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111.发明授权Method and apparatus for transmit power modulation in a wireless communications system 有权无线通信系统中发射功率调制的方法和装置公开(公告)号：US06873831B2
公开(公告)日：2005-03-29
申请号：US10113283
申请日：2002-04-01
CPC分类号： H04B7/0615 , H04B7/0491 , H04B7/0617
摘要： An apparatus according to one embodiment of the invention includes a transmitter. The transmitter receives an RF signal and produces at least two modulated signals based on the RF signal. Each of the modulated signals is coupled to a respective antenna. The combined radiation pattern of the antennas varies in an angular direction over time. In a system according to one embodiment of the invention, a base station including such an apparatus receives channel quality indications from mobile units and schedules data transmissions to the mobile units accordingly.
摘要翻译： 根据本发明的一个实施例的装置包括发射器。 发射机接收RF信号并且基于RF信号产生至少两个调制信号。 每个调制信号被耦合到相应的天线。 天线的组合辐射图随着时间在角度方向上变化。 在根据本发明的一个实施例的系统中，包括这种装置的基站从移动单元接收信道质量指示并相应地调度到移动单元的数据传输。
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112.发明授权Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system 有权用于在CDMA通信系统中对来自多个基站的传输进行时间调整的方法和装置公开(公告)号：US06775242B2
公开(公告)日：2004-08-10
申请号：US09901831
申请日：2001-07-09
IPC分类号： G01R3108
CPC分类号： H04W56/002 , H04B7/2668 , H04B2201/70702 , H04W56/001 , H04W56/0015 , H04W56/0045 , H04W92/20
摘要： Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).
摘要翻译： 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。
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113.发明授权公开(公告)号：US06625197B1
公开(公告)日：2003-09-23
申请号：US09182367
申请日：1998-10-27
IPC分类号： H04B169
CPC分类号： H04B1/7117 , H04B1/712 , H04B2201/70707
摘要： Multipath RAKE receiver structure that allows for the concurrent demodulation of multipath signals that arrive at the receiver at arbitrarily low arrival time differences. The fingers are set to be a fixed offset from one another. One finger tracks the shift in the peak of the multipath component and the additional fixed offset fingers follow the tracking.
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114.发明授权Method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system 有权用于在码分多址通信系统中发起切换的有效候选频率搜索的方法和装置公开(公告)号：US06597922B1
公开(公告)日：2003-07-22
申请号：US09312262
申请日：1999-05-14
申请人： Fuyun Ling , Jack Holtzman , Charles E. Wheatley, III , Tao Chen , Edward G. Tiedemann , Gilbert Leung
发明人： Fuyun Ling , Jack Holtzman , Charles E. Wheatley, III , Tao Chen , Edward G. Tiedemann , Gilbert Leung
IPC分类号： H04B700
CPC分类号： H04W52/225 , H04W36/0094 , H04W52/40 , H04W52/42
摘要： A method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system. The method includes when the pilot signal is transmitted by the mobile station that is power controlled to a target receive level, the traffic channel power level is increased relative to the pilot channel to improve receiver performance. An improved feature is that the received pilot received at the base station stays the same while the receiver receives extra energy in the redundant traffic symbols received to enhance the probability of correctly decoding the received frame. The base station detects the absence of the mobile station transmitted signal from the frequency of interest. If the base station is aware of the starting time and duration of the absence, it can focus its detection during this predetermined time period. The performance can be improved if the absence of the signal is spread across two frames at the frame boundary.
