公开(公告)号：US20140294119A1

公开(公告)日：2014-10-02

申请号：US14304226

申请日：2014-06-13

Applicant: Comtech EF Data Corp.

Inventor： John Sochacki

IPC: H04B1/62 ,  H03F1/32

CPC classification number: H04B1/62 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H04B1/0475 ,  H04B2001/0425

Abstract: A method of generating Nth order product predistortion coefficients for use by a linearizer in a non-linear communications system comprising receiving an input signal by a processor, applying, by the processor, a frequency domain-based adaptation algorithm by measuring Nth order products of an output signal of the system and iteratively adjusting a predistortion coefficient of a predistorter until the Nth order product is substantially equal to a predetermined minimum value.

Abstract translation: 一种在非线性通信系统中产生由线性化器使用的N阶乘积预失真系数的方法，包括由处理器接收输入信号，由处理器应用基于频域的自适应算法，通过测量第 输出信号，迭代地调整预失真器的预失真系数，直到第N阶乘积基本上等于预定的最小值。

公开(公告)号：US20140177520A1

公开(公告)日：2014-06-26

申请号：US14193361

申请日：2014-02-28

Applicant: Comtech EF Data Corp.

Inventor： Wallace Davis ,  Tiberiu Artzi ,  Michael Beeler

IPC: H04B10/118 ,  H04L25/20

CPC classification number: H04B10/118 ,  H04B7/18517 ,  H04B7/2041 ,  H04L25/20

Abstract: A method of creating a pseudo hemispherical beam using a plurality of individual spot beams comprising receiving by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a QoS logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam has a unique center frequency and carrier signal configuration, and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers.

Abstract translation: 使用多个单独的点波束来创建伪半球形波束的方法，包括由单个路由器或分组处理器接收来自多个用户的用户数据，使用QoS逻辑由单个路由器或分组处理器处理用户数据，使得 包括多个数据结果队列的单个输出，每个数据队列包括仅被指定用于仅传送到一个或多个预定的远程接收器的数据，调制使用多载波调制器接收的多个数据队列，使得包括 导致多个单独的点波束，其中每个单独的点波束具有唯一的中心频率和载波信号配置，并且将多个单独的点波束发射到被配置为将每个单独的点波束传送到一个或多个预定的远程接收器的重复中继器 。

公开(公告)号：US20140161204A1

公开(公告)日：2014-06-12

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

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：US20130322576A1

公开(公告)日：2013-12-05

申请号：US13960625

申请日：2013-08-06

Applicant: Comtech EF Data Corp.

Inventor： Lazaro F. Cajegas, III

IPC: 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。 在NCO的中心频率下在CRL内设置数控振荡器（NCO），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 同时通过使用处理器运行FFT同时估计快速傅立叶变换（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，并且调整一个或多个参数 基于使用处理器的频偏的CRL。

公开(公告)号：US20160336968A1

公开(公告)日：2016-11-17

申请号：US14709283

申请日：2015-05-11

Applicant: Comtech EF Data Corp.

Inventor： Brian A. Banister

IPC: H03M13/11 ,  H04L1/00

CPC classification number: H04L1/0045 ,  H03M13/255 ,  H04L1/0041 ,  H04L1/0042 ,  H04L1/0058 ,  H04L1/007

Abstract: A method of data transmission and recovery over a communications channel comprising encoding, by an encoder, data using a forward error correction (FEC) code such that a plurality of encoded FEC frames results wherein each encoded FEC frame comprises a FEC codeword mapped to a plurality of symbols from a plurality of constellations, at least two of the constellations being different from one another, transmitting the encoded FEC frames across a communications channel using a transmitter, and decoding the received encoded FEC frames using a decoder at a receiver.

Abstract translation: 一种通过通信信道进行数据传输和恢复的方法，包括由编码器使用前向纠错（FEC）码来编码数据，使得多个经编码的FEC帧产生，其中每个编码的FEC帧包括映射到多个的FEC码字 来自多个星座的符号，至少两个星座彼此不同，使用发射机在通信信道上发送经编码的FEC帧，并且在接收机处使用解码器对接收到的编码FEC帧进行解码。

公开(公告)号：US20160056918A1

公开(公告)日：2016-02-25

申请号：US14834183

申请日：2015-08-24

Applicant: Comtech EF Data Corp.

Inventor： Richard M. Miller

IPC: H04L1/00 ,  H04L12/939

CPC classification number: H04L1/0041 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L27/34 ,  H04L2001/0097

Abstract: A redundancy system for co-channel telecommunications comprising a first modem comprising a premapped symbol interface (PMSI) ROM configured to produce a constellation point number (CPN) value for each transmitted symbol using FEC codewords and a modulation format, an encoder to produce three CPN value signals, and a first symbol clock to generate a timing signal for the data signal. The system further comprises a second modem comprising a PMSI ROM decoder to decode the CPN values from the received CPN value signals, an interface bus to transmit the three CPN value signals of the encoder and the timing signal from the first online modem to the second offline modem, and a redundancy switch to switch the input channel of data to a FEC encoder of the second modem and the output channel of received codewords to a FEC decoder of the first modem in response to a redundancy switching signal.

