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公开(公告)号：US5680421A
公开(公告)日：1997-10-21
申请号：US604832
申请日：1996-02-22
摘要： A frame synchronization apparatus is applied to the TDMA (Time Division Multiple Access) communication system, particularly, where a plurality of transmission rates are available. The frame synchronization apparatus calculates correlations between sampled sequences of a received signal and an assigned sync sequence during the longest or shortest frame period in the plurality of transmission rates. The apparatus stores positions where the correlations exceed a given threshold. Then, the apparatus sets a search gate at a position after a lapse of the longest or shortest frame period from each of those positions. The apparatus calculates correlations between the sync sequence and sampled sequences of the received signal for all the search gates. The actual transmission rate is determined from the plurality of transmission rates based on a time interval of positions where the correlations beyond a second threshold were detected. Synchronization is thus established.
摘要翻译： 帧同步装置被应用于TDMA（时分多址）通信系统，特别是在多个传输速率可用的情况下。 帧同步装置在多个传输速率的最长或最短帧周期期间，计算接收信号的采样序列与分配的同步序列之间的相关性。 该装置存储相关性超过给定阈值的位置。 然后，该设备在从这些位置中的每个位置经过最长或最短帧周期之后的位置处设置搜索门。 该装置计算所有搜索门的同步序列和接收信号的采样序列之间的相关性。 基于检测到超过第二阈值的相关性的位置的时间间隔，从多个传输速率确定实际传输速率。 因此建立同步。
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2.发明授权公开(公告)号：US07530001B2
公开(公告)日：2009-05-05
申请号：US11328256
申请日：2006-01-10
申请人： Toshimichi Naoi
发明人： Toshimichi Naoi
IPC分类号： G08C25/02
CPC分类号： H04L1/188 , H04L2001/125
摘要： Packet data consist of preamble information, header information, transmitting information and an error detection code arranged in the order are generated to be transmitted to wireless communications apparatus. When data transmitted from the wireless communications apparatus are received, it is determined whether or not a correlation value of the received data with predetermined preamble information is equal to or larger than a predetermined threshold. When the correlation value is equal to or larger than the threshold, then it is determined whether or not there are next header information and transmitting information to be transmitted. Finally, next packet data based on the next header information and transmitting information are transmitted. Packet data will not be retransmitted even when bit error exists in a response signal, thus making it possible to improve the transmission efficiency.
摘要翻译： 分组数据由前导码信息，报头信息，发送信息和按顺序排列的检错码生成，以发送到无线通信装置。 当接收到从无线通信装置发送的数据时，确定接收到的数据与预定前导码信息的相关值是否等于或大于预定阈值。 当相关值等于或大于阈值时，确定是否存在下一个标题信息和发送要发送的信息。 最后，发送基于下一个报头信息和发送信息的下一个分组数据。 即使在响应信号中存在位错误的情况下，也不会重发分组数据，从而可以提高传输效率。
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公开(公告)号：US20080098276A1
公开(公告)日：2008-04-24
申请号：US11848307
申请日：2007-08-31
申请人： Toshimichi Naoi
发明人： Toshimichi Naoi
IPC分类号： H03M13/00
CPC分类号： H04L1/1819 , H03M13/09
摘要： The present invention provides a data transmission method capable of suppressing degradation in data rate while improving a bit error rate of transmission data, and transmitters and receivers employed in the data transmission method. On the transmitting side, a CRC bit is added to an input information bit sequence in block units. The information bit sequence subsequent to the addition of the CRC bit is modulated and transmitted to the receiving side. On the receiving side, the information bit sequence is received and demodulated. A CRC check for the post-demodulation information bit sequence is performed. When the above result of CRC check is found to be negative-acknowledged, a NACK signal is transmitted to the transmitting side. On the transmitting side, when the NACK signal transmitted from the receiving side is received after modulation/transmission of the information bit sequence, the information bit sequence subsequent to the addition of the CRC bit is systematically encoded to generate a first parity bit sequence. The first parity bit sequence is modulated and transmitted to the receiving side. On the receiving side, the first parity bit sequence is received and demodulated. The post-demodulation information bit sequence is subjected to error correction decoding using the demodulated first parity bit sequence.
摘要翻译： 本发明提供一种数据传输方法，能够抑制数据速率的劣化，同时提高传输数据的误比特率，以及在数据传输方法中使用的发射机和接收机。 在发送侧，以块为单位将CRC位添加到输入信息位序列。 加入CRC位之后的信息位序列被调制并发送到接收端。 在接收侧，信息比特序列被接收和解调。 执行后解调信息比特序列的CRC校验。 当发现CRC校验的上述结果为否定确认时，向发送侧发送NACK信号。 在发送侧，当在信息比特序列的调制/发送之后接收到从接收侧发送的NACK信号时，在加法CRC比特之后的信息比特序列被系统地编码以产生第一奇偶校验位序列。 第一奇偶校验位序列被调制并发送到接收侧。 在接收侧，接收并解调第一奇偶校验位序列。 后解调信息比特序列使用解调的第一奇偶校验位序列进行纠错解码。
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4.发明授权Error correcting device and method thereof that turbo-decodes only if an error is detected in the received data 失效纠错装置及其方法，只有在接收到的数据中检测到错误时进行turbo解码公开(公告)号：US07293219B2
公开(公告)日：2007-11-06
申请号：US10460212
申请日：2003-06-13
申请人： Toshimichi Naoi
发明人： Toshimichi Naoi
IPC分类号： H03M13/00
CPC分类号： H03M13/2975 , H03M13/09 , H03M13/29 , H03M13/3707
摘要： A method for extracting an information sequence from transmitted data, includes receiving the transmitted data, rearranging the order of the received data, extracting a block coding sequence from the rearranged received data, detecting whether an error exists in the extracted block coding sequence, and decoding the extracted block coding sequence using block decoding to obtain the information sequence if no error is detected in the extracted block coding sequence.
