pseudo-random sequence 中文意思是什麼
pseudo-random sequence
解釋
偽隨機序列-
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噪聲調相干擾、偽隨機碼噪聲干擾、多假目標干擾。 -
Frequency code is not uniformity distribution and keeps to a probability distribution function defined by the spectral characteristics of the target of interest. the phase code is equally duality pseudo - random sequence and used to reduced the sidelobes of the signal correlation function. and the mismatch - phase sequence is corresponding with the frequency sequence one by one
而頻率編碼為不均勻分佈，由所觀測目標的頻譜信息提取出概率密度函數決定頻率編碼序列的分佈；相位編碼為二元的偽隨機序列，採取均勻的二相編碼，消減同頻脈沖帶來的過高的相關函數的旁瓣；而失配相位為與頻率編碼相一一對應于各子脈沖中。 -
But modern electronic counterwork technic could exactly estimate the carrier frequency, signal period, even the pseudo - random ( pn ) sequence itself of direct sequence spread spectrum ( dsss ). it is urgency to investigate a new dsss to achieve lower probability of detection ( lpd ) and higher anti - jamming
然而現代電子對抗技術可以準確估計直接序列擴頻通信的載波頻率、符號周期甚至擴頻碼本身，為達到更低截獲率和更高抗干擾的通信目的，必須研究新的直擴通信技術。 -
Investigation and realigation of pseudo - random sequence generator
偽隨機序列發生器的研究與實現 -
Represents a pseudo - random number generator, a device that produces a sequence of numbers that meet certain statistical requirements for randomness
表示偽隨機數生成器，一種能夠產生滿足某些隨機性統計要求的數字序列的設備。 -
In the part of voice encryption, spatiotemporal chaotic system ( ocoml model ) and lfsr are used to generate multidimensional pseudo - random sequence. this sequence has a longer period, better randomicity, passing the verification of fips 140 - 2 security requirements. using the key stream generated by it to encrypt the voice gets a better security
在語音加密方面，本文利用時空混沌系統（單向耦合映象格子模型）與線性移位寄存器產生了高維的偽隨機序列，該序列周期很長，具有更強的隨機性，通過了fips140 - 2的安全性能驗證，利用其作為密鑰流對語音信號進行加密，獲得了更高的保密性。 -
This paper is focused on images watermarking algorithms. watermark casting operates in frequency domain, embeds pseudo - random sequence of real number in selected coefficients without image degradation. a blind watermark retrieval technique that can detect the embedded watermark without resorting the original image is proposed, so that the proposed techniques represents a major improvements to those relying on the comparison between the watermarked and original image, which is not practical for a huge image database
本文主要研究針對圖像水印系統的演算法研究，採用偽隨機序列作為水印信號，利用變換域系數作為水印的載體，在不降低圖像質量的前提下達到嵌入水印的目的，在恢復水印的過程中無需原始圖像的參與，相比較那些需要利用原始圖像恢復數據的系統，文中所提出的方案更具有實用性。 -
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裡得到他的數字（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測序列中的數字。 -
( 2 ) a new digital frequency - hopping communication system based on cipher - quasi - chaotic sequence is proposed, which combines the cryptography and frequency - hopping technology. the system ' s protocol, base - band signal processing and modulation / demodulation algorithms of the radio - frequency part are designed, and the hardware experiment conducted on a prototype of the system show that the system functions well. the finite precision problem arising while taking use of chaotic signal to generate pseudo - random sequence is studied and the anti - tracking capability of the cipher - quasi - chaotic sequence is studied with the volterra - tls method proposed in this dissertation
（ 2提出一種新的基於密碼準混飩序列的密碼與跳頻技術相結合的跳頻通信系統，並且進行了協議部分、拂信號處聊分、射頻調制解調演算法部分的模擬研究和系統的硬體實驗研究；研究了利用混飩信號產生偽隨機序列的有限精度實現問題，利用本文提出的m業肚m 113方法對密碼準混飩序列產生的跳頻碼的抗鵬干擾能力進行了模擬實驗研究。 -
In this paper we adopt pseudo - random sequence or gray level image as the watermark, choose the dwt coefficients as the carrier, then embed the watermark into the carrier imperceptually. one algorithm accomplishes blind extracting. it presents a symmetric algorithm based on shuffling technique
採用偽隨機序列或灰度圖像作為水印信號，利用dwt變換系數作為水印的載體，在不降低圖像質量的前提下達到嵌入水印的目的，部分方案在恢復水印的過程中無需原始圖像的參與。 -
Use the high - quality pseudo - random sequence to create pseudo - random fsk / psk signal ; 3
用產生的高質量偽隨機數設計偽隨機fsk / psk信號； 3 -
With the development of the modern electronic counterwork techniques, the estimate of the carrier frequency, signal period, and even the pseudo - random ( pn ) sequence itself of direct sequence spread spectrum ( dsss ) is possible
隨著現代電子對抗技術的發展使得估計直接序列擴頻通信的載波頻率、符號周期甚至擴頻碼本身變為可能。 -
Prbs pseudo - random binary sequence
偽隨機二進制序列 -
Pseudo random binary sequence
偽隨機二元序列 -
Many researches have been done to create pseudo - random binary sequence which can be a substitute of conventional sequence
但傳統序列存在數量少，周期短等缺點，使通信系統性能不盡如人意。 -
One method is to embed the watermarking signal of pseudo - gauss random sequence into the low frequency sub band of dwt domain by analyzing both the distribution of the signal energy and the influence of the image disposal
一是通過對圖像小波變換后圖像能量的分佈以及圖像處理對各小波子圖影響的分析，提出將高斯水印嵌入到小波變換的逼近子圖中。 -
Chapter six studies characteristics and implementations of pseudo - random sequence generator and data scrambling, and fulfills the de - scrambling function with asic
第六章討論了偽隨機序列和數據擾碼的特點，並給出了其asic實現方案。 -
Algorithm and design for pseudo - random sequence ultrasonic spread spectrum distance measurement system
偽隨機碼超聲擴頻測距系統設計與演算法 -
In former method, the watermark is usually the pseudo - random sequence
以往研究的水印多為無意義的水印，例如一個隨機數。 -
In the part of image encryption, chaotic map based on kolmogorov flow is used to permute. changing the traditional stream - cipher, new chaotic pseudo - random sequence generator based on the theory of product cipher is presented to substitute the pixel. based on it, linear map to confuse the pixel is presented further, withstanding statistical attack
在圖像加密方面，採用基於kolmogorovflows的混沌映射對圖像進行置亂，對傳統流加密進行改造，提出了基於乘積密碼理論的新型混沌偽隨機序列發生器完成象素的混淆，並在此基礎上進一步採用線性映射對象素進行擴散以抵抗統計攻擊。
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