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1. 发明授权

US4908785A Data compression method for telemetry of vibration data 失效
标题翻译：振动数据遥测数据压缩方法
公开(公告)号：US4908785A
公开(公告)日：1990-03-13
申请号：US766738
申请日：1985-08-16
申请人： Thomas D. Cubbins , Thomas R. Hope , John M. Michels
发明人： Thomas D. Cubbins , Thomas R. Hope , John M. Michels
IPC分类号： H04B1/66
CPC分类号： H04B1/667
摘要： Vibrational data is compressed about 8.5 to 18 times by isolating a low frequency component from the signal, frequency analyzing the signal to obtain important frequency/amplitude data, and recombining the low frequency component with the analyzed information for efficient transmission.
摘要翻译：通过从信号中分离低频分量来振动数据被压缩约8.5到18倍，对信号进行频率分析以获得重要的频率/振幅数据，并将低频分量与分析的信息重新组合以实现有效传输。

2. 发明授权

US5301366A High performance frequency tuning with low cost synthesizer 失效
标题翻译：具有低成本合成器的高性能频率调谐
公开(公告)号：US5301366A
公开(公告)日：1994-04-05
申请号：US864988
申请日：1992-04-07
申请人： Richard A. Groshong , Thomas R. Hope , Robert A. Newgard
发明人： Richard A. Groshong , Thomas R. Hope , Robert A. Newgard
IPC分类号： H04B1/10 , H03L7/23 , H04B1/16 , H04B1/26 , H04B1/40
CPC分类号： H03L7/23
摘要： A communication system and a method for using an approximating frequency synthesizer with frequency correction by digital signal processing (DSP) means to provide a radio transmitter or receiver with rapid high resolution tuning capabilities. A user selects a frequency upon which he wishes to transmit or receive information. An approximating synthesizer is used to provide an RF injection frequency. A radio controller interprets the user selected frequency and determines the closet available approximating synthesizer frequency. The controller commands the approximating synthesizer to the determined available frequency and calculates the difference in the determined available frequency and the user selected frequency. The calculated difference or error is passed on to the DSP for correction during frequency mixing in a single or multiple step process.
摘要翻译：通过数字信号处理（DSP）使用具有频率校正的近似频率合成器的通信系统和方法意味着为无线电发射机或接收机提供快速的高分辨率调谐能力。用户选择他希望发送或接收信息的频率。近似合成器用于提供射频注入频率。无线电控制器解释用户选择的频率，并确定衣柜可用近似合成器频率。控制器将近似合成器命令为确定的可用频率，并计算所确定的可用频率和用户选择的频率之间的差异。计算的差异或误差在单个或多个步骤过程中在频率混合期间传递给DSP进行校正。

3. 发明授权

US5604929A System for correcting quadrature gain and phase errors in a direct conversion single sideband receiver independent of the character of the modulated signal 失效
标题翻译：用于校正直接转换单边带接收机中的正交增益和相位误差的系统，与调制信号的字符无关
公开(公告)号：US5604929A
公开(公告)日：1997-02-18
申请号：US426315
申请日：1995-04-21
申请人： Roger K. Loper , Thomas R. Hope , Charles S. Farlow
发明人： Roger K. Loper , Thomas R. Hope , Charles S. Farlow
IPC分类号： H03D1/22 , H04B1/30 , H04B1/26
CPC分类号： H03D1/2245 , H04B1/302
摘要： A system connecting and controlling gain and phase errors in a direct conversion receiver having a pair of signal channels carrying I and Q baseband signal components in a quadrature relationship. The system operates by treating all phase and gain errors as resident in the Q channel and thus describes an iterative process generating a plurality of intermediary signals that in turn incorporate a trigonometric product of the IF signal and the I and Q signal component to produce a pair of correction factors that ideally maintains a matched quadrature relationship between the two signal channels.
摘要翻译：一种直接转换接收机中连接和控制增益和相位误差的系统，该直接转换接收机具有正交关系中承载I和Q基带信号分量的信号通道对。该系统通过将所有相位和增益误差处理为驻留在Q通道中来进行操作，并且因此描述了产生多个中间信号的迭代过程，该迭代过程又包含IF信号和I和Q信号分量的三角乘积以产生一对的校正因子，理想地维持两个信号通道之间的匹配正交关系。

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