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公开(公告)号：US08582699B2
公开(公告)日：2013-11-12
申请号：US12698173
申请日：2010-02-02
IPC分类号： H04L27/08
CPC分类号： H03G3/3036 , H03M1/185 , H04B1/1036 , H04B17/309 , H04B17/345 , H04L27/08
摘要： Automatic gain control in a receiver. A method for controlling operating range of an analog-to-digital converter (ADC) by an automatic gain control circuit includes estimating a peak-to-average ratio corresponding to an analog signal from digital samples of the analog signal. The method includes determining a peak value corresponding to the analog signal based on the peak-to-average ratio. Further, the method includes maintaining magnitude of the analog signal at an input of the ADC and gain of the receiver based on the peak value.
摘要翻译： 接收机自动增益控制。 用于通过自动增益控制电路控制模数转换器（ADC）的操作范围的方法包括从模拟信号的数字样本估计对应于模拟信号的峰均比。 该方法包括基于峰均比来确定与模拟信号相对应的峰值。 此外，该方法包括基于峰值来维持ADC的输入处的模拟信号的幅度和接收机的增益。
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公开(公告)号：US20100119020A1
公开(公告)日：2010-05-13
申请号：US12505553
申请日：2009-07-20
摘要： An aspect of the present invention detects the presence of interference by examining an input signal received on an input path, and blanks the receiver if interference is detected. Information contained in the input signal may be recovered otherwise. In an embodiment, the duty cycle of a jamming signal is determined by examining the input signal, and a threshold strength having a positive correlation with the duty cycle is determined. If the strength of the jamming signal during the on-interval (start and end of the interference in each cycle) is greater than the threshold strength, then only the receiver is blanked. Otherwise, no blanking is performed, and only the gain of an amplifier in the path from the input path to a baseband processor is reduced. According to another aspect, one or more cycles of the interference is used to detect the start of interference and the receiver is blanked when interference is present.
摘要翻译： 本发明的一个方面通过检查在输入路径上接收到的输入信号来检测干扰的存在，如果检测到干扰，则对接收器进行空白。 包含在输入信号中的信息可以另外恢复。 在一个实施例中，通过检查输入信号来确定干扰信号的占空比，并确定与占空比正相关的阈值强度。 如果在间隔期间（每个周期的干扰的开始和结束）中的干扰信号的强度大于阈值强度，则仅接收机被消隐。 否则，不执行消隐，并且仅减少从输入路径到基带处理器的路径中的放大器的增益。 根据另一方面，使用干扰的一个或多个周期来检测干扰的开始，并且当存在干扰时接收机被消隐。
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3.发明申请Receiver Block Providing Signal Quality Information in a Communication System with Signal Constellation not Having multiple Symbols in Same Angle 审中-公开接收器块提供具有信号星座的通信系统中没有相同角度的多个符号的信号质量信息公开(公告)号：US20070030915A1
公开(公告)日：2007-02-08
申请号：US11161460
申请日：2005-08-04
CPC分类号： H04L27/22 , H04L1/206 , H04L25/067
摘要： An aspect of the present invention provides signal quality information representing the angular deviations (i.e., based on the phase angle difference between the received symbol and the corresponding decoded symbol (i.e., selected symbol point in a signal constellation)). As a result, a relatively more accurate signal quality information is provided to external component at least in systems in which the signal constellation do not have multiple symbols in the same angle. The computational complexity may also be reduced as a result.
摘要翻译： 本发明的一个方面提供了表示角度偏差的信号质量信息（即，基于接收符号和对应的解码符号之间的相位角差（即，信号星座中的所选符号点））。 结果，至少在信号星座不具有相同角度的多个符号的系统中，向外部组件提供相对更准确的信号质量信息。 结果也可能减少计算复杂度。
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公开(公告)号：US20110051639A1
公开(公告)日：2011-03-03
申请号：US12546867
申请日：2009-08-25
申请人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S. Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
发明人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S. Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
CPC分类号： H04L12/12 , H04W24/00 , H04W28/18 , H04W52/028 , H04W84/12 , H04W84/18 , H04W88/02 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/23
摘要： A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition.
