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公开(公告)号：US08259858B2
公开(公告)日：2012-09-04
申请号：US12512185
申请日：2009-07-30
IPC分类号： H04L25/06
CPC分类号： H04L25/06 , H03G3/3068 , H04L27/0014 , H04L27/38 , H04L27/3809 , H04L27/3863
摘要： A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and a state machine operates to detect the presence of an on-channel signal. If the signal is not detected, a mixed mode training sequence is initiated in which the DC offset errors in both an analog and digital received signal path are corrected. While training, processing of the digitized samples by a digital signal processor and a host controller is suspended (while they are put into battery save mode) and the gain provided to subsequently received signals is minimized. The DC offset correction circuitry is bypassed and put into battery save mode at predetermined periods when DC offset correction is not performed.
摘要翻译： 提出了一种在直接转换接收机中检测通道信号和同步信号检测与校正直流偏移误差的方法。 接收到的信号被数字化，并且状态机操作以检测是否存在通道信号。 如果未检测到信号，则开始混合模式训练序列，其中校正模拟和数字接收信号路径中的DC偏移误差。 在训练时，由数字信号处理器和主机控制器处理数字化采样被暂停（当它们进入电池保存模式时），并且提供给随后接收到的信号的增益被最小化。 直流偏移校正电路被旁路，并且在不执行直流偏移校正的预定周期中进入省电模式。
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公开(公告)号：US20120135725A1
公开(公告)日：2012-05-31
申请号：US12957190
申请日：2010-11-30
申请人： ELLIS A. PINDER , BRANKO L. AVANIC , LORENZO J. CRUGER , TAN V. DINH , MAHES M. EKANAYAKE , ARMANDO J. GONZALEZ , JOSEPH P. HECK , SHAKEEB Z. KHAN , JOSEPH J. MEDVID, III , WAYNE M. PHANG , CHARLES R. RUELKE , DANG N. VU , RICHARD S. YOUNG
发明人： ELLIS A. PINDER , BRANKO L. AVANIC , LORENZO J. CRUGER , TAN V. DINH , MAHES M. EKANAYAKE , ARMANDO J. GONZALEZ , JOSEPH P. HECK , SHAKEEB Z. KHAN , JOSEPH J. MEDVID, III , WAYNE M. PHANG , CHARLES R. RUELKE , DANG N. VU , RICHARD S. YOUNG
IPC分类号： H04W40/00
CPC分类号： H04W76/40
摘要： Methods of enabling late entry into an on-going spread spectrum call are described. A late join frame replaces, and has the same size as, a traffic frame. A late join slot in the late join frame contains sufficient information in preamble and sync subframes to permit a target to join the call. The traffic slots in the late join frame replicate data such that call quality of the call is substantially unaffected if one of the remaining traffic frames is not received. The preamble and sync subframes frequencies may be the same as, or different from, preamble and sync frames frequencies during a call establishment phase of the call. If different, the preamble and sync subframes frequencies are selected from one or more frequencies. Use of the preamble and sync subframes frequencies is compensated for when selecting the traffic slot frequencies to obtain uniform utilization of the spectrum.
