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    • 1. 发明授权
    • Code generating method and code selecting method
    • 代码生成方法和代码选择方法
    • US06424618B1
    • 2002-07-23
    • US09091422
    • 1998-06-24
    • Mitsuru UesugiTaku NagaseOsamu Kato
    • Mitsuru UesugiTaku NagaseOsamu Kato
    • H04J1300
    • H04J13/18H04J13/004H04J13/12
    • The present invention relates to a code generating method for combining an orthogonal code for CDMA having a specific spreading factor and its polarity inverted spreading code to generate another spreading code having a larger spreading factor than that of the spreading code. And the present invention relates to a code selecting method for combining an orthogonal code for CDMA having a specific spreading factor and its polarity inverted spreading code to generate another spreading code having a larger spreading factor than that of the spreading code, then to assign the generated orthogonal code for a user in order of users having an orthogonal code of small spreading factor.
    • 本发明涉及一种用于组合具有特定扩展因子的CDMA正交码及其极性反转扩展码的码产生方法,以产生具有比扩频码扩频率更大的扩展因子的另一扩展码。 本发明涉及一种编码选择方法,用于组合具有特定扩展因子的CDMA的正交码及其极性反转的扩展码,以产生具有比扩展码更大的扩展因子的另一扩展码,然后分配所生成的 正交码的用户按照具有小扩频因子的正交码的用户的顺序。
    • 5. 发明授权
    • Radio communication equipment using algorithm diversity
    • 无线电通信装置采用算法分集
    • US06259721B1
    • 2001-07-10
    • US09091836
    • 1998-06-30
    • Mitsuru UesugiOsamu Kato
    • Mitsuru UesugiOsamu Kato
    • H04B1500
    • H04L1/02H04B1/707H04J13/16
    • The present invention is characterized by that, at a reception section of a base station in a CDMA system including a reception antenna, a radio section and the number of demodulators corresponding to the number of users where spreading codes of a plurality of spreading factors are available, an algorithm diversity controller and a selector are prepared, information concerning spreading factors of spreading codes utilized by users and others are applied to the algorithm diversity controller, algorithm diversity controller instructs the number of demodulators prepared corresponding to the number of users and the selector, and when signals transmitted by a user utilizing a spreading code of a low spreading factor, i.e. signals with high symbol rate, are received, by demodulating signals with different reception methods or different parameters at demodulators leftover because of the low spreading factor, the demodulated signals of the best quality are selected.
    • 本发明的特征在于,在包括接收天线的CDMA系统中的基站的接收部分,无线电部分和与多个扩频因子的扩展码可用的用户数相对应的解调器数量 ,准备了算法分集控制器和选择器,将与用户等使用的扩频码的扩展因子有关的信息应用于算法分集控制器,算法分集控制器指示与用户数量和选择器对应的解调器数量, 并且当由用户利用低扩频因子的扩频码(即具有高符号速率的信号)发送的信号时,由于低扩频因子,在解调器剩余的解调器处理具有不同接收方式或不同参数的信号,解调信号 选择最好的质量。
    • 6. 发明授权
    • CDMA spread spectrum mobile phone
    • CDMA扩频手机
    • US6072791A
    • 2000-06-06
    • US938113
    • 1997-09-26
    • Taku NagaseOsamu KatoGen-Ichiro Ota
    • Taku NagaseOsamu KatoGen-Ichiro Ota
    • H04B1/707H04B7/26H04J13/16H04W52/02H04B10/04
    • H04B1/707H04B1/709
    • A spread spectrum portable telephone apparatus operates with long wait times and with little battery depletion while waiting. A mobile unit receiver receives and detects radio signals, analog-to-digital (AD) converts the detected reception signals, waveform-shapes the converted signals, despreads and decodes the waveform-shaped signals with a spread signal, frame-resolves the decoded signals, and extracts reception date from the frame-resolved signals. A data receiver is included which has, for both a pager channel and a communications channel, a narrow band AD converter circuit, a narrow band reception filter for waveform-shaping the AD converted signals, and a correlator which despreads and decodes the waveform-shaped signal using a spread code generated by a low speed spread code generator circuit. When waiting, calls to the apparatus are waited for with the power turned on only to the paging channel data receiver.
    • 扩频便携式电话设备在等待时间长的情况下操作,并且在等待时电池耗尽少。 移动单元接收器接收并检测无线电信号,模数(AD)转换检测到的接收信号,对转换的信号进行波形整形,用扩展信号对波形信号进行解扩和解码,从而解码解码信号 ,并从帧解析信号中提取接收日期。 包括对于寻呼机通道和通信信道都具有窄带AD转换器电路,用于对AD转换信号进行波形整形的窄带接收滤波器的数据接收器,以及对波形形状进行解扩和解码的相关器 信号使用由低速扩展码发生器电路产生的扩展码。 等待时,只有打开通道数据接收器的电源才能等待设备的呼叫。
    • 10. 发明授权
    • Mobile radio apparatus
    • 移动无线电设备
    • US5438701A
    • 1995-08-01
    • US162358
    • 1993-12-07
    • Daisuke YamadaOsamu KatoKazuyuki MiyaTaku Nagase
    • Daisuke YamadaOsamu KatoKazuyuki MiyaTaku Nagase
    • H04B7/26H04W52/02H04B1/38
    • H04W52/0229H04W52/0296Y02B60/50
    • When a power supply of a mobile radio apparatus is turned on, a power supply change-over switch of a power supply control unit is changed over to the side of a pager unit to turn on only a power supply of the pager unit, so that a pager network which does not require position registration is utilized to perform intermittent receiving operation with low power consumption. When there is an incoming call to the pager unit, a CPU of the power supply control unit receives an incoming control signal from a pager decoding circuit and changes over the power supply change-over switch to the side of a radio-telephone line terminal unit to turn on the radio telephone line terminal unit and turn off the pager unit. The CPU sends a control signal to a timing control circuit of the radio-telephone line terminal unit so that the position registration is performed by utilizing a mobile radio network and an operation mode of the mobile radio apparatus proceeds to a usual talking mode. After a pager calling has been performed in a calling side, the mobile radio apparatus is called by the portable telephone number and talking is then is made. When the talking has been finished, the CPU receives a control signal from the timing control circuit and changes over the power supply change-over switch to the side of the pager unit again to turn on the pager unit to enter a waiting state for reception.
    • 当移动无线电设备的电源接通时,电源控制单元的电源转换开关切换到寻呼机单元的侧面,仅接通寻呼机单元的电源,从而 利用不需要位置登记的寻呼机网络,以低功耗进行间歇接收动作。 当对寻呼机单元进行呼入时,电源控制单元的CPU接收来自寻呼机解码电路的输入控制信号,并将电源切换开关切换到无线电话线路终端单元侧 打开无线电话线终端单元并关闭寻呼机单元。 CPU向无线电话线路终端单元的定时控制电路发送控制信号,使得通过利用移动无线电网络执行位置登记,并且移动无线电设备的操作模式进行到通常的通话模式。 在呼叫方执行寻呼机呼叫之后,移动无线电设备被便携式电话号码呼叫,然后进行通话。 当通话完成时,CPU接收来自定时控制电路的控制信号,并再次切换到寻呼机单元侧的电源切换开关,以使寻呼机单元接通等待状态。