例句與造句

1. The arithmetic formulas for sine wave , linear frequency modulation signal , v - style frequency modulation signal , white noise signal , reverberation signal and echo signal are given by their definition
   根據(jù)信號(hào)類型的定義,給出了正弦信號(hào)、線性調(diào)頻信號(hào)、 v型調(diào)頻信號(hào)、白噪聲、混響和回波信號(hào)的合成公式。
2. Briefly , here are main topics of this dissertation : ( 1 ) the relation between the resolving power of the linear frequency modulated continuous wave radar and the linearity of linear frequency modulation signal
   同樣，輸出數(shù)據(jù)也可以通過(guò)雙口ram和pci接口輸出。本文的主要工作包括： （ 1 ）介紹了線性調(diào)頻雷達(dá)距離分辨力和調(diào)頻線性度的關(guān)系。
3. Large time - band product signals such as linear frequency modulation signals ( lfm ) , nonlinear frequency modulation signals ( nlfm ) , phase coded signals and so on are one of key technologies for pulse compression radar systems
   具有大時(shí)寬帶寬積的信號(hào)，如線性調(diào)頻信號(hào)、非線性調(diào)頻信號(hào)、相位編碼信號(hào)等是雷達(dá)應(yīng)用脈沖壓縮技術(shù)的關(guān)鍵之一。
4. In this dissertation the pulse compression performances of linear frequency modulation signals ( lfm ) and the algorithm of mti / mtd are analyzed . programme and its optimization of them based on 2 pieces of adsp - ts203 are introduced in detail
   全文主要分析了線性調(diào)頻信號(hào)( lfm )的頻域脈沖壓縮方法及mti / mtd的算法;詳細(xì)介紹了基于兩片ts203的脈沖壓縮和mti / mtd的程序設(shè)計(jì)及其優(yōu)化。
5. At first , this paper gives an overall introduction to the basic theories of matching filter and the properties of linear frequency modulation signal , preprocessing the radar data by the matching filter will give advantage to improve the compression performance in later processes
   本文首先介紹了匹配濾波理論和線性調(diào)頻信號(hào)的性質(zhì)，并采用匹配濾波方法對(duì)雷達(dá)回波預(yù)處理，以利于后續(xù)壓縮處理過(guò)程提高壓縮性能。
6. It's difficult to find frequency modulation signal in a sentence. 用frequency modulation signal造句挺難的
7. Pulse compression technique and large timeband product signals such as linear frequency modulation signals , nolinear frequency modulation signals , phase coded signals and so on are widely used in modern radar systems to improve the resolving power both in range and in speed domain
   現(xiàn)代雷達(dá)為了提高雷達(dá)作用距離和速度分辨力、距離分辨力，廣泛采用了脈沖壓縮技術(shù)及大時(shí)寬帶脈壓信號(hào)如：線形調(diào)頻、非線形調(diào)頻、相位編碼信號(hào)等。
8. Pulse compression technique is widely used in modern radar systems . it solves the contradiction between the range and velocity resolution . large time - bandwidth product signals such as linear frequency modulation signals ( lfm ) are used in pulse compression technique to improve the resolution in range domain
   現(xiàn)代雷達(dá)系統(tǒng)廣泛采用脈沖壓縮技術(shù),在確保雷達(dá)作用距離和速度分辨力的前提下,采用大時(shí)帶積脈沖壓縮信號(hào):如線性調(diào)頻( lfm )信號(hào)提高距離分辨力。
9. In this dissertation the pulse compression performances of linear frequency modulation signals ( lfm ) , nonlinear frequency modulation signals ( nlfm ) and design of their side - lobes suppression filters are analyzed , and design of the pulse compression program of 4 pieces of adsp21160 in the processing unit and the program of single piece of adsp21160 and fpga in the interface unit of the pulse compression system are introduced in detail
   全文分析了線性調(diào)頻信號(hào)( lfm ) ,非線性調(diào)頻信號(hào)( nlfm )的頻域脈沖壓縮方法及其旁瓣抑制濾波器的設(shè)計(jì)和優(yōu)化,詳細(xì)介紹了脈沖壓縮系統(tǒng)中基于4片adsp21160的處理單元和單片adsp21160和fpga組成的接口單元的軟件設(shè)計(jì)。
