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1.发明授权公开(公告)号：US07262724B2
公开(公告)日：2007-08-28
申请号：US11095910
申请日：2005-03-31
IPC分类号： H03M1/00
摘要： Techniques for adjusting the dynamic range of an A/D converter in response to various conditions are disclosed. A value output by the A/D converter is utilized to determine if the A/D converter is operating at or above its current dynamic range capabilities (i.e., the A/D converter is potentially “saturated” at its current dynamic range setting). If potentially saturated, the dynamic range of the A/D converter may be increased. If not, the dynamic range of the A/D converter may be decreased or may be unchanged. Alternately, an upcoming or enacted change in the gain settings of one or more gain stages that condition the analog signal input to an A/D converter may be used as a condition that results in an adjustment to the dynamic range of the A/D converter.
摘要翻译： 公开了响应于各种条件来调整A / D转换器的动态范围的技术。 由A / D转换器输出的值用于确定A / D转换器是否在其当前动态范围能力以上（即，A / D转换器在其当前动态范围设置下潜在地“饱和”）。 如果潜在饱和，则A / D转换器的动态范围可能会增加。 如果不是，则A / D转换器的动态范围可以减小或者可以不变。 或者，可以使用将模拟信号输入到A / D转换器进行调节的一个或多个增益级的增益设置中的即将到来的或已经颁布的改变作为导致对A / D转换器的动态范围进行调整的条件 。
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2.发明授权公开(公告)号：US07324616B2
公开(公告)日：2008-01-29
申请号：US10790168
申请日：2004-03-01
IPC分类号： H03D1/04
CPC分类号： H04B1/1036
摘要： A narrowband interference cancellation system, method and digital signal processor is disclosed that removes narrowband interference in wide band communication systems. The system includes a narrowband processing component, wideband processing component, soft metric generator and at least one filter. The system is configured to receive a signal, identify one or more narrowband interferers in the received signal and filter out identified narrowband interferers. The narrowband processing component includes a filter bank configured to separate the received signal into a predetermined number of channel bands and identify a band with interference. The wide band processing component provides an average level for an unfiltered version of the received signal. The soft decision metric generator produces metrics based on predetermined thresholds. The filters receive coefficients that are determined using outputs from the soft decision metric generator that are first averaged using long term integrators and then stored in lookup tables.
摘要翻译： 公开了一种在宽带通信系统中消除窄带干扰的窄带干扰消除系统，方法和数字信号处理器。 该系统包括窄带处理组件，宽带处理组件，软度量发生器和至少一个过滤器。 该系统被配置为接收信号，识别接收到的信号中的一个或多个窄带干扰信号并且滤除所识别的窄带干扰信号。 窄带处理部件包括滤波器组，被配置为将接收的信号分离成预定数量的信道频带并且识别具有干扰的频带。 宽带处理组件为接收信号的未滤波版本提供平均电平。 软判决度量发生器基于预定阈值产生指标。 滤波器接收使用来自软判决度量发生器的输出确定的系数，其首先使用长期积分器进行平均，然后存储在查找表中。
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公开(公告)号：US07486941B2
公开(公告)日：2009-02-03
申请号：US11099278
申请日：2005-04-04
IPC分类号： H04B1/26
CPC分类号： H03G1/0088 , H03G3/3068
摘要： Dynamic gain and phase compensation is provided in a radio frequency (RF) receiver (106) including at least one switched Low Noise Amplifier (LNA) (212) coupled to an RF gain control unit (226) providing a gain control signal to the at least one switched LNA (212) for control thereof. The RF receiver also includes an analog-to-digital (A/D) converter (222) for digitizing the RF signal and outputting an N-bit digital signal to the RF gain control unit (226). The method for gain compensation includes dynamically adjusting the N-bit digital signal to compensate for the at least one switched LNA (212) in response to the gain control signal. The method for phase compensation includes dynamically normalizing the N-bit digital signal into an M-bit signal range to derive an M-bit digital signal, where M≦N and dynamically phase adjusting the M-bit digital signal to compensate for the at least one switched LNA (212) in response to the gain control signal.
