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    Method and apparatus of frequency generation for use with digital cordless telephones
    1.
    发明授权
    Method and apparatus of frequency generation for use with digital cordless telephones 失效
    用于数字无绳电话的频率发生方法和装置

    公开(公告)号：US5722040A

    公开(公告)日：1998-02-24

    申请号：US13625

    申请日：1993-02-04

    申请人： Bjorn E. Bjerede ,  Joseph T. Lipowski ,  James E. Petranovich ,  F. Matthew Rhodes

    发明人： Bjorn E. Bjerede ,  Joseph T. Lipowski ,  James E. Petranovich ,  F. Matthew Rhodes

    IPC分类号： H03J1/00 ,  H04B1/40 ,  H04B7/26

    CPC分类号： H04B1/405 ,  H03J1/0008

    摘要： Methods and apparatus for digital cordless telephone systems are preferably implemented in an integrated circuit chip set having one or more chips, adapted to receive a voice signal, for converting the voice signal into a digital signal of a desired form, for converting the digital signal into an analog signal and for modifying the frequency of the analog signal, for up converting during transmission the frequency of the analog signal from an intermediate frequency to a desired radio frequency and for down converting during reception from a selected radio frequency to the intermediate frequency and for amplifying the radio frequency signal during transmission and for switching the antenna between the transmit and receive paths. It is preferred for the chip set to include a base chip, an intermediate frequency chip, a radio frequency chip and an amplifier chip. It is preferred to also provide a synthesizer integrated circuit chip for generating carrier select signals to be used by the radio frequency chip in selecting desired carrier frequencies. The invention also includes a frequency translation scheme to be utilized in conjunction with the various chips. Utilization of this scheme serves to reduce spurious noise as well as to suppress transmit signals during receive operations. The invention also includes various sensors for adjusting the level of the signal to be transmitted and for adjusting the level of the signal received at the antenna.

    摘要翻译： 用于数字无绳电话系统的方法和装置优选地在具有一个或多个芯片的集成电路芯片组中实现，该芯片组适于接收语音信号，用于将语音信号转换成所需形式的数字信号，以将数字信号转换成 模拟信号，用于修改模拟信号的频率，用于在将模拟信号的频率从中频到期望的射频传输期间进行上转换，并且用于在从选定的射频到中频的接收期间进行下变频， 在传输期间放大射频信号，并在发射和接收路径之间切换天线。 芯片组优选包括基片，中频芯片，射频芯片和放大器芯片。 优选地还提供一种用于产生载波选择信号的合成器集成电路芯片，以在射频芯片选择期望的载波频率时使用。 本发明还包括与各种芯片结合使用的频率转换方案。 该方案的利用有助于减少杂散噪声以及在接收操作期间抑制发射信号。 本发明还包括用于调整要发送的信号的电平并用于调整在天线处接收的信号的电平的各种传感器。

    Universal radio architecture for low-tier personal communication system
    2.
    发明授权
    Universal radio architecture for low-tier personal communication system 失效
    用于低层个人通信系统的通用无线电架构

    公开(公告)号：US5648985A

    公开(公告)日：1997-07-15

    申请号：US348359

    申请日：1994-11-30

    申请人： Bjorn E. Bjerede ,  Joseph T. Lipowski ,  Benny Madsen ,  Sheldon L. Gilbert ,  James E. Petranovich

    发明人： Bjorn E. Bjerede ,  Joseph T. Lipowski ,  Benny Madsen ,  Sheldon L. Gilbert ,  James E. Petranovich

    IPC分类号： H04L27/10 ,  H04B1/26 ,  H04B1/40 ,  H04B1/56 ,  H04J1/00 ,  H04L5/14 ,  H04L27/00 ,  H04L27/18 ,  H04B1/38

    CPC分类号： H04L27/0008 ,  H04B1/403 ,  H04L5/143 ,  H04L5/1492 ,  H04B1/56

    摘要： An integrated circuit chip set is provided for use in a radio communication system in which a modulated digital input signal is processed for transmission and a modulated signal received from an antenna is processed to provide an output signal, wherein the modulation of the signals is either QPSK or FSK and the signal transmission and reception is by either TDD or FDD. The chip set includes an IF integrated circuit chip for processing a digital input signal to convert the digital input signal into an analog input signal and to provide the input signal at an intermediate frequency and for processing a received signal at the intermediate frequency to down convert the frequency thereof and to provide an output signal from the down-converted received signal; and an RF integrated circuit chip for processing the input signal provided by the IF chip at the intermediate frequency to up convert the frequency thereof to a transmission frequency and for processing a received signal provided at the reception frequency to down convert the frequency thereof to the intermediate frequency. The IF chip includes switches and terminals for enabling the IF chip to be connected for processing by the IF chip of QPSK-modulated signals or to be connected for processing by the IF chip of FSK-modulated signals; and the RF chip includes terminals for enabling the RF chip to be connected for processing by the RF chip of TDD transmitted and received signals or to be connected for processing by the RF chip of FDD transmitted and received signals.