摘要翻译： 描述了能够延迟进入正在进行的扩频呼叫的方法。 后期连接框架替换并具有与交通帧相同的大小。 晚连接帧中的延迟加入时隙包含前导码和同步子帧中足够的信息，以允许目标方加入呼叫。 后期加入帧中的业务时隙复制数据，使得如果未接收到剩余业务帧之一，则呼叫的呼叫质量基本上不受影响。 前导码和同步子帧频率可以在呼叫的呼叫建立阶段期间与前同步码和同步帧频率相同或不同。 如果不同，则从一个或多个频率中选择前同步码和同步子帧频率。 当选择业务时隙频率以获得频谱的均匀利用时，对前导码和同步子帧频率的使用进行补偿。
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3.发明授权Receiver with automatic gain control that operates with multiple protocols and method thereof 有权具有自动增益控制的接收机，其具有多种协议及其方法公开(公告)号：US07227916B2
公开(公告)日：2007-06-05
申请号：US10649427
申请日：2003-08-26
IPC分类号： H04L27/08
CPC分类号： H03G3/3078 , H03G3/001 , H03G3/3052
摘要： An automatic gain control (AGC) method and circuit (10) within a receiver uses a digital state machine (26) to implement the AGC function. independent from interaction with a host processor (36) and for multiple modulation protocols without duplicating circuitry. Modulation protocol and parameters for any of various gain responses are stored in a register (29). Multiple states, each corresponding to a predetermined range of RF input signal strength, are stored in the register. Each state contains parameters that determine a gain control signal for controlling a variable gain amplifier (16). The states are independent and may be selectively disabled to create asymmetric responses. Within any state, an adaptable number of iterations may be set to implement a different update rate or step size after a predetermined number of closed loop gain change iterations has not resulted in a transition to a state that represents a desired output gain.
摘要翻译： 接收机内的自动增益控制（AGC）方法和电路（10）使用数字状态机（26）实现AGC功能。 独立于与主处理器（36）的交互和不具有复制电路的多调制协议。 任何各种增益响应的调制协议和参数都存储在寄存器（29）中。 每个对应于RF输入信号强度的预定范围的多个状态被存储在寄存器中。 每个状态包含确定用于控制可变增益放大器（16）的增益控制信号的参数。 状态是独立的，并且可以被选择性地禁用以产生不对称响应。 在任何状态下，在预定数量的闭环增益变化迭代尚未导致转换到表示期望的输出增益的状态之后，可设置可适应数量的迭代以实现不同的更新速率或步长。
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公开(公告)号：US08971456B2
公开(公告)日：2015-03-03
申请号：US13329691
申请日：2011-12-19
IPC分类号： H04L27/06
CPC分类号： H04B1/0007 , H04B1/0071
摘要： A receiver for a wireless communication device provides a dual path receiver receiving first and second protocol-agnostic, uncorrelated receive signals simultaneously. The dual path receiver generating first and second offset IF signals from the simultaneously received first and second protocol-agnostic, uncorrelated receive signals. The receiver utilizes at least one converter for converting the first and second offset IF signals into at least one serial synchronous interface (SSI) signal representing the spectrum at IF. At least one processor receives the at least one SSI signal and applies parallel processing paths to demodulate the at least one SSI signal into separate baseband signals. The processor provides interference detection of, and level control for, the first and second offset IF signals.
摘要翻译： 用于无线通信设备的接收机提供双路径接收机同时接收第一和第二协议无关的，不相关的接收信号。 双路径接收机从同时接收的第一和第二协议无关的，不相关的接收信号产生第一和第二偏移IF信号。 接收机利用至少一个转换器将第一和第二偏移IF信号转换为表示IF处的频谱的至少一个串行同步接口（SSI）信号。 至少一个处理器接收所述至少一个SSI信号并且应用并行处理路径以将所述至少一个SSI信号解调为单独的基带信号。 处理器为第一和第二偏移IF信号提供干扰检测和电平控制。
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5.发明授权Method and apparatus for imbalance-free FM demodulation in direct conversion radio receivers 有权直接转换无线电接收机中不平衡调频解调的方法和装置公开(公告)号：US08442474B2
公开(公告)日：2013-05-14
申请号：US12844961
申请日：2010-07-28
IPC分类号： H04B1/16
CPC分类号： H04B1/30 , H03D3/009 , H03D2200/0047 , H03D2200/0082 , H03G3/3052
摘要： An apparatus and method for demodulating an FM RF signal is presented. An Adaptive Differentiate Cross Multiply (ADCM) system in which the energy estimate of the desired on-channel RF is generated using adaptive filtering. The adaptive filter includes low pass filtering of the instantaneous energy estimate. The bandwidth of the LPF is adjusted in real time based on the received signal strength energy estimate, the periodicity of any changes in the energy estimate, AGC setting for the receiver, and/or the type of sub-audible signaling applied to the RF signal if known. After the bandwidth is set, the optimum filtered energy estimate is applied to the system to demodulate the received information free from distortion artifacts associated with IQ imbalance. A normalized signal in the ADCM system is clipped by a limiter whose clipping threshold is equal to a maximum gain of differentiators in the ADCM system.
