Communication device capable of estimating signal quality without
synchronization pattern
    1.
    发明授权
    Communication device capable of estimating signal quality without synchronization pattern 失效
    无需同步模式即可估计信号质量的通信设备

    公开(公告)号:US5715240A

    公开(公告)日:1998-02-03

    申请号:US642548

    申请日:1996-05-03

    CPC分类号: H04L7/0004 H04L7/10

    摘要: A method determines the signal usability of an adjacent channel in a multi-cell communication system without the aid of synchronization symbols. In general, a three step search is used to arrive at the adjacent channel signal quality. The first step is a coarse timing phase search. This is accomplished through a signal quality estimates (606). The second step arrives at the optimum time phase by first interpolating (608) the received signal around the time phase selected in the first step to generate additional samples. After the interpolation (608), signal quality estimates are calculated (610) for the time phases immediately surrounding the time phase found in the first step. The optimum time phase corresponds to the maximum of these quality estimates. Finally, in the third step, the signal quality estimate is calculated for the optimum time phase. This provides the adjacent channel signal quality estimate desired.

    摘要翻译: 一种方法确定多小区通信系统中相邻信道的信号可用性,而不需要同步符号。 通常,使用三步搜索来获得相邻信道信号质量。 第一步是粗略的时序相位搜索。 这是通过信号质量估计来实现的(606)。 第二步通过首先内插(608)在第一步骤中选择的时间相位周围的接收信号以产生附加样本,到达最佳时间阶段。 在内插(608)之后,针对在第一步骤中发现的时间段周围的时间阶段计算信号质量估计(610)。 最佳时间段对应于这些质量估计的最大值。 最后,在第三步中,针对最佳时间阶段计算信号质量估计。 这提供了期望的相邻信道信号质量估计。

    METHODS AND SYSTEMS FOR PROVIDING AN APPLIANCE HYBRID MODE
    3.
    发明申请
    METHODS AND SYSTEMS FOR PROVIDING AN APPLIANCE HYBRID MODE 有权
    提供装置混合模式的方法和系统

    公开(公告)号:US20120319491A1

    公开(公告)日:2012-12-20

    申请号:US13351880

    申请日:2012-01-17

    IPC分类号: H02J7/00 H02J3/00

    摘要: A hybrid energy management method and system which provides a main power supply and a secondary power supply. The main power supply is electrically coupled to the utility power grid, while the secondary power supply is electrically isolatable from the utility power grid. A switch is provided to selectably power the appliance through the main alternating current power supply when the utility is not in a reduced demand operating mode and to selectably power the appliance through the secondary alternating current power supply when the utility is in a reduced demand mode.

    摘要翻译: 一种提供主电源和二次电源的混合能量管理方法和系统。 主电源电连接到公用电网,而二次电源与公用电网电隔离。 当电力公司不处于减少的需求操作模式时,提供开关以通过主交流电源可选择地为电器供电,并且当电力公司处于减少需求模式时,通过次级交流电源可选择地为电器供电。

    Communication unit energy conservation apparatus and method
    4.
    发明授权
    Communication unit energy conservation apparatus and method 有权
    通信单元节能设备及方法

    公开(公告)号:US06990362B2

    公开(公告)日:2006-01-24

    申请号:US10737356

    申请日:2003-12-16

    IPC分类号: H04Q7/32

    摘要: A communication unit (10) can have at least a first receiver (11) and a second receiver (12). The latter typically consumes more power than the former during ordinary operation. Pursuant to one embodiment a communication unit can use the lower-power receiver to detect energy on a monitored channel while the second receiver is retained in a reduced power mode of operation. Upon detecting an absence of channel activity the second receiver can be restored to normal operability to effect such activities as are then presently required.

    摘要翻译: 通信单元(10)可以具有至少第一接收机(11)和第二接收机(12)。 后者通常在正常操作中消耗比前者更多的功率。 根据一个实施例,通信单元可以使用较低功率的接收机来检测所监视的信道上的能量,而第二接收机被保持在降低功率的操作模式中。 在检测到不存在信道活动时,可以将第二接收机恢复到正常的可操作性,以实现当前所需的活动。

    Burst mode receiver control
    5.
    发明授权
    Burst mode receiver control 失效
    突发模式接收机控制

    公开(公告)号:US5325405A

    公开(公告)日:1994-06-28

    申请号:US750373

    申请日:1991-08-27

    CPC分类号: H04B1/44 H04M1/72505

    摘要: A transceiver (100) is provided for transmitting during the transmission bursts (12) of a frame and receiving during the receiving time-slot windows (14). The transceiver (100) includes a receiver (320) for receiving a repeating radio frequency data (16) signal at any time within the receiving time-slot window (14) and for demodulating the repeating radio frequency data signal down to a baseband data signal. A data detector and clock recovery device (330) recovers the valid data (CHMP) from the baseband data signal. For controlling the receiver (320) and data detector and clock recovery device (330), a control circuit (400) modifies the receiving time-slot windows (14) to only receive and detect when valid data is expected (52).

