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    • 2. 发明授权
    • CDMA communication method and spread spectrum communication system
    • CDMA通信方式和扩频通信系统
    • US6049536A
    • 2000-04-11
    • US866440
    • 1997-05-30
    • Masayuki AriyoshiTakashi YanoHironari MasuiNobukazu Doi
    • Masayuki AriyoshiTakashi YanoHironari MasuiNobukazu Doi
    • H04J13/00H04B7/26H04J13/16H04W72/04H04W76/02H04B7/216
    • H04J13/00H04B7/2634
    • A frequency band for communication between a base station and mobile stations is divided into a reverse-link and a forward-link bands. In each of these bands, carrier frequencies are defined in correspondence with sub frequency bands each having one of several bandwidths. To each of these bands of each mobile station, a sub frequency band with a bandwidth matching a data traffic rate is assigned in advance. Each mobile station spectrum-spreads a reservation packet and transmits the resultant packet by a prescribed carrier frequency corresponding to the reverse-link sub frequency band. The base station spectrum-spreads a response packet and transmits the resultant packet by a prescribed carrier frequency corresponding to the forward-link sub frequency band. Each mobile station spectrum-spreads a data packet by a spreading code for data traffic channel specified in the response packet and transmits the resultant packet by the reverse-link carrier frequency.
    • 用于基站和移动台之间的通信的频带被分成反向链路和前向链路频带。 在这些频带的每一个中,对应于每个具有多个带宽之一的子频带来定义载波频率。 对于每个移动站的这些频带中的每一个,预先分配具有与数据业务速率匹配的带宽的子频带。 每个移动台频谱扩展预留分组,并将所得到的分组发送到与反向链路子频带相对应的规定载波频率。 基站频谱扩展响应分组,并且将所得到的分组发送与对应于前向链路子频带的规定载波频率。 每个移动台通过用于在响应分组中指定的数据业务信道的扩展码对数据分组进行频谱扩展,并通过反向链路载波频率发送所得到的分组。
    • 3. 发明授权
    • CDMA Communication system and method
    • CDMA通信系统及方法
    • US5930244A
    • 1999-07-27
    • US888603
    • 1997-07-07
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • H04B1/707H04B1/7075H04B1/7085H04B7/26H04J13/00H04L7/02H04W92/10H04B7/216
    • H04B1/707H04B1/7085H04J13/00H04W56/0085H04B2201/709709H04W56/0005
    • In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjusts the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of the signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on the reverse links.
    • 在CDMA通信中,基站检测扩频码的基准相位与每个终端的接收信号的相位之差,并将表示相位差的相位跳变信号PJ-i返回给每个终端站。 在定时获取之后,使用参考相位执行接收操作,并且将接收信号的相位与参考相位之间的偏移量作为相位同步控制信息PC-i反馈到每个终端站。 每个终端根据相位跳跃信号PJ-i粗略地调整扩展码的相位,然后根据相位同步控制信息PC-i精细地调整其发送信号的相位。 因此,可以使从终端站发送并在基站处接收的信号的相位同步。 因此,正交码用于在反向链路上进行扩展。
    • 4. 发明授权
    • CDMA communication system and method
    • CDMA通信系统和方法
    • US07916699B2
    • 2011-03-29
    • US12480137
    • 2009-06-08
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • H04B7/216
    • H04B1/707H04B1/7085H04B2201/709709H04J13/00H04W56/0005H04W56/0085
    • In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjusts the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of the signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on the reverse links.
    • 在CDMA通信中,基站检测扩频码的基准相位与每个终端的接收信号的相位之差,并将表示相位差的相位跳变信号PJ-i返回给每个终端站。 在定时获取之后,使用参考相位执行接收操作,并且将接收信号的相位与参考相位之间的偏移量作为相位同步控制信息PC-i反馈到每个终端站。 每个终端根据相位跳跃信号PJ-i粗略地调整扩展码的相位,然后根据相位同步控制信息PC-i精细地调整其发送信号的相位。 因此,可以使从终端站发送并在基站处接收的信号的相位同步。 因此,正交码用于在反向链路上进行扩展。
    • 6. 发明授权
    • CDMA communication system and method
    • CDMA通信系统和方法
    • US07545777B2
    • 2009-06-09
    • US10456577
    • 2003-06-09
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • Masayuki AriyoshiNobukazu DoiTesshin ShigaYoshito Ohta
    • H04B7/216
    • H04B1/707H04B1/7085H04B2201/709709H04J13/00H04W56/0005H04W56/0085
    • In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjusts the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of the signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on the reverse links.
    • 在CDMA通信中,基站检测扩频码的基准相位与每个终端的接收信号的相位之差,并将表示相位差的相位跳变信号PJ-i返回给每个终端站。 在定时获取之后,使用参考相位执行接收操作,并且将接收信号的相位与参考相位之间的偏移量作为相位同步控制信息PC-i反馈到每个终端站。 每个终端根据相位跳跃信号PJ-i粗略地调整扩展码的相位,然后根据相位同步控制信息PC-i精细地调整其发送信号的相位。 因此,可以使从终端站发送并在基站处接收的信号的相位同步。 因此,正交码用于在反向链路上进行扩展。