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公开(公告)号：US5335251A
公开(公告)日：1994-08-02
申请号：US995077
申请日：1992-12-22
CPC分类号： H04L1/02 , H04B7/0822 , H04L25/03063
摘要： A diversity receiver includes a first antenna and a second antenna. A first receiving section connected to the first antenna serves to convert a digital modulation wave induced at the first antenna into a first intermediate-frequency signal. A first band pass filter connected to the first receiving section serves to subject the first intermediate-frequency signal to a band pass filtering process. A second receiving section connected to the second antenna serves to convert a digital modulation wave induced at the second antenna into a second intermediate-frequency signal. A second band pass filter connected to the second receiving section serves to subject the second intermediate-frequency signal to a band pass filtering process. A switch alternately selects one of output signals of the first and second band pass filters at a period equal to a half of a period corresponding to the symbol rate. A quadrature demodulator connected to the switch serves to demodulate an output signal of the switch into quadrature baseband signals. An analog-to-digital converter connected to the quadrature demodulator converts the quadrature baseband signals into corresponding digital signals. A decision feedback adaptive equalizer connected to the analog-to-digital converter serves to subject the digital signals to an equalizing process.
摘要翻译： 分集接收机包括第一天线和第二天线。 连接到第一天线的第一接收部分用于将在第一天线处感应的数字调制波转换为第一中频信号。 连接到第一接收部分的第一带通滤波器用于使第一中频信号进行带通滤波处理。 连接到第二天线的第二接收部分用于将在第二天线处感应的数字调制波转换为第二中频信号。 连接到第二接收部分的第二带通滤波器用于使第二中频信号进行带通滤波处理。 交换机以等于对应于符号率的周期的一半的周期交替地选择第一和第二带通滤波器的输出信号之一。 连接到开关的正交解调器用于将开关的输出信号解调为正交基带信号。 连接到正交解调器的模数转换器将正交基带信号转换成相应的数字信号。 连接到模数转换器的判决反馈自适应均衡器用于对数字信号进行均衡处理。
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2.发明授权
公开(公告)号：US5555247A
公开(公告)日：1996-09-10
申请号：US515607
申请日：1995-08-16
CPC分类号： H04L7/042 , H03L7/085 , H04J3/06 , H04L7/0331 , H04L7/08
摘要： In a frame synchronizing apparatus for a receiver apparatus of a digital data radio communications system in which data are transmitted in frame periods with a fixed data sequence contained each frame, a data correlation circuit obtains successive sequences of values of vector difference between vector values constituting a demodulated digital baseband signal, and successively compares these sequences with a fixed vector difference sequence corresponding to the fixed data sequence, to derive a correlation signal substantially unaffected by any phase rotation in the baseband signal. A frame synchronizing circuit formed as a PLL for generating a frame synchronizing signal, includes a phase comparator which periodically indicates whether a detected phase difference between the correlation signal and frame synchronizing signal is effectively zero, positive or negative, and a counter holding a count value indicating a cumulative phase error between these signals. So long as the detected phase differences are successively effectively zero and the cumulative phase error is sufficiently small, the phase of the frame synchronizing signal is held unchanged, thereby achieving a high degree of phase stability.
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3.发明授权Frame synchronizing apparatus for quadrature modulation data communication radio receiver 失效正交调制数据通信无线电接收机的帧同步装置
公开(公告)号：US5463627A
公开(公告)日：1995-10-31
申请号：US200592
申请日：1994-02-23
CPC分类号： H04L7/042 , H03L7/085 , H04J3/06 , H04L7/0331 , H04L7/08
摘要： In a frame synchronizing apparatus for a receiver apparatus of a digital data radio communications system in which data are transmitted in frame periods with a fixed data sequence contained each frame, a data correlation circuit obtains successive sequences of values of vector difference between vector values constituting a demodulated digital baseband signal, and successively compares these sequences with a fixed vector difference sequence corresponding to the fixed data sequence, to derive a correlation signal substantially unaffected by any phase rotation in the baseband signal. A frame synchronizing circuit formed as a PLL for generating a frame synchronizing signal, includes a phase comparator which periodically indicates whether a detected phase difference between the correlation signal and frame synchronizing signal is effectively zero, positive or negative, and a counter holding a count value indicating a cumulative phase error between these signals. So long as the detected phase differences are successively effectively zero and the cumulative phase error is sufficiently small, the phase of the frame synchronizing signal is held unchanged, thereby achieving a high degree of phase stability.