    摘要翻译: 收发器(100)被提供用于在帧的传输脉冲串(12)期间进行传输并在接收时隙窗口(14)期间接收。 收发器(100)包括用于在接收时隙窗口(14)内的任何时间接收重复的射频数据(16)信号的接收机(320),并且将重复射频数据信号解调为基带数据信号 。 数据检测器和时钟恢复装置(330)从基带数据信号中恢复有效数据(CHMP)。 为了控制接收机(320)和数据检测器和时钟恢复装置(330),控制电路(400)修改接收时隙窗口(14),以仅在预期有效数据时接收和检测(52)。

    Communication system and apparatus
    6.
    发明授权
    Communication system and apparatus 失效
    通信系统和设备

    公开(公告)号:US5301353A

    公开(公告)日:1994-04-05

    申请号:US99269

    申请日:1993-07-29

    CPC分类号: H04W16/00 H04M1/737

    摘要: A communication device (16) comprises first and second transceivers and apparatus for determining when the communication device (16) is in an on-site area (11) and when the communication device (16) is in an off-site area. The first transceiver transmits and receives signals on a first communication medium (17), when the communication device (16) is in a first area (11); whereas, second transceiver transmits and receives signals on a second communication medium (28), when the communication device (16) is in a second area.

    摘要翻译: 通信设备(16)包括用于确定通信设备(16)什么时候在现场区域(11)中以及当通信设备(16)处于非现场区域时的第一和第二收发器和设备。 当通信设备(16)在第一区域(11)中时,第一收发器在第一通信介质(17)上发送和接收信号; 而当通信设备(16)处于第二区域时,第二收发器在第二通信介质(28)上发送和接收信号。

    Transceiver having a divide-down transmit offset scheme
    7.
    发明授权
    Transceiver having a divide-down transmit offset scheme 失效
    收发器具有分频传输偏移方案

    公开(公告)号:US5276915A

    公开(公告)日:1994-01-04

    申请号:US787279

    申请日:1991-11-04

    IPC分类号: H04B1/40 H04B15/04

    摘要: A radio communication device, having a receive mode and a transmit mode, includes a receiver portion, a transmitter portion, and multiple oscillators for providing reference waveforms for the radio communication device. During the receive mode, the receiver portion receives signals having a selected frequency, converts received signals to at least a first intermediate frequency (IF), and a transmitter oscillator produces a first waveform having a frequency equal to a multiple of the first intermediate frequency during the receive mode. During the transmit mode, the transmitter portion requires a reference waveform having an offset frequency equivalent to the first IF frequency to produce a radio frequency signal. Thus, the radio communication device also comprises a divider coupled to the transmitter oscillator for dividing the frequency of the first waveform to the required offset frequency in the transmit mode.

    摘要翻译: 具有接收模式和发送模式的无线电通信装置包括用于为无线电通信装置提供参考波形的接收机部分,发射机部分和多个振荡器。 在接收模式期间,接收机部分接收具有选定频率的信号,将接收到的信号转换成至少第一中频(IF),发射机振荡器产生频率等于第一中频倍数的第一波形 接收模式。 在发射模式期间,发射机部分需要具有等于第一IF频率的偏移频率的参考波形,以产生射频信号。 因此,无线电通信设备还包括耦合到发射机振荡器的分频器,用于在发送模式中将第一波形的频率划分为所需的偏移频率。

    Energy saving protocol for a communication system
    8.
    发明授权
    Energy saving protocol for a communication system 失效
    一种通信系统的节能协议

    公开(公告)号:US5128938A

    公开(公告)日:1992-07-07

    申请号:US666499

    申请日:1991-03-06

    申请人: Jaime A. Borras

    发明人: Jaime A. Borras

    摘要: A centralized communication system controller (102) measures and stores a historical record of each subscriber unit's communication activity. By examining this historical record, the controller predicts the subscriber unit's communication activity over a future time interval. A code based upon this prediction is transmitted to the subscriber unit (110), which causes the subscriber unit to enter an energy saving mode and deactivate (208) non-essential circuits for a time period represented by the code. In this way, the duration of the "sleep" interval may be optimally varied based upon the subscriber unit's communication history. In another aspect of the invention, unexpected messages for a subscriber unit in the energy saving mode are stored (114) electronically until the conclusion of the "sleep" interval. This message storing function enhances system efficiency when the subscriber unit's communication history does not correlate with actual commuication traffic.