10. This dissertation mainly studies the pulse compression waveform designing and signal processing , including the following aspects : firstly , by the pulse compression basic theory , the linear frequency modulation signal ( lfm ) , binary phase - coded signal ( bc ) and stepped - frequency ( sf ) signal are discussed respectively including the ambiguity function , pulse compression and spectrum characteristic
    本文主要進(jìn)行脈沖壓縮雷達(dá)波形設(shè)計(jì)以及信號(hào)處理方面的研究,主要體現(xiàn)在以下幾個(gè)方面:首先,從脈沖壓縮基本理論出發(fā),分別給出了線性調(diào)頻、二相編碼和頻率步進(jìn)信號(hào)的模糊函數(shù)、脈沖壓縮以及頻譜特性,對(duì)多普勒性能進(jìn)行了簡(jiǎn)要分析。
11. The second , at the high frequency primary coil , when switch turn on with control signal ( the spwm pulse is modulated ) , in the positive or negative semi - period of low frequency modulation signal , transformer coil with same direction voltage . the magnetic flux of transformer core will increase step by step . at the end , it leads to magnetic flux saturation
    二、在高頻變壓器原邊，當(dāng)開關(guān)管接收控制信號(hào)脈沖列(經(jīng)調(diào)制的spwm波列)導(dǎo)通時(shí)，在低頻調(diào)制信號(hào)的正半周或負(fù)半周內(nèi)，施加在變壓器繞組上的是同一方向的電壓，變壓器磁芯中的磁通可能將級(jí)進(jìn)地逐漸增加，導(dǎo)致磁芯飽和，造成磁偏或單向磁化，導(dǎo)致低頻電信號(hào)放大失真或由于很大的磁化電流而無(wú)法正常工作。
12. The specific route is as follows : firstly , the output signals from the multipath sensor are nornalized , i . e . , all sensor signals ( including the analog data ) are transformed into multipath square wave pulse signals to form multipath parallel condition codes . these codes are treated as input signals for dac to obtain a series of dispersed analog signals for output as input signals for the vco . finally , a high frequency modulation signal is conducted at the vco ' s output
    具體技術(shù)路線如下：先將由多路傳感器輸出的信號(hào)進(jìn)行歸一化處理，即將所有傳感器信號(hào)(包括模擬量)轉(zhuǎn)換成多路方波脈沖信號(hào)，以形成多位并行信號(hào)的狀態(tài)碼，將其作為dac的數(shù)據(jù)輸入信號(hào)，從而得到一系列離散的模擬信號(hào)輸出，作為vco的輸入信號(hào)，最終在vco輸出端形成高頻的調(diào)制信號(hào)。
13. Pulse compression technique is widely used in modern radar systems . large timeband product signals such as linear frequency modulation signals ( lfm ) , nonlinear frequency modulation signals ( nlfm ) , phase coded signals and so on are used in pulse compression technique to improve the resolution in range domain
    現(xiàn)代雷達(dá)系統(tǒng)廣泛采用脈沖壓縮技術(shù),在確保雷達(dá)作用距離和速度分辨力的前提下,采用大時(shí)帶積脈沖壓縮信號(hào):如線性調(diào)頻( lfm ) 、非線性調(diào)頻( nlfm )和相位編碼信號(hào)等,提高距離分辨力。
14. This system can process linear frequency modulation signals ( lfm ) , nonlinear frequency modulation signals ( nlfm ) and taylor quadriphase code signals with time width under 42 s and band width under 5mhz . the experimental results demonstrate that the specification characteristics meet the requirements of practical radar systems
    該系統(tǒng)可處理時(shí)寬在42 s以內(nèi)?帶寬在5mhz以下的線性調(diào)頻信號(hào)( lfm ) ,非線性調(diào)頻信號(hào)( nlfm )和taylor四相碼信號(hào),且技術(shù)指標(biāo)完全滿足實(shí)用系統(tǒng)的設(shè)計(jì)要求。
15. This makes wide - band digital receiver become a certain trend in the detecting and intercepting of radar signals field . in this dissertation , the parameter estimation algorithms for the monopulse signal , the linear frequency modulation signal and the phase coded signal are studied . according to the algorithms , a hardware platform is set up and tested using tms320c6713b mainly
    本文對(duì)單脈沖信號(hào)、線性調(diào)頻信號(hào)和相位編碼信號(hào)這三種常見的雷達(dá)信號(hào)的參數(shù)估計(jì)算法作了研究和驗(yàn)證,并根據(jù)這些算法要求,立足于當(dāng)前數(shù)字信號(hào)處理芯片( dsp )的發(fā)展,基于tms320c6713b構(gòu)建了一個(gè)信號(hào)參數(shù)估計(jì)的硬件平臺(tái)。