wideband signal 中文意思是什麼
wideband signal
解釋
寬帶信號-
The catv charge and control system is mainly composed of the management software 、 the header data modulator and the terminal charge and control equipment. i am responsible for design catv charge and control equipment and test system. the header data modulator is used to encrypt the control single from computer and transmit it into the appointed frequency. the terminal charge and control equipment demodulate out the control single from data modulator and transmit it to the addressing control part, where the demodulated fsk single is received and well - handled by the cpu unit, decode the unauthorized signals and deliver it to the shut point, shut point make use of capability of wideband anf characteristic of shut, then the signal of illegal customer will be turn off and vice versa, the legal customer can receive the normal signal
前端數據調制器完成對計算機輸出的控制信號加密處理，將指令碼載送到一指定頻率點。終端收費控制器解調出控制信號，送至單片機尋址控制部分。單片機尋址控制部分接收經fsk數據解調器送來的信號，送入cpu單元后，解出不授權信號，然後向關斷部分送入信號，關斷部分利用pin二極體的寬帶工作能力以及關斷特性，實現對非授權用戶或者非法用戶的信號關斷，使之不能正常收視，繳費用戶進行開通正常收視，達到控制用戶通道的管理。 -
Wideband ambiguity function ( waf ) is the powerful tool to analyze the wideband signal, and it is also coherent to cwt
寬帶模糊度函數是寬帶信號分析的有力工具，它與連續小波變換也是內在一致的。 -
The basic theory of wideband signal processing is discussed and presented. the coherence among cwt, wcp and waf is pointed out emphatically
論述了寬帶信號處理的基本理論，指明了連續小波變換與寬帶相關處理、寬帶模糊度函數的一致性。 -
To utilize the advantages of dsp chips, the system should be computing sources economical. according to digital signal processing theory, the poly - phase fir can help reduce the workloads of the ddc / duc. therefore, adding the complex carrier mixers, the channelization system ( a method of using a single wideband facility to transmit many relatively narrow - bandwidth signals. by subdividing the frequency spectrum used in the wideband channel ) can be formed utilizing the characters of fft
為了使開發出的軟體可以適用於高速dsp器件開發，節省系統資源，課題首先從數字信號處理的理論進行分析，得出可以利用抽樣率轉換的數字濾波器的特點，即多相濾波實現數字上下變頻計算負擔的減小，之後進一步將多相濾波器與頻譜搬移部分結合，通過公式的推導，得出可利用快速傅立葉變換的特點實現多路信號的通道化發射和接收的處理模型。 -
In this dissertation, some algorithms and techniques of digital beam forming ( dbf ) of the conformal array are studied and also adaptive digital beam forming ( adbf ) of uniformity circular array ( uca ) based on wideband signal is investigated. this dissertation is organized as followed. in the first part of dissertation, the basic theory of conformal array is introduced
本文研究了共形相控陣的數字波束形成技術，對共形陣的相關技術進行了詳細介紹，並且對一些常規共形陣的數字波束形成技術進行了研究，得到較好的模擬結果，此外，還對寬帶共形陣數字波束形成技術及性能進行了討論、模擬及其性能分析。 -
The computer simulation results verify the validity of two adaptive algorithms applied to circular array. the algorithms are least square based on qr decompose ( qrd - ls ) and sampling matrix inversion based on qr decompose ( qrd - smi ). then we apply circular array with wideband signal
其次，驗證了基於qr分解的最小二乘演算法（ qrd - ls ）和基於qr分解的采樣矩陣求逆方法（ qrd - smi ）兩種自適應演算法在均勻圓陣中的有效性。 -
Lfm signal is a classic pulse compression signal and it is one of the ultra - wideband radar waveforms, there is sophisticated theoretical basis of its generating, receiving and processing
線性調頻信號作為一種典型的脈壓信號，同時也是超寬帶雷達調制波形中的一種，其產生和接收處理已具備了較為成熟的理論研究。 -
Time - domain measurements and processing of ultra - wideband scattering signal
超寬帶散射信號的時域測量及處理 -
The fundamental concepts and theories of array signal processing are discussed summarily, and the model of wideband array signal processing is set up
系統概要地論述了陣列信號處理的基本概念和理論，給出了寬帶陣列信號處理的模型。 -
3. the typical wideband high - resolution method - the coherent signal subspace method ( cssm ) is studied
研究了寬帶高分辨陣列信號處理的典型演算法? ?相干信號子空間演算法（ cssm ： coherentsignalsubspacemethod ） 。 -
The main work of the dissertation is as follows. ( 1 ) signal characteristics under modern electronic reconnaissance environment is analyzed. it ’ s pointed out that wideband digital receiver must satisfy wide monitoring band, pipeline operation and almost real - time response