摘要翻译： 一种用于在码分多址通信系统中发起切换的有效候选频率搜索的方法和装置。 该方法包括当导频信号由被功率控制到目标接收电平的移动台发送时，业务信道功率电平相对于导频信道增加，以提高接收机性能。 改进的特征是在基站处接收到的接收到的导频保持相同，而接收机在接收到的冗余业务符号中接收到额外的能量以增强正确解码接收帧的概率。 基站从感兴趣的频率检测到不存在移动台发送的信号。 如果基站知道不存在的起始时间和持续时间，则可以在该预定时间段内集中其检测。 如果没有信号在帧边界的两个帧上扩展，则可以提高性能。
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公开(公告)号：US5974041A
公开(公告)日：1999-10-26
申请号：US579169
申请日：1995-12-27
IPC分类号： H03F99/00 , H03F1/02 , H03F1/32 , H03F3/60 , H03F3/68 , H03F3/72 , H03G3/02 , H03G3/30 , H04B1/04 , H04B7/26 , H04J13/00
CPC分类号： H03F3/211 , H03F1/0277 , H03F1/0288 , H03F3/602 , H03F3/72 , H03G3/3042 , H04B1/0483 , H03F2200/294 , H03F2203/7236 , H04B2001/0408
摘要： An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network is provided for coupling the amplified signal from the selected at least one amplifier stage. The appropriate amplifier stage is selected by a control circuit in response to a desired power value of the amplified signal. By selectively activating only the amplifier stage(s) that are necessary to provide the desired level of output power, increased DC efficiency can be accomplished in applications that require an amplifier which operates linearly over a wide dynamic range.
摘要翻译： 一种用于响应于输入信号提供放大信号的放大器电路。 放大器电路包括用于将输入信号施加到所选择的多个放大器级中的至少一个的输入网络。 提供输出网络用于耦合来自所选择的至少一个放大器级的放大信号。 响应于放大信号的期望功率值，控制电路选择合适的放大器级。 通过选择性地仅激活提供期望电平的输出功率所需的放大器级，可以在需要在宽动态范围内线性运行的放大器的应用中实现增加的DC效率。
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116.发明授权Method and apparatus for integration of a wireless communication system with a cable television system 失效用于将无线通信系统与有线电视系统集成的方法和装置
公开(公告)号：US5839052A
公开(公告)日：1998-11-17
申请号：US600103
申请日：1996-02-08
IPC分类号： H04N7/173
CPC分类号： H04L12/2801 , H04B3/54 , H04W52/325 , H04B2203/5441 , H04B2203/5487 , H04N7/10 , H04W36/18 , H04W52/146
摘要： The present invention is a method and apparatus for integrating a personal communication system with a cable television plant. A set of radio antenna devices (RAD) are connected to the cable plant. The RADs provide frequency conversion and power control of signal received from the cable plant for wireless transmission to the remote units. The RADs also provide power control and frequency conversion of wireless signals received from the remote units for transmission by the RADs onto the cable plant. In addition to the functions of standard base stations and centralized controller, the CATV base station must also compensate for gain variations in the cable plant. The downstream power control is regulated by a RAD reference signal which can be hidden within the CDMA signal for maximum efficiency. The upstream power control is regulated by an upstream gain reference signal which is individually transmitted by each RAD on the upstream link.
摘要翻译： 本发明是用于将个人通信系统与有线电视设备集成的方法和装置。 一组无线电天线设备（RAD）连接到电缆设备。 RAD提供从电缆设备接收的信号的频率转换和功率控制，用于无线传输到远程单元。 RAD还提供从远程单元接收的无线信号的功率控制和频率转换，以将RAD传输到电缆设备上。 除了标准基站和集中控制器的功能外，CATV基站还必须补偿电缆厂的增益变化。 下行功率控制由可以隐藏在CDMA信号内的RAD参考信号来调节，以获得最大的效率。 上游功率控制由上游链路上的每个RAD单独发送的上游增益参考信号来调节。
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117.发明授权Reverse link, closed loop power control in a code division multiple access system 失效反向链路，闭环功率控制在码分多址系统中
公开(公告)号：US5812938A
公开(公告)日：1998-09-22
申请号：US719296
申请日：1996-09-19
IPC分类号： H04B7/005 , H04B7/26 , H04W24/00 , H04W28/22 , H04W52/00 , H04W52/08 , H04W52/12 , H04W52/26 , H04W74/00 , H04B7/00
摘要： The process of the present invention enables a mobile radiotelephone to operate at a 100% duty cycle while providing closed loop power control. The base station measures the signal to noise ratio of the signal from the mobile and compares that SNR with the SNR threshold values the base station has for each data rate the mobile is capable of transmitting. The base station then generates power control commands to instruct the mobile to change its power depending on the outcome of the comparisons.