摘要翻译： 一种用于从发送数据中提取信息序列的方法，包括接收发送数据，重新排列接收数据的顺序，从重新排列的接收数据中提取块编码序列，检测提取的块编码序列中是否存在错误，以及解码 所提取的块编码序列使用块解码来获得所述信息序列，如果在所提取的块编码序列中没有检测到错误。
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5.发明授权Method of apparatus for automatic gain control, and digital receiver using same 失效用于自动增益控制的装置的方法和使用它的数字接收机
公开(公告)号：US5946607A
公开(公告)日：1999-08-31
申请号：US828714
申请日：1997-03-28
CPC分类号： H03G3/3052
摘要： An analog input signal is fed to an amplifier having a gain level that is determined by a gain control signal, and the amplified input signal is then converted into a digital received signal. A direct-current offset is detected from the digital received signal. The gain control signal is generated based in part on the direct-current offset.
摘要翻译： 模拟输入信号被馈送到具有由增益控制信号确定的增益电平的放大器，然后将放大的输入信号转换成数字接收信号。 从数字接收信号检测直流偏移。 增益控制信号部分地基于直流偏移产生。
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公开(公告)号：US20060156203A1
公开(公告)日：2006-07-13
申请号：US11328256
申请日：2006-01-10
申请人： Toshimichi Naoi
发明人： Toshimichi Naoi
IPC分类号： H03M13/00
CPC分类号： H04L1/188 , H04L2001/125
摘要： Packet data consist of preamble information, header information, transmitting information and an error detection code arranged in the order are generated to be transmitted to wireless communications apparatus. When data transmitted from the wireless communications apparatus are received, it is determined whether or not a correlation value of the received data with predetermined preamble information is equal to or larger than a predetermined threshold. When the correlation value is equal to or larger than the threshold, then it is determined whether or not there are next header information and transmitting information to be transmitted. Finally, next packet data based on the next header information and transmitting information are transmitted. Packet data will not be retransmitted even when bit error exists in a response signal, thus making it possible to improve the transmission efficiency.
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公开(公告)号：US5751776A
公开(公告)日：1998-05-12
申请号：US736767
申请日：1996-10-25
IPC分类号： H04L7/04 , H04L27/00 , H04L27/227 , H04L7/02
CPC分类号： H04L27/2273 , H04L2027/0028 , H04L2027/0067 , H04L2027/0069 , H04L7/042
摘要： A receiver to be employed in a digital mobile communication system, more particularly to a receiver for performing complex correlation against a received signal so as to establish and supervise the synchronization with the received signal. The receiver estimates a transmission channel between sending and receiving stations using the received signal and a predetermined reference signal (S11). The phase of the received signal is compensated for using the estimated phase error resulting from the estimation (S12). Complex correlation of the received signal which is compensated for in phase is performed against the reference signal (S13) to obtain a correlation value. The correlation value is compared with a predetermined threshold value (S14). The presence or absence of synchronization between the sending and receiving stations can be detected based on the result of the comparison. In case of detecting synchronization again after the synchronization is once detected, the phase of the received signal is compensated for (S22) using a previously obtained phase variation amount whereby the complex correlation value can be obtained (S23).
摘要翻译： 一种在数字移动通信系统中使用的接收机，更具体地涉及一种用于对接收到的信号执行复杂相关以便建立并监督与接收信号的同步的接收机。 接收机使用接收到的信号和预定的参考信号来估计发送站和接收站之间的传输信道（S11）。 使用由估计得到的估计相位误差补偿接收信号的相位（S12）。 对参考信号（S13）进行相位补偿的接收信号的复相关，得到相关值。 将相关值与预定阈值进行比较（S14）。 可以基于比较的结果来检测发送站和接收站之间是否存在同步。 在一旦检测到同步之后再次检测同步的情况下，使用先前获得的相位变化量补偿接收信号的相位（S22），由此可以获得复相关值（S23）。
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公开(公告)号：US5479419A
公开(公告)日：1995-12-26
申请号：US266771
申请日：1994-06-28
申请人： Toshimichi Naoi , Haruhiro Shiino , Yasuo Shoji
发明人： Toshimichi Naoi , Haruhiro Shiino , Yasuo Shoji
CPC分类号： H04L25/03197
摘要： An adaptive maximum likelihood sequence estimator includes a channel estimator and a Viterbi algorithm processor for estimating the maximum likelihood transmission symbol sequences. The algorithm processor includes a branch metric computer in which common components are found from regularity in computations of coded alphabets of the transmission symbols and are used for all branch metric computation to reduce the total amount of the operations. Such effective computations are implemented by either of hardware and software in accordance with the constitution of the system of the adaptive maximum likelihood sequence estimator.
