公开(公告)号：US08976842B1

公开(公告)日：2015-03-10

申请号：US13865394

申请日：2013-04-18

Applicant: Comtech EF Data Corp.

Inventor： Lianfeng Peng

IPC: H04B1/00 ,  H04B1/7073 ,  H04B1/709

CPC classification number: H04B1/7073 ,  H04B1/709

Abstract: A method of detecting PN code synchronization for a DSSS signal comprising receiving a DSSS data signal of data frames comprised of I and Q symbols, at least a portion of each data frame comprising a unique word, demodulating the data signal into I and Q chip samples, filtering the I and Q chip samples and outputting the filtered I and Q chip samples to a chip stream controller which outputs the plurality of chip streams to a correlation matrix that correlates the plurality of chip streams with the chipped unique word and outputs a correlated data stream. A plurality of FFTs is run on the correlated output data stream and a processor searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power of each FFT. A PN synchronization detector searches for a maximum frequency bin power among the plurality of FFT rounds and determines whether PN synchronization is present.

Abstract translation: 一种检测DSSS信号的PN码同步的方法，包括接收由I和Q符号组成的数据帧的DSSS数据信号，每个数据帧的至少一部分包括唯一字，将数据信号解调为I和Q码片样本 对I和Q芯片样本进行滤波并将滤波后的I和Q码片样本输出到芯片流控制器，芯片流控制器将多个芯片流输出到相关矩阵，该相关矩阵将多个芯片流与切片唯一字相关，并输出相关数据 流。 在相关的输出数据流上运行多个FFT，并且处理器搜索每个FFT的最大频率仓功率。 PN同步检测器搜索每个FFT的最大频率仓功率。 PN同步检测器在多个FFT轮次之间搜索最大频率仓功率，并确定是否存在PN同步。

公开(公告)号：US08964811B2

公开(公告)日：2015-02-24

申请号：US14183413

申请日：2014-02-18

Applicant: Comtech EF Data Corp.

Inventor： Michael Beeler ,  Cris M. Mamaril ,  Jeffery Harig

IPC: H04B1/00 ,  H04B1/7103 ,  H04L27/00

CPC classification number: H04B1/7103 ,  H04L27/0006

Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.

Abstract translation: 一种用于识别电子传输的存在的方法，包括由检测装置检测由原始载波信号的存在产生的电磁能量的突发的存在，并由发射装置发射扩频元载波 信号在原始载波信号的带宽的一部分内，其中元载波信号包含关于原始载波信号的信息，并且被传输，使得元载波信号占据原载波信号的带宽的至少一部分 存在电磁能量的爆发。

公开(公告)号：US08913647B2

公开(公告)日：2014-12-16

申请号：US14253653

申请日：2014-04-15

Applicant: Comtech EF Data Corp.

Inventor： Michael Beeler ,  Frederick Morris ,  Cris Mamaril ,  Jeffery Harig ,  Richard Hollingsworth Cannon ,  Brian Banister

IPC: H04B1/00 ,  H04B1/707 ,  H04B1/7097 ,  H04L27/34

CPC classification number: H04B1/707 ,  H04B1/7097 ,  H04L27/3488

Abstract: A method of receiving and reassembling non-sequential meta-data information embedded within an original burst carrier signal that receives multiple composite burst carrier signals each with an original burst carrier signal and a meta-carrier signal, wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original burst carrier signal and includes one or more bits of meta-data information of a meta-data message about the original burst carrier signal that is non-contiguous in reference to a temporal order in which the meta-data information is received, detecting a DSSS spreading sequence and extracting the meta-carrier signals from the composite burst carrier signals, determining a phase progression of the meta-carrier signals based on a PRN spreading code, and reassembling the one or more bits of meta-data information from each meta-carrier signal into a sequential order after an entire meta-data message is received and extracted.