    摘要翻译: 集中式通信系统控制器(102)测量和存储每个用户单元的通信活动的历史记录。 通过检查这个历史记录,控制器在未来的时间间隔内预测用户单元的通信活动。 基于该预测的代码被发送到用户单元(110),其使得订户单元进入节能模式并且在由代码表示的时间段内去激活(208)非必需电路。 以这种方式,可以基于用户单元的通信历史来最佳地改变“睡眠”间隔的持续时间。 在本发明的另一方面,用于节能模式的用户单元的意外消息以电子方式存储(114)直到“睡眠”间隔的结束为止。 当用户单元的通信历史与实际通信流量不相关时,该消息存储功能提高了系统效率。

    Battery saving system for a frequency synthesizer
    9.
    发明授权
    Battery saving system for a frequency synthesizer 失效
    频率合成器节电系统

    公开(公告)号:US4631496A

    公开(公告)日:1986-12-23

    申请号:US808905

    申请日:1985-12-13

    摘要: A frequency synthesized transceiver capable of tuning to a plurality of communication channels is disclosed. The transceiver includes a receiver and a transmitter section which are coupled to the synthesizer which generates the appropriate injection signals to achieve tuning. A battery saving circuit generates a battery saving signal having a predetermined duty cycle and period and is responsive to the phase detector in the synthesizer to disrupt power to the synthesizer while maintaining precise tuning. The battery saver circuit is also responsive to the transceiver. In a normal receive operation, a battery saving circuit synchronizes its battery saving signal with the hold condition of the phase detector to disrupt power to selected modules in the synthesizer without altering the injection frequency of the receiver. In a standby mode, power is disrupted to all modules in the receiver, the selected modules in the phase locked loop and the voltage controlled oscillator. During a transmit mode all battery saving is terminated.

    摘要翻译: 公开了能够调谐到多个通信信道的频率合成收发器。 收发器包括接收器和发射器部分,其耦合到合成器,其产生适当的注入信号以实现调谐。 电池节省电路产生具有预定占空比和周期的电池节省信号,并且响应于合成器中的相位检测器来中断合成器的电源,同时保持精确的调谐。 电池保护电路也对收发器做出响应。 在正常接收操作中,电池节省电路使其电池节省信号与相位检测器的保持状态同步,以将合成器中的选定模块的功率中断,而不改变接收机的注入频率。 在待机模式下,接收机中的所有模块,锁相环中的选定模块和压控振荡器的电源中断。 在发送模式期间,所有电池节电终止。

    Digital and analog phase detector for a frequency synthesizer
    10.
    发明授权
    Digital and analog phase detector for a frequency synthesizer 失效
    用于频率合成器的数字和模拟相位检测器

    公开(公告)号:US4490688A

    公开(公告)日:1984-12-25

    申请号:US251570

    申请日:1981-04-06

    摘要: A sample and hold phase detector for a phase locked loop includes a digital detector for detecting the frequency and phase difference between the reference signal and the voltage controlled oscillator (VCO) signal. In a first mode of operation, the digital detector generates a first signal relating the difference in frequency and in a second mode of operation generates a second signal relating the difference in phase. A capacitor stores the first or second signal depending on the operational mode of the digital detector. The capacitor is selectively discharged in response to a discharge signal produced by the digital detector when either the VCO frequency is higher than the reference frequency or following each detection of a phase difference. A first amplifier is used to bypass a portion of the loop filter to effect rapid changes in VCO frequency in the first mode while a second amplifier couples the control voltage to the VCO via the loop filter to maintain proper VCO frequency in the second mode.

    摘要翻译: 用于锁相环的采样和保持相位检测器包括用于检测参考信号和压控振荡器(VCO)信号之间的频率和相位差的数字检测器。 在第一操作模式中,数字检测器产生与频率差有关的第一信号,而在第二操作模式中产生与相位差有关的第二信号。 电容器根据数字检测器的工作模式存储第一或第二信号。 当VCO频率高于参考频率或每次检测相位差之后,电容器响应于由数字检测器产生的放电信号而被选择性地放电。 第一放大器用于绕过环路滤波器的一部分以在第一模式中实现VCO频率的快速变化,而第二放大器经由环路滤波器将控制电压耦合到VCO以在第二模式中维持适当的VCO频率。