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公开(公告)号：US07139567B2
公开(公告)日：2006-11-21
申请号：US10847942
申请日：2004-05-18
IPC分类号： H04B7/185
CPC分类号： H04B7/18506
摘要： This disclosure presents a communication receiver system for spacecraft that includes an open loop receiver adapted to receive a communication signal. An ultrastable oscillator (USO) and a tone detector are connected to the open loop receiver. The open loop receiver translates the communication signal to an intermediate frequency signal using a highly stable reference frequency from the USO. The tone detector extracts commands from the communication signal by evaluating the difference between tones of the communication signal.
摘要翻译： 本公开提供了一种用于航天器的通信接收机系统，其包括适于接收通信信号的开环接收器。 一个超稳定振荡器（USO）和一个音调检测器连接到开环接收器。 开环接收器使用来自USO的高度稳定的参考频率将通信信号转换为中频信号。 音调检测器通过评估通信信号的音调之间的差异来从通信信号中提取命令。
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2.发明授权Symbol synchronization in a continuous phase modulation communications receiver 有权连续相位调制通信接收机中的符号同步公开(公告)号：US06466630B1
公开(公告)日：2002-10-15
申请号：US09246214
申请日：1999-01-27
申请人： James Robert Jensen
发明人： James Robert Jensen
IPC分类号： H03D318
CPC分类号： H04L27/2332 , H03J7/04 , H04L7/0334
摘要： Symbol synchronization in a continuous phase modulation receiver is achieved by calculating an arctangent function of a digital sample of the output of a quadrature demodulator. This signal is sampled by integration techniques or filtered to produce signals that represent a complex value whose phase changes at a rate which is half of the symbol rate. The complex value may be squared and rotated by an angle which is related to the symbol phase. The integrated sample or an arctangent function of the filtered sample is used as a controlling input for a numerically controlled oscillator which regulates the digital sampling.
摘要翻译： 通过计算正交解调器的输出的数字样本的反正切函数来实现连续相位调制接收器中的符号同步。 该信号通过积分技术进行采样或被滤波以产生表示复数值的信号，其相位以符号率的一半的速率改变。 复数值可以被平方并旋转与符号相位相关的角度。 滤波样本的积分样本或反正切函数用作调节数字采样的数控振荡器的控制输入。
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3.发明授权Method and apparatus for precise noncoherent doppler tracking of a spacecraft 失效用于航天器的精确非相干多普勒跟踪的方法和装置
公开(公告)号：US5995039A
公开(公告)日：1999-11-30
申请号：US66516
申请日：1998-04-24
CPC分类号： G01S13/58 , G01S13/765 , G01S13/60 , G01S7/003
摘要： A method and apparatus are disclosed for making precise velocity measurements of a spacecraft using a two-way noncoherent Doppler tracking system. The received uplink and transmitted downlink frequencies on-board the spacecraft are compared with the resulting information being included in the downlink signal and used to cancel spacecraft oscillator drift rate effects in the two-way Doppler measurement made by the ground station. The information can also be used to characterize the drift rate of the spacecraft oscillator, thus permitting periods of accurate one-way Doppler tracking by the ground station. To improve accuracy, the times at which the measurements comprising the information would have been observed on the ground are inferred from the measurement of a signal generated by the spacecraft, e.g., the telemetry frame start times, made by the ground station.
摘要翻译： 公开了一种使用双向非相干多普勒跟踪系统对航天器进行精确速度测量的方法和装置。 将在航天器上接收的上行链路和发送的下行链路频率与包括在下行链路信号中的所得信息进行比较，并用于取消由地面站进行的双向多普勒测量中的航天器振荡器漂移速率效应。 该信息还可用于表征航天器振荡器的漂移速率，从而允许地面站进行精确的单向多普勒跟踪的周期。 为了提高准确性，从地面站产生的由航天器产生的信号的测量（例如，遥测帧开始时间）的测量中推断出包含信息的测量结果将在地面上观测到的时间。
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4.发明授权System and method for encoding and decoding digital data using acoustical tones 失效使用声音对数字数据进行编码和解码的系统和方法公开(公告)号：US07187718B2
公开(公告)日：2007-03-06
申请号：US10695168
申请日：2003-10-27
申请人： James Robert Jensen
发明人： James Robert Jensen
摘要： A system and a method for the transmission and reception of digital data wirelessly using acoustic tones comprises an encoder, a data interleaving system, an error correction system, and a decoder. The digital data is decoded by using in-phase and quadrature filters and through a score based function that determines the data that was most likely transmitted.
摘要翻译： 使用声学音调无线地发送和接收数字数据的系统和方法包括编码器，数据交织系统，纠错系统和解码器。 通过使用同相和正交滤波器以及通过基于分数的函数来解码数字数据，该函数确定最可能传输的数据。
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5.发明授权Method and apparatus for precise noncoherent doppler tracking of a spacecraft 失效用于航天器的精确非相干多普勒跟踪的方法和装置
公开(公告)号：US5745072A
公开(公告)日：1998-04-28
申请号：US717395
申请日：1996-09-20
CPC分类号： G01S13/765 , G01S13/58 , G01S13/60 , G01S7/003
摘要： A method and apparatus are disclosed for making precise velocity measurements of a spacecraft using a two-way noncoherent Doppler tracking system. By comparing the received uplink and transmitted downlink frequencies on-board the spacecraft, information is generated that is included in the downlink signal and used to cancel spacecraft oscillator drift rate effects in the two-way Doppler measurement made by the ground station. This data can also be used to characterize the drift rate of the spacecraft oscillator, thus permitting periods of accurate one-way Doppler tracking by the ground station.
摘要翻译： 公开了一种使用双向非相干多普勒跟踪系统对航天器进行精确速度测量的方法和装置。 通过比较航天器上接收到的上行链路和发射的下行链路频率，生成包含在下行链路信号中的信息，并用于取消由地面站进行的双向多普勒测量中的航天器振荡器漂移率效应。 该数据也可用于表征航天器振荡器的漂移速率，从而允许由地面站进行精确的单向多普勒跟踪的周期。
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