中英
1
spectrum spreading中文是什么意思
- 中文翻譯
- 造句
- 頻譜擴(kuò)散
- spectrum n. (pl. -tra ) 1.【物理學(xué)】譜，光譜；波 ...
- spread vt. (spread) 1.伸開，伸長(zhǎng)(手臂等)，展開 ...
- spectrum spreading code sequence 頻譜擴(kuò)展碼序列
- spectrum spreading factor 頻譜擴(kuò)展因數(shù)
- spreading 就偵察線散開; 跨期買賣；跨價(jià)買賣; 擴(kuò)展; 擴(kuò)張; 拉布; 使藥液能散布; 套期圖利：同時(shí)買進(jìn)與賣出相關(guān)期貨合約以獲取價(jià)差利潤(rùn)的各種套利方式; 涂布; 展寬 撒布 接長(zhǎng) 攤鋪 套期圖利 噴散 敷 敷涂 分散風(fēng)險(xiǎn) 蔓延 加寬焊道
- a spectrum of 連續(xù)的，連串的
- spectrum n. (pl. -tra ) 1.【物理學(xué)】譜，光譜；波譜；能譜，質(zhì)譜。 2.【無(wú)線電】射頻頻譜；無(wú)線電(信號(hào))頻譜。 3.【心理學(xué)】(眼睛的)余像；殘像。 4.〔轉(zhuǎn)義〕范圍，幅度；(連續(xù)的)系列。 an absorption spectrum 吸收(光)譜。 a bright line spectrum 線狀光譜。 an optical spectrum 光譜。 a solar spectrum 太陽(yáng)光譜。 a wide spectrum of opinion 意見的不同幅度甚大。
- spreading rate spreading capacity 涂布率
- angular spreading 角傳播; 角擴(kuò)散; 角擴(kuò)展
- asymmetric spreading 不對(duì)稱擴(kuò)張
- axis of spreading 擴(kuò)張軸
- backarc spreading 弧后擴(kuò)張
- band spreading 帶狀撒布; 頻帶擴(kuò)展; 頻帶散布; 譜帶擴(kuò)展
- beam spreading 束散
- binder spreading 粘合劑灑布
- blanket spreading 墊帶刮涂
- brush spreading 刷涂
- concrete spreading 混凝土平倉(cāng)
- continental spreading 大陸擴(kuò)張
- crustal spreading 地殼擴(kuò)張
- cylindrical spreading 柱面擴(kuò)展
- direct spreading 直接蔓延
- double spreading 兩面貼膠; 雙面涂膠
- dust spreading 撤巖粉
- even spreading 均勻撒布
- Research on spectrum spreading technology based on a local radio intranet
無(wú)線局域網(wǎng)擴(kuò)頻技術(shù)研究及實(shí)現(xiàn) - But airborne radar will face highly complicatied clutter environment . the complexities of clutter back ground mainly embody in large amplitude interference of ground clutter , clutter spectrum spread caused by platform movement effect
但由于機(jī)載雷達(dá)的應(yīng)用面臨非常復(fù)雜的雜波環(huán)境,雜波功率很強(qiáng),載機(jī)的平臺(tái)運(yùn)動(dòng)效應(yīng)使雜波譜展寬。 - Adaptive interference suppression can improve further the anti - interference capacity of spectrum spreading ( ss ) systems , reduce the requirement of system processing gain , and thus is important to military communications system
自適應(yīng)干擾抑制能進(jìn)一步提高擴(kuò)頻通信系統(tǒng)的抗干擾能力，降低對(duì)處理增益的要求，因而具有重要的軍事意義。 - When signals pass high power amplifier , they would be distorted in amplitude and phase , leading to spectrum spread and distortion of in - band signals , both of which would weaken performance of the whole system in turn
在無(wú)線通信中,信號(hào)在通過(guò)高功率放大器時(shí)會(huì)產(chǎn)生幅度和相位失真,造成頻譜擴(kuò)展以及帶內(nèi)信號(hào)畸變,導(dǎo)致整個(gè)系統(tǒng)性能的降低。 - This dissertion majored in dicussing the signal source and signal transmitting channel ’ s code and decoding of spectrum spread radio station under the concept of the software wirelss radio . the author ’ s main work and new ideas are listed blow : 1
本文主要討論的是在軟件無(wú)線電的構(gòu)架下討論和實(shí)現(xiàn)跳擴(kuò)頻電臺(tái)的語(yǔ)音編解碼以及信道上的編碼和解碼的理論和實(shí)現(xiàn)。 - The different transmit and receive diversity schemes of wcdma are given out in the fifth chapter , and pay much attention to stbc application in wcdma specially , compared the sequence of spectrum spreading and stbc , give out the conclusion : spectrum spreading firstly is better than later
特別針對(duì)空時(shí)編碼在wcdma中的應(yīng)用作了重點(diǎn)研究,對(duì)擴(kuò)頻和空時(shí)編碼的先后順序進(jìn)行了比較研究,得出了擴(kuò)頻在前要優(yōu)于擴(kuò)頻在后的結(jié)論。 - 1 ) the ground clutter is very strong when radar works in its down - look mode . 2 ) the clutter has the character of space - time coupling and the clutter spectrum spreads due to the movement of platform . 3 ) the lower repeat frequency results in doppler blur and the clutter spectrum spreads in the whole doppler domain
地面動(dòng)目標(biāo)檢測(cè)的最大難點(diǎn)： 1 )雷達(dá)下視時(shí)地雜波特別強(qiáng); 2 )由于平臺(tái)運(yùn)動(dòng)，地雜波存在著空時(shí)耦合，雜波譜展寬； 3 )為避免距離模糊，采用較低的重復(fù)頻率，但會(huì)存在多普勒模糊，地雜波譜擴(kuò)散到整個(gè)多普勒域。
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