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1. 发明授权

US5537396A Diffusion code generating method for spread spectrum communication 失效
标题翻译：用于扩频通信的扩散码生成方法
公开(公告)号：US5537396A
公开(公告)日：1996-07-16
申请号：US247937
申请日：1994-05-24
申请人： Tetsuo Kanda , Katsuo Saito , Toshihiko Myojo , Ichiro Kato , Norihiro Mochizuki , Hidetada Nago
发明人： Tetsuo Kanda , Katsuo Saito , Toshihiko Myojo , Ichiro Kato , Norihiro Mochizuki , Hidetada Nago
IPC分类号： H04J13/00 , H04B1/7075 , H04J13/02
CPC分类号： H04B1/707 , H04B1/709
摘要： A diffusion code generating method for a code division multiplex communication by a spread spectrum system is provided. A receiving apparatus according to the above method receives the signal which was multiplexed by using a plurality of sets of diffusion codes and comprises: a generator to generate a sync code and a plurality of sets of diffusion codes other than the sync code; a correlator to obtain a correlation between a reception signal and the sync code generated from the generator; and a receiver to receive the reception signal on the basis of the plurality of sets of diffusion codes generated from the generator. The generator generates the sync code in a manner such that the cross-correlation values are set to very small values at positions near a code sync point or are enough smaller than the autocorrelation peak of the sync code or are set to very small values at both of or either one of the positions before and after the code sync point.
摘要翻译：提供了一种扩频码生成方法，用于通过扩频系统进行码分复用通信。根据上述方法的接收装置接收通过使用多组扩散码复用的信号，并且包括：生成器，用于生成除同步码之外的同步码和多组扩散码; 相关器，用于获得从发生器产生的接收信号和同步码之间的相关性; 以及接收器，其基于从发电机产生的多组扩散码接收接收信号。发生器以这样的方式生成同步码，使得互相关值在码同步点附近的位置被设置为非常小的值，或者足够小于同步码的自相关峰值，或者被设置为非常小的值或者在代码同步点之前和之后的任一个位置。

2. 发明授权

US5793794A Spread spectrum receiving apparatus 失效
标题翻译：扩频接收装置
公开(公告)号：US5793794A
公开(公告)日：1998-08-11
申请号：US233244
申请日：1994-04-26
申请人： Ichiro Kato , Katsuo Saito , Toshihiko Myojo , Norihiro Mochizuki , Hidetada Nago , Tetsuo Kanda
发明人： Ichiro Kato , Katsuo Saito , Toshihiko Myojo , Norihiro Mochizuki , Hidetada Nago , Tetsuo Kanda
IPC分类号： H04B1/707 , H04B1/7075 , H04B1/7085 , H04J13/00 , H04B1/69
CPC分类号： H04B1/70712
摘要： A spread spectrum receiving apparatus comprises: a reproducing circuit to reproduce a carrier signal from a reception signal and a diffusion code; a demodulation circuit to demodulate the reception signal into a base band signal on the basis of the carrier signal reproduced by the reproducing circuit; and a judgment circuit to judge the reception data from the base band signal from the demodulation circuit. The reproducing circuit has an operation circuit to arithmetically operate the reception signal and the diffusion code and a detection circuit to detect a difference between the phases of an output of the operation circuit and an output of an oscillator. The oscillator oscillates at a carrier frequency in accordance with a phase difference detected by the detecting circuit.
摘要翻译：扩频接收装置包括：再现电路，用于从接收信号和扩散码再现载波信号; 解调电路，用于根据由再现电路再现的载波信号将接收信号解调为基带信号; 以及判断电路，用于根据来自解调电路的基带信号判断接收数据。再现电路具有运算电路，对接收信号和扩散码进行算术运算，检测电路检测运算电路的输出和振荡器的输出的相位差。振荡器根据由检测电路检测的相位差以载波频率振荡。

