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1. 发明授权

US5844907A Synchronization determining circuit, demodulator and communication system 失效
标题翻译：同步确定电路，解调器和通信系统
公开(公告)号：US5844907A
公开(公告)日：1998-12-01
申请号：US685746
申请日：1996-07-24
申请人： Tatsuya Uchiki , Toshiharu Kojima
发明人： Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H04L27/22 , H04J3/06 , H04L1/02 , H04L1/08 , H04L7/00 , H04L7/08
CPC分类号： H04J3/06
摘要： A synchronization determining method and circuit for determining a synchronization state of a multiplexed data stream derived by multiplexing a plurality of data streams having the same contents with a time lag provided therebetween, wherein the synchronization determining circuit establishes synchronization without decreasing transmission efficiency, generating incorrect code sequences, or increasing overall circuit scale. In each embodiment of the present invention, synchronization is established without using synchronization words. Because synchronization is achieved without feedback loop delay, incorrectly decoded sequences are not generated for a period of time before synchronization is established. Also, because no maximum pass metric state detecting circuit is required, circuit scale, power consumption, and operating speed can be improved.
摘要翻译：一种同步确定方法和电路，用于确定通过多路复用具有相同内容的多个数据流而产生的多路复用数据流的同步状态，其中同步确定电路在不降低传输效率的情况下建立同步而产生不正确的代码序列，或增加总体电路规模。在本发明的每个实施例中，在不使用同步字的情况下建立同步。由于在没有反馈环路延迟的情况下实现同步，因此在建立同步之前的一段时间内不会产生错误解码的序列。此外，由于不需要最大通过度量状态检测电路，因此可以提高电路规模，功耗和运行速度。

2. 发明授权

US06456672B1 Automatic frequency control communication system 失效
标题翻译：自动频率控制通信系统
公开(公告)号：US06456672B1
公开(公告)日：2002-09-24
申请号：US09066823
申请日：1998-04-28
申请人： Tatsuya Uchiki , Toshiharu Kojima , Hiroyasu Sano , Seiji Okubo , Makoto Miyake
发明人： Tatsuya Uchiki , Toshiharu Kojima , Hiroyasu Sano , Seiji Okubo , Makoto Miyake
IPC分类号： H04L2706
CPC分类号： H04L1/0059 , H03J7/02 , H04B7/06 , H04L1/0054 , H04L1/08 , H04L27/2332
摘要： In a communication system using the time diversity transmission scheme, the communication system provided with the stable automatic frequency control circuit with the wide frequency pull-in range and under low CN ratio transmission is achieved by removing the modulation phase from the received data through the application of the data correlation of the time diversity. The frequency offset in the received signal is compensated as the phase rotator rotates the phase of the received signal, the phase converter converts the phase rotator output into a phase, the serial-to-parallel converter converts the phase converter outputs into serial-to-parallel sequence, the delay units gives a delay to the serial-to-parallel converter output, the phase adder adds the serial-to-parallel converter output to the delay unit output, the multiplier multiplies the phase adder output by a certain value, the integrator integrates the multiplier output, another integrator integrates the integrator output, and the phase rotator controls the phase of the received signal based on the other integrator output.
摘要翻译：在使用时间分集传输方案的通信系统中，具有宽频率拉入范围和低CN比传输的稳定自动频率控制电路的通信系统通过从接收到的数据通过应用去除调制相位来实现的时间分集的数据相关性。接收信号中的频偏被补偿，因为相位旋转器接收信号的相位旋转，相位转换器将相位旋转器输出转换为相位，串并转换器将相位转换器输出转换为串 - 并联序列，延迟单元对串并转换器输出延时，相位加法器将串并转换器输出相加到延迟单元输出，乘法器将相位加法器输出乘以一定值，积分器积分乘法器输出，另一个积分器积分积分器输出，相位旋转器根据其他积分器输出控制接收信号的相位。

