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公开(公告)号：US07647028B2
公开(公告)日：2010-01-12
申请号：US11100172
申请日：2005-04-06
IPC分类号： H04B1/04
CPC分类号： H01Q3/267 , H04B17/101 , H04B17/14 , H04B17/21
摘要： An internal calibration system for a radio frequency (RF) transmitter comprises a digital processing element to generate within a radio frequency (RF) transmitter test points at which an output of the RF transmitter is measured, an RF detector to measure the radio frequency output of the RF transmitter at the test points, the digital processing element also determining transmitter impairments by analyzing the measured radio frequency output, and compensation circuitry to compensate the RF transmitter for the measured impairments.
摘要翻译： 用于射频（RF）发射机的内部校准系统包括数字处理元件，用于在射频（RF）发射机内测量RF发射器的输出的测试点产生RF测量点，RF检测器测量射频 在测试点处的RF发射机，数字处理元件还通过分析测量的射频输出来确定发射机损伤，以及补偿电路来补偿RF发射机的测量损伤。
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2.发明授权Radio frequency (RF) receiver with double loop integrated fast response automatic gain control (AGC) 失效具有双回路集成快速响应自动增益控制（AGC）的射频（RF）接收机公开(公告)号：US07593484B2
公开(公告)日：2009-09-22
申请号：US11241428
申请日：2005-09-30
CPC分类号： H04L27/3809
摘要： A radio frequency (RF) receiver device comprises a receiver system that receives an analog radio frequency signal and downconverts the analog radio frequency signal to a downconverted analog signal, the receiver system further including a peak signal detector configured to determine a peak signal level of the downconverted analog signal, and an automatic gain control adjustment element configured to determine whether the peak signal level falls within a predetermined range, and configured to generate, in the RF receiver, a gain control signal controlling the gain of at least one analog component based on whether the peak signal level falls within the predetermined range.
摘要翻译： 射频（RF）接收机设备包括接收模拟射频信号并将模拟射频信号下变频为下变频模拟信号的接收机系统，所述接收机系统还包括峰值信号检测器，该峰值信号检测器被配置为确定 以及自动增益控制调整元件，被配置为确定峰值信号电平是否落在预定范围内，并且被配置为在RF接收器中产生控制至少一个模拟分量的增益的增益控制信号，该增益控制信号基于 峰值信号电平是否落在预定范围内。
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公开(公告)号：US07526265B2
公开(公告)日：2009-04-28
申请号：US11137196
申请日：2005-05-24
IPC分类号： H04B1/10
摘要： Embodiments of a receiver impairment estimation and correction system and method that can be implemented in a low intermediate frequency receiver system are disclosed. In one embodiment, among others, a method for operating a receiver is disclosed that comprises receiving a radio frequency signal, downconverting the radio frequency signal to a downconverted signal comprising an in-phase component and quadrature-phase component, buffering the downconverted signal in a memory, estimating receiver impairments associated with the in-phase component and the quadrature-phase component for a defined time period, and compensating for the receiver impairments for each defined time period.
摘要翻译： 公开了可以在低中频接收机系统中实现的接收机损害估计和校正系统和方法的实施例。 在一个实施例中，公开了一种用于操作接收机的方法，其包括接收射频信号，将射频信号下变频到包括同相分量和正交相分量的下变频信号，将下变频信号缓存在 存储器，在定义的时间段内估计与同相分量和正交相分量相关联的接收机损伤，以及补偿每个定义的时间段的接收机损伤。
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公开(公告)号：US07480349B2
公开(公告)日：2009-01-20
申请号：US10963049
申请日：2004-10-12
IPC分类号： H04L27/00
CPC分类号： H04L27/3863 , H04B1/1036 , H04B1/109 , H04B1/30
摘要： Embodiments of a low intermediate frequency system and method are disclosed. In one embodiment, among others, a method for operating a receiver is disclosed that comprises receiving a radio frequency signal, downconverting the radio frequency signal to a downconverted signal comprising an in-phase component and quadrature component, and estimating a gain and phase imbalance between the in-phase component and the quadrature component.
