公开(公告)号：EP2979386A1

公开(公告)日：2016-02-03

申请号：EP14791265.3

申请日：2014-05-02

Applicant: Comtech EF Data Corp.

Inventor： CAJEGAS, Lazaro, F.

IPC: H04L1/20 ,  H04L27/22

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.

公开(公告)号：EP2908456A1

公开(公告)日：2015-08-19

申请号：EP15154392.3

申请日：2015-02-09

Applicant: Comtech EF Data Corp.

Inventor： Beeler, Michael ,  Manea, Vasile ,  Bolick, Joshua

IPC: H04L1/00 ,  H04B7/185

CPC classification number: H04L1/0003 ,  H04B7/18543 ,  H04B7/18578 ,  H04L1/0009 ,  H04L1/0015

Abstract: A method of optimizing a link budget analysis (LBA) for a link comprising performing a first LBA based on a target modulation and coding pair (MODCOD) based on one or more link parameters, the MODCOD having a predetermined symbol energy to noise density ratio (Es/No), calculating a ratio of allocated bandwidth to a power equivalent bandwidth (PEB) for the link and converting the ratio to Decibels, determining whether additional energy is present by summing the Es/No for the link at the target MODCOD and the calculated ratio of allocated bandwidth to PEB, accessing a look up table to determine an optimal MODCOD for the link wherein if the sum is a positive value, selecting a MODCOD having a higher Es/No and if the sum is a negative value, selecting a MODCOD having a lower Es/No and altering one or more transmission or receiving parameters to apply the selected optimal MODCOD.

Abstract translation: 一种优化用于链路的链路预算分析（LBA）的方法，包括基于一个或多个链路参数基于目标调制和编码对（MODCOD）执行第一LBA，所述MODCOD具有预定的符号能量 - 噪声密度比（ Es / No），计算分配的带宽与链路的功率等效带宽（PEB）的比率并将比率转换为分贝，通过对目标MODCOD中的链路的Es / No求和来确定是否存在附加能量， 计算出的分配带宽与PEB的比率，访问查找表以确定链路的最佳MODCOD，其中如果该和为正值，则选择具有较高Es / No的MODCOD，以及如果该和为负值，则选择一个 具有较低Es / No的MODCOD并且改变一个或多个传输或接收参数以应用所选择的最佳MODCOD。

公开(公告)号：EP2724474A4

公开(公告)日：2015-08-12

申请号：EP12815478

申请日：2012-07-18

Applicant: COMTECH EF DATA CORP

Inventor： BEELER MICHAEL ,  CANNON RICHARD HOLLINGSWORTH

IPC: H04B7/185

CPC classification number: H04B7/18513

公开(公告)号：EP2767015A4

公开(公告)日：2015-07-15

申请号：EP12839390

申请日：2012-10-10

Applicant: COMTECH EF DATA CORP

Inventor： DAVIS WALLACE ,  BEELER MICHAEL

IPC: H04L1/00 ,  H04L5/00

CPC classification number: H04L5/0046 ,  H04B7/18528 ,  H04L1/0003 ,  H04L1/0009 ,  H04L2001/0097

公开(公告)号：EP2719134A2

公开(公告)日：2014-04-16

申请号：EP12801165.7

申请日：2012-06-12

Applicant: Comtech EF Data Corp.

Inventor： CANNON, Richard, Hollingsworth ,  DUBIN, Louis ,  MAMARIL, Cris

IPC: H04L25/02 ,  H04L27/00

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.

公开(公告)号：EP2715967A2

公开(公告)日：2014-04-09

申请号：EP12799931.6

申请日：2012-05-22

Applicant: Comtech EF Data Corp.

Inventor： AKHAVAN-TOYSERKANI, Kasra ,  RIPPLE, Andrew ,  BEELER, Michael ,  MAMARIL, Cris

IPC: H04L9/00 ,  H04L27/00

CPC classification number: H04K1/02

Abstract: A method for encrypting an information carrier comprising generating a sequence of data using a sequence generator, modulating, using a first modulator an output from the sequence generator such that an interference signal results, encoding the interference generator's synchronization information using an encoder, modulating, using a second modulator, the encoded synchronization information such that a synchronization carrier signal results, spreading the synchronization carrier signal using a spreader such that a spread sub-carrier synchronization signal results, and combining the modulated information carrier signal, interference signal, and spread sub-carrier synchronization signal using a signal combiner such that a composite signal results, the interference signal having one or more signal characteristics that results in obfuscation of the information carrier signal when the information carrier signal and interference signal are combined.

公开(公告)号：BR112013015370A2

公开(公告)日：2016-09-20

申请号：BR112013015370

申请日：2012-02-06

Applicant: COMTECH EF DATA CORP

Inventor： MAMARIL CRIS ,  MORRIS FREDERICK ,  HARIG JEFFREY ,  BEELER MICHAEL

IPC: H04B1/69 ,  H04L27/34

公开(公告)号：EP2957077A1

公开(公告)日：2015-12-23

申请号：EP14751701.5

申请日：2014-02-12

Applicant: Comtech EF Data Corp.

Inventor： CHINTADA, Lakshmana ,  MCCOLLUM, Jason

IPC: H04L12/70

CPC classification number: H04L69/04 ,  H04L69/16 ,  H04L69/22

Abstract: A method of reducing packet loss resulting from header compression during data transmission comprising of calculating, by a transmitter, the difference between one or more delta fields of each packet among a plurality of packets and a base frame of data wherein for at least a portion of the packets, the base frame is a packet other than a packet immediately preceding the packet for which the difference is calculated, encoding the difference and compressing the plurality of packets using the transmitter; transmitting, using the transmitter, the plurality of compressed packets and an uncompressed full-header packet through a communications channel to a receiver, receiving the plurality of compressed packets and the uncompressed full-header packet by the receiver, and decompressing, by the receiver, the plurality of compressed packets using the difference between the one or more delta fields of each packet among the plurality of compressed packets and the base frame.

公开(公告)号：EP2727306A4

公开(公告)日：2014-11-12

申请号：EP12803741

申请日：2012-06-28

Applicant: COMTECH EF DATA CORP

Inventor： BEELER MICHAEL ,  MORRIS FREDERICK ,  MAMARIL CRIS ,  HARIG JEFFREY ,  CANNON RICHARD HOLLINGSWORTH ,  BANISTER BRIAN A

IPC: H04L29/00 ,  H04B1/707 ,  H04L27/34

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

公开(公告)号：EP2772106A1

公开(公告)日：2014-09-03

申请号：EP12843631.8

申请日：2012-10-26

Applicant: Comtech EF Data Corp.

Inventor： DALE, Mark

IPC: H04W52/24

CPC classification number: H04W52/16 ,  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 (FEB) 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 FEB is maintained when at least one of the signals experiences attenuation.