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    • 4. 发明申请
    • COGNITIVE RADIO SYSTEM, COGNITIVE RADIO APPARATUS, AND RADIO SIGNAL DETECTION METHOD
    • 认知无线电系统,认知无线电设备和无线电信号检测方法
    • US20110085612A1
    • 2011-04-14
    • US12994680
    • 2009-05-25
    • Kazushi MuraokaMasayuki Ariyoshi
    • Kazushi MuraokaMasayuki Ariyoshi
    • H04B7/00H04L27/28H04J11/00H04B1/18H03D5/00
    • H04W16/14H04L27/0006H04W88/02
    • A radio system includes: a memory which stores a system parameter and a pseudo parameter, the system parameter being used for generation of a feature value specific to a search target radio system, the pseudo parameter being similar to the system parameter; a feature value generator which generates one or a plurality of the feature values based on a signal in a received frequency band by using the system parameter; a non-feature value generator which generates one or a plurality of non-feature values based on the signal in the received frequency band by using the pseudo parameter; and a determination section which determines whether or not a signal of the search target radio system exists by using the one or the plurality of the feature values and the one or the plurality of non-feature values.
    • 无线电系统包括:存储器,其存储系统参数和伪参数,所述系统参数用于生成特定于搜索目标无线电系统的特征值,所述伪参数类似于所述系统参数; 特征值生成器,其通过使用所述系统参数,基于接收到的频带中的信号生成一个或多个所述特征量; 非特征值生成器,其通过使用所述伪参数,基于所述接收频带中的信号生成一个或多个非特征值; 以及确定部,其通过使用所述一个或多个所述特征值以及所述一个或多个非特征值来确定是否存在所述搜索目标无线电系统的信号。
    • 5. 发明申请
    • CDMA COMMUNICATION SYSTEM AND METHOD
    • CDMA通信系统和方法
    • US20090245210A1
    • 2009-10-01
    • 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。
    • 10. 发明授权
    • Radio communication method, radio communication device, radio communication program, and radio communication system
    • 无线通信方式,无线通信装置,无线通信程序,无线通信系统
    • US08699362B2
    • 2014-04-15
    • US12808721
    • 2008-12-12
    • Masayuki AriyoshiKazushi MuraokaTakeo FujiiMai Ohta
    • Masayuki AriyoshiKazushi MuraokaTakeo FujiiMai Ohta
    • H04J1/16
    • H04L5/0007H04B1/69H04L5/0035H04L5/0053H04L5/0062H04W16/14H04W64/00
    • In cooperative sensing in which a plurality of cognitive radio apparatus collaboratively exchange sensing information on a status of frequency band usage as a secondary system, the sensing information is efficiently exchanged in the secondary system without influencing communication of the primary system. In a radio communication system according to this invention, a first radio communication device includes means for observing a surrounding radio communication environment, means for converting information obtained by the observation into a parameter used for radio communication, and means for performing transmission by using the parameter, and a second radio communication device includes means for receiving a signal transmitted from the first radio communication device and means for extracting, from the received signal, information on the surrounding radio communication environment that is observed on a transmission side.
    • 在多个认知无线电设备协作地将作为次级系统的频带使用状态的感测信息交换的协作感测中,在二次系统中有效地交换感测信息而不影响主系统的通信。 在根据本发明的无线电通信系统中,第一无线电通信装置包括用于观察周围无线电通信环境的装置,用于将通过观察获得的信息转换为用于无线电通信的参数的装置,以及用于通过使用参数进行发送的装置 第二无线电通信装置包括用于接收从第一无线电通信装置发送的信号的装置和用于从接收信号中提取在发送侧观察到的周围无线电通信环境的信息的装置。