公开(公告)号：US06778520B2

公开(公告)日：2004-08-17

申请号：US09805508

申请日：2001-03-14

申请人： Eiji Katsura ,  Masatoshi Watanabe ,  Osamu Kato

发明人： Eiji Katsura ,  Masatoshi Watanabe ,  Osamu Kato

IPC分类号： H04B7216

CPC分类号： H04W36/30 ,  H04B7/2618 ,  H04W36/18

摘要： A radio communication apparatus and system in a CDMA/TDD system includes a mobile station that detects received power of data received from a surrounding base station at a received power detecting circuit in switching a base station for communication while moving. When received power from a base station other than a main base station in current communication becomes higher than a predetermined level, the mobile station makes the base station a sub base station to transmit the same data as the main base station, and receives data from the main base station and the sub base station concurrently at a pair of correlators. After that, when the received power from the sub base station becomes higher than the received power from the main base station, the mobile station switches a main base station and a sub base station and transmits data to a new main base station.

摘要翻译： CDMA / TDD系统中的无线通信装置和系统包括：移动站，用于在移动时检测在接收功率检测电路中切换基站进行通信的周围基站接收的数据的接收功率。 当来自当前通信以外的主基站的基站的接收功率变得高于预定电平时，移动台使基站成为子基站发送与主基站相同的数据，并从 主基站和子基站同时在一对相关器。 此后，当来自子基站的接收功率变得高于来自主基站的接收功率时，移动台切换主基站和子基站，并向新的主基站发送数据。

公开(公告)号：US06665287B1

公开(公告)日：2003-12-16

申请号：US09284956

申请日：1999-05-04

申请人： Eiji Katsura ,  Masatoshi Watanabe ,  Osamu Kato

发明人： Eiji Katsura ,  Masatoshi Watanabe ,  Osamu Kato

IPC分类号： H04B7216

CPC分类号： H04W36/30 ,  H04B7/2618 ,  H04W36/18

摘要： The present invention relates to a radio communication apparatus and system in a CDCA/TDD system in which a mobile station detects received power of data received from a surrounding base station at a received power detecting circuit in switching a base station for communication as moving. When received power from a base station other than a main base station in current communication becomes higher than a predetermined level, the mobile station makes the base station a sub base station to transmit the same data as the main base station, and receives data from the main base station and the sub base station concurrently at a pair of correlators. After that, when the received power from the sub base station becomes higher than the received power from the main base station, the mobile station switches a main base station and a sub bass station and transmits data to a new main base station.

摘要翻译： 本发明涉及一种CDCA / TDD系统中的无线电通信装置和系统，其中移动站在接收功率检测电路中检测从周围基站接收的数据的接收功率，从而将基站进行通信作为移动。 当来自当前通信以外的主基站的基站的接收功率变得高于预定电平时，移动台使基站成为子基站发送与主基站相同的数据，并从 主基站和子基站同时在一对相关器。 此后，当来自子基站的接收功率变得高于来自主基站的接收功率时，移动台切换主基站和次低音站，并向新的主基站发送数据。

公开(公告)号：US06661783B1

公开(公告)日：2003-12-09

申请号：US09264856

申请日：1999-03-09

申请人： Masatoshi Watanabe ,  Masaki Hayashi ,  Osamu Kato

发明人： Masatoshi Watanabe ,  Masaki Hayashi ,  Osamu Kato

IPC分类号： H04J1300

CPC分类号： H04W52/267 ,  H04J13/0048 ,  H04J13/12

摘要： During asymmetric communications using only the uplink, frame configuration section 109 transmits a signal made up of only pilot signals and transmission power control bits assembled into frames. The transmission power control method is the same as that for normal communications. In this case, since signals transmitted on the downlink are only pilot signals and transmission power control bits, it is possible to reduce the transmission rate considerably and transmit signals with its transmission power reduced by transmission signal amplitude control section 111. In this case, a long hierarchic orthogonal type spreading code is set as the spreading code used by spreader 110.

摘要翻译： 在仅使用上行链路的非对称通信期间，帧配置部分109发送仅由导频信号组成的信号和组合成帧的发送功率控制比特。 发送功率控制方法与通常通信方式相同。 在这种情况下，由于在下行链路上发送的信号仅仅是导频信号和发送功率控制比特，所以可以显着地降低传输速率，并且以传输功率减小发送信号幅度控制部分111的方式发送信号。在这种情况下， 长分层正交类型扩展码被设置为扩展器110使用的扩展码。

公开(公告)号：US06526271B1

公开(公告)日：2003-02-25

申请号：US09403026

申请日：1999-10-20

申请人： Mitsuru Uesugi ,  Kazuyuki Miya ,  Osamu Kato ,  Katsuhiko Hiramatsu ,  Akinori Tatsumi ,  Masatoshi Watanabe ,  Izumi Horikawa ,  Atsushi Iwaoka

发明人： Mitsuru Uesugi ,  Kazuyuki Miya ,  Osamu Kato ,  Katsuhiko Hiramatsu ,  Akinori Tatsumi ,  Masatoshi Watanabe ,  Izumi Horikawa ,  Atsushi Iwaoka

IPC分类号： H04B110

CPC分类号： H04B1/7107 ,  H04B1/71072 ,  H04W52/08

摘要： A small number of users who provide high interference in the other users, such as a user transmitting a high rate signal, are selected beforehand. First, a signal of the user is demodulated to generate a replica, and a difference between a received signal and the replica is calculated, thereby canceling the interference in signals of the other users, and further improving the system capacity.