3. 发明授权

US5995520A Carrier slip compensation method for coherent detection 失效
标题翻译：用于相干检测的载波滑移补偿方法
公开(公告)号：US5995520A
公开(公告)日：1999-11-30
申请号：US775457
申请日：1996-12-30
申请人： Tatsuya Uchiki , Toshiharu Kojima
发明人： Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H04N5/455 , H04L27/18 , H04L27/22 , H04L27/227 , H04N7/00 , H04N19/00 , H04N19/102 , H04N19/134 , H04N19/196 , H04N19/42 , H04N19/423 , H04N19/467 , H04N19/65 , H04N19/70 , H04N19/85 , H04N19/89 , H04N19/895 , H04J3/06
CPC分类号： H04L27/22
摘要： In the communication system using the binary phase shift keying (BPSK) modulation method, an erroneous data that might be caused by a carrier slip of carrier wave generated during coherent detection can be compensated. The modulation unit of the transmitter transmits identical data at differentiated timing through BPSK modulation, and the coherent detector circuit of the demodulation unit of the receiver detects waves upon receiving signals. The compensating circuit makes time differences in transmitted data equal and compares them to detect mismatch in order to compensate carrier slip found in the received signal and then the combination circuit realizes the combination.
摘要翻译：在使用二进制相移键控（BPSK）调制方法的通信系统中，可以补偿由相干检测期间产生的载波的载波滑动引起的错误数据。发射机的调制单元通过BPSK调制在差分定时发送相同的数据，并且接收机的解调单元的相干检测电路在接收到信号时检测波。补偿电路使发送数据中的时差相等，并将它们进行比较以检测不匹配，以补偿在接收信号中发现的载波滑移，然后组合电路实现组合。

4. 发明授权

US06940892B2 Spread spectrum transmission apparatus, spread spectrum reception apparatus, and spread spectrum communication system 失效
标题翻译：扩频发射装置，扩频接收装置和扩频通信系统
公开(公告)号：US06940892B2
公开(公告)日：2005-09-06
申请号：US10096850
申请日：2002-03-14
申请人： Seiji Okubo , Tatsuya Uchiki , Toshiharu Kojima
发明人： Seiji Okubo , Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H04B1/707 , H04B1/7093 , H04B14/02 , H04J13/16 , H04B1/69
CPC分类号： H04B1/707 , H04B14/026
摘要： A spread spectrum transmission apparatus includes, a chip clock generation section which outputs a chip clock in one frame formed of M+L−1 chips, a frame clock generation section which outputs a frame clock synchronized to frame occurrence timing, SS-PPM signal generation sections each of which inserts a pseudonoise code sequence corresponding to one period from some of M chips located at a head of a frame based on K-bit transmission data and generates an SS-PPM signal, delay sections which respectively delay N SS-PPM signals respectively by determined delay quantities, and a multiplexing section which adds up all of outputs respectively of the delay units and generates a multiplexed SS-PPM signal.
摘要翻译：扩展频谱发送装置包括：芯片时钟生成部，其输出由M + L-1个码片构成的一帧中的码片时钟;帧时钟生成部，输出与帧发生定时同步的帧时钟; SS-PPM信号生成基于K位传输数据，每个插入一个对应于位于帧头部的M个芯片中的一个周期的伪噪声码序列，并产生分别延迟N个SS-PPM信号的SS-PPM信号分别通过确定的延迟量，以及多路复用部分，其分别相加所述延迟单元的所有输出并产生多路复用的SS-PPM信号。

5. 发明授权

US5659582A Receiver, automatic gain controller suitable for the receiver, control signal generator suitable for the automatic gain controller, reception power controller using the automatic gain controller and communication method using the receiver 失效
标题翻译：接收机，适用于接收机的自动增益控制器，适用于自动增益控制器的控制信号发生器，使用自动增益控制器的接收功率控制器和使用接收机的通信方式
公开(公告)号：US5659582A
公开(公告)日：1997-08-19
申请号：US394796
申请日：1995-02-27
申请人： Toshiharu Kojima , Tatsuya Uchiki
发明人： Toshiharu Kojima , Tatsuya Uchiki
IPC分类号： H04B1/26 , H03G3/00 , H03G3/30 , H04B1/16 , H04B1/40 , H04B1/06
CPC分类号： H03G3/3052 , H03G3/001
摘要： A receiver, an automatic gain controller suitable for the receiver, a control signal generator suitable for the automatic gain controller, a reception power controller using the automatic gain controller and a communication method using the receiver. The instantaneous power of a received signal output from a variable gain amplifier or attenuator is detected by a power detector. The detected instantaneous power is quantized by a comparator and filtered through a random walk filter. An up-down counter counts up or down in accordance with the increment signal or the decrement signal obtained by filtering. In this manner, error in the gain control of the variable gain amplifier or attenuator is obtained.
摘要翻译：适用于接收机的接收机，自动增益控制器，适用于自动增益控制器的控制信号发生器，使用自动增益控制器的接收功率控制器和使用接收机的通信方法。由可变增益放大器或衰减器输出的接收信号的瞬时功率由功率检测器检测。检测到的瞬时功率由比较器量化，并通过随机游走滤波器过滤。根据通过滤波获得的增量信号或减量信号，递增计数器向上或向下计数。以这种方式，可以获得可变增益放大器或衰减器的增益控制中的误差。