摘要翻译： 公开了一种低中频系统和方法的实施例。 在一个实施例中，公开了一种用于操作接收机的方法，其包括：接收射频信号，将射频信号下变频到包括同相分量和正交分量的下变频信号，以及估计无线电频率信号之间的增益和相位不平衡 同相分量和正交分量。
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5.发明授权System for reducing amplitude digital-to-analog converter (DAC) resolution in a polar transmitter 有权用于在极性发射机中降低幅度数模转换器（DAC）分辨率的系统公开(公告)号：US07187314B1
公开(公告)日：2007-03-06
申请号：US11241141
申请日：2005-09-30
申请人： Norman J. Beamish , Morten Damgaard , John E. Vasa
发明人： Norman J. Beamish , Morten Damgaard , John E. Vasa
IPC分类号： H03M1/66
摘要： A system for reducing digital-to-analog converter (DAC) resolution for an amplitude modulated signal comprises a first logic configured to determine a desired DAC output voltage range, a second logic configured to select a DAC reference voltage level corresponding to the desired DAC output voltage range, a third logic configured to select a number of digital bits for conversion to the analog domain, the number of bits chosen from a larger number of digital bits, and a DAC configured to receive the selected DAC reference voltage level and convert the selected number of digital bits to a signal in the analog domain.
摘要翻译： 用于减小幅度调制信号的数模转换器（DAC）分辨率的系统包括被配置为确定期望的DAC输出电压范围的第一逻辑，被配置为选择对应于期望的DAC输出的DAC参考电压电平的第二逻辑 电压范围，第三逻辑，被配置为选择用于转换到模拟域的多个数字位，从较大数量位选择的位数，以及被配置为接收所选择的DAC参考电压电平并将所选择的DAC 数字位数到模拟域中的信号。
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公开(公告)号：US06862313B2
公开(公告)日：2005-03-01
申请号：US10127061
申请日：2002-04-18
摘要： A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A filter has an input coupled to the analog output of the digital to analog converter. An adder has a first input coupled to the filtered output and a second input coupled to a loop control voltage generated by a phase lock loop. A VCO integrated into the phase lock loop has a control input coupled to the summed output. An RF output of the VCO produces a continuous phase frequency shift keyed spread spectrum signal in response to the digital representation of the direct sequence spread spectrums signal. A receiver converts received RF signal to baseband in-phase and quadrature that are in turn converted to digitized signals. A demodulator produces chip data that is despread using a matched filter.
摘要翻译： 无线收发器包括具有用于接收直接序列扩频信号的数字表示并具有模拟输出的输入的数模转换器。 滤波器具有耦合到数模转换器的模拟输出的输入。 加法器具有耦合到滤波输出的第一输入和耦合到由锁相环产生的回路控制电压的第二输入。 集成到锁相环中的VCO具有耦合到求和输出的控制输入。 VCO的RF输出响应于直接序列扩频信号的数字表示而产生连续相位频移键控扩频信号。 接收机将接收的RF信号转换成基带同相和正交，然后转换成数字化信号。 解调器产生使用匹配滤波器解扩的芯片数据。
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公开(公告)号：US06731747B2
公开(公告)日：2004-05-04
申请号：US09792816
申请日：2001-02-23
IPC分类号： H04M100
CPC分类号： H04B3/23
摘要： A system is disclosed for accurately detecting an alert signal. Improving detector accuracy decreases missed detects and false detects. In one example embodiment the detector monitors received telephone signals for an alert signal such as a CPE alert signal. In such a configuration, the invention processes the received signal prior to monitoring by the detector to remove or reduce unwanted echo, interference and/or other signal portions that may otherwise inhibit accurate detection of alert signals sent from a remote location. In one configuration, the invention performs echo suppression or cancellation on the received signal to eliminate or reduce echo, such as may be introduced by a hybrid.
摘要翻译： 公开了一种用于准确地检测报警信号的系统。 提高检测器精度可以减少检测误差和错误检测。 在一个示例实施例中，检测器监视接收的电话信号以获得诸如CPE警报信号的警报信号。 在这种配置中，本发明在由检测器进行监视之前处理接收到的信号，以去除或减少不必要的回波，干扰和/或其他信号部分，否则这些信号部分可能会禁止从远程位置发送的警报信号的精确检测。 在一种配置中，本发明对接收到的信号执行回波抑制或消除以消除或减少回波，例如可以由混合器引入。
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8.发明授权公开(公告)号：US06445732B1
公开(公告)日：2002-09-03
申请号：US09159328
申请日：1998-09-23
申请人： Norman J. Beamish , Robert K. Perez
发明人： Norman J. Beamish , Robert K. Perez
IPC分类号： H04B346
CPC分类号： H04B17/318
摘要： A method and apparatus which reduces the computational complexity of a receiver subject to power swings in excess of the power swings inherent in wireless communication from normal fading. To accomplish this, attenuation or some other form of signal modification occurs prior to the digital circuitry to reduce the required resolution of the analog to digital converter and other receiver components. A power signal estimator in conjunction with an attenuation control module may control the level of attenuation.
