDGE, and/or Bluetooth. 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.
摘要翻译：移动电话中的一个或多个电路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。可以以多种数据采样率和以下无线标准中的一种或多种以下无线标准中的一种来接收每个音频信号，例如数字音频，话音和多声道，WCDMA，HSDPA，GSM，GPRS，EDGE和 /或蓝牙。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。

8. 发明申请

US20080132190A1 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：US20080132190A1
公开(公告)日：2008-06-05
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
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。

9. 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.

10. 发明授权

US09286900B2 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处理的方法和系统
公开(公告)号：US09286900B2
公开(公告)日：2016-03-15
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： G10L19/00 , H04J3/22
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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