短接噪聲 的英文怎麼說
中文拼音 [duǎnjiēzàoshēng]
短接噪聲
英文
shorting noise-
The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation
研究表明，對于城市活斷層的抗干擾高解析度淺層地震勘探，在數據採集環節應採用具有線性或非線性變頻掃描功能的可控震源和與其相匹配的地震儀器，以及小道間距、小偏移距、多接收道、短排列和高頻檢波器接收的工作方法；在數據處理與解釋環節，要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子波壓縮技術、子波零相位化技術和疊前偏移技術等的應用。Under the condition of " comparatively weak correlation between the two noises involved, coherence function is used as a frequency domain amplification factor for improving snr of the output signal to the filter and the speech enhancement effect. meanwhile, a real - time recursive algorithm is put forward in substitute for current algorithms based on short time fourier transform. the new algorithm will simplify computations and will be suited for real - time implementation together with the adaptive systems
接著針對上述nanc系統兩路輸入信號噪聲相關性弱的情況，用相干函數作頻域增益因子來提高輸出信噪比與改善語音增強效果，同時，通過一種實時迭代演算法解決了短時傅氏變換計算量大的問題，簡化了計算，便於實時處理與實際應用。The paper discusses the part of asic design of tcm ( trellis coded modulation ) in hdtv 8vsb terrestrial channel broadcasting receiver chip. in testing, the tcm can improve the signal - to - noise by 3. 3db compared with uncoded 4 - vsb modulation, and with the 12 path intrasegment interleaving in tcm coding and viterbi decoding, system can control short burst noise error efficiently
在高清晰度電視通道接收晶元中內碼是8 ? vsb的格狀編碼，在系統性能上使用tcm編碼要比未編碼有3 . 3db的編碼增益，另外在格狀編碼中加入了12路的內交織，可有效的抑制短的突發噪聲對接收端viterbi解碼性能的影響。The experiment results confirmed convincingly that noises measurement method not only is feasible, but also have many advant ages, such as the similarity of detection conditions to the actual state, short test time, good sensitivity and non - destructivity
而且與其它傳統的測試方法相比，噪聲方法有著測試條件接近正常工作狀態、測試時間短、敏感度高和非破壞性等優點，有較好的應用前景。This paper gives a time - synchronization technique bases on gps time service signal which is used in broad band seismic recorder 。 by world coordination time offered by gps - - utc ( usno ), adjust local clock base on gps signal, gain high nicety clock signal, clock precision reachs 10 - 6 。 this clock is the time source of broad band seismic recorder, bring the whole seismic recorder works in same time base. 1pps time base with high stability can be used as in - phase, spring, time and start - stop of every collection mode, while the scale under second make a precise time mark to receive data of broad band seismic recorder
針對接收機中gps信號的噪聲進行kalman濾波軟體處理， kalman濾波可以對gps信號與本地晶振時鐘的時差數據在大噪聲中進行平滑，在較短時間內估計出高精度的時差數據。系統消除了gps秒脈沖信號的ms級隨機誤差，把晶振秒脈沖的長期穩定度鎖定到gps信號的穩定度上;在gps信號失效時給出了可行措施，能夠保證在任何情況下產生一個穩定、高精度秒脈沖信號，誤差在1 s內。Simulator presented in this paper provides a direct interface for the test of shortwave communication system, which well represents various features of hf channel such as multi - path delay, rayleigh fading, doppler shift, doppler spread, gaussian noise and impulsive interference, etc. in order to realize the channel simulation for the intermediate frequency signal, we, inspired by the idea of soft - defined radio, bring forward a new design method that the channel simulator consists of several dsp chips
本文研製的模擬器提供介面直接對短波通信系統進行測試，能夠全面反映短波通道的多徑時延、瑞利衰落、多普勒頻移、多普勒擴展、高斯噪聲和脈沖干擾等特性。為了實現對中頻信號的通道模擬，開發出一個結合軟體無線電思想的由多個數字信號處理晶元構成的短波通道物理模擬器。In order to regulation environment of airports and protect the environment in china, government should not only intensify direct regulation, but also take noise charges and emission charges, restrict the use of land, and take aci ' s advice
我國除繼續強化已有的直接管制方式外，還可以從收取以保護環境為目的的噪聲費和排放物費、限制機場土地的使用、採取國際機場協會提出的短期和長期機場環境保護措施三個方面進一步加強機場環境管制。This algorism can resolve 2 signals at the same time, and it can properly work with a lower snr. comparing with other traditional algorisms, the one enhanced the digital receiver ’ s anti - noise capability and shorted the response time
該演算法可同時檢測2個信號，能在4db條件下工作，相比與傳統的短數據頻率檢測演算法，提高了數字接收機的抗噪聲能力，縮短了接收機的調諧時間。This low noise amplifier and the 1. 5ghz 1. 8ghz low noise amplifier will work well in the environment under - 40oc, when the input port and the output port connect with open, short or 50 ? loads. both amplifiers achieve leading level in domestic
該低噪聲放大器和1 . 5ghz 1 . 8ghz的低噪聲放大器能夠保證- 40oc的環境溫度下，在輸入埠和輸出埠分別接短路器、開路器和50負載九種情況下保持穩定，而且其噪聲系數、增益等指標都已達到國內先進水平。分享友人