摘要翻译： 一种降低接收机的计算复杂度的方法和装置，该接收机的功率摆动超过无线通信中固有的功率摆动从正常衰落。 为了实现这一点，在数字电路之前发生衰减或某种其他形式的信号修改以减少模数转换器和其它接收机组件所需的分辨率。 与衰减控制模块结合的功率信号估计器可以控制衰减水平。
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9.发明授权公开(公告)号：US06744808B1
公开(公告)日：2004-06-01
申请号：US09325107
申请日：1999-06-03
申请人： John S. Walley , Norman J. Beamish
发明人： John S. Walley , Norman J. Beamish
IPC分类号： H04B1500
CPC分类号： H04B1/707 , H04B2201/70703
摘要： Spread spectrum technology is being used in more and more wireless applications. Generally applications of spread spectrum include a fixed spread spectrum code size. In addition in applications that employ time domain duplex, some may employ a fixed duty cycle, for example 50% broadcast and 50% receive, for broadcast and receive functions. Many applications, such as cordless phones, also feature a fixed sampling rate for an input signal. By building systems in which these variables are not fixed but variable manufacturers can make generic type spread spectrum controllers which can be used in a variety of applications. These same circuits can also be controlled to give current devices enhanced characteristics by adjusting data rate for changing conditions, thereby enhancing their performance. By allowing the spreading code to be reduced in length, the data rate of the transmitted signal can be increased without adjusting the bandwidth of the amplifiers used to amplify the transmitted signal. Similarly, more data can be transmitted or spreading code size increased by increasing the transmit duty cycle or the number of timeslices allotted to transmit the signal. The spreading code size can also be increased by using techniques, such as reduced sampling rate, which reduce the amount of data input into the system. Conversely the spreading code length can be increased in order to achieve more range, greater interference tolerance etc. by reducing the data rate or increasing the amount of time allotted to broadcast the signal.
摘要翻译： 扩频技术正在越来越多的无线应用中使用。 一般来说，扩展频谱的应用包括固定的扩频码尺寸。 此外，在采用时域双工的应用中，有些可以采用固定占空比，例如广播和接收功能的50％广播和50％接收。 许多应用，例如无绳电话，也具有用于输入信号的固定采样率。 通过构建这些变量不固定的系统，但可变制造商可以制造可用于各种应用的通用型扩频控制器。 这些相同的电路也可以被控制，以通过调整变化条件的数据速率来提供电流器件的增强特性，从而提高它们的性能。 通过允许扩展码的长度减小，可以增加发送信号的数据速率，而无需调整用于放大发送信号的放大器的带宽。 类似地，可以通过增加分配给发送信号的发射占空比或次数的数量来传输更多数据或扩展码大小增加。 也可以通过使用诸如降低采样率的技术来增加扩展码大小，这减少了输入系统的数据量。 相反，通过减少数据速率或增加分配广播信号的时间量，可以增加扩展码长度以便实现更多的范围，更大的干扰容限等。
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10.发明授权Direct conversion time division duplex radio, direct sequence spread spectrum cordless telephone 失效直接转换时分双工无线电，直接序列扩频无绳电话公开(公告)号：US06411646B1
公开(公告)日：2002-06-25
申请号：US09107733
申请日：1998-06-30
IPC分类号： H04B1500
摘要： A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A bandpass or lowpass filter has an input coupled to the analog output of the digital to analog converter and has a filtered output. An adder has a first input coupled to the filtered output and a second input coupled to a loop control voltage generated by a phase lock loop. The adder produces a summed output. A VCO integrated into the phase lock loop has a control input coupled to the summed output. An RF output of the VCO produces a continuous phase frequency shift keyed spread spectrum signal in response to the digital representation of the direct sequence spread spectrums signal.
摘要翻译： 无线收发器包括具有用于接收直接序列扩频信号的数字表示并具有模拟输出的输入的数模转换器。 带通或低通滤波器具有耦合到数模转换器的模拟输出并具有滤波输出的输入。 加法器具有耦合到滤波输出的第一输入和耦合到由锁相环产生的回路控制电压的第二输入。 加法器产生一个求和输出。 集成到锁相环中的VCO具有耦合到求和输出的控制输入。 VCO的RF输出响应于直接序列扩频信号的数字表示而产生连续相位频移键控扩频信号。
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