摘要翻译： 在数字数据无线电通信系统的接收机装置的帧同步装置中，数据在具有包含每一帧的固定数据序列的帧周期中被发送，数据相关电路获得构成矢量的矢量值之间的向量差的值的连续序列 解调的数字基带信号，并且将这些序列与对应于固定数据序列的固定向量差异序列连续地进行比较，以导出基本上不受基带信号中的任何相位旋转影响的相关信号。 形成为用于产生帧同步信号的PLL的帧同步电路包括周期性地指示相关信号和帧同步信号之间的检测到的相位差是否为零或正的负相位的相位比较器，以及保持计数值的计数器 表示这些信号之间的累积相位误差。 只要检测到的相位差连续有效地为零并且累积相位误差足够小，则帧同步信号的相位保持不变，从而实现高度的相位稳定性。
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4.发明授权Terminal unit apparatus for time division multiplexing access communications system 失效用于时分复用接入通信系统的终端装置
公开(公告)号：US5200977A
公开(公告)日：1993-04-06
申请号：US660054
申请日：1991-02-25
申请人： Hiroshi Ohnishi , Yuuri Yamamoto , Kouei Misaizu
发明人： Hiroshi Ohnishi , Yuuri Yamamoto , Kouei Misaizu
CPC分类号： H03H21/0012 , H04B7/005
摘要： A terminal unit apparatus for a time division multiplexing access radio communications system formed of a base station and a number of terminal units remote from the base station, includes a 2-dimensional adaptive equalizer circuit for equalizing two quadrature-relationship baseband signals which are obtained from a received quadrature digital modulation signal during receiving operation of the terminal unit, and an internal signal source which generates a local oscillator signal for use in demodulating a received signal to obtain these baseband signals. A frequency correction quantity is derived from the average rate of variation in each symbol interval of the ratio of the two main tap coefficients of the 2-dimensional adaptive equalizer circuit, and used to correct the frequency of operation of the internal signal source during both receiving operation and also in transmitting operation, in which the internal signal source provides a carrier signal for modulation. Frequency correction can thereby be achieved that is independent of the effects of multi-path interference to the transmission path upon the received quadrature digital modulation signal.
摘要翻译： 一种用于由基站和远离该基站的多个终端单元形成的时分复用接入无线电通信系统的终端单元装置，包括：二维自适应均衡器电路，用于均衡两个正交关系基带信号， 在终端单元的接收操作期间接收的正交数字调制信号，以及产生用于解调接收信号以获得这些基带信号的本地振荡器信号的内部信号源。 从二维自适应均衡器电路的两个主抽头系数的比率的每个符号间隔的平均变化率导出频率校正量，并且用于在两个接收期间校正内部信号源的操作频率 操作和发送操作，其中内部信号源提供用于调制的载波信号。 从而可以实现与接收到的正交数字调制信号时的多路径干扰对传输路径的影响的频率校正。
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公开(公告)号：US5426669A
公开(公告)日：1995-06-20
申请号：US077586
申请日：1993-06-17
IPC分类号： H04L7/033 , H04L27/233 , H03D3/18 , H04L27/06
CPC分类号： H04L7/0334 , H04L27/2332
摘要： A quadrature demodulator includes a device for generating first and second reference signals having a quadrature relation with each other. A first demodulating device serves to compare phases of the first reference signal and an input modulated signal to demodulate the input modulated signal into a first binary baseband signal. A second demodulating device serves to compare phases of the second reference signal and the input modulated signal to demodulate the input modulated signal into a second binary baseband signal having a quadrature relation with the first baseband signal. A first counting device operates to count pulses of a clock signal in response to the first baseband signal. A second counting device operates to count pulses of the clock signal in response to the second baseband signal. An address signal is generated in response to the output signals of the first and second counting devices. Data representative of an absolute phase of the input modulated signal is generated in response to the address signal.
