-
公开(公告)号：US06756854B2
公开(公告)日：2004-06-29
申请号：US10284911
申请日：2002-10-31
IPC分类号： H03B2900
CPC分类号： H03B29/00
摘要： A digitally controlled angle noise signal generator for generating a signal with precise and accurate noise. The signal generator is formed of a digital noise generator for generating a digital noise signal &thgr;N, and a digital signal generator for forming an internal signal S. The digital signal generator receives the digital noise signal &phgr;N and modulates the internal signal S with the digital noise signal &phgr;N to generate a digitally controlled signal yg=S{&thgr;N}, where is the modulation operator, with precise and accurate noise.
摘要翻译： 一种数字角度噪声信号发生器，用于产生具有精确和准确噪声的信号。 信号发生器由用于产生数字噪声信号thetaN的数字噪声发生器和用于形成内部信号S的数字信号发生器形成。数字信号发生器接收数字噪声信号phi，并用数字噪声调制内部信号S 信号phiN以产生数字控制信号yg = S
{thetaN}，其中 是调制操作员，具有精确和准确的噪声。 -
公开(公告)号：US07349457B2
公开(公告)日：2008-03-25
申请号：US10812226
申请日：2004-03-29
CPC分类号： H04B17/16
摘要： A signal analyzer to characterize the RF signal transmitted by a frequency hopping radio transmitter. The transmitted signal is analyzed while hopping across a broad frequency band without knowledge of the hop frequencies, timing or signal bandwidth. A wide range of signal parameters are measured on the dehopped signal to characterize the radio performance and the compliance to the radio specifications.
摘要翻译： 信号分析仪，用于表征由跳频无线电发射机发射的RF信号。 分析传输的信号，同时跳过宽频带，而不知道跳频，定时或信号带宽。 在去噪信号上测量各种信号参数，以表征无线电性能和符合无线电规范。
-
公开(公告)号：US07634239B2
公开(公告)日：2009-12-15
申请号：US10812227
申请日：2004-03-29
IPC分类号： H04B17/00
CPC分类号： H04B1/713
摘要： The subject of this patent is a system to generate RF frequency hopped signals that can be used to test radio receivers over the range of their signal specifications. The hop sequence and symbols in the signal is decoded from signals transmitted by the same or different radio of the same specification. The system can set various signal parameters to any prescribed value. These parameters include carrier frequency error, bit rate error, rise and fall times, amplitude ripple and roll off, modulation depth, nonlinearities, burst duration, burst start time and burst interval. Signal interference can be added to the signal including tones, other signals, noise and other signals of the same as the test radio. Similarly other communications equipment can be tested by the combination of receiving and demodulating a transmitted and regenerating the signal with the same symbols with specified signal parameters.
摘要翻译： 该专利的主题是产生可用于在其信号规格范围内测试无线电接收机的RF跳频信号的系统。 信号中的跳频序列和符号由相同规格的相同或不同无线电发射的信号进行解码。 系统可以将各种信号参数设置为任意规定值。 这些参数包括载波频率误差，比特率误差，上升和下降时间，幅度波动和滚降，调制深度，非线性，突发持续时间，突发起始时间和突发间隔。 信号干扰可以添加到包括音调，其他信号，噪声和与测试无线电相同的其他信号的信号中。 类似地，可以通过组合接收和解调具有指定信号参数的具有相同符号的信号的发送和再生来测试其它通信设备。
-
4.发明授权Validation method and apparatus for preventing unauthorized use of cellular phones 失效用于防止未经授权使用蜂窝电话的验证方法和装置
公开(公告)号：US5870672A
公开(公告)日：1999-02-09
申请号：US628786
申请日：1996-04-05
CPC分类号： H04W12/12
摘要： Validating identification clusters formed of unique transmitter intercepts and validating clusters based on information within the cluster data with or without the aid of specific intercepts. Transmitter validation signals are allocated for validating specific ones of the transmitters. Analyzers identify specific received intercepts from specific ones of the transmitters to form an identification signal. Storage is provide for storing the specific received intercepts with corresponding identification clusters for marking the specific identification cluster as validated or invalidated. The valid and invalid states of the stored clusters are used to authorize or prevent access by the transmitters to the communication system.
摘要翻译： 验证由唯一的发射机拦截形成的识别集群，并根据集群数据内的信息验证集群，有或没有特定拦截的帮助。 分配发射机验证信号以验证发射机中的特定发射机。 分析仪识别来自特定发射机的特定接收截距以形成识别信号。 存储用于存储具有相应识别簇的特定接收拦截，用于将特定标识簇标记为已验证或无效。 存储的集群的有效和无效状态用于授权或阻止发射机对通信系统的访问。
-
5.发明授权
公开(公告)号：US5905949A
公开(公告)日：1999-05-18
申请号：US576116
申请日：1995-12-21
摘要： Apparatus for identifying wireless subscriber units and for determining if access to a communications network should be granted. A plurality of wireless subscriber units each generates a wireless subscriber signal including internal data traits and external signal traits. The internal data traits include an identification code. A RF downconverter is located remote from the wireless subscriber units and receives the wireless subscriber signal. A characterizing device is connected to the RF downconverter and extracts parameters that characterize the external signal traits of the wireless subscriber units. A decision device computes the likelihood that the observed parameters belong to the validated wireless subscriber unit to determine if access to the wireless subscriber service should be granted. The apparatus may be used to prevent cellular telephone cloning fraud.
摘要翻译： 用于识别无线用户单元并用于确定是否应该授予对通信网络的接入的装置。 多个无线用户单元各自产生包括内部数据特征和外部信号特征的无线用户信号。 内部数据特征包括识别码。 RF下变频器位于远离无线用户单元的位置，并接收无线用户信号。 表征设备连接到RF下变频器，并提取表征无线用户单元的外部信号特性的参数。 决策设备计算观测参数属于经过验证的无线用户单元以确定是否应该授予无线用户服务的接入的可能性。 该装置可以用于防止蜂窝电话克隆欺诈。
-
-
-
-
搜索结果
5 条记录 (耗时 0.029 秒)