摘要翻译： 在包括耦合到RF增益控制单元（226）的至少一个切换低噪声放大器（LNA）（212））的射频（RF）接收机（106）中提供动态增益和相位补偿，该RF增益控制单元（226）提供增益控制信号 至少一个用于控制的切换LNA（212）。 RF接收机还包括用于数字化RF信号并将N位数字信号输出到RF增益控制单元（226）的模拟（A / D）转换器（222）。 用于增益补偿的方法包括动态调整N位数字信号，以响应于增益控制信号来补偿至少一个开关LNA（212）。 用于相位补偿的方法包括将N位数字信号动态归一化为M位信号范围以导出M位数字信号，其中M <= N并动态相位调整M位数字信号以补偿at 至少一个切换LNA（212）响应于增益控制信号。
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4.发明授权Method and apparatus for automatic simulcast correction for a correlation detector 失效用于相关检测器的自动联播校正的方法和装置公开(公告)号：US06571083B1
公开(公告)日：2003-05-27
申请号：US09306663
申请日：1999-05-05
申请人： Clinton C Powell, II , James David Hughes , Chun-Ye Susan Chang , Christopher T. Thomas , Mahibur Rahman , Edgar Herbert Callaway, Jr. , James A. Kimball
发明人： Clinton C Powell, II , James David Hughes , Chun-Ye Susan Chang , Christopher T. Thomas , Mahibur Rahman , Edgar Herbert Callaway, Jr. , James A. Kimball
IPC分类号： H04B100
CPC分类号： H04W88/022
摘要： An automatic simulcast correction method (300) for a selective call receiver (100) includes the steps of measuring a received signal (304) for a received signal strength indication measurement and then determining if a protocol indicates a simulcast signal (310). If the received signal strength indication measurement is above a predefined threshold and the protocol indicates the simulcast signal, then the selective call receiver is optimized for simulcast delay spread distortion (312). If the received signal strength indication measurement is below a predefined threshold or the protocol does not indicate the simulcast signal, then the selective call receiver is optimized for static sensitivity (314).
摘要翻译： 用于选呼接收机（100）的自动同步播放校正方法（300）包括以下步骤：测量接收信号强度指示测量的接收信号（304），然后确定协议是否指示同播信号（310）。 如果接收到的信号强度指示测量值高于预定阈值，并且协议指示同播信号，则选择呼叫接收机被优化用于联播延迟扩展失真（312）。 如果接收到的信号强度指示测量值低于预定阈值，或该协议不指示同播信号，则选择呼叫接收机针对静态灵敏度进行了优化（314）。
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公开(公告)号：US07937058B2
公开(公告)日：2011-05-03
申请号：US11550534
申请日：2006-10-18
IPC分类号： H04B1/10
CPC分类号： H04B1/30 , H03H11/1256 , H03H11/1291 , H03H2210/012 , H03H2210/015 , H03H2210/025 , H03H2210/036
摘要： A digital tuning system (250) for changing a cutoff frequency of an analog filter (132) includes digital synthesizers (292 and 294) for producing a two-tone calibration signal (196) applied to an input of the filter after a quality factor of the filter is increased. The filter includes at least one R/C circuit with two resistors (304 and 306) for changing the quality factor and arrays (308 and 310) of capacitors for changing the cutoff frequency. The amplitude of the magnitude responses (409 and 411) of the filter to each tone (405 and 407) is measured by a two discrete Fourier transform single-frequency bin power detection circuits (253 and 254) while the filter is sequenced through a plurality of capacitance settings. An optimal capacitance for the R/C circuit is selected by comparing, to a pre-selected value, a difference between the responses of the filter to each tone, for each capacitance setting.
