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1. 发明申请

WO1997033400A1 SIGNAL TRANSMITTING METHOD, TRANSMITTER, RECEIVER, AND SPREAD-SPECTRUM CODE SYNCHRONIZING METHOD FOR MOBILE COMMUNICATION SYSTEM 审中-公开
标题翻译：信号传输方法，发射机，接收机和用于移动通信系统的传播频谱同步方法
公开(公告)号：WO1997033400A1
公开(公告)日：1997-09-12
申请号：PCT/JP1997000657
申请日：1997-03-04
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , HIGUCHI, Kenichi , SAWAHASHI, Mamoru , ADACHI, Fumiyuki , OHNO, Koji , HIGASHI, Akihiro
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04J13/00
CPC分类号： H04B1/70756 , H04B1/70755 , H04B1/708 , H04B1/7083 , H04B2201/70702 , H04J13/16 , H04J2013/0037
摘要： The spread-spectrum code synchronizing speed of a down control channel is improved. The spectra of a control channel information signal and each communication channel information signal are spread by using different first spread-spectrum codes having the repetitive periods of information symbol periods from each first spread-spectrum code (short code) generating section (11). Then only the spectrum of the control channel information signal is spread by using third spread-spectrum codes which are complex conjugation of a common long code (second spread-spectrum code) to be spread from a third spread-spectrum code (complex conjugate code of a long code mask section) generating section (12). Thereafter, the signals of all channels are added at an adequate timing by an adder (13), the spectrum of the output of the adder (B) is spread by using second spread-spectrum codes from a second spread-spectrum code generating section (14), and the spread-spectrum signal is outputted as a spread modulated signal.
摘要翻译：改善了下行控制信道的扩频码同步速度。通过使用具有来自每个第一扩频码（短码）产生部分（11））的具有信息符号周期的重复周期的不同的第一扩频码，扩展控制信道信息信号和每个通信信道信息信号的频谱。那么只有控制信道信息信号的频谱通过使用第三扩频码来扩展，第三扩频码是从第三扩频码（第二扩频码）的复共轭长码掩码部分）生成部分（12）。此后，通过加法器（13）在适当的定时添加所有信道的信号，加法器（B）的输出的频谱通过使用来自第二扩频码生成部分的第二扩频码 14），扩频信号作为扩展调制信号输出。

2. 发明申请

WO1996038999A1 CDMA MOBILE COMMUNICATION METHOD, SYSTEM, AND MOBILE STATION EQUIPMENT 审中-公开
标题翻译： CDMA移动通信方法，系统和移动站设备
公开(公告)号：WO1996038999A1
公开(公告)日：1996-12-05
申请号：PCT/JP1996001460
申请日：1996-05-30
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04Q07/38
CPC分类号： H04W36/18 , H04B7/2621 , H04B7/2628 , H04B7/2643 , H04L1/0041 , H04L1/0042 , H04L1/0045 , H04L1/0048 , H04W36/30
摘要： A CDMA mobile communication system which creates the time during which peripheral base stations using different radio frequencies and executes the hand-off between base stations using different radio frequencies without momentary interruption. A mobile station (504) of the CDMA mobile communication system suspends the error correcting and decoding processing of received signals, outputs user data which are not subjected to the error correcting and decoding processing, and, during this suspending time, monitors the receiving levels of the peripheral base stations by switching the receiving frequency to the radio frequencies of the base stations. The base station (502) now in contact and the next base station (503) transmit only the user data during the hand-off period from the base station (502) to the next base station (503) using different frequencies and do not transmit transmission signals during the transmitting period of an error correcting and encoding check bit. The mobile station (504) receives and demodulates signals transmitted from the base station (502) and, during the transmitting period of the error correcting and encoding check bit, receives and demodulates signals transmitted from the next base station (503) by switching the frequency of its receiver to that of the next base station (503).
摘要翻译： CDMA移动通信系统，其创建使用不同射频的外围基站的时间，并且在使用不同射频的基站之间执行切换，而不会立即中断。 CDMA移动通信系统的移动站（504）暂停接收信号的纠错和解码处理，输出不经过纠错和解码处理的用户数据，并且在该暂停时间期间监视接收信号的接收电平外围基站通过将接收频率切换到基站的射频。现在接触的基站（502）和下一个基站（503）在切换期间仅使用不同频率从基站（502）到下一个基站（503）的用户数据，并且不发送在错误校正和编码校验位的发送期间的发送信号。移动站（504）接收并解调从基站（502）发送的信号，并且在错误校正和编码校验位的发送周期期间，通过切换频率来接收和解调从下一个基站（503）发送的信号的接收机到下一个基站（503）的接收机。