摘要翻译： 预先选择对其他用户提供高干扰的少量用户，例如发送高速率信号的用户。 首先，对用户的信号进行解调以生成副本，并且计算接收信号与副本之间的差异，从而消除其他用户的信号的干扰，并进一步提高系统容量。

公开(公告)号：US6047015A

公开(公告)日：2000-04-04

申请号：US546554

申请日：1995-10-20

申请人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

发明人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

IPC分类号： H04B1/692 ,  H04B1/709 ,  H04B7/26 ,  A61F2/06 ,  H04L27/30

CPC分类号： H04B1/709 ,  H04B1/692 ,  H04B7/2628

摘要： A mobile radio apparatus includes a base station and a mobile station which communicate with each other by a hybrid code division multiple access scheme. The base station selects a hopping pattern in a frequency hopping method so as to completely avoid overlapping of a carrier for a forward link signal with a carrier for a reverse link signal at the same time, and transmits the forward link signal in a predetermined frequency band. The mobile station similarly transmits the reverse link signal. The mobile station has a multiplier for multiplying the forward link signal by a carrier at the same frequency as the carrier for the forward link signal to derive a received signal, a communication channel correlator for detecting a correlation of the received signal to separate a communication channel signal, a received power level detector circuit for detecting a received power level of the communication channel signal, and a transmission power level control signal for controlling a transmission power level of the reverse link signal, when transmitted to the base station, based on the received power level of the communication channel signal, using a carrier at the same frequency as the carrier for the forward link signal when the received power level of the communication channel signal is detected.

摘要翻译： 移动无线电设备包括通过混合码分多址方案相互通信的基站和移动台。 基站以跳频方式选择跳频图案，以便完全避免前向链路信号的载波与用于反向链路信号的载波同时重叠，并且将预定频带中的前向链路信号 。 移动站类似地发送反向链路信号。 移动站具有乘法器，用于将前向链路信号乘以与用于前向链路信号的载波相同频率的载波以导出接收信号;通信信道相关器，用于检测接收信号的相关性以分离通信信道 信号，用于检测通信信道信号的接收功率电平的接收功率电平检测器电路，以及发送功率电平控制信号，用于当基于接收到的信号发送到基站时控制反向链路信号的发送功率电平 当检测到通信信道信号的接收功率电平时，使用与前向链路信号的载波相同频率的载波的通信信道信号的功率电平。

公开(公告)号：US5802110A

公开(公告)日：1998-09-01

申请号：US385961

申请日：1995-02-09

申请人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

发明人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

IPC分类号： H04B7/005 ,  H04L5/14 ,  H04L27/00 ,  H04K1/00

CPC分类号： H04L5/1492 ,  H04W52/04

摘要： A base station transmits a first signal spread according to a direct spread scheme and having carrier frequencies hopped between two frequencies f1 and f2. In a mobile station, output signals of two carrier generators are changed over by a change-over switch. When the signal transmission frequency in the base station is f1, the mobile station receives the first signal having the frequency f1 and transmits a second signal having the frequency f2. When the signal transmission frequency in the base station is f2, the mobile station receives the first signal having the frequency f2 and transmits the second signal having the frequency f1. A received power level detector in the mobile station detects a power level of the first signal received during each hop (the duration of the same frequency), and, on the basis of the detected power level, a transmission power level control circuit controls the power level of the second signal to be transmitted during the next hop, that is, at the time of transmission of the second signal having the same carrier frequency as that of the first signal whose power level has been detected.

摘要翻译： 基站发送根据直接扩展方案扩展的第一信号，并且具有在两个频率f1和f2之间跳过的载波频率。 在移动站中，两个载波发生器的输出信号由切换开关切换。 当基站中的信号发送频率为f1时，移动站接收具有频率f1的第一信号，并发送具有频率f2的第二信号。 当基站的信号发送频率为f2时，移动站接收具有频率f2的第一信号，并发送具有频率f1的第二信号。 移动站中的接收功率电平检测器检测在每一跳期间接收到的第一信号（相同频率的持续时间）的功率电平，并且基于检测到的功率电平，发送功率电平控制电路控制功率 在下一跳期间要发送的第二信号的电平，即在与检测到功率电平的第一信号具有相同载波频率的第二信号的发送时。

公开(公告)号：US06493330B1

公开(公告)日：2002-12-10

申请号：US09615325

申请日：2000-07-12

申请人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

发明人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

IPC分类号： H04B7216

CPC分类号： H04W52/32 ,  H04B1/707 ,  H04B1/7097 ,  H04B7/2637 ,  H04B2201/70701

摘要： A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attain high reliability, the pilot channel can be transmitted with low power by means of weight in comparison with the communication channel, so that interference with the communication channel of any other station is reduced. Moreover, accurate coherent detection can be made from the pilot symbol inserted in the communication channel on the mobile station side.

