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11.发明授权公开(公告)号：US07729716B2
公开(公告)日：2010-06-01
申请号：US11614355
申请日：2006-12-21
申请人： William O. Camp, Jr.
发明人： William O. Camp, Jr.
IPC分类号： H04B7/00
CPC分类号： H04L27/0008 , H04L1/0025
摘要： A mobile terminal reduces power consumption when operating at a high transmit power by altering a modulation scheme used for transmitting signals over an uplink to a base station. The mobile terminal receives uplink load indications from the base station and determines it current transmit power level. Based on this information, the mobile terminal selects an appropriate modulation scheme.
摘要翻译： 移动终端通过改变用于通过上行链路传送信号到基站的调制方案，以高发射功率工作时降低功耗。 移动终端从基站接收上行链路负载指示，并确定其当前发射功率电平。 基于该信息，移动终端选择适当的调制方案。
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公开(公告)号：US07221958B2
公开(公告)日：2007-05-22
申请号：US10021378
申请日：2001-12-12
IPC分类号： H04M1/00
CPC分类号： H03H17/0225
摘要： A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA signal caused GSM radio transmissions.
摘要翻译： 延迟和加法滤波技术基本上在相对宽带接收信号中的窄带干扰点处定位一个或多个滤波器零点。 例如，该技术在去除所接收到的W-CDMA信号造成的GSM无线电传输中的相邻信道干扰方面是有用的。
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公开(公告)号：US06839549B2
公开(公告)日：2005-01-04
申请号：US09738971
申请日：2000-12-14
CPC分类号： H03F3/602 , H03F1/0266 , H03F2200/504
摘要： A radio frequency power amplifier circuit provides linear amplitude modulation of a radio frequency output signal while operating in a saturated amplification mode. The power amplifier circuit incorporates a lossy modulator that functions as a variable resistance responsive to an amplitude modulation signal. A supply voltage is coupled to the voltage supply input of the power amplifier circuit through the lossy modulator, such that the supply voltage applied to the power amplifier varies with the amplitude modulation signal. The radio frequency power amplifier circuit modulates the envelope of an RF output signal generated by saturated mode amplification of a constant envelope radio frequency input signal.
摘要翻译： 射频功率放大器电路在以饱和放大模式工作时提供射频输出信号的线性幅度调制。 功率放大器电路包括有损调制器，其响应于幅度调制信号而用作可变电阻。 电源电压通过有损调制器耦合到功率放大器电路的电压源输入，使得施加到功率放大器的电源电压随着幅度调制信号而变化。 射频功率放大器电路调制由恒定包络射频输入信号的饱和模式放大产生的RF输出信号的包络。
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14.发明授权Transmitter using input modulation for envelope restoration scheme for linear high-efficiency power amplification 失效发射机使用输入调制进行线性高效功率放大的包络恢复方案公开(公告)号：US06380802B1
公开(公告)日：2002-04-30
申请号：US09752417
申请日：2000-12-29
IPC分类号： H03F338
CPC分类号： H03F1/3247 , H03C5/00 , H03F1/02 , H03F3/2176 , H03F3/24 , H03F3/393 , H04B2001/0408 , H04B2001/045
摘要： An apparatus and method for creating an amplifier input waveform based on received phase and amplitude information from an input signal. The apparatus includes a first switch receiving phase information from a primary waveform and a second switch in communication with the first switch and the input. The second switch receives amplitude information from the primary waveform and receives the phase information from the first switch and uses the amplitude information to modulate the phase information. A secondary waveform is thus created for input to the amplifier load matching network. In this way, an amplitude modulated waveform is amplified at high efficiency, enabling application of either all or part of the phase and/or amplitude modulation at the input of the amplifier.
摘要翻译： 一种用于基于从输入信号接收的相位和幅度信息产生放大器输入波形的装置和方法。 该装置包括：第一开关，接收来自初级波形的相位信息;以及第二开关，与第一开关和输入端通信。 第二开关从主波形接收振幅信息，并从第一开关接收相位信息，并使用振幅信息来调制相位信息。 因此，创建用于输入到放大器负载匹配网络的次级波形。 以这种方式，幅度调制波形以高效率被放大，使得能够在放大器的输入处施加全部或部分相位和/或幅度调制。
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15.发明授权Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation 有权具有独立，高效率幅度调制的I / Q调制电路和方法公开(公告)号：US06194963B1
公开(公告)日：2001-02-27
申请号：US09195521
申请日：1998-11-18
IPC分类号： H03F132
CPC分类号： H04L27/368 , H03C5/00 , H04L27/361
摘要： An RF amplifier includes a phase modulator developing a phase modulated RF input signal to be transmitted. A power amplifier receives the RF input signal and amplifies the RF input signal to develop an RF output signal. An amplifier control is operatively associated with the phase modulator and the power amplifier. The amplifier control includes a memory for storing correction information correlating desired amplitude of the RF output signal relative to actual amplifier amplitude, and a control varies power amplifier supply voltage responsive to the correction information to linearize amplitude modulation in the power amplifier.