3. 发明申请

WO1996026582A1 VARIABLE RATE TRANSMITTING METHOD, AND TRANSMITTER AND RECEIVER USING IT 审中-公开
标题翻译：可变速率传输方法，使用它的发射机和接收机
公开(公告)号：WO1996026582A1
公开(公告)日：1996-08-29
申请号：PCT/JP1996000419
申请日：1996-02-23
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , OKUMURA, Yukihiko , ADACHI, Fumiyuki , OHNO, Koji , HIGASHI, Akihiro
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04J13/04
CPC分类号： H04L1/0046 , H04B1/707 , H04B7/2628 , H04B2201/70703 , H04B2201/70705 , H04J3/14 , H04J3/1682 , H04L1/0002 , H04L1/0007 , H04L1/0009 , H04L1/0013 , H04L1/0025 , H04L1/0032 , H04L1/0038 , H04L1/0039 , H04L1/0059 , H04L1/0061 , H04L1/0063 , H04L1/0071 , H04L1/0079 , H04L1/0086 , H04L1/08 , H04L7/048 , H04L2001/0098 , Y02D50/10
摘要： A variable rate transmitting method in which the data transmission rate can be changed freely. The transmitting side supplies a transmission data sequence to an error detection encoding circuit (105) and a frame memory (103). The frame memory (103) holds variable-length data which are transmitted in frames. The error detection encoding circuit (105) calculates error detecting codes (for example, CRC codes for every frame of the transmission data). A multiplexing circuit (104) adds the calculated error detecting codes to the frame immediately before the transmission data, namely, at the head of the frame, and successively outputs data sequences one frame by one frame. On the receiving side, the error detecting codes of the data in the transmitted frame are calculated in the same way as that on the transmitting side and the calculated error detecting codes are compared with the error detecting codes at the head of the frame. The position where both error detecting codes coincide with each other is determined to be the last bit of the data in the frame. Therefore, variable-length data can be transmitted without informing the receiving side of the data length of each frame. This is equivalent to the case where the transmission rate can be freely changed.
摘要翻译：一种可以自由改变数据传输速率的可变速率传输方法。发送侧向错误检测编码电路（105）和帧存储器（103）提供发送数据序列。帧存储器（103）保存以帧发送的可变长度数据。误差检测编码电路（105）计算错误检测码（例如，发送数据的每帧的CRC码）。多路复用电路（104）将计算出的错误检测码添加到发送数据之前的帧即帧的头部，并逐帧地输出数据序列。在接收侧，以与发送侧相同的方式计算发送帧中的数据的错误检测码，并将计算出的错误检测码与帧头部的错误检测码进行比较。两个错误检测码彼此一致的位置被确定为帧中数据的最后一位。因此，可以发送可变长度数据而不通知接收侧每帧的数据长度。这相当于传输速率可以自由改变的情况。

4. 发明申请

WO1996000475A1 MAXIMUM LIKELIHOOD DECODING AND SYNCHRONOUS DETECTING METHOD 审中-公开
标题翻译：最大LIKELIHOOD解码和同步检测方法
公开(公告)号：WO1996000475A1
公开(公告)日：1996-01-04
申请号：PCT/JP1995001262
申请日：1995-06-23
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04L27/22
CPC分类号： H04L25/03184 , H04L1/005 , H04L1/0054 , H04L27/22 , H04L2025/03401
摘要： Received signal sample sequence is reversely modulated with a symbol sequence representing the Trellis state once before and summed to generate a reference signal. Using the reference signal and the inner product of the received signal sample at the present time and the candidate symbol phase as the branch metric, sequence estimation is performed according to a Viterbi algorithm.
摘要翻译：接收信号采样序列用代表网格状态的符号序列反向调制一次，并相加以生成参考信号。使用参考信号和当前接收信号样本的内积和候选符号相位作为分支度量，根据维特比算法执行序列估计。

