公开(公告)号：US20130177155A1

公开(公告)日：2013-07-11

申请号：US13781466

申请日：2013-02-28

Applicant: Comtech EF Data Corp.

Inventor： Kasra Akhavan-Toyserkani ,  John Youssef ,  Cris Mamaril

IPC: H04L9/28

CPC classification number: H04L9/0662

Abstract: A method of generating normally distributed random variables for communication channel simulation comprising generating, by a processor, a stream of uniformly distributed random variables using a cryptographic algorithm, applying a mathematical transform to the uniformly distributed random variables using the processor to create a signal comprised of normally distributed random variables, adjusting a mean and variance of the signal using the processor, and outputting, by the processor, an output noise signal.

Abstract translation: 一种生成用于通信信道模拟的正态分布随机变量的方法，其包括使用加密算法由处理器生成均匀分布的随机变量流，使用所述处理器对所述均匀分布的随机变量应用数学变换来创建包括 正态分布随机变量，使用处理器调整信号的均值和方差，并由处理器输出输出噪声信号。

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。