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公开(公告)号：US5381448A
公开(公告)日：1995-01-10
申请号：US871691
申请日：1992-04-21
申请人： Kazuhisa Tsubaki , Mitsuru Uesugi , Kouichi Honma
发明人： Kazuhisa Tsubaki , Mitsuru Uesugi , Kouichi Honma
CPC分类号： H04B7/01
摘要： A data receiving apparatus capable of correctly obtaining decoded data of a received signal even if the center frequency of the received signal has a frequency shift and the state of transmission line changes with time. The coefficient of an equalizer is calculated basing upon an error signal obtained from the received signal and a shift of the center frequency obtained from the error signal. The coefficient is renewed each time a new received signal is supplied.
摘要翻译： 即使接收信号的中心频率具有频移，传输线的状态随时间而变化，能够正确地获取接收信号的解码数据的数据接收装置。 基于从接收信号获得的误差信号和从误差信号获得的中心频率的偏移来计算均衡器的系数。 每当提供新的接收信号时，系数更新。
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公开(公告)号：US5388123A
公开(公告)日：1995-02-07
申请号：US871810
申请日：1992-04-21
申请人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
发明人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
IPC分类号： H03H17/00 , H03H15/00 , H03H17/06 , H03H21/00 , H04B3/14 , H04B7/005 , H04B7/26 , H04L25/03 , H03K5/159
CPC分类号： H04L25/03044 , H03H17/06 , H04L25/03057 , H04L2025/03573 , H04L2025/03579
摘要： According to the present invention, a large compensation effect can be obtained in a small operation volume regardless of which one of a distortion due to a frequency selective fading and a distortion due to an interference of adjacent waves is ruling. In the present invention, a principal wave signal and signals of channels adjacent to both sides of said principal wave are taken out, and power of these signals is compared to select either one of the fractional interval equalizer and the linear decision feedback equalizer.
摘要翻译： 根据本发明，可以在小的操作体积中获得大的补偿效果，而不管由于频率选择性衰落引起的失真和由于相邻波浪的干扰引起的变形。 在本发明中，取出主波信号和与主波两侧相邻的声道的信号，比较这些信号的功率，选择分数间隔均衡器和线性判决反馈均衡器中的任一个。
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公开(公告)号：US5425037A
公开(公告)日：1995-06-13
申请号：US840164
申请日：1992-02-24
申请人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
发明人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
CPC分类号： H04L25/067 , H04L1/0054
摘要： A data transmission apparatus with an improved error-rate characteristic after soft decision decoding by improving a decoder input such that, according to an embodiment, digital data such as voice data transmitted after being applied with coding and modulation are received, and are demodulated by a demodulator as a working mode thereof. A square mean value of errors is obtained by an error calculator on a demodulator output, and(1-e.sup.-2x/.sigma..spsp.2)/(1+e.sup.-2x/.sigma..spsp.2)is computed by a likelihood calculator and adopted as a decoder input.
摘要翻译： 一种数据传输装置，其通过改进解码器输入而在软判决解码之后具有改进的差错率特性，使得根据实施例，接收到应用编码和调制之后发送的诸如语音数据的数字数据，并且由 解调器作为其工作模式。 通过解调器输出上的误差计算器获得平均误差值，并且由似然计算器计算（1-e-2x / sigma2）/（1 + e-2x / sigma2）并将其作为解码器 输入。
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公开(公告)号：US5563911A
公开(公告)日：1996-10-08
申请号：US395828
申请日：1995-02-28
申请人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
发明人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
IPC分类号： H04B7/005 , H03H17/00 , H03H17/02 , H03H17/04 , H03H17/06 , H03H21/00 , H04B3/06 , H04L25/03
CPC分类号： H04B7/005 , H03H17/0288 , H04L25/03057 , H04L2025/03573
摘要： In an equalizer including a plurality of delay elements, a plurality of weighting elements and an adder, the impulse response of a signal transmission channel is estimated to selectively switch over a plurality of selector switches associated with the inputs and outputs of the respective delay elements, thereby selectively changing the combination of the delay elements and the weighting elements transmitting an input signal from the channel to the adder and also changing the combination of the adder and a delay element feeding back the output of the discriminator to the adder. Thus, the number of required taps of the equalizer can be reduced, so that the power consumption and size of the equalizer can be reduced.