Abstract translation: 一种接收和重新组合嵌入在原始突发载波信号内的非连续元数据信息的方法，其接收每个具有原始突发载波信号和元载波信号的多个复合突发载波信号，其中，所述元载波信号占据至少 参考原始突发载波信号的带宽的一部分并且包括关于原始突发载波信号的元数据消息的元数据信息的一个或多个比特，该元数据消息是参考时间顺序而不连续的， 接收数据信息，检测DSSS扩展序列并从复合突发载波信号中提取元载波信号，基于PRN扩展码确定元载波信号的相位进程，并重新组合元数据的一个或多个位 在接收和提取整个元数据消息之后，将每个元载波信号的数据信息转换为顺序。

公开(公告)号：US08849193B2

公开(公告)日：2014-09-30

申请号：US13661632

申请日：2012-10-26

Applicant: Comtech EF Data Corp.

Inventor： Mark Dale

IPC: H04B7/185 ,  H04W52/16 ,  H04B17/00 ,  H04W52/24

CPC classification number: H04W52/16 ,  H04B17/391 ,  H04W52/241

Abstract: A method of transmitting telecommunications data comprising modulating first and second data signals, selecting transmit powers first and second terminals to achieve a predetermined power equivalent bandwidth (PEB) through an un-attenuated, transmitting the first data signal to the second terminal and the second data signal to the first terminal through a remote receiver, measuring a total received signal-to-noise ratio of the first and second data signals and a total received signal-to-noise ratio received at the second and first terminals, respectively, measuring a signal-power density ratio between the first and second signals, determining a ratio of excess uplink to downlink losses based a rain model parameter and operating frequency, calculating excess uplink and downlink losses relative an optimized, un-attenuated telecommunications channel, and changing a transmit power of a terminal such that the predetermined PEB is maintained when at least one of the signals experiences attenuation.

Abstract translation: 一种发送电信数据的方法，包括调制第一和第二数据信号，选择发射功率第一和第二终端，以通过未衰减的方式实现预定功率等效带宽（PEB），将第一数据信号发送到第二终端和第二数据 通过远程接收器向第一终端发送信号，分别测量第一和第二数据信号的总接收信噪比和在第二和第一终端接收的总接收信噪比，测量信号 第一和第二信号之间的功率密度比，基于雨模型参数和运行频率来确定上行链路与下行链路损耗之间的比率，相对于优化的未衰减的电信信道来计算过量的上行链路和下行链路损耗，以及改变发射功率 使得当至少一个信号经历衰减时，保持预定的PEB 估计。

公开(公告)号：US08842783B2

公开(公告)日：2014-09-23

申请号：US13960625

申请日：2013-08-06

Applicant: Comtech EF Data Corp.

Inventor： Lazaro F. Cajegas, III

IPC: H04L27/06 ,  H04B1/06

CPC classification number: H04B1/06 ,  H04L27/0014 ,  H04L27/38 ,  H04L2027/0046 ,  H04L2027/0057 ,  H04L2027/0065 ,  H04L2027/0079

Abstract: A method of accelerated carrier signal acquisition for a digital communication receiver, the method comprising receiving a carrier signal by a receiver comprising a carrier recovery loop (CRL), setting the CRL to an open loop setting using a processor, setting a numerically controlled oscillator (NCO) within the CRL at a center frequency of the NCO, determining, by the processor, one or more initial parameters of the CRL, calculating an estimate and polarity for a sign frequency detection frequency using a sign frequency detector while simultaneously estimating a Fast Fourier Transform (FFT) frequency by running an FFT using the processor, comparing polarities of the estimates of the sign frequency detection frequency and FFT frequency and determining a frequency offset using the processor, and adjusting one or more parameters of the CRL based on the frequency offset using the processor.

Abstract translation: 一种用于数字通信接收机的加速载波信号采集的方法，所述方法包括由包括载波恢复环路（CRL）的接收机接收载波信号，使用处理器将CRL设置为开环设置，设置数控振荡器 NCO），在NCO的中心频率下，由处理器确定CRL的一个或多个初始参数，使用符号频率检测器计算符号频率检测频率的估计和极性，同时估计快速傅里叶 通过使用处理器运行FFT来变换（FFT）频率，比较符号频率检测频率和FFT频率的估计的极性，并使用处理器确定频率偏移，并且基于频率偏移来调整CRL的一个或多个参数 使用处理器。

公开(公告)号：US20140273812A1

公开(公告)日：2014-09-18

申请号：US14288238

申请日：2014-05-27

Applicant: COMTECH EF DATA CORP.