摘要翻译： 本发明的过程使移动无线电话机能够以100％的占空比工作，同时提供闭环功率控制。 基站测量来自移动台的信号的信噪比，并将该SNR与移动台能够发送的每个数据速率的基站具有的SNR阈值进行比较。 基站然后产生功率控制命令以指示移动台根据比较的结果来改变其功率。
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118.发明授权
公开(公告)号：US5576662A
公开(公告)日：1996-11-19
申请号：US547340
申请日：1995-10-24
摘要： A high dynamic range linear automatic gain control (AGC) circuit that has independent means for temperature compensation. The temperature compensation circuit of this invention can be used in a closed-loop AGC circuit such as is required in a transceiver for compensating the gains of receiver and transmitter amplifiers to ensure that both track closely over ranges of temperature, frequency and load impedance. The temperature compensation signal is coupled to one of the two gates in a field effect transistor (FET) amplifier to maintain a constant gain function over ranges of temperature, frequency and load impedance. Thermal compensation for the transmitter amplifier is derived from the thermal compensation signal for the receiver amplifier.
摘要翻译： 高动态范围线性自动增益控制（AGC）电路，具有独立的温度补偿装置。 本发明的温度补偿电路可以用在诸如收发器中所需的闭环AGC电路中，用于补偿接收机和发射机放大器的增益，以确保两个轨道紧密接近温度，频率和负载阻抗的范围。 温度补偿信号耦合到场效应晶体管（FET）放大器中的两个栅极中的一个，以在温度，频率和负载阻抗范围内保持恒定的增益函数。 发射机放大器的热补偿来自接收放大器的热补偿信号。
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公开(公告)号：US5530928A
公开(公告)日：1996-06-25
申请号：US446128
申请日：1995-05-22
CPC分类号： H03D7/1433 , H03D7/1408 , H03D7/1425 , H03D7/1458 , H03C1/542 , H03D2200/0043
摘要： A balanced mixer is used as a switch. In digital mode, the balanced mixer receives a digital mode analog waveform and a local oscillator (L.O.). The balanced mixer mixes the waveform and the L.O. to provide a resultant output signal. In analog mode, the L.O. is modulated to contain the communication information. No analog signal is present on the port of the mixer which received the digital mode analog waveform in digital mode. The desired output of the mixer is the modulated L.O. In order to pass the L.O. through the mixer, a DC bias is applied to one of the waveform terminals of the mixer to unbalance it. A diode attenuator is added to the output of the mixer to provide scaling of the analog mode output.
摘要翻译： 平衡混频器用作开关。 在数字模式下，平衡混频器接收数字模拟模拟波形和本地振荡器（L.O.）。 平衡混合器混合波形和L.O. 以提供结果输出信号。 在模拟模式下，L.O. 被调制以包含通信信息。 在数字模式下接收数字模拟模拟波形的混频器端口上没有模拟信号。 混合器的期望输出是调制的L.O. 为了通过L.O. 通过混频器，将DC偏压施加到混频器的一个波形端子以使其不平衡。 二极管衰减器被添加到混频器的输出端以提供模拟模式输出的缩放。
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公开(公告)号：US5107225A
公开(公告)日：1992-04-21
申请号：US620092
申请日：1990-11-30
CPC分类号： H03G3/3042 , H03G3/3078
摘要： A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit is coupled to the amplifier means for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.
摘要翻译： 具有高动态范围能力的闭环自动增益控制（AGC）电路具有放大器电路，用于接收容易受到信号功率变化的输入信号和控制信号的影响。 放大器电路响应于控制信号，以与控制信号相对应的增益电平放大输入信号，从而提供相应的输出信号。 测量电路耦合到放大器装置，用于测量放大的输入信号的对数信号功率并提供相应的线性测量信号。 包括用于接收测量信号的积分电路和对应于输出信号的期望信号功率的参考信号。 积分电路相对于测量信号和参考信号之间的差异而积分，并且产生对应于积分结果的控制信号。
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