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    Subscriber unit for wireless digital subscriber communication system
    1.
    发明授权
    Subscriber unit for wireless digital subscriber communication system 失效
    无线数字用户通信系统用户单元

    公开(公告)号：US5008900A

    公开(公告)日：1991-04-16

    申请号：US394497

    申请日：1989-08-14

    申请人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson ,  George A. Wiley

    发明人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson ,  George A. Wiley

    IPC分类号： H04M1/00 ,  H03B28/00 ,  H03C3/00 ,  H03D3/00 ,  H04B1/40 ,  H04B3/00 ,  H04B7/00 ,  H04J3/02 ,  H04L25/03 ,  H04L27/00 ,  H04L27/18 ,  H04L27/20 ,  H04W84/16

    CPC分类号： H03D3/007 ,  H04L27/00 ,  H04L27/2092 ,  H03B28/00 ,  H03C3/00 ,  H04L2025/03375 ,  H04L2025/03477

    摘要： A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.

    摘要翻译： 用于与无线用户通信系统中的基站进行无线通信的用户单元包括FIR芯片，DIF（数字中频）芯片，单个处理器芯片和无线电装置。 处理器芯片对数字语音输入信号进行转码以提供数字输入符号; 解调从基站接收的输出信号以提供数字输出符号; 并从数字输出符号合成数字语音输出信号。 FIR芯片FIR对数字输入符号进行滤波，并产生用于对处理器芯片中的代码转换和合成操作进行定时的定时信号。 DIF芯片通过直接数字合成（DDS）数字合成数字中频信号，并用滤波后的输入符号对数字中频信号进行调制，以提供调制中频输入​​信号。 无线电进一步处理调制的输入信号以传输到基站。

    Subscriber unit for wireless digital subscriber communication system
    2.
    发明授权
    Subscriber unit for wireless digital subscriber communication system 失效
    无线数字合成器通信系统用户单元

    公开(公告)号：US5325396A

    公开(公告)日：1994-06-28

    申请号：US940662

    申请日：1992-09-04

    申请人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson ,  George A. Wiley

    发明人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson ,  George A. Wiley

    IPC分类号： H04M1/00 ,  H03B28/00 ,  H03C3/00 ,  H03D3/00 ,  H04B1/40 ,  H04B3/00 ,  H04B7/00 ,  H04J3/02 ,  H04L25/03 ,  H04L27/00 ,  H04L27/18 ,  H04L27/20 ,  H04W84/16 ,  H03K3/80

    CPC分类号： H03D3/007 ,  H04L27/00 ,  H04L27/2092 ,  H03B28/00 ,  H03C3/00 ,  H04L2025/03375 ,  H04L2025/03477

    摘要： A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.

    摘要翻译： 用于与无线用户通信系统中的基站进行无线通信的用户单元包括FIR芯片，DIF（数字中频）芯片，单个处理器芯片和无线电装置。 处理器芯片对数字语音输入信号进行转码以提供数字输入符号; 解调从基站接收的输出信号以提供数字输出符号; 并从数字输出符号合成数字语音输出信号。 FIR芯片FIR对数字输入符号进行滤波，并产生用于对处理器芯片中的代码转换和合成操作进行定时的定时信号。 DIF芯片通过直接数字合成（DDS）数字合成数字中频信号，并用滤波后的输入符号对数字中频信号进行调制，以提供调制中频输入​​信号。 无线电进一步处理调制的输入信号以传输到基站。

    Subscriber unit for wireless digital subscriber communication system
    3.
    发明授权
    Subscriber unit for wireless digital subscriber communication system 失效
    无线数字用户通信系统用户单元

    公开(公告)号：US5146473A

    公开(公告)日：1992-09-08

    申请号：US658065

    申请日：1991-02-20

    申请人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson

    发明人： David N. Critchlow ,  Moshe Yehushua ,  Graham M. Avis ,  Wade L. Heimbigner ,  Karle J. Johnson

    IPC分类号： G06F1/035 ,  H03B28/00 ,  H03C3/00 ,  H03D3/00 ,  H04L23/00 ,  H04L25/03 ,  H04L27/00 ,  H04L27/04 ,  H04L27/06 ,  H04L27/12 ,  H04L27/20

    CPC分类号： H04L25/03343 ,  H03D3/007 ,  H04L27/00 ,  H04L27/2092 ,  H03B28/00 ,  H03C3/00 ,  H04L2025/03375 ,  H04L2025/03477

    摘要： A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice input signal to provide digital input symbols; demodulates an output signal received from the base station to provide digital output symbols; and synthesizes a digital voice output signal from the digital output symbols. The FIR chip FIR filters the digital input symbols and generates timing signals for timing the transcoding and synthesizing operations in the processor chip. The DIF chip digitally synthesizes a digital intermediate frequency signal by direct digital synthesis (DDS) and modulates the digital intermediate frequency signal with the filtered input symbols to provide a modulated intermediate frequency input signal. The radio further processes the modulated input signal for transmission to the base station.