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5.发明授权Apparatus and method for detecting place of burst signals in time division multiplex communication system 失效在时分复用通信系统中检测突发信号位置的装置和方法
公开(公告)号：US5524282A
公开(公告)日：1996-06-04
申请号：US672938
申请日：1991-03-21
申请人： Kouichi Honma , Mitsuru Uesugi , Kazuhisa Tsubaki
发明人： Kouichi Honma , Mitsuru Uesugi , Kazuhisa Tsubaki
CPC分类号： H04L7/04
摘要： An apparatus and a method utilized in the field of time division multiplex digital communications or the like for detecting the place of burst signals. A transmitter transmits a carrier wave modulated by message data signals having a reference signal inserted between them, and a receiver receives the transmitted modulated carrier wave. In the receiver, the received modulated carrier wave is demodulated by both a sine wave and a cosine wave each having an angular frequency deviation .DELTA..omega. relative to the received carrier waved, the phase difference between the demodulated message data signals and the modulated reference signal is detected, the time-based change of the detected phase difference is approximated by a function of low order, the error between the phase of the received reference signal and that computed on the basis of the approximation function is computed, and a burst place detection signal is generated when the computed error is smaller than a predetermined threshold value.
摘要翻译： 在时分复用数字通信等领域中使用的用于检测突发信号的位置的装置和方法。 发射机发送由具有插入在它们之间的参考信号的消息数据信号调制的载波，并且接收机接收发送的调制载波。 在接收机中，接收到的调制载波通过正弦波和余弦波被解调，每个正弦波和余弦波相对于所接收的载波波形具有角频率偏差ΔωTA，解调的消息数据信号和调制参考信号之间的相位差是 检测到的检测出的相位差的基于时间的变化由低阶函数近似，计算接收到的参考信号的相位与基于近似函数计算的相位之间的误差，以及突发位置检测信号 当计算出的误差小于预定阈值时产生。
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公开(公告)号：US5444739A
公开(公告)日：1995-08-22
申请号：US937403
申请日：1992-08-31
申请人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
发明人： Mitsuru Uesugi , Kazuhisa Tsubaki , Kouichi Honma
IPC分类号： H04B7/005 , H03H17/00 , H03H17/02 , H03H17/04 , H03H17/06 , H03H21/00 , H04B3/06 , H04L25/03
CPC分类号： H04B7/005 , H03H17/0288 , H04L25/03057 , H04L2025/03573
摘要： In an equalizer including a plurality of delay elements, a plurality of weighting elements and an adder, the impulse response of a signal transmission channel is estimated to selectively switch over a plurality of selector switches associated with the inputs and outputs of the respective delay elements, thereby selectively changing the combination of the delay elements and the weighting elements transmitting an input signal from the channel to the adder and also changing the combination of the adder and a delay element feeding back the output of the discriminator to the adder. Thus, the number of required taps of the equalizer can be reduced, so that the power consumption and size of the equalizer can be reduced.
摘要翻译： 在包括多个延迟元件的均衡器，多个加权元件和加法器中，估计信号传输通道的脉冲响应以有选择地切换与相应延迟元件的输入和输出相关联的多个选择器开关， 从而选择性地改变延迟元件和从通道传输输入信号到加法器的加权元件的组合，并且还改变加法器和将鉴别器的输出反馈给加法器的延迟元件的组合。 因此，可以减少均衡器所需的抽头的数量，从而可以减小均衡器的功耗和尺寸。
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公开(公告)号：US5414737A
公开(公告)日：1995-05-09
申请号：US975695
申请日：1992-11-13
申请人： Mitsuru Uesugi , Yoshiko Saito , Kazuhisa Tsubaki , Kouichi Honma
发明人： Mitsuru Uesugi , Yoshiko Saito , Kazuhisa Tsubaki , Kouichi Honma
CPC分类号： H04L1/203 , H04L1/0054
摘要： A data decoding device eliminates the need for encoding by a decoder for estimating an error rate and can estimate the error rate at a high precision even if an error is included. A square error sum is calculated by an error calculator based on an output of an equalizer. A estimated error rate is determined based on the error sum, a likelihood is determined based on the estimated error rate, and soft discrimination decoding is made based on the likelihood and the output of the equalizer.