摘要翻译： 基于分组的通信系统中的接收机包括可编程块和检测接收机的操作条件和通信系统的协议状态中的至少一个的检测块。 此外，接收机包括耦合到可编程块的控制电路，其根据操作条件和协议条件中的至少一个控制可编程块向一组无线电模式转变。
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公开(公告)号：US08477631B2
公开(公告)日：2013-07-02
申请号：US12546867
申请日：2009-08-25
申请人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
发明人： Sthanunathan Ramakrishnan , Bijoy Bhukania , Jawaharlal Tangudu , Sarma S Gunturi , Jaiganesh Balakrishnan , Rakesh Kumar , Abhijit Kumar Das , Yogesh Darwhekar
IPC分类号： H04B7/00
CPC分类号： H04L12/12 , H04W24/00 , H04W28/18 , H04W52/028 , H04W84/12 , H04W84/18 , H04W88/02 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/23
摘要： A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition.
摘要翻译： 基于分组的通信系统中的接收机包括可编程块和检测接收机的操作条件和通信系统的协议条件中的至少一个的检测块。 此外，接收机包括耦合到可编程块的控制电路，其根据操作条件和协议条件中的至少一个控制可编程块向一组无线电模式转变。
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公开(公告)号：US07796716B2
公开(公告)日：2010-09-14
申请号：US11828349
申请日：2007-07-26
申请人： Bijoy Bhukania , Raghu Ganesan , Naga Saty Srikanth Puvvada , Sthanunathan Ramakrishnan , Jaiganesh Balakrishnan
发明人： Bijoy Bhukania , Raghu Ganesan , Naga Saty Srikanth Puvvada , Sthanunathan Ramakrishnan , Jaiganesh Balakrishnan
CPC分类号： H04L27/2647 , H04B1/71 , H04L25/03006
摘要： A wireless device receives an input signal representing a signal of interest (e.g., one or more portions of a packet) on a wireless medium. The input signal may, in addition, contain narrowband interference signals. The wireless device removes the signal of interest from the input signal to produce a residue signal, and analyzes the residue signal to determine the presence of any interference bands in which narrowband interference signals may be present. The wireless device then removes the detected interference bands from the input signal. The residue signal may reveal the presence of interference signals, which might otherwise be hard to distinguish in the input signal. Thus, interference signals with power levels much lower than the power of the signal of interest may be detected and removed.
摘要翻译： 无线设备在无线介质上接收表示感兴趣的信号（例如，分组的一个或多个部分）的输入信号。 此外，输入信号可以包含窄带干扰信号。 无线设备从输入信号中去除感兴趣的信号以产生残余信号，并且分析残差信号以确定可能存在窄带干扰信号的任何干扰频带的存在。 无线设备然后从输入信号中去除检测到的干扰带。 残留信号可能显示干扰信号的存在，否则在输入信号中可能难以区分。 因此，可以检测和去除具有远低于感兴趣信号的功率的功率水平的干扰信号。
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7.发明申请Reliable Packet Detection In A Wireless Receiver When Packets Contain A Known Repetitive Sequence 有权当包含已知重复序列的数据包时，无线接收器中可靠的数据包检测公开(公告)号：US20080043649A1
公开(公告)日：2008-02-21
申请号：US11778105
申请日：2007-07-16
CPC分类号： H04J3/0608 , H04L7/046
摘要： A wireless receiver operating in a wireless communication environment in which a beginning of a packet contains a repetitive sequence. The wireless receiver may compute a variance (example of a measure of variations in the cross correlation values) of cross-correlation values obtained by cross correlating a received signal and a copy of the preamble sequence starting at different time instances. When a valid packet is received, the variance of the values resulting from the cross correlation is high, otherwise the variance is low. As a result packet detection is made robust, and false packet detection due to interference signals is reduced. In an embodiment, the wireless receiver is implemented in the context of WLAN 802.11 a/g network.
摘要翻译： 在无线通信环境中操作的无线接收器，其中分组的开始包含重复序列。 无线接收机可以通过将接收到的信号和从不同时间实例开始的前导序列的副本相互相关而获得的互相关值的方差（互相关值的变化的度量的示例）。 当接收到有效的分组时，由互相关产生的值的方差较大，否则方差较小。 结果，包检测变得坚固，并且减少了由于干扰信号引起的假包检测。 在一个实施例中，无线接收机在WLAN 802.11a / g网络的上下文中实现。
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公开(公告)号：US09042487B2
公开(公告)日：2015-05-26
申请号：US13584804
申请日：2012-08-13
CPC分类号： H04L27/3863 , H04B1/0039
摘要： Apparatus and methods disclosed herein perform gain, clipping, and phase compensation in the presence of I/Q mismatch in quadrature RF receivers. Gain and phase mismatch are exacerbated by differences in clipping between I & Q signals in low resolution ADCs. Signals in the stronger channel arm are clipped differentially more than weaker signals in the other channel arm. Embodiments herein perform clipping operations during iterations of gain mismatch calculations in order to balance clipping between the I and Q channel arms. Gain compensation coefficients are iteratively converged, clipping levels are established, and data flowing through the network is gain and clipping compensated. A compensation phase angle and phase compensation coefficients are then determined from gain and clipping compensated sample data. The resulting phase compensation coefficients are applied to the gain and clipping corrected receiver data to yield a gain, clipping, and phase compensated data stream.