摘要翻译： 正交解调器包括用于产生彼此具有正交关系的第一和第二参考信号的装置。 第一解调装置用于比较第一参考信号和输入调制信号的相位，以将输入的调制信号解调为第一二进制基带信号。 第二解调装置用于比较第二参考信号和输入调制信号的相位，以将输入调制信号解调成与第一基带信号具有正交关系的第二二进制基带信号。 第一计数装置用于响应于第一基带信号来计数时钟信号的脉冲。 第二计数装置用于响应于第二基带信号对时钟信号的脉冲进行计数。 响应于第一和第二计数装置的输出信号产生地址信号。 响应于地址信号产生表示输入调制信号的绝对相位的数据。
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公开(公告)号：US5550867A
公开(公告)日：1996-08-27
申请号：US417528
申请日：1995-04-06
IPC分类号： H04L7/033 , H04L27/233 , H04L27/06
CPC分类号： H04L7/0334 , H04L27/2332
摘要： A complex angle converter includes a comparing device. The comparing device operates to derive first difference data representing a difference between predetermined reference data and data represented by a first baseband signal. The comparing device further operates to derive second difference data representing a difference between the predetermined reference data and data represented by a second baseband signal having a quadrature relation with the first baseband signal. The comparing device further operates for comparing absolute values of the first difference data and the second difference data, and for outputting a signal representative of a result of the comparing. The complex angle converter also includes a device serving to group an inversion of a highest bit of the first baseband signal and second highest and lower bits of the second baseband signal into a first set. An additional device serves to group a highest bit of the second baseband signal and second highest and lower bits of the first baseband signal into a second set. A selector operates to select one of the first set and the second set in response to the output signal of the comparing device. A decoder is included for decoding the highest bit of the first baseband signal, the highest bit of the second baseband signal, and the selected one of the first set and the second set into data representing a complex angle.
摘要翻译： 复角度转换器包括比较装置。 比较装置用于导出表示预定参考数据和由第一基带信号表示的数据之间的差异的第一差分数据。 比较装置进一步操作以得出表示预定参考数据与由与第一基带信号具有正交关系的第二基带信号表示的数据之间的差异的第二差分数据。 比较装置还用于比较第一差分数据和第二差分数据的绝对值，并输出表示比较结果的信号。 复角转换器还包括用于将第一基带信号的最高位和第二基带信号的第二高位和低位的反转分组为第一组的装置。 附加设备用于将第二基带信号的最高位和第一基带信号的第二高位和低位分组成第二组。 选择器响应于比较装置的输出信号选择第一组和第二组中的一个。 包括解码器，用于将第一基带信号的最高位，第二基带信号的最高位和第一组和第二组中选定的一个译码成表示复角的数据。
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7.发明授权Method and apparatus for radio communication with improved automatic frequency control 失效具有改进的自动频率控制的无线电通信的方法和装置
公开(公告)号：US5115515A
公开(公告)日：1992-05-19
申请号：US367577
申请日：1989-06-19
申请人： Yuuri Yamamoto , Mitsuo Makimoto
发明人： Yuuri Yamamoto , Mitsuo Makimoto
CPC分类号： H03J7/06
摘要： A base station transmits a radio-frequency signal to a mobile station. The radio-frequency signal includes a frequency calibration signal. The mobile station includes a receiver receiving the radio-frequency signal. The receiver includes a referance oscillator generating a reference signal whose frequency is controlled in accordance with the frequency calibration signal. The receiver includes mixers and local oscillators. The mixers mix the radio-frequency signal with local oscillator signals from the local oscillator signals and convert the radio-frequency signal into a corresponding intermediate-frequency signal. The local oscillator signals are synchronized with the reference signal. The frequency of the intermediate-frequency signal is divided to derive a frequency-divided signal. The frequency of the reference signal is controlled in accordance with the frequency-divided signal.
摘要翻译： 基站向移动台发送射频信号。 射频信号包括频率校准信号。 移动站包括接收射频信号的接收机。 接收机包括产生参考信号的参考振荡器，其频率根据频率校准信号被控制。 接收机包括混频器和本地振荡器。 混频器将射频信号与本地振荡器信号的本地振荡器信号混合，并将射频信号转换为相应的中频信号。 本地振荡器信号与参考信号同步。 中频信号的频率被分割以得到分频信号。 参考信号的频率根据分频信号进行控制。
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公开(公告)号：US20050058104A1
公开(公告)日：2005-03-17
申请号：US10942122
申请日：2004-09-16
IPC分类号： H04L5/14 , H04B1/707 , H04B7/015 , H04B7/15 , H04B7/155 , H04B7/26 , H04J11/00 , H04J13/00 , H04L27/26 , H04W16/26 , H04W84/18 , H04B7/216
CPC分类号： H04B7/15528 , H04L27/2602
摘要： A relay apparatus, terminal apparatus and relay method for relaying signals with a reduced scale of the apparatus, without temporally switching between transmission and reception and with reduced waste of time when relay is performed at the same frequency on a radio communication network on which bidirectional communication is performed. A radio reception section 202 outputs information signals to a switch 208, outputs relay control signals to a demodulation section 204 after subjecting predetermined radio reception processing. The demodulation section 204 demodulates a relay control signal. A relay control signal processing section 206 decides the possibility of relay of information signals and inquires, when the relay is possible, whether the terminal apparatus on the receiving side can receive this information signal or not. Furthermore, the relay control signal processing section 206 connects a switch 208 during the stored relay time. The switch 208 is connected only the information signals to be relayed are received under the control of a relay control section 2063.