摘要翻译： 自适应最大似然序列估计器包括用于估计最大似然传输符号序列的信道估计器和维特比算法处理器。 算法处理器包括分支度量计算机，其中在计算传输符号的编码字母中的规则性中找到公共组件，并且用于所有分支度量计算以减少操作的总量。 根据自适应最大似然序列估计器系统的结构，这种有效计算由硬件和软件之一来实现。
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9.发明授权Maximum likelihood sequence estimator and maximum likelihood sequence estimating method 失效最大似然序列估计和最大似然序列估计方法
公开(公告)号：US5867531A
公开(公告)日：1999-02-02
申请号：US604833
申请日：1996-02-22
IPC分类号： H03H21/00 , H03M13/23 , H03M13/41 , H04B3/04 , H04B7/005 , H04L1/00 , H04L25/03 , H04L25/08 , H04L5/12
CPC分类号： H03M13/6331 , H03M13/41 , H04L1/0054 , H04L25/03318
摘要： When a maximum likelihood sequence estimator according to the present invention is used as an equalizer or the like for a receiver, a Viterbi algorithm processing portion 331 in the maximum likelihood sequence estimator estimates a transmission symbol Ea.sub.n with a reception signal y.sub.n and an estimated impulse response {Eh.sub.k } corresponding to Viterbi algorithm so as to estimate a maximum likelihood sequence corresponding to a soft decision regardless of a modulating method. A transmission logic code decoder 34 converts a transmission symbol Ea.sub.n into hard decision data Eb.sub.m with a value "1" or "0". An envelope detector 333 that is a transmission line quality evaluating means detects an envelope level p.sub.n of the reception signal y.sub.n. A soft decision value converting portion 334 converts the envelope level p.sub.n received from the envelope detector 333 corresponding to the value "1" or "0" of the hard decision data Ebm received from the transmission logic code decoder 34 so as to obtain soft decision value output data q.sub.m.
摘要翻译： 当根据本发明的最大似然序列估计器用作接收机的均衡器等时，最大似然序列估计器中的维特比算法处理部分331用接收信号yn和估计的脉冲响应来估计发送符号Ean {Ehk}对应于维特比算法，以便估计与软决策相对应的最大似然序列，而不管调制方法如何。 传输逻辑代码解码器34将传输符号Ean转换成具有值“1”或“0”的硬判决数据Ebm。 作为传输线质量评估装置的包络检测器333检测接收信号yn的包络电平pn。 软决策值转换部分334将从包络检测器333接收到的包络电平pnn对应于从传输逻辑码解码器34接收的硬判决数据Ebm的值“1”或“0”转换，以获得软判决值 输出数据qm。
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公开(公告)号：US5602881A
公开(公告)日：1997-02-11
申请号：US167967
申请日：1993-12-21
IPC分类号： H04L7/04 , H04L27/00 , H04L27/227 , H04L7/02
CPC分类号： H04L27/2273 , H04L2027/0028 , H04L2027/0067 , H04L2027/0069 , H04L7/042
摘要： A receiver to be employed in a digital mobile communication system, more particularly to a receiver for performing complex correlation against a received signal so as to establish and supervise the synchronization with the received signal. The receiver estimates a transmission channel between sending and receiving stations using the received signal and a predetermined reference signal (S11). The phase of the received signal is compensated for using the estimated phase error resulting from the estimation (S12). Complex correlation of the received signal which is compensated for in phase is performed against the reference signal (S13) to obtain a correlation value. The correlation value is compared with a predetermined threshold value (S14). The presence or absence of the synchronization between the sending and receiving stations can be detected, based on the result of the comparison. In case of detecting synchronization again after the synchronization is once detected, the phase of the received signal is compensated for (S22) using a previously obtained phase variation amount whereby the complex correlation value can be obtained (S23).
摘要翻译： PCT No.PCT / JP93 / 00510 Sec。 371日期：1993年12月21日 102（e）日期1993年12月21日PCT 1993年4月20日PCT PCT。 公开号WO93 / 22861 日期：11月11日，11日在数字移动通信系统中使用的接收机，更具体地说，涉及一种对接收到的信号进行复杂相关的接收机，以建立并监督与接收信号的同步。 接收机使用接收到的信号和预定的参考信号来估计发送站和接收站之间的传输信道（S11）。 使用由估计得到的估计相位误差补偿接收信号的相位（S12）。 对参考信号（S13）进行相位补偿的接收信号的复相关，得到相关值。 将相关值与预定阈值进行比较（S14）。 可以基于比较的结果来检测发送站和接收站之间是否存在同步。 在一旦检测到同步之后再次检测同步的情况下，使用先前获得的相位变化量来补偿接收信号的相位（S22），从而可以获得复相关值（S23）。
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