摘要翻译： 用于改变模拟滤波器（132）的截止频率的数字调谐系统（250）包括数字合成器（292和294），用于产生应用于滤波器的输入的双色调校信号（196） 过滤器增加。 滤波器包括至少一个R / C电路，其具有用于改变用于改变截止频率的电容器的品质因数和阵列（308和310）的两个电阻器（304和306）。 滤波器对每个音调（405和407）的幅度响应（409和411）的幅度通过两个离散的傅里叶变换单频率二次谐波频域功率检测电路（253和254）来测量，而滤波器通过多个 的电容设置。 对于每个电容设置，通过将滤波器的响应与每个音调的差值与预选值进行比较来选择R / C电路的最佳电容。
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公开(公告)号：US07693191B2
公开(公告)日：2010-04-06
申请号：US11691301
申请日：2007-03-26
IPC分类号： H04J3/06
CPC分类号： H04B1/707 , H04L1/0027 , H04L27/0008 , H04L27/0012
摘要： An apparatus (200) and method (300) for receiving a communications signal. A spread spectrum signal demodulator (210) is adapted to demodulate a packet header (110) of a data packet (102) that is communicated by a wireless communications signal. The packet header (110) is modulated with a spread spectrum technique and the spread spectrum signal demodulator (210) produces a packet header detection signal (220) representing a successful detection of a predefined packet header value. A non-spread spectrum signal demodulator (212) is communicatively coupled to the spread spectrum signal demodulator (210) and demodulates, in response to the packet header detection signal (220), a non-spread spectrum modulated data payload within the data packet. A data output select (234) produces demodulated data produced by either one or both the spread spectrum signal demodulator (210) and the non-spread spectrum signal demodulator (212).
摘要翻译： 一种用于接收通信信号的装置（200）和方法（300）。 扩频信号解调器（210）适于解调通过无线通信信号传送的数据分组（102）的分组报头（110）。 分组报头（110）用扩展频谱技术进行调制，扩展频谱信号解调器（210）产生表示成功检测预定分组报头值的分组报头检测信号（220）。 非扩展频谱信号解调器（212）通信地耦合到扩展频谱信号解调器（210），并且响应于分组报头检测信号（220）解调数据分组内的非扩展频谱调制数据有效载荷。 数据输出选择（234）产生由扩频信号解调器（210）和非扩频信号解调器（212）中的一个或两者产生的解调数据。
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7.发明授权公开(公告)号：US07436919B2
公开(公告)日：2008-10-14
申请号：US11097577
申请日：2005-04-01
申请人： Mahibur Rahman , Emilio J. Quiroga
发明人： Mahibur Rahman , Emilio J. Quiroga
IPC分类号： H04L7/00
CPC分类号： H04L7/0338 , H04L7/04
摘要： Methods, devices and systems are provided for bit synchronizing multiple serial bitstreams (106) with a common clock signal (116). Activity occurring in each bitstream is detected (304) for each of a plurality of phases corresponding to cycles of the common clock signal. One of the plurality of phases is selected (308) for each of the serial bitstreams based upon the activity detected within the selected phase. Data is then extracted (322) from the selected phase for each of the serial bitstreams using the common clock signal to thereby bit synchronize each of the plurality of serial bitstreams to each other.
摘要翻译： 提供方法，装置和系统用于将多个串行位流（106）与公共时钟信号（116）进行位同步。 对于与公共时钟信号的周期相对应的多个相位中的每一个，检测出每个比特流中发生的活动（304）。 基于在所选择的相位内检测到的活动，为每个串行比特流选择多个相位中的一个（308）。 然后使用公共时钟信号从针对每个串行比特流的所选择的相位提取数据（322），从而将多个串行比特流中的每一个相互同步。
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公开(公告)号：US20080240166A1
公开(公告)日：2008-10-02
申请号：US11691301
申请日：2007-03-26
IPC分类号： G06E1/00
CPC分类号： H04B1/707 , H04L1/0027 , H04L27/0008 , H04L27/0012
摘要： An apparatus (200) and method (300) for receiving a communications signal. A spread spectrum signal demodulator (210) is adapted to demodulate a packet header (110) of a data packet (102) that is communicated by a wireless communications signal. The packet header (110) is modulated with a spread spectrum technique and the spread spectrum signal demodulator (210) produces a packet header detection signal 220 representing a successful detection of a predefined packet header value. A non-spread spectrum signal demodulator (212) is communicatively coupled to the spread spectrum signal demodulator (210) and demodulates, in response to the packet header detection signal (212), a non-spread spectrum modulated data payload within the data packet. A data output select (234) produces demodulated data produced by either one of both the spread spectrum signal demodulator (210) or the non-spread spectrum signal demodulator (212).