Abstract translation: 一种用于同信道电信的冗余系统，包括：第一调制解调器，包括被预先配置的符号接口（PMSI）ROM，其被配置为使用FEC码字和调制格式为每个发送的符号产生星座点数（CPN）值，编码器产生三个CPN 值信号和第一符号时钟，以产生数据信号的定时信号。 该系统还包括一个第二调制解调器，包括一个PMSI ROM解码器，用于从接收的CPN值信号中解码CPN值，一个接口总线，用于将编码器的三个CPN值信号和定时信号从第一个在线调制解调器传输到第二个离线 调制解调器和冗余切换器，以响应于冗余切换信号将数据的输入信道切换到第二调制解调器的FEC编码器和接收的码字的输出信道到第一调制解调器的FEC解码器。

公开(公告)号：US20160036585A1

公开(公告)日：2016-02-04

申请号：US14884699

申请日：2015-10-15

Applicant: Comtech EF Data Corp.

Inventor： Kasra Akhavan-Toyserkani ,  John Youssef

IPC: H04L9/06

CPC classification number: H04L9/0662 ,  H04L9/0631 ,  H04L2209/08 ,  H04L2209/12

Abstract: A method of simulating communication channel noise comprising generating, by a FPGA or ASIC, a stream of uniformly distributed random variables using a cryptographic algorithm, applying a mathematical transform to the uniformly distributed random variables using the FPGA or ASIC to create a signal comprised of normally distributed random variables, adjusting a mean and variance of the signal using the FPGA or ASIC, outputting, by the FPGA or ASIC, an output noise signal, adding, by the FPGA or ASIC, I and Q samples of the output noise signal to I and Q symbols of a data carrier signal at complex baseband, modulating, using a modulator, the summed I and Q symbols to create a composite carrier signal, and upconverting using an upconverter, the composite carrier signal for transmission across a telecommunications channel to simulate a noisy telecommunications channel.

Abstract translation: 一种模拟通信信道噪声的方法，包括使用加密算法由FPGA或ASIC生成均匀分布的随机变量流，使用FPGA或ASIC对均匀分布的随机变量应用数学变换，以创建包含正常信号的信号 分布式随机变量，使用FPGA或ASIC调整信号的均值和方差，由FPGA或ASIC输出输出噪声信号，由FPGA或ASIC将输出噪声信号的I和Q采样加到I 和复数基带上的数据载波信号的Q符号，使用调制器调制相加的I和Q符号以产生复合载波信号，以及使用上变频器进行上变频，所述复合载波信号用于跨电信信道传输以模拟 嘈杂的电信渠道。

公开(公告)号：US09124342B2

公开(公告)日：2015-09-01

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: H04B1/00 ,  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的发射机，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：US08897718B2

公开(公告)日：2014-11-25

申请号：US14271265

申请日：2014-05-06

Applicant: Comtech EF Data Corp.

Inventor： Vasile Manea ,  Michael Beeler ,  Frederick Morris ,  Jeffery Harig

IPC: H04B1/00 ,  H04B7/00 ,  H04W76/02 ,  H04W72/04 ,  H04B7/185 ,  H04L1/00 ,  H04W28/18 ,  H04W48/16 ,  H04W84/06

CPC classification number: H04W76/02 ,  H04B7/18515 ,  H04B7/18582 ,  H04L1/0003 ,  H04L1/0009 ,  H04W28/18 ,  H04W48/16 ,  H04W72/04 ,  H04W72/0406 ,  H04W76/10 ,  H04W84/06

Abstract: A method of provisioning a communications link between remote terminals within a hub-spoke network comprising receiving, by a first remote terminal, information about a second remote terminal from a hub, selecting, by the first remote terminal, a modulation factor, coding rate, symbol rate, center frequency, and power level based on the information received about the second remote terminal, transmitting, by the first remote terminal, a signal using at least one of the selected modulation factor, coding rate, symbol rate, center frequency, and power level, to the second remote terminal such that a communications link is created, and adjusting the modulation factor, coding rate, symbol rate, center frequency, or power level of the transmitted signal such that performance of the link is increased while maintaining a presence of the link.

公开(公告)号：US20140294048A1

公开(公告)日：2014-10-02

申请号：US14306076

申请日：2014-06-16

Applicant: Comtech EF Data Corp.

Inventor： Frederick Morris ,  Michael Beeler

IPC: H04B1/7097 ,  H04B7/15

CPC classification number: H04B1/707 ,  H04B1/7097 ,  H04B7/15 ,  H04B7/165 ,  H04B7/18515

Abstract: A communication method for transmitting meta-data through a meta-carrier signal comprising encoding meta-data using an encoder, the meta-data comprising information that identifies a repeating relay to which a spread meta-carrier signal is to be transmitted, encoded using an encoder, modulating, using a modulator and spreading, using a spreader, the encoded meta-data such that the spread meta-carrier signal results, and transmitting, by a transmitting device, the spread meta-carrier signal to the repeating relay wherein the repeating relay does not process or modify the spread meta-carrier signal, the spread meta-carrier signal being transmitted over at least a portion of a bandwidth of the repeating relay.

Abstract translation: 一种用于通过元载波信号发送元数据的通信方法，包括使用编码器对元数据进行编码，所述元数据包括识别扩展元载波信号将被发送到的重复中继的信息，所述元数据使用 编码器，调制，使用调制器和使用扩展器扩展编码的元数据，使得扩展元载波信号导致并由传输设备将扩展元载波信号发送到重复中继，其中重复 继电器不处理或修改扩展元载波信号，扩展元载波信号通过重复中继的带宽的至少一部分传输。