摘要翻译： RF放大器包括相位调制器，显影要传输的相位调制RF输入信号。 功率放大器接收RF输入信号并放大RF输入信号以产生RF输出信号。 放大器控制与相位调制器和功率放大器可操作地相关联。 放大器控制包括用于存储与RF输出信号相对于实际放大器幅度相关的校正信息的存储器，并且响应校正信息控制变化的功率放大器电源电压以使功率放大器中的幅度调制线性化。
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16.发明授权Reduced global positioning system receiver code shift search space for a cellular telephone system 失效减少全球定位系统接收机码移动蜂窝电话系统的搜索空间
公开(公告)号：US6070078A
公开(公告)日：2000-05-30
申请号：US950690
申请日：1997-10-15
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S19/06 , G01S19/08 , G01S19/13 , G01S19/21 , G01S19/25 , G01S19/37 , H04B7/26 , H04W64/00 , H04Q7/20
CPC分类号： G01S5/0036 , G01S19/06 , G01S19/25 , G01S5/0027 , G01S2205/008
摘要： A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.
摘要翻译： 位于蜂窝电话网络的基站的全球定位系统（GPS）接收机确定基站的位置并获得GPS星历，如果可用的话，确定定时信息。 服务器使用获得的信息来计算由GPS接收机使用的辅助信息。 基站将辅助信息发送到位于在基站的服务区内操作的蜂窝电话内的GPS接收机。 蜂窝电话GPS接收机使用辅助信息来确定蜂窝电话的位置，并且经由蜂窝电话和基站将位置信息发送到蜂窝电话网络。
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17.发明授权Phase demodulation method and apparatus for a wireless LAN, by counting the IF period 失效通过对IF周期进行计数，对无线LAN进行相位解调方法和装置
公开(公告)号：US5875212A
公开(公告)日：1999-02-23
申请号：US329363
申请日：1994-10-26
IPC分类号： G06F13/00 , H04L27/20 , H04L27/233 , H04L27/18
CPC分类号： H04L27/2337
摘要： A phase shift modulator at the transmitter has a control input connected to a binary signal source. A high frequency carrier signal is applied to a carrier signal input of the modulator. The modulated carrier signal is transmitted to a receiver where it is mixed with a local oscillator frequency. At the receiver, a modulated signal is amplified by a limit amplifier to form the received signal into square wave pulses of a uniform height. The demodulator detects when the spacing between the edges of the square wave signal change in response to the phase shift modulation at the transmitter. When the spacing between the edges of the square wave IF signal is detected to be shorter than the normal spacing for a steady IF signal with no modulation, this signifies a first binary value. A longer than normal spacing between the edges of the square wave IF signal signifies a second binary value. Frequency drift compensation circuits are disclosed to overcome frequency variations in the carrier and the local oscillator.
摘要翻译： 发射机处的相移调制器具有连接到二进制信号源的控制输入。 高频载波信号被施加到调制器的载波信号输入端。 调制载波信号被发送到与本地振荡器频率混合的接收机。 在接收机处，调制信号被限幅放大器放大，以将接收到的信号形成均匀高度的方波脉冲。 解调器检测方波信号的边缘之间的间隔何时响应于发射机的相移调制而改变。 当对于没有调制的稳定IF信号，检测到方波IF信号的边缘之间的间隔比正常间隔短时，这意味着第一个二进制值。 方波IF信号的边缘之间比正常的间隔长，表示第二二进制值。 频率漂移补偿电路被公开以克服载波和本地振荡器中的频率变化。
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公开(公告)号：US5867533A
公开(公告)日：1999-02-02
申请号：US702412
申请日：1996-08-14
IPC分类号： H04L12/28 , H04L27/233 , H04L12/413 , H04L27/18
CPC分类号： H04W74/0808 , H04L27/2332 , H04W84/12 , Y10S370/91
摘要： An apparatus and a method for detecting a carrier signal of a phase shift keyed modulated signal. A first counter circuit generates a plurality of counts, with each count being a number of cycles of a reference frequency signal occurring between two consecutive rising edges of an intermediate frequency signal. A comparison circuit compares a first count of reference frequency cycles to a second count of reference frequency cycles when a difference between an initial count of reference frequency cycles and a first predetermined number is less than a second predetermined number. The first predetermined number represents a time period of one cycle of the nominal center frequency, and the first count and the second count respectively represent time periods of first and second cycles of a pair of consecutive cycles of the intermediate frequency signal. The comparison circuit generates a difference signal when a difference between the first count and the second count is less than a third predetermined number. A second counter circuit counts cycles of the intermediate frequency signal and generates a carrier detect signal when a count of the intermediate frequency signal cycles equals a fourth predetermined number.
