pseudo noise造句
例句與造句
- Pn pseudo noise
偽隨機噪聲 - We propose a new method of calculating the best threshold according to the characteristic of pn ( pseudo noise ) code
根據(jù)偽隨機碼的特性,提出了一種新的求取最佳檢測門限的方法。 - Secondly , we prove the self - relation function and correlation function of pseudo noise code sequence and obtain the shift register generating circuit from it ' s generating function
然后，通過偽碼的生成多項式，導(dǎo)出偽碼的移位寄存器生成電路，并分析了偽碼的自相關(guān)特性和互相關(guān)特性。 - We analyzed the anti - jam and band inside anti - interfere performance of the system , and the low probability intercept ( lpi ) of the traditional direct sequence spread spectrum ( dsss ) modulations in the uav platform ' s applications . so a new modulation technique using a multi - level pseudo noise ( pn ) code has been presented . the new multi - level pn code is built from a high speed pn code through a low passed filter ( lpf )
分析了系統(tǒng)抗阻塞式干擾和抗帶內(nèi)頻帶干擾的性能，以及常規(guī)bpsk qpsk - dsss調(diào)制在無人機通信中存在的安全隱患，提出了一種用多電平pn碼進行擴頻調(diào)制的方法：采用高速pn碼，經(jīng)過低通濾波器，產(chǎn)生多電平pn碼進行直序擴頻調(diào)制，能在低信噪比情況下有效抵抗平方率檢測器對系統(tǒng)載波的檢測。 - With the development of the electron and information technology , the blind de - spread of spread spectrum signals in non - cooperation communication has been a research hot spot . the blind detection and estimation of the chip rate and period of pseudo noise ( pn ) sequence are the precondition for the realization of blind de - spread
隨著電子戰(zhàn)和信息戰(zhàn)技術(shù)的發(fā)展,非合作通信條件下擴頻信號盲解擴成為擴頻通信領(lǐng)域的研究熱點,擴頻信號pn碼速率和碼周期的盲檢測和盲估計是實現(xiàn)盲解擴的前提。 - It's difficult to find pseudo noise in a sentence. 用pseudo noise造句挺難的
- After having estimated some signal parameters , it is an important approach to despread the dsss signal and recover the primitive information by estimating the spreading sequences . therefore the research on blind estimation of pn ( pseudo noise ) sequences shows the vital urgency and significance at present
在檢測和估計出直擴信號的參數(shù)后,要恢復(fù)原始信息,估計出擴頻序列是重要的途徑之一,因而對ds信號擴頻pn ( pseudonoise )碼的估計研究就具有迫切性和重要意義。 - After observing the correlative of pseudo noise code , we analyse the main cause of multi - access interference , and build the receiving model of multiuser system . in the thesis the optimum multiuser detectors with minimum probability of error and the near - optimum detectors are intrduced , and then pic multiuser detection is improved on
介紹了最佳多用戶檢測器和次最佳多用戶檢測器，并對現(xiàn)有一些并行干擾抵消多用戶檢測器進行了介紹并提出了改進的措施。對采用改進的算法的系統(tǒng)用montecarlo算法進行了誤碼性能分析。 - The author first analyzed spread spectrum technology that is used extensively in short - range wireless communications , and discussed some pseudo noise codes " application in spread spectrum technology . then it gave wireless transceiver ' s detailed block diagram in the physical layer . the author also introduced main chip ' s operating theory which is used in this system
本系統(tǒng)在無線收發(fā)部分采用dsss技術(shù)，工作在2 . 4ghzism頻段，本文首先介紹了在短距離無線通信中廣泛應(yīng)用的擴頻技術(shù)，討論了幾種偽隨機碼在擴頻通信中的應(yīng)用，然后給出了本系統(tǒng)中物理層所用的硬件電路的框圖，介紹了所用芯片組的原理。 - The generating programs of m series and band - limited pn ( pseudo noise ) series are designed based on the research of correlative arithmetic . according to the testing principle and parameter characteristic of echo signal , decimation filter and digital correlator group are provided . the function of target detection and speed measurement is also provided in dsp software
在研究相關(guān)算法的基礎(chǔ)上,開發(fā)了m序列和帶限pn序列的產(chǎn)生程序;根據(jù)回波信號的檢測原理及其參數(shù)特性,設(shè)計了選抽濾波器和數(shù)字相關(guān)器組,并在dsp軟件中實現(xiàn)了目標檢測和測速功能。