Inventor： Michael Beeler ,  Jeffery Harig ,  Wallace Davis ,  Frederick Morris ,  Cris Mamaril

IPC: H04B7/185

CPC classification number: H04B7/18513 ,  H04B7/18515 ,  H04B7/18528 ,  H04B7/18543

Abstract: A method for remotely and dynamically controlling adjacent satellite interference comprising monitoring one or more off-axis signals emitted by one or more remote transmitters; determining whether one or more of the off-axis signals is creating adjacent satellite interference (ASI), off axis emissions and inband interference that is higher than a predetermined level of acceptable interference, and transmitting a control signal to at least one of the one or more remote transmitters in response to the determination that the one or more off-axis signals is creating interference that is higher than the predetermined level of acceptable interference, the control signal initiating an adjustment to one or more transmission parameters of the one or more remote transmitters such that interference resulting from the one or more off-axis signals emitted by the one or more remote transmitters is reduced or eliminated.

Abstract translation: 一种用于远程和动态地控制相邻卫星干扰的方法，包括监视由一个或多个远程发射机发射的一个或多个离轴信号; 确定离轴信号中的一个或多个是否产生比预定水平的可接受的干扰高的相邻卫星干扰（ASI），离轴发射和带内干扰，以及将控制信号发送到所述一个或多个 响应于确定所述一个或多个离轴信号正在产生高于所述可接受干扰的预定水平的干扰的更远端发射机，所述控制信号启动对所述一个或多个远程发射机的一个或多个传输参数的调整 使得由一个或多个远程发射机发射的一个或多个离轴信号产生的干扰减少或消除。

公开(公告)号：US08837627B2

公开(公告)日：2014-09-16

申请号：US14183339

申请日：2014-02-18

Applicant: Comtech EF Data Corp.

Inventor： Richard Hollingsworth Cannon ,  Louis Dubin ,  Cris Mamaril

IPC: H04B15/00 ,  H04B7/185

CPC classification number: H04B15/00 ,  H04B7/18526

Abstract: A method of reducing signal correlation in a symmetrical adaptive canceller link comprising spectrally inverting one of a first carrier signal and a second carrier signal by causing a spectral inversion of one of the first and second carrier signals using a modulator, transmitting the first and second carrier signals within a bandwidth to a remote receiver using a transmitting device such that a composite carrier signal results, and cancelling at least one of the first carrier signal from the composite carrier signal using a cancellation technique such that the second carrier signal results on one end of the link and the second carrier signal from the composite carrier signal using a cancellation technique such that the first carrier signal results on the opposite end of the link.

Abstract translation: 一种降低对称自适应消除器链路中的信号相关性的方法，包括使用调制器对所述第一载波信号和所述第二载波信号之一进行频谱反转，以使第一和第二载波 在使用发射设备的远程接收机的带宽内的信号，使得复合载波信号结果，并且使用消除技术从复合载波信号中消除第一载波信号中的至少一个，使得第二载波信号导致 来自复合载波信号的链路和第二载波信号，使用消除技术，使得第一载波信号导致链路的相对端。

公开(公告)号：US20140241466A1

公开(公告)日：2014-08-28

申请号：US14268097

申请日：2014-05-02

Applicant: Comtech EF Data Corp.

Inventor： Lazaro F. Cajegas, III

IPC: H04L27/227 ,  H04L27/00

CPC classification number: H04L27/2271 ,  H04L27/0014 ,  H04L2027/0026

Abstract: A method of rapid non-data aided carrier signal acquisition for a low symbol rate carrier signal, comprising receiving and converting an analog intermediate frequency carrier to a digital carrier signal, down-converting the signal to substantially baseband, reducing a sampling rate of the digital carrier signal using a decimation filter, determining a highest Fast Fourier Transform (FFT) based on a result of one or more FFT's generated by an FFT module using a peak finder, selecting an input source for the FFT module using a multiplexer, generating a frequency estimate of the digital carrier signal using a walking coarse detector, tuning a carrier recovery loop (CRL) based on the frequency estimate generated by the walking coarse detector, determining a final carrier frequency offset estimate using a result of the FFT module, modulation removal, and the peak finder, and programming an oscillator within the CRL to the final carrier frequency offset estimate.