摘要翻译： 一种用于检测相移键控调制信号的载波信号的装置和方法。 第一计数器电路产生多个计数，每个计数是在中频信号的两个连续上升沿之间出现的参考频率信号的周期数。 当参考频率周期的初始计数与第一预定数量之间的差小于第二预定数量时，比较电路将参考频率周期的第一计数与参考频率周期的第二计数进行比较。 第一预定数字表示标称中心频率的一个周期的时间段，第一计数和第二计数分别表示中频信号的一对连续周期的第一和第二周期的时间段。 当第一计数和第二计数之间的差小于第三预定数时，比较电路产生差分信号。 第二计数器电路对中频信号的周期进行计数，并且当中频信号周期的计数等于第四预定数时产生载波检测信号。
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公开(公告)号：US08369289B2
公开(公告)日：2013-02-05
申请号：US12191798
申请日：2008-08-14
IPC分类号： H04W4/00
CPC分类号： H04W72/02 , H04L25/0224 , H04L25/03
摘要： Methods and apparatus for processing received signals in a multi-carrier system are disclosed. An exemplary method includes estimating one or more first propagation channel coefficients based on a training sequence in each of one or more first slots received over a first radio channel, equalizing signal samples from one or more second slots received over a second radio channel immediately frequency-adjacent to the first radio channel, using the first propagation channel coefficients, and demodulating user data bits from the equalized signal samples. In some embodiments, the training sequence is located at a fixed position in each of the one or more first slots and user data bits are demodulated from a directly corresponding position in each of the second slots. Improved data rates are thus achieved by constraining radio carriers in a multi-carrier system to frequency-adjacent channels and eliminating training symbols from one of the signals.
摘要翻译： 公开了一种在多载波系统中处理接收信号的方法和装置。 一种示例性方法包括基于在第一无线电信道上接收的一个或多个第一时隙中的每一个中的训练序列来估计一个或多个第一传播信道系数，来均衡来自在第二无线电信道上接收的一个或多个第二时隙的信号样本， 与第一无线电信道相邻，使用第一传播信道系数，以及从均衡信号样本中解调用户数据比特。 在一些实施例中，训练序列位于一个或多个第一时隙的每一个中的固定位置，并且用户数据位从每个第二时隙中的直接对应位置解调。 因此，通过将多载波系统中的无线电载波限制到频率相邻信道并从一个信号消除训练符号来实现改进的数据速率。
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20.发明授权Methods, systems and devices for determining the location of a mobile device based on simulcast communication signals 失效用于基于联播通信信号来确定移动设备的位置的方法，系统和设备公开(公告)号：US08339317B2
公开(公告)日：2012-12-25
申请号：US11168044
申请日：2005-06-28
申请人： William O. Camp, Jr.
发明人： William O. Camp, Jr.
IPC分类号： G01S3/02
CPC分类号： G01S5/0027 , G01S5/0205 , G01S5/14 , G01S19/25 , G01S19/46 , H04W64/00
摘要： A method for determining a position of a mobile device may include receiving a communication signal at the mobile device simulcast from a plurality of transmitters. One of the plurality of transmitters is identified based on information obtained from the received simulcast communication signal, and an identifiable signal associated with the identified one of the plurality of transmitters is received at the mobile device. A range of the identified one of the plurality of transmitters from the mobile device is determined based on the received identifiable signal.
摘要翻译： 用于确定移动设备的位置的方法可以包括在多个发射机中同时从移动设备接收通信信号。 基于从接收的联播通信信号获得的信息来识别多个发射机之一，并且在移动设备处接收与所识别的多个发射机中的一个发射机相关联的可识别信号。 基于所接收的可识别信号来确定来自移动设备的多个发射机中识别出的一个发射机的范围。
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