摘要翻译： 提出了一种用于解调FM RF信号的装置和方法。 自适应差分交叉乘法（ADCM）系统，其中使用自适应滤波来生成期望的同信道RF的能量估计。 自适应滤波器包括瞬时能量估计的低通滤波。 基于接收到的信号强度能量估计，能量估计的任何变化的周期性，接收机的AGC设置和/或应用于RF信号的子听觉信号的类型，实时地调整LPF的带宽 如果已知。 在设置带宽之后，将最佳滤波能量估计值应用于系统以解调所接收到的信息，而不存在与IQ失衡相关的失真伪像。 ADCM系统中的归一化信号由限幅器限幅，其限幅阈值等于ADCM系统中微分器的最大增益。
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6.发明授权High speed minimal interference adaptive tranceiver interface and method thereof 有权高速最小干扰自适应收发器接口及其方法公开(公告)号：US08331865B2
公开(公告)日：2012-12-11
申请号：US12620933
申请日：2009-11-18
申请人： Charles R. Ruelke , Raul Salvi
发明人： Charles R. Ruelke , Raul Salvi
CPC分类号： H04B3/30 , H04L25/0274
摘要： A method for minimizing undesired signal coupling from digital interface between peripherals is presented. The method includes transmitting over the interface first and second signals having a parameter ζk set by a dynamic sequencer respectively to a first and second value α1 and α2, receiving the first and second signal and generating a first and second interference metric respectively for the first and second signal. The first and second interference metrics are correlated to generate a final parameter value αf, and a transmitter is then configured to transmit a third signal over the interface with the final parameter value αf.
摘要翻译： 提出了一种用于最小化来自外围设备之间的数字接口的不需要的信号耦合的方法。 该方法包括通过接口将具有由动态定序器设置的参数ζk的第一信号和第二信号分别发送到第一和第二值α1和α2，接收第一和第二信号，并分别为第一和第二信号产生第一和第二干扰度量， 第二信号。 第一和第二干扰度量被相关联以产生最终参数值αf，然后发射机被配置为通过接口发送具有最终参数值αf的第三信号。
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7.发明授权Apparatus for receiving multiple independent RF signals simultaneously and method thereof 有权用于同时接收多个独立RF信号的装置及其方法公开(公告)号：US08320858B2
公开(公告)日：2012-11-27
申请号：US12951235
申请日：2010-11-22
IPC分类号： H04B1/04
CPC分类号： H04B1/0021 , H04B1/001
摘要： An apparatus and method for receiving and processing multiple independent, uncorrelated RF signals is presented. The apparatus includes a Hybrid-Direct Conversion Receiver incorporating front end branches, protocol-specific digital processing branches, an interference detector, a correlator, and an offset control for controlling oscillator sources. The front end branches each contain a preselector that filters received signals and a mixer that down converts the received signal to an IF offset from a reference frequency by a unique offset. The bandwidth of an IF processor is partitioned into sub-channels corresponding to the different offsets and is wider than the combination of the sub-channels. The interference detector and correlator determine whether a particular desired signal is degraded by interference signals and select a new sub-channel. This information is provided to the offset control, which adjusts a LO source coupled to the corresponding down mixer accordingly.