    摘要翻译： 提供一种用于无线电通信系统的集成电路芯片组，其中调制的数字输入信号被处理用于传输，并且处理从天线接收的调制信号以提供输出信号，其中信号的调制是QPSK 或FSK，并且信号发送和接收是通过TDD或FDD。 芯片组包括用于处理数字输入信号以将数字输入信号转换成模拟输入信号并且以中频提供输入信号并用于处理中频处的接收信号的IF集成电路芯片， 并提供来自下变频接收信号的输出信号; 以及用于处理由IF芯片在中频提供的输入信号的RF集成电路芯片，以将其频率向上转换为传输频率，并处理以接收频率提供的接收信号，以将其频率下变频到中间 频率。 IF芯片包括用于使IF芯片连接以由IF芯片进行QPSK调制信号处理的开关和端子，或者被IFK芯片进行FSK调制信号的处理连接; 并且RF芯片包括终端，用于使RF芯片能够被连接用于RF芯片的TDD发送和接收信号的处理，或者被连接以供FDD发送和接收信号的RF芯片处理。

    Receiver with filters offset correction
    3.
    发明授权
    Receiver with filters offset correction 失效
    接收机带滤波器偏移校正

    公开(公告)号：US5757864A

    公开(公告)日：1998-05-26

    申请号：US516197

    申请日：1995-08-17

    申请人： James E. Petranovich ,  Joseph T. Lipowski

    发明人： James E. Petranovich ,  Joseph T. Lipowski

    IPC分类号： H04L27/14 ,  H03J3/08 ,  H03J7/04 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04L27/06

    CPC分类号： H03J3/08 ,  H03J7/04 ,  H04W52/0283 ,  Y02B60/50

    摘要： The present invention relates to circuitry for a receiver having a low cost filter using automatic alignment of the center frequency of signals input to the filter to suppress noise and out-of-band signals from the filter output over a narrow bandwidth. An RF input signal to the receiver is downconverted to an IF frequency using a VCO, and the IF signal is provided to the low cost filter. The output of the filter is input to a frequency correction circuit and a distortion detection circuit. The distortion detection circuit provides an error signal including positive frequency shift errors determined from digital ones identified from the filter output signal, and negative frequency shift error signals determined from digital zeros in the filter output signal. The distortion detection circuit output is then provided through an infinite impulse response filter which integrates the distortion detection output to provide a voltage control signal to a voltage control input of the VCO and the frequency correction circuit. The VCO then automatically centers the frequency of the signal input to the low cost filter to suppress noise and out-of-band signals, and the frequency correction circuit removes error correction frequency shift provided by the VCO after downconversion. For battery powered devices, the infinite impulse response filter can maintain the state of the voltage control signal provided to the VCO upon receipt of a sleep mode signal after the sleep mode signal is disabled.

    摘要翻译： 本发明涉及一种具有低成本滤波器的接收机电路，该低成本滤波器使用输入到滤波器的信号的中心频率的自动对准来在窄带宽上抑制来自滤波器输出的噪声和带外信号。 使用VCO将RF接收器的RF输入信号下变频到IF频率，并将IF信号提供给低成本滤波器。 滤波器的输出被输入到频率校正电路和失真检测电路。 失真检测电路提供包括从滤波器输出信号识别的数字确定的正频移误差的误差信号，以及滤波器输出信号中从数字零点确定的负频移误差信号。 然后通过无限脉冲响应滤波器提供失真检测电路输出，该无限脉冲响应滤波器对失真检测输出进行积分，以向VCO的电压控制输入端和频率校正电路提供电压控制信号。 VCO然后自动将信号输入的频率中心到低成本滤波器以抑制噪声和带外信号，并且频率校正电路去除下变频后由VCO提供的纠错频移。 对于电池供电的设备，无限脉冲响应滤波器可以在睡眠模式信号被禁用后接收到休眠模式信号时保持提供给VCO的电压控制信号的状态。

    Programmable digital modulator and methods of modulating digital data
    4.
    发明授权
    Programmable digital modulator and methods of modulating digital data 失效
    可编程数字调制器和调制数字数据的方法