論文主要工作如下: （ 1 ）分析了現代電子偵察環境下的信號特徵，指出寬帶數字接收機必須滿足寬監視帶寬、流水作業以及近實時的響應時間。 -
In the second chapter, a wideband mimo channel model with multiple - tap was integrated according to the angle of departure of the transmitting signal and its spread angle, the angle of arrival of the receiving signal and its spread angle, power azimuth spectra, doppler spectrum and the geometric construction of antenna array both sides of transmit and receive, on the basis of full research on the theories of space - time channel model proposed in the recent literature
第二章在對最近文獻中提出的一些空時通道模型理論進行詳細研究的基礎上，根據發射信號的離開角及其擴展角、接收信號的到達角及其擴展角、功率方位譜、多普勒譜和收發兩端天線的拓撲結構，綜合了一個多抽頭的寬帶mimo通道模型。 -
Secondly, basing on single channel if sr receiver mathematic model, this thesis has designed if sr receiver subsystem and brought forward its design project and system circuit principle diagram, and explained the system working principle. furthermore, this thesis introduces the working principles and respective applications of wideband high - speed adc ad6640, ddc ad6620 and high - speed dsp tms320c6713 according with the if sr receiver subsystem high - speed analog digital conversion department, digital down conversion department and high speed digital signal processing department. thirdly, the thesis emphatically demonstrates the software realization department of the if sr receiver subsystem, which including ad6620 ' s inner parameter software setup, tms320c6713 data transmission and processing and the quadrant demodulation algorithm program realization
其次，基於單通道中頻軟體無線電接收機數學模型，本文設計了中頻（ if ， intermediatefrequency ）軟體無線電接收機子系統，給出了中頻軟體無線電接收機子系統的設計方案和系統電路原理圖，說明了系統工作原理，並分別對應系統中的高速模數轉換部分、數字下變頻部分、基帶數字碩士學位論文軟體無線電理論研究及中頻軟體無線電接收機子系統設計信號處理部分，介紹了高速adcad664o ，數字下變頻器（ ddc ， digitaldownconverter ） ad6620 ，高速數字信號處理器（ dsp ， digitalsignalproeessor ） tms320c6713的工作原理，以及它們在中頻軟體無線電接收機子系統中的應用。 -
The main work is given as follows : the stepped - frequency waveform synthesizing the wideband signal, the synthetic range profile ( srp ) by ifft, the range resolution of stepped - frequency waveform, the effect of the radial velocity on the srp, the radial velocity compensation, ambiguity function, waveform design and stepped frequency sar imaging and so on
包括：頻率步進波形合成超寬帶信號分析， ifft方法獲得目標一維距離像與距離解析度分析，徑向速度對目標距離像的影響、速度補償、頻率步進信號的模糊函數分析，以及頻率步進波形照射下的合成孔徑雷達成像、波形設計與系統設計。 -
With the rapid development of dsp technology, it has become a powerful tool in the wideband speech signal processing, which makes it possible to implement the complex algorithms for wideband speech in real time
Dsp技術的高速發展為寬帶語音信號處理提供了強有力的工具，使得較為復雜的寬帶語音編解碼演算法的實時實現成為可能。 -
Two kinds of typical wideband signal, frequency modulation ( fm ) signal and frequency spread signal, is analyzed qualitatively with wideband ambiguity function
以寬帶模糊度函數為工具定性地分析了兩類典型寬帶信號，即調頻信號和頻率分集信號。 -
This dissertation investigates primarily the channelized receiver ’ s application in electronic reconnaissance, and puts forward a project of the wideband signal reconstruction system including 4 - band efficient channelized receivers and a project which is 8 - band efficient digital channelized ifm receiver, then testifies them with simulation
文中重點討論了通道化數字接收機在電子偵察中的應用，提出了基於數字通道化高效結構的4通道重建系統方案和8通道ifm接收機方案，並通過系統模擬論證了方案的正確性。 -
An estimation algorithm for the arrival direction of wideband signal
一種寬帶信號方位估計演算法 -
Generation and synchronization of chaotic wideband signal
寬帶混沌信號的產生與同步 -
After comparing several analog and digital generation methods of lfm signal, this paper confirms the system scheme as direct digital synthesis plus quadrature modulation. combined with agilent arbitrary waveform generator and phasor signal generator, a generation system is established and a ultra - wideband signal, whose bandwidth is 1ghz and carrier frequency is 4ghz, is generated
通過對幾種模擬與數字線性調頻信號的產生方法的比較，本文採用了以直接數字波形合成（ ddws ）加正交調制的系統方案，並結合實際的儀器設備，產生了帶寬為1ghz ，載頻4ghz的超寬帶線性調頻信號。
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