In chapter 5 the jamming such as phase modulation noise , binary pseudo random sequence and multiple pseudo targets are discussed 第五章對雷達干擾進行了闡述,主要的干擾信號有連續(xù)噪聲調(diào)相干擾、偽隨機碼噪聲干擾、多假目標(biāo)干擾。
This scheme can also adapt ds / dmpsk modulation and demodulation with different base data rate , different pseudo random codes and different intermediate frequency 該方案可以適應(yīng)不同基帶數(shù)據(jù)速率、不同偽隨機碼和不同中頻的ds / dmpsk的調(diào)制和解調(diào)。
Because the pseudo random numbers are periodic and predictable , in the field of encryption , we must choose the unpredictable , truly random numbers to guarantee the security of the information 由于偽隨機數(shù)是有規(guī)律可循的;因此在加密領(lǐng)域,就必須應(yīng)用不可預(yù)測的真隨機數(shù)來保證信息安全。
In this paper , we use computer to generate pseudo random number and low - discrepancy sequences . on this foundation , monte carlo integration and quasi - monte carlo integration are researched 摘要在本文中,我們利用計算機分別產(chǎn)生了偽隨機數(shù)序列和低差異數(shù)序列。在此基礎(chǔ)上,我們研究了蒙特卡羅積分與擬蒙特卡羅積分。
If we knew where walking fish is getting his numbers from , and they turned out to he pseudo random , and if he gave us a big enough sample , in theory we could try to predict the numbers in the sequence 如果我們知道散步魚從哪里得到他的數(shù)字(號碼) ,而且被證明是假隨機的,而且如果他可以給我們足夠的例子,理論上我們就可以預(yù)測序列中的數(shù)字。
In this paper , a sheet metal assembly is as to the study object . msc / patran is used to modeling , calculating , and analyzing . the assembly variation is calculated using finite element method and pseudo random numbers which are produced by number theoretic method 本文以金屬薄板為研究對象,利用有限元軟件msc / patran對其進行建模、計算與分析,利用數(shù)論方法產(chǎn)生的偽隨機點與有限元法相結(jié)合計算薄壁件的裝配公差。
This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga . this scheme adopts quadrature balanceable modulation , intermediate frequency sampling , digital matched filtering , delay differential demodulation techniques and so on . it directly processes the digital signals on intermediate frequency without down - conversion , and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits 本文采用了一種基于fpga的通用數(shù)字調(diào)制解調(diào)方案,該方案在調(diào)制端采用了正交平衡調(diào)制技術(shù),在解調(diào)端采用了中頻帶通采樣、數(shù)字匹配濾波、延時差分解調(diào)等技術(shù),直接在中頻上進行數(shù)字信號處理,不需要進行下變頻,也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。