    摘要翻译： 用于与无线用户通信系统中的基站进行无线通信的用户单元包括FIR芯片，DIF（数字中频）芯片，单个处理器芯片和无线电装置。 处理器芯片对数字语音输入信号进行转码以提供数字输入符号; 解调从基站接收的输出信号以提供数字输出符号; 并从数字输出符号合成数字语音输出信号。 FIR芯片FIR对数字输入符号进行滤波，并产生用于对处理器芯片中的代码转换和合成操作进行定时的定时信号。 DIF芯片通过直接数字合成（DDS）数字合成数字中频信号，并用滤波后的输入符号对数字中频信号进行调制，以提供调制中频输入​​信号。 无线电进一步处理调制的输入信号以传输到基站。

    Digital time-multiplexed quadrature frequency upconverter
    4.
    发明授权
    Digital time-multiplexed quadrature frequency upconverter 失效
    数字时分复用正交频率上变频器

    公开(公告)号：US5101418A

    公开(公告)日：1992-03-31

    申请号：US256420

    申请日：1988-10-12

    申请人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. K. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    发明人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. K. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    IPC分类号： H04B7/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/06 ,  H03L7/095 ,  H04B1/38 ,  H04B1/50 ,  H04B7/005 ,  H04L27/152 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  H04M1/00 ,  H04M1/253 ,  H04M1/725 ,  H04M11/06 ,  H04Q7/20 ,  H04Q7/38

    CPC分类号： H04M1/72502 ,  H03D3/006 ,  H03D7/165 ,  H03H17/0657 ,  H03L7/095 ,  H04B1/50 ,  H04L27/1525 ,  H04L27/2338 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0058 ,  H03D2200/0062 ,  H03D2200/0082 ,  H03D3/007 ,  H03D7/161

    摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to a storage for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out device may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filted to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations of the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer.

    摘要翻译： 一种用于与基站无线连接的数字无线用户电话单元。 用户单元具有耦合到用于基带功能的存储器的基带处理器。 基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。 调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定装置。 来自调制解调器处理器的信号被转换为模拟信号，该模拟信号经过去抖动，然后去角化信号被上变频和滤波，以形成IF信号，此后被放大。 放大的IF信号与由合成器产生的信号组合以提供RF信号。 基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。 在系统的致动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF的不期望的变化，这些常数被存储用于校正 实际接收信号。 在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。 解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

    AM equalizer circuit for digital systems
    5.
    发明授权
    AM equalizer circuit for digital systems 失效
    AM均衡器电路用于数字系统

    公开(公告)号：US4881240A

    公开(公告)日：1989-11-14

    申请号：US256557

    申请日：1988-10-12

    申请人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    发明人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    IPC分类号： H04B7/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/06 ,  H03L7/095 ,  H04B1/38 ,  H04B1/50 ,  H04B7/005 ,  H04L27/152 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  H04M1/00 ,  H04M1/253 ,  H04M1/725 ,  H04M11/06 ,  H04Q7/20 ,  H04Q7/38

    CPC分类号： H04M1/72502 ,  H03D3/006 ,  H03D7/165 ,  H03H17/0657 ,  H03L7/095 ,  H04B1/50 ,  H04L27/1525 ,  H04L27/2338 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0058 ,  H03D2200/0062 ,  H03D2200/0082 ,  H03D3/007 ,  H03D7/161

    摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer.

    摘要翻译： 一种用于与基站无线连接的数字无线用户电话单元。 用户单元具有耦合到用于基带功能的存储设备的基带处理器。 基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。 调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定电路。 来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。 放大的IF信号与由合成器产生的信号组合以提供RF信号。 基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。 在系统的启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中的不期望的变化，这些常数被存储用于校正 实际接收信号。 在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。 解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

    Digital signals and frequency correction in a digital wireless system
    7.
    发明授权
    Digital signals and frequency correction in a digital wireless system 失效
    数字信号和数字无线系统中的频率校正

    公开(公告)号：US4893317A

    公开(公告)日：1990-01-09

    申请号：US256415

    申请日：1988-10-12

    申请人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    发明人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    IPC分类号： H04B7/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/06 ,  H03L7/095 ,  H04B1/38 ,  H04B1/50 ,  H04B7/005 ,  H04L27/152 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  H04M1/00 ,  H04M1/253 ,  H04M1/725 ,  H04M11/06 ,  H04Q7/20 ,  H04Q7/38