摘要翻译： 在正交RF接收机中存在I / Q失配的情况下，本文公开的装置和方法执行增益，限幅和相位补偿。 由于低分辨率ADC中I＆Q信号之间的限幅差异，增益和相位失配加剧。 更强的信道臂中的信号比另一个信道臂中的较弱的信号差分地被削波。 本文实施例在增益失配计算的迭代期间执行削波操作，以平衡I和Q通道臂之间的限幅。 增益补偿系数迭代收敛，建立限幅电平，流经网络的数据得到增益和限幅补偿。 然后从增益和削波补偿采样数据确定补偿相位角和相位补偿系数。 所得到的相位补偿系数被应用于增益和限幅校正的接收机数据，以产生增益，限幅和相位补偿的数据流。
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公开(公告)号：US20120250666A1
公开(公告)日：2012-10-04
申请号：US13075721
申请日：2011-03-30
申请人： Bijoy Bhukania
发明人： Bijoy Bhukania
CPC分类号： H04W88/10 , H04L1/0003 , H04L5/16 , H04L27/0008 , H04L27/2601 , H04L27/3405 , H04W28/04 , H04W84/12 , H04W88/06
摘要： Dual band wireless local area network (WLAN) transceiver. A wireless communication device includes at least two different transceivers (or radios) therein to effectuate communications with other wireless communication devices using at least two respective frequency bands. Each of these two transceivers may have different respective circuitry (e.g., each may have a different respective power amplifier (PA) and/or other circuitry components). Coordination is made regarding when certain components of one transceiver turn on and operate when another transceiver may be transmitting or receiving communications. For example, the turn on of a PA and/or other circuitry components (e.g., such as components using or requiring high current) within one transceiver can be coordinated as to minimize deleterious effects regarding the operation of another transceiver. Moreover, latency existent within each of the respective transceiver chains within the wireless communication device (e.g., including baseband and radio portions) is accounted for regarding their respective concurrent operation.
摘要翻译： 双频无线局域网（WLAN）收发器。 无线通信设备在其中包括至少两个不同的收发器（或无线电），以使用至少两个相应的频带来实现与其他无线通信设备的通信。 这两个收发器中的每一个可以具有不同的相应电路（例如，每个可以具有不同的相应功率放大器（PA）和/或其他电路部件）。 协调当一个收发器的某些组件在另一个收发器可能正在发送或接收通信时打开并操作。 例如，可以协调在一个收发器内的PA和/或其他电路组件（例如，使用或要求高电流的组件）的导通，以最小化关于另一收发器的操作的有害影响。 此外，关于无线通信设备内的每个相应收发器链（例如，包括基带和无线电部分）内存在的等待时间与它们各自的并行操作有关。
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10.发明申请SINGLE RF RECEIVER CHAIN ARCHITECTURE FOR GPS, GALILEO AND GLONASS NAVIGATION SYSTEMS, AND OTHER CIRCUITS, SYSTEMS AND PROCESSES 有权用于GPS，GALILEO和GLONASS导航系统及其他电路，系统和过程的单个RF接收链链路架构公开(公告)号：US20120026039A1
公开(公告)日：2012-02-02
申请号：US12897039
申请日：2010-10-04
CPC分类号： G01S19/33 , G01S19/37 , H04B1/0085
摘要： A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands. Other receivers, circuits.
摘要翻译： 用于多个频带接收的无线接收器包括具有RF带通的单个接收射频（RF）电路（160,170），其基本上限制为在RF处包含至少两个非重叠的这样的频带，单个同相和正交 具有IF通带的中频（IFI）部分（IFI）部分（120I，120Q）以及包括同相和正交（I，Q）对混频器（110I，110Q）的混频器电路 ），并且具有分别耦合到所述混频器（110I，110Q）的同相和正交输出的本地振荡器（100），所述混频器电路（110）可操作地注入并基本上重叠 至少两个非重叠频带彼此分配到IF通带中的IQ IF部分（120I，120Q）中，IF通带基本上限于包含由此重叠的频带的带宽。 其他接收器，电路。
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