5. 发明申请

WO1995035615A1 SYNCHRONOUS DETECTOR AND SYNCHRONIZING METHOD FOR DIGITAL COMMUNICATION RECEIVER 审中-公开
标题翻译：用于数字通信接收机的同步检测器和同步方法
公开(公告)号：WO1995035615A1
公开(公告)日：1995-12-28
申请号：PCT/JP1995001229
申请日：1995-06-21
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , HIGASHI, Akihiro , ADACHI, Fumiyuki , OHNO, Koji , SAWAHASHI, Mamoru
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04L27/22
CPC分类号： H04L25/0236 , H04L7/08 , H04L25/0212 , H04L25/0232
摘要： A synchronous detecting method in which the transfer function of a propagation path is estimated by regarding the information symbols adjacent to pilot signals as known symbols and using the information symbols as pseudo-pilot signals. The method includes a step of estimating the transfer function by using the pilot signals, a step of performing interpolation synchronous detection of part of the information symbols by using the estimated transfer function, a step of storing the result of the interpolation synchronous detection as pseudo-pilot signals, a step of reestimating the transfer function related to information symbols corresponding to the pseudo-pilot signals from the pseudo-pilot signals and the received signals corresponding to the pseudo-pilot signal, regarding the pseudo-pilots as known correct signals, and a step of performing interpolation synchronous detection of each information symbol by using the reestimated transfer function. Thus, the detection characteristic can be improved by estimating the transfer function with high accuracy even when the number of symbols per pilot signal is small.
摘要翻译：一种同步检测方法，其中通过将与导频信号相邻的信息符号作为已知符号并且将信息符号用作伪导频信号来估计传播路径的传递函数。该方法包括通过使用导频信号估计传递函数的步骤，使用估计的传递函数对信息符号的一部分进行内插同步检测的步骤，将插值同步检测的结果存储为伪随机数的步骤，导频信号;关于作为已知正确信号的伪导频，将来自伪导频信号的对应于伪导频信号的信息符号的传输函数和对应于伪导频信号的接收信号重新设定为步骤，以及通过使用再估计传递函数对每个信息符号执行插值同步检测的步骤。因此，即使每个导频信号的符号数量少，也可以通过高精度地估计传递函数来提高检测特性。

6. 发明申请

WO1991003110A1 WIRELESS CHANNEL SWITCH CONTROL METHOD 审中-公开
标题翻译：无线信道切换控制方法
公开(公告)号：WO1991003110A1
公开(公告)日：1991-03-07
申请号：PCT/JP1990001076
申请日：1990-08-24
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION , MAEBARA, Akihiro , ONOE, Seizo , ADACHI, Fumiyuki , HATA, Masaharu , FUJII, Toshinori
发明人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
IPC分类号： H04B07/26
CPC分类号： H04W36/18 , H04W56/00
摘要： A wireless channel switch control method in a digital mobile communication system using TDMA, wherein a mobile station stores the synchronizing condition in a switching channel, switches into a designated channel to be switched, and effects pulling for a predetermined period of time to store the synchronizing condition. The communication is effected by returning the channel to the synchronizing condition in the switching channel that is stored, the synchronizing condition is set again that corresponds to the channel to be switched that is stored, and the pulling operation is carried out, repetitively, in order to establish synchronism relative to the channel to be switched. The communication is continued by the switching channel until synchronism is established by the channel to be switched and the communication is made possible. Thus, the wireless channel is switched without causing any interrupt in the speech signals. Common reference clocks are given to a plurality of wireless devices within a base station, and each wireless device is provided with a reception synchronizing condition parameter in any slot of an allotted frequency channel. When it is judged that the channel should be switched, the reception synchronizing condition parameter in the switching channel is set to the wireless device that is to be switched so that it readily starts receiving the signals under the same reception synchronizing condition as that of the switching channel.