摘要翻译： 一种用于接收通信信号的装置（200）和方法（300）。 扩频信号解调器（210）适于解调通过无线通信信号传送的数据分组（102）的分组报头（110）。 分组报头（110）用扩展频谱技术进行调制，扩展频谱信号解调器（210）产生表示预定分组报头值成功检测的分组报头检测信号220。 非扩展频谱信号解调器（212）通信地耦合到扩展频谱信号解调器（210），并响应于分组报头检测信号（212）解调数据分组内的非扩展频谱调制数据有效载荷。 数据输出选择（234）产生由扩频信号解调器（210）或非扩频信号解调器（212）中的任一个产生的解调数据。
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9.发明授权Method and apparatus for compensating for variations in a receive portion of a wireless communication device 有权用于补偿无线通信设备的接收部分中的变化的方法和装置公开(公告)号：US07385913B2
公开(公告)日：2008-06-10
申请号：US10131660
申请日：2002-04-24
CPC分类号： H04L25/03133 , H04L2025/0377
摘要： A generator (304) generates first and second training signals (320, 318) that originate within a wireless communication device (FIG. 3) instead of being received from a source outside the device. A receive portion (212, 214, 216) of the device processes the first training signal to derive a processed training signal. An adaptive equalizer (310) equalizes the processed training signal to derive an equalized training signal. A processor (312) compares the equalized training signal and the second training signal using an adaptive algorithm to derive coefficients for the adaptive equalizer to compensate for variations in the receive portion, and adjusts the adaptive equalizer in accordance with the coefficients to derive a compensated output signal.
摘要翻译： 发生器（304）生成起始于无线通信设备（图3）的第一和第二训练信号（320,318），而不是从设备外部的源接收。 设备的接收部分（212,214,216）处理第一训练信号以导出经处理的训练信号。 自适应均衡器（310）对经处理的训练信号进行均衡以导出均衡的训练信号。 处理器（312）使用自适应算法比较均衡的训练信号和第二训练信号，以导出自适应均衡器的系数以补偿接收部分的变化，并且根据系数调整自适应均衡器以导出补偿的输出 信号。
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10.发明授权公开(公告)号：US07346317B2
公开(公告)日：2008-03-18
申请号：US11099179
申请日：2005-04-04
IPC分类号： H04B1/04
CPC分类号： H04B1/04 , H04B2001/0416
摘要： Methods and apparatus are provided for gain and phase compensation in a radio frequency (RF) transmitter (108). The RF transmitter (108) has at least one power amplifier (PA) (205) for providing a transmitted signal having a signal power therefrom. An RF power detector (208) is coupled to the at least one PA (205) for detecting the signal power of the transmitted signal and an analog to digital (A/D) converter (210) is coupled to the RF power detector (208). A hysteresis unit (214) is coupled to the A/D converter (210) for generating a pulse (222) in response to a power threshold being crossed and a load switch control unit (218, 232) is coupled to the hysteresis unit and the at least one power amplifier for providing gain and phase compensation in response to the pulse.
摘要翻译： 在射频（RF）发射机（108）中提供用于增益和相位补偿的方法和装置。 RF发射器（108）具有至少一个功率放大器（PA）（205），用于从其提供具有信号功率的发射信号。 RF功率检测器（208）耦合到至少一个PA（205），用于检测发射信号的信号功率，并且模数（A / D）转换器210耦合到RF功率检测器208 ）。 滞后单元（214）耦合到A / D转换器（210），用于响应于正在交叉的功率阈值产生脉冲（222），并且负载开关控制单元（218,232）耦合到迟滞单元， 所述至少一个功率放大器用于响应于脉冲提供增益和相位补偿。
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