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1. 外观设计

USD434745S Pay telephone 失效
公开(公告)号：USD434745S
公开(公告)日：2000-12-05
申请号：US106812
申请日：1999-06-21
申请人： Douglas Lau , Carl Engelbrecht , Doug Jones , Dean Amir Depay , Andrew Hooper , Temujin Kuechie , David Moriconi
设计人： Douglas Lau , Carl Engelbrecht , Doug Jones , Dean Amir Depay , Andrew Hooper , Temujin Kuechie , David Moriconi

2. 发明授权

US5918181A Method and apparatus for tracking location of wireless terminals in a nanocellular digital cordless terminal network coupled to a local exchange 失效
标题翻译：用于跟踪耦合到本地交换机的纳米蜂窝数字无绳终端网络中的无线终端的位置的方法和装置
公开(公告)号：US5918181A
公开(公告)日：1999-06-29
申请号：US730590
申请日：1996-10-15
申请人： Theresa A. Foster , Douglas Lau
发明人： Theresa A. Foster , Douglas Lau
IPC分类号： H04W8/04 , H04W68/00 , H04W76/02 , H04Q7/38
CPC分类号： H04W8/04 , H04W68/00 , H04W76/02
摘要： A method and apparatus provide for operating and locating a digital cordless telephone (DCT) handset among an integrated network of base stations. The present system utilizes a standard communication protocol to establish radio communication links between terminals and a network of base stations, where each base station is directly interfaced to a local exchange and is capable of providing access to the public and/or private telephone network. Each base station is a network node that contains a copy of a common database that may be updated, as needed, to provide current information on the location of individual terminals. The common database contains various information on each base station, each terminal, and the latest location of each terminal at a particular base station. Further, with the temporary attachment and use of a computer to a master base station in the network, the DCT system is capable of using the common database to register terminals, locate terminals, and allocate communication channels between terminals and base stations.
摘要翻译：一种方法和装置，用于在基站的集成网络中操作和定位数字无绳电话（DCT）手持机。本系统利用标准通信协议来建立终端与基站网络之间的无线电通信链路，其中每个基站直接连接到本地交换机，并且能够提供对公共和/或私人电话网络的接入。每个基站是包含可以根据需要更新的公共数据库的副本以提供关于各个终端的位置的当前信息的网络节点。公共数据库包含每个基站，每个终端以及特定基站处的每个终端的最新位置的各种信息。此外，随着计算机临时安装和使用网络中的主基站，DCT系统能够使用公共数据库来注册终端，定位终端，并在终端和基站之间分配通信信道。

3. 发明授权

US5511090A Wireless frequency-division-multiple-access direct sequence spread spectrum telephone system 失效
标题翻译：无线频分多址直接序列扩频电话系统
公开(公告)号：US5511090A
公开(公告)日：1996-04-23
申请号：US210187
申请日：1994-03-17
申请人： D. Darryl Denton , Douglas Lau
发明人： D. Darryl Denton , Douglas Lau
IPC分类号： H04B1/707 , H04B1/7085 , H04M1/725 , H04B15/00
CPC分类号： H04B1/7085 , H04B1/707 , H04M1/72502
摘要： A cordless, battery-operated telephone of relatively low power consumption suitable to operate in license-exempt spectrum and which may employ an established communication protocol, such as the CT-2 communication protocol, is realized by providing a direct sequence spread spectrum (DSSS) modulator/spreader and demodulator/despreader in a battery-operated handset in connection with an intelligent CT-2 controller to which is added additional circuitry and functionality in the handset for acquiring, pulling-in and tracking, in both operational and low-power-consumption standby modes, a received DSSS signal from a base station unit. The additional functionality in the handset includes a PN phase discriminator with intelligent oversampling to deal with the time division duplex signals during synchronization, a second order delay lock loop for in-service mode tracking at a moderate loop iteration rate, and an extended-range discriminator and very narrow-band third-order delay lock loop for stand-by mode tracking at a very low loop iteration rate.
摘要翻译：通过提供直接序列扩频（DSSS）来实现适合于免许可频谱操作并且可以采用建立的通信协议（例如CT-2通信协议）的相对低功耗的无绳电池操作电话，与智能CT-2控制器相连的电池供电手机中的调制器/扩展器和解调器/解扩器，在智能CT-2控制器中增加了手持机中的附加电路和功能，用于在操作和低功耗手机中采集，消耗待机模式，来自基站单元的接收到的DSSS信号。手机中的附加功能包括具有智能过采样以在同步期间处理时分双工信号的PN相鉴别器，用于在中等环路迭代速率下进行在用模式跟踪的二阶延迟锁定环路，以及扩展范围鉴别器和非常窄带的三阶延迟锁定环，用于以非常低的循环迭代速率进行待机模式跟踪。

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