    公开(公告)号：US5420887A

    公开(公告)日：1995-05-30

    申请号：US858397

    申请日：1992-03-26

    申请人： F. Matthew Rhodes ,  James E. Petranovich

    发明人： F. Matthew Rhodes ,  James E. Petranovich

    IPC分类号： H04L25/03 ,  H04L27/00 ,  H03C3/00

    CPC分类号： H04L27/0008 ,  H04L25/03859

    摘要： A programmable digital modulator and methods of modulating digital data for transmission by a communication system according to operating parameters selected for various applications are provided. A two-chip system is utilized by a preferred embodiment of the invention. One chip comprises a PROM for storing impulse response data which would result from filtering the data to be transmitted. The second chip comprises a data interface for accepting input data, an address generator for generating an address of the PROM where the impulse response data is stored which corresponds to the data input to the chip and for causing the PROM to output the impulse response data stored at the address generated, and a data modulator for modulating a carrier signal with the impulse response data provided by the PROM. To account for intersymbol interference which occurs in some types of digital communications, an accumulator is further provided by the second chip for summing impulse response data associated with more than one input where the impulse response data overlap in time. An interpolator is also provided by the second chip to generate additional data samples to be used to modulate the carrier signal enabling a greater output sample rate. A data scrambler is also provided to scramble either binary data or data symbols according to the particular mode of communication selected.

    摘要翻译： 提供了一种可编程数字调制器和调制数字数据以便根据为各种应用选择的操作参数由通信系统传输的方法。 本发明的优选实施例利用双芯片系统。 一个芯片包括一个PROM，用于存储由滤波要发送的数据产生的脉冲响应数据。 第二芯片包括用于接收输入数据的数据接口，地址发生器，用于产生存储脉冲响应数据的PROM的地址，该地址对应于输入到芯片的数据，并使PROM输出存储的脉冲响应数据 以及用PROM提供的脉冲响应数据调制载波信号的数据调制器。 为了解决在某些类型的数字通信中发生的符号间干扰，由第二芯片进一步提供一个累加器，用于对与脉冲响应数据在时间上重叠的多于一个输入相关联的脉冲响应数据求和。 内插器也由第二芯片提供以产生附加的数据采样，以用于调制载波信号，从而能够获得更大的输出采样率。 还提供数据扰频器以根据所选择的特定通信模式来对二进制数据或数据符号进行加扰。

    Sample interpolator and method of generating additional samples of a sampled waveform using a programmable sample divider
    5.
    发明授权
    Sample interpolator and method of generating additional samples of a sampled waveform using a programmable sample divider 失效
    样本内插器和使用可编程样本分割器生成采样波形的附加样本的方法

    公开(公告)号：US5937010A

    公开(公告)日：1999-08-10

    申请号：US918941

    申请日：1997-08-25

    申请人： James E. Petranovich ,  F. Matthew Rhodes

    发明人： James E. Petranovich ,  F. Matthew Rhodes

    IPC分类号： H04L25/03 ,  H04L27/00 ,  H04L27/04

    CPC分类号： H04L27/0008 ,  H04L25/03859

    摘要： A programmable digital modulator and methods of modulating digital data for transmission by a communication system according to operating parameters selected for various applications are provided. A two-chip system is utilized by a preferred embodiment of the invention. One chip comprises a PROM for storing impulse response data which would result from filtering the data to be transmitted. The second chip comprises a data interface for accepting input data, an address generator for generating an address of the PROM where the impulse response data is stored which corresponds to the data input to the chip and for causing the PROM to output the impulse response data stored at the address generated, and a data modulator for modulating a carrier signal with the impulse response data provided by the PROM. To account for intersymbol interference which occurs in some types of digital communications, an accumulator is further provided by the second chip for summing impulse response data associated with more than one input where the impulse response data overlap in time. An interpolator is also provided by the second chip to generate additional data samples to be used to modulate the carrier signal enabling a greater output sample rate. A data scrambler is also provided to scramble either binary data or data symbols according to the particular mode of communication selected.

