专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6072791A CDMA spread spectrum mobile phone 失效
标题翻译： CDMA扩频手机
公开(公告)号：US6072791A
公开(公告)日：2000-06-06
申请号：US938113
申请日：1997-09-26
申请人： Taku Nagase , Osamu Kato , Gen-Ichiro Ota
发明人： Taku Nagase , Osamu Kato , Gen-Ichiro Ota
IPC分类号： H04B1/707 , H04B7/26 , H04J13/16 , H04W52/02 , H04B10/04
CPC分类号： H04B1/707 , H04B1/709
摘要： 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.
摘要翻译：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。

IPRDB

热门服务

关于我们

友情链接

联系方式