3. 发明授权

US5856997A Spread spectrum receiving apparatus 失效
公开(公告)号：US5856997A
公开(公告)日：1999-01-05
申请号：US546040
申请日：1995-10-20
申请人： Norihiro Mochizuki , Katsuo Saito , Akira Torisawa , Toshihiko Myojo , Ichiro Kato , Tetsuo Kanda , Atsushi Takasaki , Kazuo Moritomo , Rie Suzuki
发明人： Norihiro Mochizuki , Katsuo Saito , Akira Torisawa , Toshihiko Myojo , Ichiro Kato , Tetsuo Kanda , Atsushi Takasaki , Kazuo Moritomo , Rie Suzuki
IPC分类号： H04B1/7073 , H04J13/00 , H04B1/69
CPC分类号： H04B1/707
摘要： A receiving apparatus includes a base-band conversion circuit, a synchronizing circuit/code generator and a demodulator. The base-band conversion circuit converts a received signal into a base-band signal. The synchronizing circuit/code generator detects a spread code included in the received signal to generate a plurality of spread codes in synchronization with the spread code included in the received signal. The demodulator uses the plurality of spread codes supplied by the synchronizing circuit/code generator to demodulate the base-band signal.

4. 发明授权

US06459721B1 Spread spectrum receiving apparatus 失效
标题翻译：扩频接收装置
公开(公告)号：US06459721B1
公开(公告)日：2002-10-01
申请号：US09182004
申请日：1998-10-29
申请人： Norihiro Mochizuki , Katsuo Saito , Akira Torisawa , Toshihiko Myojo , Ichiro Kato , Tetsuo Kanda , Atsushi Takasaki , Kazuo Moritomo , Rie Suzuki
发明人： Norihiro Mochizuki , Katsuo Saito , Akira Torisawa , Toshihiko Myojo , Ichiro Kato , Tetsuo Kanda , Atsushi Takasaki , Kazuo Moritomo , Rie Suzuki
IPC分类号： H04B1500
CPC分类号： H04B1/707
摘要： A receiving apparatus includes a base-band conversion circuit, a synchronizing circuit/code generator and a demodulator. The base-band conversion circuit converts a received signal into a base-band signal. The synchronizing circuit/code generator detects a spread code included in the received signal to generate a plurality of spread codes in synchronization with the spread code included in the received signal. The demodulator uses the plurality of spread codes supplied by the synchronizing circuit/code generator to demodulate the base-band signal.
摘要翻译：接收装置包括基带转换电路，同步电路/码发生器和解调器。基带转换电路将接收的信号转换为基带信号。同步电路/码发生器检测包括在接收信号中的扩展码，以与包括在接收信号中的扩展码同步地产生多个扩展码。解调器使用由同步电路/码发生器提供的多个扩展码来解调基带信号。

5. 发明授权

US5374863A Surface acoustic wave device, and demodulation device and communication system using the same 失效
标题翻译：声表面波装置及其解调装置及通信系统
公开(公告)号：US5374863A
公开(公告)日：1994-12-20
申请号：US83432
申请日：1993-06-29
申请人： Norihiro Mochizuki , Hidetada Nago
发明人： Norihiro Mochizuki , Hidetada Nago
IPC分类号： H04J13/00 , H03H9/145 , H03H9/42 , H03H9/64 , H04B1/709 , H04L27/22 , H01L41/08
CPC分类号： H03H9/14561 , H03H9/6416 , H03H9/6486 , H03H9/14547
摘要： A surface acoustic wave device includes a piezoelectric substrate, an input electrode formed on the substrate and an output electrode formed on the substrate. A surface acoustic wave is generated from the input electrode to propagate in a predetermined direction in accordance with an input signal. In the output electrode, a plurality of taps are arranged in a propagation direction of the surface acoustic wave on the substrate. The surface acoustic wave is converted into an electrical signal by the output electrode. The taps of the output electrode are weighted so that signals output from the taps have substantially equal magnitudes.
摘要翻译：表面声波装置包括压电基板，形成在基板上的输入电极和形成在基板上的输出电极。从输入电极产生声表面波，根据输入信号沿预定方向传播。在输出电极中，在基板上的声表面波的传播方向上配置有多个抽头。表面声波由输出电极转换为电信号。输出电极的抽头被加权，使得从抽头输出的信号具有基本相等的幅度。