公开(公告)号：US06490257B1

公开(公告)日：2002-12-03

申请号：US09297091

申请日：1999-05-17

申请人： Masatoshi Watanabe ,  Osamu Kato

发明人： Masatoshi Watanabe ,  Osamu Kato

IPC分类号： H04J1302

CPC分类号： H04W52/10 ,  H04B7/0608 ,  H04B7/08 ,  H04B7/0837 ,  H04W52/282 ,  H04W52/287

摘要： When carrying out CDMA/TDD-based data communications between a base station apparatus and mobile station apparatus, the base station apparatus and mobile station apparatus carry out VOX control turning ON/OFF transmission operation according to the presence/absence of transmission data and if transmission on the base station transmitting side is OFF the mobile station receiving side receives channels being sent all the time from the base station apparatus, performing open-loop transmission power control, and if transmission on the mobile station transmitting side is OFF the mobile station apparatus transmits dummy slots with small transmission power while the base station receiving side receives the dummy slots, performing transmission space diversity.

摘要翻译： 当在基站装置与移动站装置之间进行基于CDMA / TDD的数据通信时，基站装置和移动站装置根据发送数据的有无进行VOX控制进行ON / OFF发送操作，如果发送 在基站发送侧为OFF的情况下，移动台接收侧接收从基站装置全部发送的信道，执行开环发送功率控制，如果移动台发送侧的发送为OFF，则移动台装置发送 在基站接收侧接收虚拟时隙的情况下，具有小的发送功率的虚拟时隙，执行发送空间分集。

公开(公告)号：USRE37870E1

公开(公告)日：2002-10-08

申请号：US09154709

申请日：1998-09-17

申请人： Takayuki Nakano ,  Kazuyuki Miya ,  Osamu Kato ,  Masatoshi Watanabe

发明人： Takayuki Nakano ,  Kazuyuki Miya ,  Osamu Kato ,  Masatoshi Watanabe

IPC分类号： H04J1304

CPC分类号： H04W52/325 ,  H04B7/2618 ,  H04B7/2637 ,  H04W52/10 ,  H04W52/16

摘要： In addition to a structure of a conventional CDMA/TDD radio communication system, a base station includes a pilot signal generating circuit for generating a pilot signal that has a constant transmission power level and is known in mobile units and a pilot channel spreading circuit for transmitting the pilot signal to the mobile units through a transmission line. Each of the mobile units includes a pilot signal reception level measuring circuit for measuring reception power of the received pilot signal and a transmission power control circuit for controlling transmission power of a power amplification circuit based on the measured reception power of the received pilot signal.

摘要翻译： 除了常规的CDMA / TDD无线电通信系统的结构之外，基站还包括一个导频信号产生电路，用于产生具有恒定的发射功率电平且以移动单元已知的导频信号，以及用于传输的导频信道扩展电路 该导频通过传输线向移动单元发送信号。 每个移动单元包括用于测量接收到的导频信号的接收功率的导频信号接收电平测量电路和用于基于所测量的接收到的导频信号的接收功率来控制功率放大电路的发射功率的发射功率控制电路。

公开(公告)号：US6144650A

公开(公告)日：2000-11-07

申请号：US937397

申请日：1997-09-25

申请人： Masatoshi Watanabe ,  Osamu Kato

发明人： Masatoshi Watanabe ,  Osamu Kato

IPC分类号： H04B1/7073 ,  H04L7/04 ,  H04J13/00

CPC分类号： H04B1/70735 ,  H04B2201/70702 ,  H04L7/04

摘要： In a CDMA/TDD cellular system, time necessary for a mobile station to carry out initial synchronization, judgment of the most preferable base station, and acquisition of synchronization of a long code is shortened. A reception base band processing portion 27 reproduces perch channel data from received signals using symbol timing acquired by a synchronous circuit 28. The synchronous circuit 28 detects a unique word from the perch channel data to acquire slot synchronization. A reception level detection circuit 29 judges a base station using a short code of the maximum acquired reception level in the perch channel data to be the nearest. A base station transmits perch channel data in which information with respect to frame timing and information with respect to the kind of a long code used in down communication channel data are interpolated. The synchronous circuit 28 receives the information, acquires frame synchronization, and, using the information with respect to the kind of the long code, acquires long code synchronization.

摘要翻译： 在CDMA / TDD蜂窝系统中，缩短了移动台执行初始同步所需的时间，最优选的基站的判断以及长码的同步的获取。 接收基带处理部分27使用由同步电路28获取的符号定时从接收信号再现导频信道数据。同步电路28从导频信道数据中检测唯一字以获取时隙同步。 接收电平检测电路29使用导频信道数据中的最大获取接收电平的短码来判断基站为最近。 基站发送导频信道数据，其中相对于帧定时的信息和关于在下行通信信道数据中使用的长码的种类的信息被内插。 同步电路28接收信息，获取帧同步，并且使用关于长码的种类的信息来获取长码同步。