4 the leaked triangular wave of fmcw millimeter - wave radar has been analyzed 整個(gè)接收機(jī)中頻放大倍數(shù)為25000倍, 88db 。
It can restrain the strong interference signal - leaked triangular wave and is able to substitute the agc to some extent 壓縮網(wǎng)絡(luò)的帶寬為imhz ,壓縮動(dòng)慫范圍為80db 。
The typical control methods for apf such as triangular wave modulate , hysteresis control and timing control , etc , these methods all have some demerits 而有源電力濾波器常用的控制方法為三角波調(diào)制、滯環(huán)控制和定時(shí)控制等常規(guī)的pwm控制法,這些方法均存在一定的不足。
The three - phase spwm pulses are generated through sine wave compared with triangular wave . during design , we make use of a changed structure of nco ( numerically controlled oscillator ) to 數(shù)字化設(shè)計(jì)是本系統(tǒng)的特點(diǎn),系統(tǒng)最終生成的三相spwm脈沖是基于三相正弦調(diào)制波和三角載波比較得到的。
( 2 ) the properties of displacement measurement based on self - mixing interference are mathematically analyzed . first , how the external phase influences upon the output frequency , intensity , power and line - width is discussed . then , the output signal ' s properties modulated by four waves , including sine wave , square wave , triangular wave and saw tooth wave , is discussed ( 2 )通過(guò)數(shù)值分析討論了自混合干涉位移測(cè)量系統(tǒng)的基本特性,包括外腔相位對(duì)輸出光頻、輸出強(qiáng)度、輸出功率、譜線寬度的影響,以及正弦波、方波、三角波、鋸齒波調(diào)制反射體位移時(shí)輸出信號(hào)的特點(diǎn)。
The experiment apparatus has been developed , which is based on software ( labview ) and hardware ( pci board ni 6024e ) . the displacements and generative force at the tip of the ipmc actuators were measured with respect to the different voltages , frequents and various waveforms which include square , sinusoidal , and triangular wave 實(shí)驗(yàn)選取了不同電壓幅值,不同頻率的方波、三角波、正弦波三種波形作為電激勵(lì)信號(hào),利用高速攝像記錄ipmc的位移變形,并通過(guò)力傳感器實(shí)測(cè)了ipmc試樣末端的輸出力。
The adaptive signal processing technology is a rising science embranchment , which composed with many subjects and fields . in this paper , application of the adaptive filter to elimination of the leaked triangular wave and the adaptive signal processing of the fmcw millimeter - wave radar system is studied thoroughly . the use of an adaptive filter offers an attractive solution to the problem as it usually provides a significant improvement in performance over the use of the conventional methods 在系統(tǒng)的自適應(yīng)信號(hào)處理研究中,系統(tǒng)實(shí)現(xiàn)采用稱為自調(diào)諧濾波器的自適應(yīng)對(duì)消器,結(jié)果表明,在自適應(yīng)過(guò)程結(jié)束后,利用該方案可以得到和原始攜帶信息的理想干弦波十分近似的正弦波輸出,其誤差是一個(gè)具有很小振幅的隨機(jī)過(guò)程,具有很好的濾波效果。