6. 发明授权

US5812592A Spread spectrum communication apparatus utilizing a phase difference between two signals 失效
标题翻译：扩频通信装置利用两个信号之间的相位差
公开(公告)号：US5812592A
公开(公告)日：1998-09-22
申请号：US569462
申请日：1995-12-08
申请人： Rie Suzuki , Toshihiko Myojo , Norihiro Mochizuki
发明人： Rie Suzuki , Toshihiko Myojo , Norihiro Mochizuki
IPC分类号： H04B1/707
CPC分类号： H04B1/7075 , H04B1/70712
摘要： A spread spectrum reception apparatus generates a local reference code and a timing signal having 1/2 the period of the reference code. Correlation calculation between a received spread spectrum signal and the local reference code is performed. Upon reception of the correlation calculation result, a peak detector detects a correlation peak signal. The rate of a code generation clock is adjusted in accordance with the phase difference between the timing signal and the correlation peak signal to perform de-spread processing of the received signal.
摘要翻译：扩展频谱接收装置产生参考码的周期的+ E，fra 1/2 + EE的本地参考码和定时信号。执行接收扩频信号和本地参考码之间的相关计算。在接收到相关计算结果之后，峰值检测器检测相关峰值信号。根据定时信号和相关峰值信号之间的相位差来调整代码生成时钟的速率，以执行接收信号的解扩处理。

7. 发明授权

US5917850A Spread spectrum receiving apparatus 失效
标题翻译：扩频接收装置
公开(公告)号：US5917850A
公开(公告)日：1999-06-29
申请号：US561278
申请日：1995-11-21
申请人： Takao Fujita , Toshihiko Myojo , Norihiro Mochizuki , Tadashi Eguchi , Rie Suzuki
发明人： Takao Fujita , Toshihiko Myojo , Norihiro Mochizuki , Tadashi Eguchi , Rie Suzuki
IPC分类号： H04B1/707 , H04B1/7075 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/7075 , H04B1/70712 , H04B2201/70707
摘要： A spread spectrum receiving apparatus is constructed by a generator for generating a reference clock, a phase shift circuit for shifting the phase of the reference clock generated by the generator in accordance with a code timing in a reception signal and the reference clock, and a de-spreading circuit for de-spreading the reception signal in accordance with the reference clock whose phase is shifted by the phase shift circuit. The de-spreading circuit generates a code for de-spreading in accordance with the phase shifted reference clock. The phase shift circuit has a calculator for calculating a phase shift amount so as to synchronize the code timing in the reception signal with the code for reception in accordance with a deviation between the code timing in the reception signal and the reference clock.
摘要翻译：扩频接收装置由用于产生参考时钟的发生器构成，相移电路用于根据接收信号和参考时钟中的码定时移位由发生器产生的参考时钟的相位，扩展电路，用于根据相移由相移电路的参考时钟来解扩接收信号。解扩电路根据相移参考时钟产生用于去扩展的码。相移电路具有用于计算相移量的计算器，以便根据接收信号中的码定时与参考时钟之间的偏差来同步接收信号中的码定时与接收码。

8. 发明授权

US06320842B1 Spread spectrum communication apparatus 失效
标题翻译：扩频通信装置
公开(公告)号：US06320842B1
公开(公告)日：2001-11-20
申请号：US08791418
申请日：1997-01-30
申请人： Norihiro Mochizuki
发明人： Norihiro Mochizuki
IPC分类号： H04B7216
CPC分类号： H04J13/0077 , H04B2201/70706 , H04J13/16
摘要： In a communication apparatus of the transmitting side, n number of parallel signals are respectively spread-modulated by the n number of spreading codes and summation thereof is obtained. Also, m number of parallel signals are respectively spread-modulated by the m number of spreading codes and summation thereof is obtained. These two signals are modulated with quadrature carriers, synthesized and transmitted to the receiving side.
摘要翻译：在发送侧的通信装置中，n个并行信号分别由n个扩展码扩展调制，得到其相加。此外，m个并行信号分别由m个扩展码扩展调制，并且获得其总和。这两个信号用正交载波调制，合成并发送到接收端。