摘要翻译： 一种中继装置，终端装置和中继方法，用于在设备的规模缩小的情况下中继信号，而不需要在发送和接收之间进行时间上的切换，并且在双向通信的无线电通信网络上以相同频率执行中继时减少了时间浪费 被执行。 无线接收部202将信息信号输出到开关208，在经过预定的无线接收处理之后，向解调部204输出中继控制信号。 解调部204解调继电器控制信号。 继电器控制信号处理部分206确定信息信号的中继的可能性，并且当继电器可能时，询问接收侧的终端装置是否可以接收该信息信号。 此外，继电器控制信号处理部206在存储的继电器时间期间连接开关208。 在继电器控制部分2063的控制下，开关208只连接待接收的信息信号。
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公开(公告)号：US5703913A
公开(公告)日：1997-12-30
申请号：US684442
申请日：1996-07-19
IPC分类号： H04L7/033 , H04L27/233 , H04L7/00
CPC分类号： H04L7/0334 , H04L27/2332
摘要： A timing signal generator includes a demodulator for an input modulated signal to provide first and second baseband signals having a quadrature relation relative to each other. A converter is used to convert the first and second baseband signals into angle data representing a phase, and a calculator is used to calculate a difference between the phase represented by current angle data and the phase represented by previous angle data, preceding the current angle data by a 1-symbol interval. The calculator outputs data representative of the calculated phase difference. A further converter converts the calculator output data into a binary reference signal responsive to which of predetermined divided regions contains a point corresponding to the calculated difference data. Also included is a generator for generating a symbol timing signal in synchronism with the binary reference signal.
摘要翻译： 定时信号发生器包括用于输入调制信号的解调器，以提供具有彼此正交关系的第一和第二基带信号。 A转换器用于将第一和第二基带信号转换成表示相位的角度数据，并且使用计算器来计算当前角度数据所表示的相位与由当前角度数据之前的先前角度数据表示的相位之间的差 以1符号间隔。 计算器输出表示计算出的相位差的数据。 另外的转换器将计算器输出数据转换成二进制参考信号，响应于哪个预定分割区域包含对应于所计算的差分数据的点。 还包括用于与二进制参考信号同步地产生符号定时信号的发生器。
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10.发明授权公开(公告)号：US07966360B2
公开(公告)日：2011-06-21
申请号：US11833030
申请日：2007-08-02
申请人： Hidekuni Yomo , Yoshinori Kunieda , Yuuri Yamamoto
发明人： Hidekuni Yomo , Yoshinori Kunieda , Yuuri Yamamoto
IPC分类号： G06F17/10
CPC分类号： H03H17/0657 , H03H17/0223 , H03H17/0229 , H03H17/06 , H03H17/0621 , H03H2218/085
摘要： An A/D conversion section performs oversampling on an analog signal at a rate M times a symbol rate to convert the analog signal into a digital signal. A FIR filtering section has two delay-element sequences, each with a plurality of delay elements. The two delay-element sequences have different delay directions, i.e., a forward direction and a reverse direction. The delay directions can be switched, and according to a finite impulse response train having such delay-element sequences, a convolutional calculation is performed. A phase determining section determines a phase used in making a decision in a decision section. The decision section makes a decision on a filtered signal using the phase determined in the phase determining section to generate bit data. A digital signal receiving apparatus is thus achieved which determines a phase with a high accuracy without increasing the oversampling number, and performs a fast calculation while having a reduced circuitry scale.
摘要翻译： A / D转换部分以符号速率M倍的模拟信号执行过采样，以将模拟信号转换为数字信号。 FIR滤波部分具有两个具有多个延迟元件的延迟元件序列。 两个延迟元件序列具有不同的延迟方向，即正向和反向。 可以切换延迟方向，并且根据具有这种延迟元件序列的有限脉冲响应列，进行卷积计算。 相位确定部确定在判定部中作出判定所使用的相位。 决定部分使用在相位确定部分中确定的相位来对滤波信号做出决定以产生位数据。 因此，实现了数字信号接收装置，其在不增加过采样数量的情况下确定高精度的相位，并且在具有减小的电路规模的情况下执行快速计算。
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