Abstract translation: 一种用于低符号速率载波信号的快速非数据辅助载波信号采集方法，包括接收模拟中频载波并将其转换为数字载波信号，将信号下变频为基带，降低数字 使用抽取滤波器的载波信号，基于使用峰值寻找器的FFT模块生成的一个或多个FFT的结果来确定最高的快速傅里叶变换（FFT），使用多路复用器选择用于FFT模块的输入源，生成频率 使用行走粗略检测器估计数字载波信号，基于由步行粗略检测器生成的频率估计来调整载波恢复环路（CRL），使用FFT模块的结果确定最终载波频率偏移估计，调制去除， 和峰值寻找器，并将CRL内的振荡器编程为最终载波频率偏移估计。

公开(公告)号：US20140226696A1

公开(公告)日：2014-08-14

申请号：US14253653

申请日：2014-04-15

Applicant: Comtech EF Data Corp.

Inventor： Michael Beeler ,  Frederick Morris ,  Cris Mamaril ,  Jeffery Harig ,  Richard Hollingsworth Cannon ,  Brian Banister

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B1/7097 ,  H04L27/3488

Abstract: A method of embedding and transmitting a meta-data message in an original burst carrier signal for message reassembly comprising spreading a meta-carrier signal using a Direct Sequence Spread Spectrum (DSSS) spreading code having a Pseudo-Random Noise (PRN) spreading code sequence, the meta-carrier signal comprising one or more bits of meta-data information about the original burst carrier signal, lowering a power spectral density of the meta-carrier signal using the PRN spreading code such that interference with the original signal is reduced, combining the original burst carrier and the meta-carrier signals using a modulator such that a composite burst carrier signal results wherein the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier, and transmitting the composite burst carrier using a transmitter over a telecommunications channel in which only one burst carrier signal is expected to be present within a predetermined frequency bandwidth at a point in time.

Abstract translation: 一种在原始突发载波信号中嵌入和传输元数据消息用于消息重组的方法，包括使用具有伪随机噪声（PRN）扩展码序列的直接序列扩频（DSSS）扩展码扩展元载波信号 元载波信号包括关于原始突发载波信号的一个或多个元数据信息比特，使用PRN扩展码降低元载波信号的功率谱密度，使得与原始信号的干扰减少，组合 使用调制器的原始突发载波和元载波信号，使得复合突发载波信号导致元载波信号占据原始载波的带宽的至少一部分，并且使用发射机发射复合突发载波 其中预期在一个预定频率带宽内仅存在一个突发载波信号的电信信道 int在时间。

公开(公告)号：US08686800B2

公开(公告)日：2014-04-01

申请号：US13676011

申请日：2012-11-13

Applicant: Comtech EF Data Corp.

Inventor： Cris Mamaril ,  Tiberiu Artzi ,  Terry Richmond

IPC: H03B1/00

CPC classification number: H03B28/00

Abstract: A system for generating a frequency reference signal comprising an oscillator, a direct digital synthesizer coupled to the oscillator and configured to receive a signal output from the oscillator, a digital to analog converter coupled to the direct digital synthesizer and configured to receive a sampled signal from the direct digital synthesizer and to convert the sampled signal to an analog waveform, and a bandpass filter coupled to the digital to analog converter and configured to select an aliased output signal from the digital to analog converter at a Nyquist zone other than a first Nyquist zone and to output the frequency reference signal.

Abstract translation: 一种用于产生频率参考信号的系统，包括振荡器，耦合到振荡器并被配置为接收从振荡器输出的信号的直接数字合成器，耦合到直接数字合成器的数模转换器，并且被配置为从 所述直接数字合成器并将所述采样信号转换为模拟波形，以及耦合到所述数模转换器的带通滤波器，并且被配置为在除奈奎斯特区以外的奈奎斯特区选择来自所述数模转换器的混叠输出信号 并输出频率参考信号。