    摘要翻译： 提供了一种可编程数字调制器和调制数字数据以便根据为各种应用选择的操作参数由通信系统传输的方法。 本发明的优选实施例利用双芯片系统。 一个芯片包括一个PROM，用于存储由滤波要发送的数据产生的脉冲响应数据。 第二芯片包括用于接收输入数据的数据接口，地址发生器，用于产生存储脉冲响应数据的PROM的地址，该地址对应于输入到芯片的数据，并使PROM输出存储的脉冲响应数据 以及用PROM提供的脉冲响应数据调制载波信号的数据调制器。 为了解决在某些类型的数字通信中发生的符号间干扰，由第二芯片进一步提供一个累加器，用于对与脉冲响应数据在时间上重叠的多于一个输入相关联的脉冲响应数据求和。 内插器也由第二芯片提供以产生附加的数据采样，以用于调制载波信号，从而能够获得更大的输出采样率。 还提供数据扰频器以根据所选择的特定通信模式来对二进制数据或数据符号进行加扰。

    Programmable digital modulator and methods of modulating digital data
    6.
    发明授权
    Programmable digital modulator and methods of modulating digital data 失效
    可编程数字调制器和调制数字数据的方法

    公开(公告)号：US5600678A

    公开(公告)日：1997-02-04

    申请号：US330577

    申请日：1994-10-27

    申请人： James E. Petranovich ,  F. Matthew Rhodes

    发明人： James E. Petranovich ,  F. Matthew Rhodes

    IPC分类号： H04L25/03 ,  H04L27/00 ,  H04L27/36 ,  H04L27/20

    CPC分类号： H04L27/0008 ,  H04L25/03859

    摘要： A programmable digital modulator and methods of modulating digital data for transmission by a communication system according to operating parameters selected for various applications are provided. A two-chip system is utilized by a preferred embodiment of the invention. One chip comprises a PROM for storing impulse response data which would result from filtering the data to be transmitted. The second chip comprises a data interface for accepting input data, an address generator for generating an address of the PROM where the impulse response data is stored which corresponds to the data input to the chip and for causing the PROM to output the impulse response data stored at the address generated, and a data modulator for modulating a carrier signal with the impulse response data provided by the PROM. To account for intersymbol interference which occurs in some types of digital communications, an accumulator is further provided by the second chip for summing impulse response data associated with more than one input where the impulse response data overlap in time. An interpolator is also provided by the second chip to generate additional data samples to be used to modulate the carrier signal enabling a greater output sample rate. A data scrambler is also provided to scramble either binary data or data symbols according to the particular mode of communication selected.

    摘要翻译： 提供了一种可编程数字调制器和调制数字数据以便根据为各种应用选择的操作参数由通信系统传输的方法。 本发明的优选实施例利用双芯片系统。 一个芯片包括一个PROM，用于存储由滤波要发送的数据产生的脉冲响应数据。 第二芯片包括用于接收输入数据的数据接口，地址发生器，用于产生存储脉冲响应数据的PROM的地址，该地址对应于输入到芯片的数据，并使PROM输出存储的脉冲响应数据 以及用PROM提供的脉冲响应数据调制载波信号的数据调制器。 为了解决在某些类型的数字通信中发生的符号间干扰，由第二芯片进一步提供一个累加器，用于对与脉冲响应数据在时间上重叠的多于一个输入相关联的脉冲响应数据求和。 内插器也由第二芯片提供以产生附加的数据采样，以用于调制载波信号，从而能够获得更大的输出采样率。 还提供数据扰频器以根据所选择的特定通信模式来对二进制数据或数据符号进行加扰。

    Method and apparatus for frequency reuse in cellular communication systems
    7.
    发明授权
    Method and apparatus for frequency reuse in cellular communication systems 有权
    蜂窝通信系统中频率重用的方法和装置

    公开(公告)号：US06188903B1

    公开(公告)日：2001-02-13

    申请号：US09422032

    申请日：1999-10-20

    申请人： Steven H. Gardner ,  Sheldon L. Gilbert ,  Carl Thomas Hardin ,  James E. Petranovich

    发明人： Steven H. Gardner ,  Sheldon L. Gilbert ,  Carl Thomas Hardin ,  James E. Petranovich

    IPC分类号： H04Q720

    CPC分类号： H04W16/12 ,  H04B7/2615 ,  H04B7/265 ,  H04B7/2693 ,  H04W4/06 ,  H04W16/02 ,  H04W16/14 ,  H04W28/16 ,  H04W56/00 ,  H04W68/00 ,  H04W72/0446 ,  H04W72/082 ,  H04W74/04 ,  H04W84/042

    摘要： A time sharing method and apparatus for frequency reuse in cellular communication systems. Frequency reuse is enhanced by synchronizing cell transmit/receive base stations in a cellular system to a common time base, and then sharing the available frequencies via allocated time slots. Cells using the same frequency that may interfere with each other are activated only during selected time intervals while same-frequency cells nearby are deactivated. The deactivated cells are then in turn activated while previously activated same-frequency cells nearby are deactivated. The frequency time slots may be of equal length, or longer time slots may be allocated to cells having higher usage rates, as determined in any of a number of ways. The time slots may be mutually exclusive, or may overlap. The time sharing technique of the present invention allows design of cell systems with many reuse patterns. Several particular cell reuse patterns are disclosed that provide good operational characteristics and low co-channel interference. The invention allows the use of a small number of cellular frequencies in a conventional cellular system without significant alteration of the existing system, and is particularly useful in two-way cellular paging systems. Improved reverse link data throughput is achieved via reuse of the reverse frequency channels.