6. 发明授权

US07095778B2 Spread spectrum transmitter and spread spectrum receiver 失效
公开(公告)号：US07095778B2
公开(公告)日：2006-08-22
申请号：US10334947
申请日：2003-01-02
申请人： Seiji Okubo , Tatsuya Uchiki , Toshiharu Kojima
发明人： Seiji Okubo , Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H04B1/707
CPC分类号： H04B1/70752 , H04J13/0022
摘要： A spread spectrum transmitter provides delays having different magnitudes to spread spectrum (SS) signals for a plurality of channels, and multiplexes the SS signals to generate transmission multiplex SS signal. A spread spectrum receiver calculates a partial correlation value between the transmission multiplex SS signal and spreading codes multiplied to the SS signals, multiplies the partial correlation values by a prescribed matrix prepared based on each orthogonal code sequence to calculate a plurality of orthogonal correlation values. The receiver identifies for a respective channel each parallel data sequence related in advance to an orthogonal code sequence whose orthogonal correlation value is a maximum, corrects delay differences of the parallel data sequences, and then performs sampling and parallel-serial conversion to obtain a serial demodulated data sequence.

7. 发明授权

US06601213B1 Demodulator and communications system 失效
标题翻译：解调器和通信系统
公开(公告)号：US06601213B1
公开(公告)日：2003-07-29
申请号：US09549525
申请日：2000-04-14
申请人： Tatsuya Uchiki , Toshiharu Kojima
发明人： Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H04L102
CPC分类号： H04L1/0059 , H04L1/0041 , H04L1/0042 , H04L1/0054 , H04L1/02 , H04L1/08 , H04L2027/0048
摘要： A typical Viterbi decoder having a coherent detection function suffers from degraded performance under certain fading-induced phase shift conditions when used in a time diversity system. This problem is resolved by providing a demodulator for demodulating a data sequence multiplexed by multiplexing a plurality of data sequences of a same content with a time difference inserted therebetween for a time diversity system, which comprises: a phase correction unit 40 for phase correcting the multiplexed data sequence; a diversity combiner for demultiplexing the multiplexed data sequence output from the phase correction unit into a plurality of data sequences, removing the time difference inserted between data sequences, and combining the data sequences; and a Viterbi decoding unit for Viterbi decoding the diversity combined signal from the diversity combiner.
摘要翻译：具有相干检测功能的典型维特比解码器在用于时间分集系统的某些衰落诱发相移条件下遭受降级的性能。该解决方案通过提供一种解调器来解调通过多路复用多个数据序列的数据序列，该数据序列具有相同内容的时间差插入其间的时间分集系统，该时间分集系统包括：相位校正单元40，数据序列; 分集组合器，用于将从相位校正单元输出的多路复用数据序列解复用为多个数据序列，去除在数据序列之间插入的时差，并组合数据序列; 以及维特比解码单元，用于维特比解码来自分集组合器的分集合并信号。

8. 发明授权

US06473472B2 Adaptive array communication system and receiver 失效
标题翻译：自适应阵列通信系统和接收机
公开(公告)号：US06473472B2
公开(公告)日：2002-10-29
申请号：US09879032
申请日：2001-06-13
申请人： Tatsuya Uchiki , Toshiharu Kojima
发明人： Tatsuya Uchiki , Toshiharu Kojima
IPC分类号： H03M1312
CPC分类号： H04L1/0047 , H01Q3/2605 , H03M13/41 , H03M13/45 , H03M13/6325 , H03M13/6502 , H04B7/0851 , H04L1/0054 , H04L1/06
摘要： An adaptive array communication system includes an adaptive control unit (31) which performs a weighting process by multiplying received signals from a plurality of antennas by complex weights which are different from each other for respective states to combine the received signals, a decoding unit (34) which calculates a metric corresponding to a transition to a desired state, and an error vector calculation circuit (33) which calculates an error vector for calculating complex weights which are different from each other for the respective states.
摘要翻译：自适应阵列通信系统包括：自适应控制单元（31），其通过将来自多个天线的接收信号乘以彼此不同的复数来对各个状态进行加和处理，以组合接收的信号;解码单元（34）），其计算与期望状态的转换相对应的度量;以及误差向量计算电路（33），其计算用于计算各个状态彼此不同的复权重的误差向量。

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