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    • 3. 发明授权
    • Controlled environment radio test apparatus and method
    • 受控环境无线电测试仪器和方法
    • US6088582A
    • 2000-07-11
    • US895167
    • 1997-07-16
    • Frank James CanoraEphraim Bemis FlintBrian Paul Gaucher
    • Frank James CanoraEphraim Bemis FlintBrian Paul Gaucher
    • G01R29/08G01R31/28H04B1/08H04B17/00H04B1/16
    • G01R29/0821H04B1/08H04B17/0085H04B17/309H04B17/391
    • A controlled environment radio test apparatus includes first and second chambers for receiving respective first and second radio devices therein. The chambers are sized in proportion to an operational frequency of the radio devices to be tested. A signal-carrying conductor is coupled to the first and second chambers to carry a radio signal therebetween. A signal control device is connected to the radio test apparatus and configured for adjustably introducing selected signal impairments into the radio signal in order to controllably impair the radio signal. An output coupler may be provided for monitoring the effect of the signal impairments on the radio signal. An input coupler may be provided for introducing one or more perturbing signals into the radio signal. The first chamber is adapted so that transmission control inputs can be provided to the first radio device and the second chamber is adapted so that reception monitoring outputs can be received from the second radio device. The first chamber may be further adapted so that auxiliary input and output signals are provided to and received from the first chamber.
    • 受控环境无线电测试设备包括用于在其中接收相应的第一和第二无线电设备的第一和第二室。 这些室的大小与要测试的无线电设备的工作频率成比例。 信号承载导体耦合到第一和第二室,以在其间承载无线电信号。 信号控制装置连接到无线电测试装置,并被配置为可选择地将所选择的信号损伤引入无线电信号,以便可控制地削弱无线电信号。 可以提供输出耦合器用于监视信号损伤对无线电信号的影响。 可以提供输入耦合器用于将一个或多个扰动信号引入到无线电信号中。 第一室被适配成使得可以向第一无线电设备提供传输控制输入,并且第二室适于使得可以从第二无线电设备接收接收监视输出。 第一腔室可以进一步适配,使得辅助输入和输出信号被提供给第一腔室并从第一腔室接收。
    • 4. 发明授权
    • Cordless connection for a data/fax modem
    • 数据/传真调制解调器的无线连接
    • US6128510A
    • 2000-10-03
    • US855502
    • 1997-05-13
    • Troy James BeukemaMichael Frank CinaEphraim Bemis FlintBrian Paul GaucherYoung Hoon KwarkModest Michael OpryskoWilliam Edward PenceSaila Ponnapalli
    • Troy James BeukemaMichael Frank CinaEphraim Bemis FlintBrian Paul GaucherYoung Hoon KwarkModest Michael OpryskoWilliam Edward PenceSaila Ponnapalli
    • H04M1/725H04M11/00H04W4/18H04W24/00H04W68/00H04W76/02H04W84/10H04W88/08H04Q7/20
    • H04W68/00H04M1/725H04W24/00H04W4/18H04W76/02H04W84/10H04W88/08
    • A cordless modem comprises a radio pair interfaced to a standard data/fax modem which allows a user of a personal computer to wirelessly connect to a telephone line. One end of the radio pair is a remote unit interfaced to the modem contained within the PC while the other end is a base unit connected to a standard telephone wall jack. The base unit can selectively discriminate and adjust for signals received from a telephone voice handset or data signals received from the cordless modem remote unit. Upon receiving an off-hook signal or an incoming call signal, the base unit identifies the type of data (i.e., voice or computer modem data) and adapts accordingly by placing an FM modulator in either of a narrow band deviation or a wide band deviation covering the required range of the particular signal combined with local echo. That is, when voice data is present, a low deviation, narrow filter combination is selected. If, on the other hand, the computer data from the cordless modem is detected, a higher deviation, wider bandwidth filter is selected. In addition, the remote unit switches a pre-detection filter from one mode to another depending on whether it is connected to a computer modem or to a voice handset. Security from eavesdroppers as well as the mitigation of signal fading is provided by overlaying a pseudo-random number (PN) code on the FM modulated signal.
    • 无线调制解调器包括接口到标准数据/传真调制解调器的无线电对,其允许个人计算机的用户无线地连接到电话线。 无线电对的一端是与包含在PC内的调制解调器接口的远程单元,而另一端是连接到标准电话墙壁插座的基座单元。 基本单元可以有选择地识别和调整从电话语音手机接收的信号或从无绳调制解调器远程单元接收的数据信号。 在接收到摘机信号或来电信号时,基本单元识别数据的类型(即语音或计算机调制解调器数据),并通过将FM调制器置于窄带偏差或宽带偏差 涵盖特定信号与本地回波结合的所需范围。 也就是说,当存在语音数据时,选择低偏差,窄的滤波器组合。 另一方面,如果检测到来自无绳调制解调器的计算机数据,则选择较高偏差的较宽带宽滤波器。 此外,远程单元根据是否连接到计算机调制解调器或语音手机将预检测滤波器从一种模式切换到另一种模式。 通过在FM调制信号上重叠伪随机数(PN)码来提供来自窃听者的安全性以及信号衰落的减轻。