摘要翻译： 提出了一种用于接收和处理多个独立的，不相关的RF信号的装置和方法。 该装置包括混合直接转换接收器，其包含前端分支，协议专用数字处理分支，干扰检测器，相关器和用于控制振荡器源的偏移控制。 前端支路每个都包含用于滤波接收信号的预选器和一个将接收信号从参考频率转换为独特偏移的IF偏移的混频器。 IF处理器的带宽被划分为与不同偏移量相对应的子信道，并且比子信道的组合更宽。 干扰检测器和相关器确定特定期望信号是否被干扰信号降级并选择新的子信道。 该信息被提供给偏移控制器，该偏移控制器相应地调节耦合到相应的下混频器的LO源。
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公开(公告)号：US08169369B2
公开(公告)日：2012-05-01
申请号：US12335156
申请日：2008-12-15
CPC分类号： G01S11/02
摘要： A frequency generation unit (FGU) in a communication device includes a voltage controlled oscillator (VCO), an adjustable filter having a capacitive element for wideband operation, a current source with variable gain, and chirp generation control circuitry (CGC) that is used to generate location signals. The FGU receives, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a location signal. The CGC configures, based on the at least one location signal control parameter, the gain and a polarity of the current source to generate a first current during a first time period for charging the capacitive element to generate a control signal that is coupled to the VCO to generate a first part of the location signal having the defined linear frequency slope characteristics, wherein the first part of the location signal is transmitted using a transceiver of the communication device.
摘要翻译： 通信装置中的频率产生单元（FGU）包括压控振荡器（VCO），具有用于宽带操作的电容元件的可调整滤波器，具有可变增益的电流源和用于发送控制的线性调频电路（CGC） 生成位置信号。 FGU从参考设备接收至少一个位置信号控制参数，其定义位置信号的线性频率斜率特性。 所述CGC基于所述至少一个位置信号控制参数，配置所述电流源的增益和极性，以在第一时间段期间产生第一电流，以对所述电容元件充电以产生耦合到所述VCO的控制信号 以产生具有所定义的线性频率斜率特性的位置信号的第一部分，其中使用通信设备的收发器发送位置信号的第一部分。
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9.发明授权公开(公告)号：US08131215B2
公开(公告)日：2012-03-06
申请号：US12335031
申请日：2008-12-15
IPC分类号： H04B7/00
CPC分类号： H04W64/00 , G01S13/767
摘要： A reference device determines its distance from a communication device by first using a training process to determine a calibrated time delay for the communication device when the communication device is at a known distance from the reference device. The calibrated time delay is a steady state internal processing delay for the communication device. Subsequently, when the reference device is at an unknown distance from the communication device, the reference device determines the unknown distance using the previously determined calibrated time delay along with a measured signal travel time at the unknown distance.
摘要翻译： 参考设备通过首先使用训练过程来确定其与通信设备的距离，以便当通信设备距离参考设备已知距离时，确定通信设备的校准时间延迟。 校准的时间延迟是通信设备的稳态内部处理延迟。 随后，当参考设备距离通信设备距离未知距离时，参考设备使用先前确定的校准时间延迟以及在未知距离处的测量信号行进时间来确定未知距离。
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公开(公告)号：US20110026643A1
公开(公告)日：2011-02-03
申请号：US12512185
申请日：2009-07-30
CPC分类号： H04L25/06 , H03G3/3068 , H04L27/0014 , H04L27/38 , H04L27/3809 , H04L27/3863
摘要： A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and a state machine operates to detect the presence of an on-channel signal. If the signal is not detected, a mixed mode training sequence is initiated in which the DC offset errors in both an analog and digital received signal path are corrected. While training, processing of the digitized samples by a digital signal processor and a host controller is suspended (while they are put into battery save mode) and the gain provided to subsequently received signals is minimized. The DC offset correction circuitry is bypassed and put into battery save mode at predetermined periods when DC offset correction is not performed.
摘要翻译： 提出了一种在直接转换接收机中检测通道信号和同步信号检测与校正直流偏移误差的方法。 接收到的信号被数字化，并且状态机操作以检测是否存在通道信号。 如果未检测到信号，则开始混合模式训练序列，其中校正模拟和数字接收信号路径中的DC偏移误差。 在训练时，由数字信号处理器和主机控制器处理数字化采样被暂停（当它们进入电池保存模式时），并且提供给随后接收到的信号的增益被最小化。 直流偏移校正电路被旁路，并且在不执行直流偏移校正的预定周期中进入省电模式。
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