7. 发明申请

WO1997050219A1 DATA TRANSMITTING METHOD, DATA TRANSMITTING SYSTEM, TRANSMITTER, AND RECEIVER 审中-公开
标题翻译：数据传输方法，数据传输系统，发射机和接收机
公开(公告)号：WO1997050219A1
公开(公告)日：1997-12-31
申请号：PCT/JP1997002145
申请日：1997-06-23
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , OKUMURA, Yukihiko , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04L29/02
CPC分类号： H03M13/00 , H03M13/09 , H03M13/3738 , H03M13/41 , H04L1/0002 , H04L1/0006 , H04L1/0025 , H04L1/0046 , H04L1/0054 , H04L1/0061 , H04L1/0065 , H04L1/0071 , H04L1/0083
摘要： A data transmitting method by which high-quality variable-rate data transmission can be realized by executing rate discrimination more surely, a data transmitting system, a transmitter, and a receiver. In the variable-rate transmitting method in which variable-length transmitting data are transmitted by housing the data in frames each having a fixed time length, the transmission side transmits user data by adding an error detecting code to the data and the reception side performs viterbi decoding up to the final bit position of transmittable frame data by successively assuming the final bit position. When the difference between the maximum likelihood of a plurality of candidate decoded data sequences and the likelihood of a decoded data sequence obtained by terminating a decoding process falls within a fixed range and it is confirmed that a calculated detecting code coincides with a received error detecting code by comparison, transmitted data are decoded by discriminating that the assumed final bit position is the final bit position of the transmitted frame data.
摘要翻译：一种数据发送方法，可以通过更可靠地执行速率鉴别来实现高质量可变速率数据传输，数据传输系统，发射机和接收机。在通过以具有固定时间长度的帧容纳数据来发送可变长度发送数据的可变速率发送方法中，发送侧通过向数据添加错误检测码来发送用户数据，并且接收侧执行维特比通过连续地假设最终比特位置来解码直到可发送帧数据的最终比特位置。当多个候选解码数据序列的最大似然度与通过终止解码处理而获得的解码数据序列的可能性之间的差落在固定范围内时，确认计算出的检测码与接收到的检错码一致通过比较，通过区分所假定的最终比特位置是发送的帧数据的最终比特位置来解码发送的数据。

8. 发明申请

WO1996021294A1 DEVICE AND METHOD FOR COHERENT-TRACKING OF CDMA RECEIVER 审中-公开
标题翻译：用于CDMA接收机的相关跟踪的设备和方法
公开(公告)号：WO1996021294A1
公开(公告)日：1996-07-11
申请号：PCT/JP1996000006
申请日：1996-01-05
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , SAWAHASHI, Mamoru , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04J13/00
CPC分类号： H04B1/7085 , H04B1/709
摘要： A coherent-tracking device of a CDMA receiver, which performs coherent tracking with high accuracy and with low noise. The tracking device is provided with a demodulation coherent detector which performs coherent detection by multiplying a received spread-spectrum signal by a demodulated spreading code replica whose phase is synchronized with the received spreading code contained in the received spread-spectrum signal, an absolute synchronous detector which performs absolute synchronous detection of the coherent signal (compressed-back signals) from the demodulation coherent detector and demodulates information data, a tracking coherent detector which performs coherent detection by multiplying the received spread-spectrum signal by a pair of tracking spread-spectrum code replicas having phases shifted from the phase of the demodulated spreading code replica by +/-1/2-chip period, a judgement code correcting circuit which reversely modulates the output difference (phase error signal) of the tracking coherent detector with the output of the absolute synchronous detector to remove the information data modulated components contained in the error signal, and a spreading code replica generator which generates a demodulated spreading code replica and a tracking spreading code replica while controlling the phase by using the error signal outputted from the correcting circuit.
摘要翻译： CDMA接收机的相干跟踪装置，以高精度和低噪声进行相干跟踪。跟踪装置设置有解调相干检测器，其通过将接收的扩频信号乘以相位与接收的扩频信号中包含的接收的扩展码同步的解调的扩展码副本来执行相干检测，绝对同步检测器其执行来自解调相干检测器的相干信号（压缩信号）的绝对同步检测，并对信息数据进行解调，跟踪相干检测器，通过将接收的扩频信号乘以一对跟踪扩频码具有从解调的扩展码副本的相位偏离+/- 1/2码片周期的相位的副本，判断码校正电路，用于将跟踪相干检测器的输出差（相位误差信号）与绝对同步检测器去除信息数据模块包含在误差信号中的分量分量，以及扩展码复制产生器，其通过使用从校正电路输出的误差信号来控制相位，生成解调扩展码副本和跟踪扩展码副本。