    摘要翻译： 用于蜂窝通信系统中频率重用的时间分配方法和装置。 通过将蜂窝系统中的小区发射/接收基站同步到公共时基，然后通过分配的时隙共享可用频率来增强频率重用。 使用可能相互干扰的相同频率的单元仅在选定的时间间隔内被激活，同时附近的相同频率的单元被去激活。 然后，激活的激活单元然后被激活，而附近的先前激活的相同频率的单元被去激活。 频率时隙可以具有相同的长度，或者可以以多种方式中的任一种来确定具有较高使用率的小区的较长时隙。 时隙可能是相互排斥的，或者可能重叠。 本发明的时间共享技术允许设计具有许多重用模式的小区系统。 公开了提供良好的操作特性和低同信道干扰的几种特定的小区重用模式。 本发明允许在常规蜂窝系统中使用少量的蜂窝频率，而不会对现有系统进行显着改变，并且在双向蜂窝寻呼系统中特别有用。 改进的反向链路数据吞吐量通过反向频率信道的重用来实现。

    Method and apparatus for low power mobile unit for cellular communications system
    8.
    发明授权
    Method and apparatus for low power mobile unit for cellular communications system 失效
    用于蜂窝通信系统的低功率移动单元的方法和装置

    公开(公告)号：US6058289A

    公开(公告)日：2000-05-02

    申请号：US533682

    申请日：1995-09-26

    申请人： Steven Holmsen Gardner ,  Carl Thomas Hardin ,  James E. Petranovich

    发明人： Steven Holmsen Gardner ,  Carl Thomas Hardin ,  James E. Petranovich

    IPC分类号： H04B1/16 ,  H04W48/16 ,  H04W52/02 ,  H04Q7/08 ,  H04Q7/10 ,  H04Q7/12

    CPC分类号： H04W48/16 ,  H04W52/0245 ,  Y02B60/50

    摘要： A method and apparatus for efficient use of both power and bandwidth in a cellular communications system in which a Mobile Unit preferably enters Sleep-Mode when no communications have occurred between the Mobile Unit and the Base Station over a predetermined amount of time measured by an "Idle Timer". Upon expiry of a Wake Timer, the Mobile Unit awakes from Sleep-Mode to determine whether a message is pending. Concurrently, the Base Station transmits a "TEI-Notification" message directed to all Mobile Units to notify each Mobile Unit that has data pending. A system parameter determines the intervals at which the Base Station will transmit these notifications. Upon waking to receive a TEI-Notification message, the Mobile Unit determines whether the quality of the transmission is at least sufficient to allow the Mobile Unit to decipher the TEI-Notification message. If this minimal requirement is met, and the TEI-Notification message does not indicate that data is pending for the Mobile Unit, the Mobile Unit returns to sleep, even though the Mobile Unit may reside in a cell other than the cell associated with the Base Station currently assigned by the IS to communicate with the Mobile Unit. The Mobile Unit of the present invention does not monitor the forward channels on a regular basis, but rather waits until either the signal quality of the forward channel over which the Mobile Unit is receiving has degraded such that the TEI-Notification message can no longer be deciphered, or the TEI-Notification message indicates that a message is pending.

    摘要翻译： 一种用于在蜂窝通信系统中有效使用功率和带宽的方法和装置，其中当移动单元和基站之间没有发生通信时，移动单元优选地进入睡眠模式，预定时间量由“ 空闲计时器“。 在唤醒定时器到期后，移动单元从休眠模式唤醒，以确定消息是否处于待机状态。 同时，基站发送指向所有移动单元的“TEI通知”消息，以通知具有数据待处理的每个移动单元。 系统参数确定基站将发送这些通知的间隔。 在醒来接收到TEI通知消息时，移动单元确定传输的质量是否至少足以允许移动单元解密TEI通知消息。 如果满足该最小要求，并且TEI通知消息不表示移动单元的数据未被处理，则移动单元返回睡眠，即使移动单元可以驻留在与基站相关联的小区之外的小区中 目前由IS分配的站与移动单元进行通信。 本发明的移动单元不经常监视前向信道，而是等待直到移动单元正在接收的前向信道的信号质量已经降低，使得TEI通知消息不再是 解密，或TEI通知消息指示消息正在等待。