    CPC分类号： H04M1/72502 ,  H03D3/006 ,  H03D7/165 ,  H03H17/0657 ,  H03L7/095 ,  H04B1/50 ,  H04L27/1525 ,  H04L27/2338 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0058 ,  H03D2200/0062 ,  H03D2200/0082 ,  H03D3/007 ,  H03D7/161

    摘要： A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a modem processor whereby the two processors may communicate with each other. The modem processor generally acts as the master in the system, although lock-out circuit may be used in certain circumstances. The signal from the modem processor is converted to an analog signal, which is subjected to deglitching, and the deglitched signal is then upconverted and filtered to form an IF signal which is thereafter amplified. The amplified IF signal is combined with a signal generated by a synthesizer to provide an RF signal. On the basis of certain signals received from the base station, the baseband processor produces initiating signals which determine whether the subscriber unit will be in the transmit mode or the receive mode. In intervals between actuation of the system, a training mode is used wherein a known signal from the modem processor is compared with a looped-back signal to produce correction constants to compensate for undesirable variations in the IF, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors and for production of a frequency correction signal which is used to correct any errors in the timing of the system and in the output of the synthesizer. 2

    摘要翻译： 一种用于与基站无线连接的数字无线用户电话单元。 用户单元具有耦合到用于基带功能的存储设备的基带处理器。 基带处理器是与调制解调器处理器相连的直接访问器，由此两个处理器可以彼此进行通信。 调制解调器处理器通常用作系统中的主机，尽管在某些情况下可以使用锁定电路。 来自调制解调器处理器的信号被转换成模拟信号，该模拟信号经过去抖动，然后将去抖动信号上变频和滤波，以形成IF信号，此后被放大。 放大的IF信号与由合成器产生的信号组合以提供RF信号。 基于从基站接收到的某些信号，基带处理器产生确定用户单元是处于发送模式还是接收模式的启动信号。 在系统的启动之间的间隔中，使用训练模式，其中将来自调制解调器处理器的已知信号与环回信号进行比较以产生校正常数以补偿IF中的不期望的变化，这些常数被存储用于校正 实际接收信号。 在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。 解复用的I和Q采样被馈送到均衡器和频率校正电路，用于最小化误差并产生用于校正系统的定时和合成器的输出中的任何误差的频率校正信号。

    Automatic adaptive equalizer
    8.
    发明授权
    Automatic adaptive equalizer 失效
    自动均衡器

    公开(公告)号：US5168507A

    公开(公告)日：1992-12-01

    申请号：US433995

    申请日：1989-11-09

    申请人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. K. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    发明人： David N. Critchlow ,  Graham M. Avis ,  Sandra J. K. Earlam ,  Karle J. Johnson ,  Bruce A. Smetana ,  Gregory L. Westling ,  Eric Paneth ,  Moshe Yehushua

    IPC分类号： H03D3/00 ,  H03D7/16 ,  H04L27/233

    CPC分类号： H04L27/2338 ,  H03D7/165 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0058 ,  H03D2200/0062 ,  H03D2200/0082 ,  H03D3/007 ,  H03D7/161

    摘要： A digital wireless subscriber telephone unit for wireless communication with a base station. An IF is used within the subscriber unit and base station which is combined with a carrier signal generated by a synthesizer for RF transmission between stations. In intervals between actuation of the system, a training mode is used wherein a known training signal is compared with a known values to produce correction coefficients to compensate for undesirable variations in timing and/or frequency, these constants being stored for use in correcting actual received signals. During demodulation, the modulated digital signals are fed to the modem processor in the form of time multiplexed I and Q samples and are demultiplexed. The demultiplexed I and Q samples are fed to an equalizer and frequency correction circuit for minimization of errors for production of a frequency correction signal based upon the correction coefficients which is used to correct any errors in the timing and frequency of the system.

    摘要翻译： 一种用于与基站进行无线通信的数字无线用户电话单元。 在用户单元和基站中使用IF，其与由合成器生成的载波信号组合以在站之间进行RF传输。 在系统的致动之间的间隔中，使用训练模式，其中将已知训练信号与已知值进行比较以产生校正系数以补偿定时和/或频率中不期望的变化，这些常数被存储以用于校正实际接收 信号。 在解调期间，经调制的数字信号以时分复用I和Q采样的形式馈送到调制解调处理器，并被解复用。 解复用的I和Q采样被馈送到均衡器和频率校正电路，用于基于用于校正系统的定时和频率中的任何误差的校正系数来最小化用于产生频率校正信号的误差。