9. 发明授权

US5661358A Demodulation apparatus and communication system using the same 失效
标题翻译：解调设备和通信系统使用相同
公开(公告)号：US5661358A
公开(公告)日：1997-08-26
申请号：US543255
申请日：1995-10-18
申请人： Norihiro Mochizuki
发明人： Norihiro Mochizuki
IPC分类号： H04J13/00 , H04B1/707 , H04B1/7093 , H01L41/08
CPC分类号： H04B1/70712
摘要： A demodulation apparatus and a communication system using the same are disclosed. The apparatus comprises code generation means for generating a reference spread code corresponding to a first signal modulated by a spread code, and an elastic surface wave element for receiving the first signal and a second signal output from the code generation means, and outputting a demodulated information signal. The elastic surface wave element comprises a piezoelectric substrate, a first excitation electrode, formed on the piezoelectric substrate, for generating a first elastic surface wave which propagates in a predetermined direction in accordance with the first signal, a second excitation electrode, formed on the piezoelectric substrate, for generating a second elastic surface wave which propagates in a direction opposite to the predetermined direction in accordance with the second signal, and an acousto-electric converter, formed between the first and second excitation electrodes on the piezoelectric substrate, for outputting a convolution signal of the first and second signals on the basis of the first and second elastic surface waves, wherein the acousto-electric converter selectively converts an elastic surface wave having a wave number twice a wave number of the first and second elastic surface waves into an electrical signal.
摘要翻译：公开了一种解调装置和使用该解调装置的通信系统。该装置包括用于产生对应于由扩展码调制的第一信号的参考扩展码的代码产生装置和用于接收第一信号的弹性表面波元件和从代码产生装置输出的第二信号，并输出解调信息信号。弹性表面波元件包括压电基片，形成在压电基片上的第一激励电极，用于产生根据第一信号在预定方向上传播的第一弹性表面波;形成在压电基片上的第二激励电极基板，用于产生沿着与第二信号相反的预定方向的方向传播的第二弹性表面波;以及声压电转换器，形成在压电基板上的第一和第二激励电极之间，用于输出卷积基于第一和第二弹性表面波的第一和第二信号的信号，其中声电转换器选择性地将具有第二和第二弹性表面波的波数的波数的两倍的弹性表面波转换成电信号。

10. 发明授权

US5353304A Surface acoustic wave device, and demodulating apparatus and communication system using the surface acoustic wave device 失效
标题翻译：表面声波装置，以及使用表面声波装置的解调装置和通信系统
公开(公告)号：US5353304A
公开(公告)日：1994-10-04
申请号：US183255
申请日：1994-01-19
申请人： Norihiro Mochizuki
发明人： Norihiro Mochizuki
IPC分类号： H03H9/145 , H03H9/64 , H04B1/707 , H01L41/04
CPC分类号： H03H9/6406 , H03H9/14502 , H04B1/70712
摘要： In a surface acoustic wave device, there are arranged a piezoelectric substrate, an input electrode and an output electrode. The input electrode is formed on the substrate, and generates a surface acoustic wave propagated in a predetermined direction, in accordance with an input signal. The output electrode is also formed on the substrate, and converts the surface acoustic wave to an electric signal. One of the input and output electrodes includes a plurality of taps equidistantly arranged in a propagation direction of the surface acoustic wave. The other one of the input and output electrodes may comprise a pair of taps arranged at a predetermined distance in the propagation direction. The electrode including a plurality of taps or the electrode including a pair of taps satifies a predetermined relation established among a length between the taps, a transmission speed of the input signal, a propagation velocity of the surface acoustic wave and so forth. According to such a structure, two bits of the signal can be processed without a delay circuit. A demodulating device and a communication system respectively include the surface acoustic wave device so that a circuit structure can be simplified and that data can be reproduced with a high signal quality.
摘要翻译：在表面声波装置中，设置有压电基板，输入电极和输出电极。输入电极形成在基板上，并且根据输入信号产生沿预定方向传播的表面声波。输出电极也形成在基板上，并将表面声波转换为电信号。输入和输出电极之一包括沿声表面波的传播方向等距布置的多个抽头。输入和输出电极中的另一个可以包括在传播方向上以预定距离布置的一对抽头。包括多个抽头的电极或包括一对抽头的电极饱和在抽头之间的长度，输入信号的传输速度，表面声波的传播速度等之间建立的预定关系。根据这样的结构，可以在没有延迟电路的情况下处理信号的两位。解调装置和通信系统分别包括表面声波装置，使得可以简化电路结构，并且可以以高信号质量再现数据。

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