摘要翻译： 数据解码装置消除了用于估计误码率的解码器编码的需要，并且即使包括错误也能以高精度估计错误率。 基于均衡器的输出的误差计算器计算平方误差和。 基于误差和来确定估计的误码率，基于估计的误码率确定似然性，并且基于均衡器的似然性和输出进行软鉴别解码。
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公开(公告)号：US5333148A
公开(公告)日：1994-07-26
申请号：US843934
申请日：1992-02-25
申请人： Kazuhisa Tsubaki , Kouji Abe , Mitsuru Uesugi , Kouichi Honma
发明人： Kazuhisa Tsubaki , Kouji Abe , Mitsuru Uesugi , Kouichi Honma
IPC分类号： H04B3/06 , H04B7/26 , H04J3/06 , H04L1/20 , H04L7/08 , H04L27/00 , H03D1/00 , H03H7/30 , H04L7/00 , H04L27/06
CPC分类号： H04L1/20 , H04J3/0602
摘要： A data receiver which enhances a probability of frame synchronization even if a transmission line quality is bad detects a specific bit sequence in a received signal demodulated by a demodulator to deduce a transmission line quality by a line quality deducer. If the transmission line quality is so bad that a frame synchronization detector cannot detect the specific bit sequence, the specific bit sequence is detected from a received signal demodulated by an equalizer after the elimination of a transmission line distortion.
摘要翻译： 即使传输线质量差，增强帧同步概率的数据接收机检测由解调器解调的接收信号中的特定位序列，以通过线路质量推断器推断传输线质量。 如果传输线质量差使得帧同步检测器不能检测到特定比特序列，则在消除传输线失真之后，从均衡器解调的接收信号中检测特定比特序列。
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公开(公告)号：US5276713A
公开(公告)日：1994-01-04
申请号：US768289
申请日：1991-10-10
申请人： Osamu Kato , Kouichi Honma , Kazuhisa Tsubaki
发明人： Osamu Kato , Kouichi Honma , Kazuhisa Tsubaki
摘要： The present invention relates to a frame synchronization method for digital mobile radio communication comprising generating a plurality of pulses having different phases on the basis of an asynchronous frame marker, and generating a synchronous frame marker on the basis of the pulses. In the method, a pulse having the same phase as that of the asynchronous frame marker, another pulse having its phase delayed by 1/2 of one clock period and another pulse having its phase delayed by one clock period are generated to be suitably selected.
摘要翻译： PCT No.PCT / JP91 / 00248 Sec。 371日期1991年10月10日 102（e）日期1991年10月10日PCT 1991年2月26日PCT PCT。 WO91 / 13501 PCT出版物 1991年9月5日。本发明涉及一种数字移动无线电通信的帧同步方法，包括基于异步帧标记生成具有不同相位的多个脉冲，并且基于异步帧标记生成同步帧标记 脉冲。 在该方法中，产生具有与异步帧标记相同相位的脉冲，产生延迟了一个时钟周期的1/2的相位的另一个脉冲和其相位延迟了一个时钟周期的另一脉冲，以被适当地选择。
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公开(公告)号：US5960336A
公开(公告)日：1999-09-28
申请号：US851084
申请日：1997-05-06
CPC分类号： H04B7/0811
摘要： A data receiving apparatus is constructed to make comparison of received signal strength of a plurality of receiving antennas by making use of timing of a sync word, which is not necessary for making synchronization acquisition, among a plurality of sync words contained in a subframe of a receiving signal, and then to select a receiving antenna of the highest received signal strength from among the plurality of receiving antennas, in accordance with a result of the comparison made before then.
摘要翻译： 数据接收装置被构造成通过利用包含在一个子帧中的多个同步字中的同步字的定时来进行多个接收天线的接收信号强度的比较，该定时不是进行同步捕获 接收信号，然后根据之前的比较结果从多个接收天线中选择最高接收信号强度的接收天线。
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