9. 发明申请

WO1996005680A1 DPSK WAVE LINEAR PREDICTION DELAY DETECTION METHOD 审中-公开
标题翻译： DPSK波形线性预测延迟检测方法
公开(公告)号：WO1996005680A1
公开(公告)日：1996-02-22
申请号：PCT/JP1995001517
申请日：1995-08-01
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04L27/22
CPC分类号： H04L25/03184 , H04L2025/03375
摘要： In a reference signal adaptation estimation portion (15), the phase of a reception signal sample Zn-2 at a time point (n-2) is rotated by M states DELTA On-1 at a time point (n-1), and this value and Zn-2 are used to determine a linear predictor of the reception sample at the time point (n-1) inclusive of fading fluctuation at the time point n in accordance with the following equation: zn-1 + (1+ lambda )zn-1 - lambda zn-2exp(j DELTA On-1). A square error between the value obtained by rotating the phase of this zn-1 by DELTA On and zn is determined as a branch metric at a branch metric calculation portion (16), and is decoded by a Viterbi algorithm at a Viterbi decoding portion (17) by using this branch metric. A prediction coefficient is sequentially determined by an error minimization algorithm so that a weighted square sum of the error between a reception signal sample at each time point retrospective of each pass and the predictor, after survival passes reaching the M state DELTA On at the time point n are determined.
摘要翻译：在参考信号适配估计部分（15）中，时间点（n-2）处的接收信号样本Zn-2的相位在时间点（n-1）处旋转M个状态DELTA On-1，以及该值和Zn-2用于根据以下等式确定在时间点n包括衰减波动的时间点（n-1）处的接收样本的线性预测器：zn-1 +（1+ lambda ）zn-1-lambda zn-2exp（j DELTA On-1）。通过将该zn-1的相位通过DELTA On和zn旋转获得的值之间的平方误差被确定为在分支度量计算部分（16）处的分支度量，并且在维特比解码部分（Viterbi algorithm） 17）通过使用该分支度量。预测系数由误差最小化算法顺序地确定，使得在每次通过的每个时间点回顾性的接收信号样本与预测器之间的误差的加权平方和，在存储经过达到M状态之后的DELTA On n被确定。

10. 发明申请

WO1995007577A1 SLIDING CORRELATION DETECTOR 审中-公开
标题翻译：滑动相关检测器
公开(公告)号：WO1995007577A1
公开(公告)日：1995-03-16
申请号：PCT/JP1994001461
申请日：1994-09-05
申请人： NTT MOBILE COMMUNICATIONS NETWORK INC. , SAWAHASHI, Mamoru , ADACHI, Fumiyuki
发明人： NTT MOBILE COMMUNICATIONS NETWORK INC.
IPC分类号： H04B01/707
CPC分类号： H04B1/7075 , H04B1/708 , H04B1/7095
摘要： A sliding correlation detector which can be used for the receiver of a radio device used for mobile communication adopting a CDMA method using spectrum spread, establishes initial synchronization so as to return signals to narrow-band signals by performing reverse spectrum spread, and, especially, can establish high-speed synchronization. Received spread series signals are stored in a memory circuit (43). The stored received signals are read from the circuit (43) at a sufficiently high speed as compared with the storing speed. A multiplier (45) multiplies the replica of the spread series codes by the received signals read out from the circuit (43), and an integrator (46) integrates the output signal of the multiplier (45) for a prescribed period of time. A threshold judging circuit (47) judges whether or not the output signal of the integrator (46) exceeds a threshold. When it is judged that the output signal of the integrator (46) does not exceed the threshold, the phase of the replica of the spread series codes is changed and judgement is made again. Since the received signals are read out from the memory (43) at a high speed and correlated, initial synchronization can be established quickly.
摘要翻译：可以用于采用使用频谱扩展的CDMA方法的移动通信的无线电设备的接收机的滑动相关检测器建立初始同步，以便通过执行反向频谱扩展将信号返回到窄带信号，特别地，可以建立高速同步。接收的扩展序列信号被存储在存储器电路（43）中。与存储速度相比，以足够高的速度从电路（43）读取所存储的接收信号。乘法器（45）将扩展串行代码的副本乘以从电路（43）读出的接收信号，并且积分器（46）将乘法器（45）的输出信号积分规定的时间段。阈值判定电路（47）判断积分器（46）的输出信号是否超过阈值。当判断积分器（46）的输出信号不超过阈值时，扩展序列代码的副本的相位被改变，并再次进行判断。由于接收的信号以高速从存储器（43）中读出并相关，所以可以快速建立初始同步。

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